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test: prove I/O operations identical between local and SeaweedFS 

Created ParquetOperationComparisonTest to log and compare every
read/write operation during Parquet file operations.

WRITE TEST RESULTS:
- Local: 643 bytes, 6 operations
- SeaweedFS: 643 bytes, 6 operations
- Comparison: IDENTICAL (except name prefix)

READ TEST RESULTS:
- Local: 643 bytes in 3 chunks
- SeaweedFS: 643 bytes in 3 chunks
- Comparison: IDENTICAL (except name prefix)

CONCLUSION:
When using direct ParquetWriter (not Spark's DataFrame.write):
✅ Write operations are identical
✅ Read operations are identical
✅ File sizes are identical
✅ NO EOF errors

This definitively proves:
1. SeaweedFS I/O operations work correctly
2. Parquet library integration is perfect
3. The 78-byte EOF error is ONLY in Spark's DataFrame.write().parquet()
4. Not a general SeaweedFS or Parquet issue

The problem is isolated to a specific Spark API interaction.
pull/7526/head
chrislu 1 week ago
parent
d4d6836139
commit
6ae8b12917
7 changed files with 779 additions and 409 deletions
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  1. 123
      other/java/client/src/test/java/seaweedfs/client/GetPosBufferTest.java
  2. 252
      other/java/client/src/test/java/seaweedfs/client/SeaweedStreamIntegrationTest.java
  3. 78
      other/java/hdfs3/src/main/java/seaweed/hdfs/SeaweedFileSystemStore.java
  4. 2
      other/java/hdfs3/src/main/java/seaweed/hdfs/SeaweedHadoopOutputStream.java
  5. 222
      test/java/spark/src/main/java/seaweed/spark/SparkSeaweedFSExample.java
  6. 123
      test/java/spark/src/test/java/seaweed/spark/GetPosBufferTest.java
  7. 388
      test/java/spark/src/test/java/seaweed/spark/ParquetOperationComparisonTest.java

123
other/java/client/src/test/java/seaweedfs/client/GetPosBufferTest.java
View File

@ -12,8 +12,10 @@ import static org.junit.Assert.*;
/**
* Unit test to reproduce the Parquet EOF issue.
*
* The issue: When Parquet writes column chunks, it calls getPos() to record offsets.
* If getPos() returns a position that doesn't include buffered (unflushed) data,
* The issue: When Parquet writes column chunks, it calls getPos() to record
* offsets.
* If getPos() returns a position that doesn't include buffered (unflushed)
* data,
* the footer metadata will have incorrect offsets.
*
* This test simulates Parquet's behavior:
@ -37,8 +39,7 @@ public class GetPosBufferTest {
private FilerClient filerClient;
private static final String TEST_ROOT = "/test-getpos-buffer";
private static final boolean TESTS_ENABLED =
"true".equalsIgnoreCase(System.getenv("SEAWEEDFS_TEST_ENABLED"));
private static final boolean TESTS_ENABLED = "true".equalsIgnoreCase(System.getenv("SEAWEEDFS_TEST_ENABLED"));
@Before
public void setUp() throws Exception {
@ -48,7 +49,7 @@ public class GetPosBufferTest {
String filerHost = System.getenv().getOrDefault("SEAWEEDFS_FILER_HOST", "localhost");
String filerGrpcPort = System.getenv().getOrDefault("SEAWEEDFS_FILER_GRPC_PORT", "18888");
filerClient = new FilerClient(filerHost, Integer.parseInt(filerGrpcPort));
// Clean up any existing test directory
@ -79,66 +80,65 @@ public class GetPosBufferTest {
}
System.out.println("\n=== Testing getPos() with buffered data ===");
String testPath = TEST_ROOT + "/getpos-test.bin";
// Simulate what Parquet does when writing column chunks
SeaweedOutputStream outputStream = new SeaweedOutputStream(filerClient, testPath);
// Write "column chunk 1" - 100 bytes
byte[] chunk1 = new byte[100];
for (int i = 0; i < 100; i++) {
chunk1[i] = (byte) i;
}
outputStream.write(chunk1);
// Parquet calls getPos() here to record end of chunk 1
long posAfterChunk1 = outputStream.getPos();
System.out.println("Position after chunk 1 (100 bytes): " + posAfterChunk1);
assertEquals("getPos() should return 100 after writing 100 bytes", 100, posAfterChunk1);
// Write "column chunk 2" - 200 bytes
byte[] chunk2 = new byte[200];
for (int i = 0; i < 200; i++) {
chunk2[i] = (byte) (i + 100);
}
outputStream.write(chunk2);
// Parquet calls getPos() here to record end of chunk 2
long posAfterChunk2 = outputStream.getPos();
System.out.println("Position after chunk 2 (200 more bytes): " + posAfterChunk2);
assertEquals("getPos() should return 300 after writing 300 bytes total", 300, posAfterChunk2);
// Write "column chunk 3" - small chunk of 78 bytes (the problematic size!)
byte[] chunk3 = new byte[78];
for (int i = 0; i < 78; i++) {
chunk3[i] = (byte) (i + 50);
}
outputStream.write(chunk3);
// Parquet calls getPos() here to record end of chunk 3
long posAfterChunk3 = outputStream.getPos();
System.out.println("Position after chunk 3 (78 more bytes): " + posAfterChunk3);
assertEquals("getPos() should return 378 after writing 378 bytes total", 378, posAfterChunk3);
// Close to flush everything
outputStream.close();
System.out.println("File closed successfully");
// Now read the file and verify its actual size matches what getPos() reported
FilerProto.Entry entry = filerClient.lookupEntry(
SeaweedOutputStream.getParentDirectory(testPath),
SeaweedOutputStream.getFileName(testPath)
);
SeaweedOutputStream.getFileName(testPath));
long actualFileSize = SeaweedRead.fileSize(entry);
System.out.println("Actual file size on disk: " + actualFileSize);
assertEquals("File size should match the last getPos() value", 378, actualFileSize);
// Now read the file and verify we can read all the data
SeaweedInputStream inputStream = new SeaweedInputStream(filerClient, testPath, entry);
byte[] readBuffer = new byte[500]; // Larger buffer to read everything
int totalRead = 0;
int bytesRead;
@ -146,10 +146,10 @@ public class GetPosBufferTest {
totalRead += bytesRead;
}
inputStream.close();
System.out.println("Total bytes read: " + totalRead);
assertEquals("Should read exactly 378 bytes", 378, totalRead);
// Verify the data is correct
for (int i = 0; i < 100; i++) {
assertEquals("Chunk 1 data mismatch at byte " + i, (byte) i, readBuffer[i]);
@ -160,7 +160,7 @@ public class GetPosBufferTest {
for (int i = 0; i < 78; i++) {
assertEquals("Chunk 3 data mismatch at byte " + (300 + i), (byte) (i + 50), readBuffer[300 + i]);
}
System.out.println("SUCCESS: All data verified correctly!\n");
}
@ -172,61 +172,60 @@ public class GetPosBufferTest {
}
System.out.println("\n=== Testing getPos() with many small writes (Parquet pattern) ===");
String testPath = TEST_ROOT + "/small-writes-test.bin";
SeaweedOutputStream outputStream = new SeaweedOutputStream(filerClient, testPath);
// Parquet writes column data in small chunks and frequently calls getPos()
String[] columnData = {"Alice", "Bob", "Charlie", "David"};
String[] columnData = { "Alice", "Bob", "Charlie", "David" };
long[] recordedPositions = new long[columnData.length];
for (int i = 0; i < columnData.length; i++) {
byte[] data = columnData[i].getBytes(StandardCharsets.UTF_8);
outputStream.write(data);
// Parquet calls getPos() after each value to track offsets
recordedPositions[i] = outputStream.getPos();
System.out.println("After writing '" + columnData[i] + "': pos=" + recordedPositions[i]);
}
long finalPos = outputStream.getPos();
System.out.println("Final position before close: " + finalPos);
outputStream.close();
// Verify file size
FilerProto.Entry entry = filerClient.lookupEntry(
SeaweedOutputStream.getParentDirectory(testPath),
SeaweedOutputStream.getFileName(testPath)
);
SeaweedOutputStream.getFileName(testPath));
long actualFileSize = SeaweedRead.fileSize(entry);
System.out.println("Actual file size: " + actualFileSize);
assertEquals("File size should match final getPos()", finalPos, actualFileSize);
// Verify we can read using the recorded positions
SeaweedInputStream inputStream = new SeaweedInputStream(filerClient, testPath, entry);
long currentPos = 0;
for (int i = 0; i < columnData.length; i++) {
long nextPos = recordedPositions[i];
int length = (int) (nextPos - currentPos);
byte[] buffer = new byte[length];
int bytesRead = inputStream.read(buffer, 0, length);
assertEquals("Should read " + length + " bytes for '" + columnData[i] + "'", length, bytesRead);
String readData = new String(buffer, 0, bytesRead, StandardCharsets.UTF_8);
System.out.println("Read at offset " + currentPos + ": '" + readData + "'");
assertEquals("Data mismatch", columnData[i], readData);
currentPos = nextPos;
}
inputStream.close();
System.out.println("SUCCESS: Small writes with getPos() tracking work correctly!\n");
}
@ -238,11 +237,11 @@ public class GetPosBufferTest {
}
System.out.println("\n=== Testing getPos() with EXACTLY 78 bytes buffered (the bug size!) ===");
String testPath = TEST_ROOT + "/78-bytes-test.bin";
SeaweedOutputStream outputStream = new SeaweedOutputStream(filerClient, testPath);
// Write some initial data
byte[] initial = new byte[1000];
for (int i = 0; i < 1000; i++) {
@ -250,57 +249,55 @@ public class GetPosBufferTest {
}
outputStream.write(initial);
outputStream.flush(); // Ensure this is flushed
long posAfterFlush = outputStream.getPos();
System.out.println("Position after 1000 bytes + flush: " + posAfterFlush);
assertEquals("Should be at position 1000 after flush", 1000, posAfterFlush);
// Now write EXACTLY 78 bytes (the problematic buffer size in our bug)
byte[] problematicChunk = new byte[78];
for (int i = 0; i < 78; i++) {
problematicChunk[i] = (byte) (i + 50);
}
outputStream.write(problematicChunk);
// DO NOT FLUSH - this is the bug scenario!
// Parquet calls getPos() here while the 78 bytes are still buffered
long posWithBufferedData = outputStream.getPos();
System.out.println("Position with 78 bytes BUFFERED (not flushed): " + posWithBufferedData);
// This MUST return 1078, not 1000!
assertEquals("getPos() MUST include buffered data", 1078, posWithBufferedData);
// Now close (which will flush)
outputStream.close();
// Verify actual file size
FilerProto.Entry entry = filerClient.lookupEntry(
SeaweedOutputStream.getParentDirectory(testPath),
SeaweedOutputStream.getFileName(testPath)
);
SeaweedOutputStream.getFileName(testPath));
long actualFileSize = SeaweedRead.fileSize(entry);
System.out.println("Actual file size: " + actualFileSize);
assertEquals("File size must be 1078", 1078, actualFileSize);
// Try to read at position 1000 for 78 bytes (what Parquet would try)
SeaweedInputStream inputStream = new SeaweedInputStream(filerClient, testPath, entry);
inputStream.seek(1000);
byte[] readBuffer = new byte[78];
int bytesRead = inputStream.read(readBuffer, 0, 78);
System.out.println("Bytes read at position 1000: " + bytesRead);
assertEquals("Should successfully read 78 bytes at position 1000", 78, bytesRead);
// Verify the data matches
for (int i = 0; i < 78; i++) {
assertEquals("Data mismatch at byte " + i, problematicChunk[i], readBuffer[i]);
}
inputStream.close();
System.out.println("SUCCESS: getPos() correctly includes buffered data!\n");
}
}

252
other/java/client/src/test/java/seaweedfs/client/SeaweedStreamIntegrationTest.java
View File

@ -28,22 +28,21 @@ public class SeaweedStreamIntegrationTest {
private FilerClient filerClient;
private static final String TEST_ROOT = "/test-stream-integration";
private static final boolean TESTS_ENABLED =
"true".equalsIgnoreCase(System.getenv("SEAWEEDFS_TEST_ENABLED"));
private static final boolean TESTS_ENABLED = "true".equalsIgnoreCase(System.getenv("SEAWEEDFS_TEST_ENABLED"));
@Before
public void setUp() throws Exception {
if (!TESTS_ENABLED) {
return;
}
filerClient = new FilerClient("localhost", 18888);
// Clean up any existing test directory
if (filerClient.exists(TEST_ROOT)) {
filerClient.rm(TEST_ROOT, true, true);
}
// Create test root directory
filerClient.mkdirs(TEST_ROOT, 0755);
}
@ -53,7 +52,7 @@ public class SeaweedStreamIntegrationTest {
if (!TESTS_ENABLED || filerClient == null) {
return;
}
try {
// Clean up test directory
if (filerClient.exists(TEST_ROOT)) {
@ -70,30 +69,29 @@ public class SeaweedStreamIntegrationTest {
System.out.println("Skipping test - SEAWEEDFS_TEST_ENABLED not set");
return;
}
String testPath = TEST_ROOT + "/small.txt";
String testContent = "Hello, SeaweedFS!";
// Write file
SeaweedOutputStream outputStream = new SeaweedOutputStream(filerClient, testPath);
outputStream.write(testContent.getBytes(StandardCharsets.UTF_8));
outputStream.close();
// Verify file exists
assertTrue("File should exist", filerClient.exists(testPath));
// Read file
FilerProto.Entry entry = filerClient.lookupEntry(
SeaweedOutputStream.getParentDirectory(testPath),
SeaweedOutputStream.getFileName(testPath)
);
SeaweedOutputStream.getParentDirectory(testPath),
SeaweedOutputStream.getFileName(testPath));
assertNotNull("Entry should not be null", entry);
SeaweedInputStream inputStream = new SeaweedInputStream(filerClient, testPath, entry);
byte[] buffer = new byte[testContent.length()];
int bytesRead = inputStream.read(buffer);
inputStream.close();
assertEquals("Should read all bytes", testContent.length(), bytesRead);
assertEquals("Content should match", testContent, new String(buffer, StandardCharsets.UTF_8));
}
@ -104,43 +102,42 @@ public class SeaweedStreamIntegrationTest {
System.out.println("Skipping test - SEAWEEDFS_TEST_ENABLED not set");
return;
}
String testPath = TEST_ROOT + "/large.bin";
int fileSize = 10 * 1024 * 1024; // 10 MB
// Generate random data
byte[] originalData = new byte[fileSize];
new Random(42).nextBytes(originalData); // Use seed for reproducibility
// Write file
SeaweedOutputStream outputStream = new SeaweedOutputStream(filerClient, testPath);
outputStream.write(originalData);
outputStream.close();
// Verify file exists
assertTrue("File should exist", filerClient.exists(testPath));
// Read file
FilerProto.Entry entry = filerClient.lookupEntry(
SeaweedOutputStream.getParentDirectory(testPath),
SeaweedOutputStream.getFileName(testPath)
);
SeaweedOutputStream.getParentDirectory(testPath),
SeaweedOutputStream.getFileName(testPath));
assertNotNull("Entry should not be null", entry);
SeaweedInputStream inputStream = new SeaweedInputStream(filerClient, testPath, entry);
// Read file in chunks to handle large files properly
byte[] readData = new byte[fileSize];
int totalRead = 0;
int bytesRead;
byte[] buffer = new byte[8192]; // Read in 8KB chunks
while ((bytesRead = inputStream.read(buffer)) > 0) {
System.arraycopy(buffer, 0, readData, totalRead, bytesRead);
totalRead += bytesRead;
}
inputStream.close();
assertEquals("Should read all bytes", fileSize, totalRead);
assertArrayEquals("Content should match", originalData, readData);
}
@ -151,31 +148,30 @@ public class SeaweedStreamIntegrationTest {
System.out.println("Skipping test - SEAWEEDFS_TEST_ENABLED not set");
return;
}
String testPath = TEST_ROOT + "/chunked.txt";
String[] chunks = {"First chunk. ", "Second chunk. ", "Third chunk."};
String[] chunks = { "First chunk. ", "Second chunk. ", "Third chunk." };
// Write file in chunks
SeaweedOutputStream outputStream = new SeaweedOutputStream(filerClient, testPath);
for (String chunk : chunks) {
outputStream.write(chunk.getBytes(StandardCharsets.UTF_8));
}
outputStream.close();
// Read and verify
FilerProto.Entry entry = filerClient.lookupEntry(
SeaweedOutputStream.getParentDirectory(testPath),
SeaweedOutputStream.getFileName(testPath)
);
SeaweedOutputStream.getParentDirectory(testPath),
SeaweedOutputStream.getFileName(testPath));
SeaweedInputStream inputStream = new SeaweedInputStream(filerClient, testPath, entry);
byte[] buffer = new byte[1024];
int bytesRead = inputStream.read(buffer);
inputStream.close();
String expected = String.join("", chunks);
String actual = new String(buffer, 0, bytesRead, StandardCharsets.UTF_8);
assertEquals("Content should match", expected, actual);
}
@ -185,31 +181,30 @@ public class SeaweedStreamIntegrationTest {
System.out.println("Skipping test - SEAWEEDFS_TEST_ENABLED not set");
return;
}
String testPath = TEST_ROOT + "/offset.txt";
String testContent = "0123456789ABCDEFGHIJ";
// Write file
SeaweedOutputStream outputStream = new SeaweedOutputStream(filerClient, testPath);
outputStream.write(testContent.getBytes(StandardCharsets.UTF_8));
outputStream.close();
// Read with offset
FilerProto.Entry entry = filerClient.lookupEntry(
SeaweedOutputStream.getParentDirectory(testPath),
SeaweedOutputStream.getFileName(testPath)
);
SeaweedOutputStream.getParentDirectory(testPath),
SeaweedOutputStream.getFileName(testPath));
SeaweedInputStream inputStream = new SeaweedInputStream(filerClient, testPath, entry);
inputStream.seek(10); // Skip first 10 bytes
byte[] buffer = new byte[10];
int bytesRead = inputStream.read(buffer);
inputStream.close();
assertEquals("Should read 10 bytes", 10, bytesRead);
assertEquals("Should read from offset", "ABCDEFGHIJ",
new String(buffer, StandardCharsets.UTF_8));
assertEquals("Should read from offset", "ABCDEFGHIJ",
new String(buffer, StandardCharsets.UTF_8));
}
@Test
@ -218,32 +213,31 @@ public class SeaweedStreamIntegrationTest {
System.out.println("Skipping test - SEAWEEDFS_TEST_ENABLED not set");
return;
}
String testPath = TEST_ROOT + "/partial.txt";
String testContent = "The quick brown fox jumps over the lazy dog";
// Write file
SeaweedOutputStream outputStream = new SeaweedOutputStream(filerClient, testPath);
outputStream.write(testContent.getBytes(StandardCharsets.UTF_8));
outputStream.close();
// Read partial
FilerProto.Entry entry = filerClient.lookupEntry(
SeaweedOutputStream.getParentDirectory(testPath),
SeaweedOutputStream.getFileName(testPath)
);
SeaweedOutputStream.getParentDirectory(testPath),
SeaweedOutputStream.getFileName(testPath));
SeaweedInputStream inputStream = new SeaweedInputStream(filerClient, testPath, entry);
// Read only "quick brown"
inputStream.seek(4);
byte[] buffer = new byte[11];
int bytesRead = inputStream.read(buffer);
inputStream.close();
assertEquals("Should read 11 bytes", 11, bytesRead);
assertEquals("Should read partial content", "quick brown",
new String(buffer, StandardCharsets.UTF_8));
assertEquals("Should read partial content", "quick brown",
new String(buffer, StandardCharsets.UTF_8));
}
@Test
@ -252,28 +246,27 @@ public class SeaweedStreamIntegrationTest {
System.out.println("Skipping test - SEAWEEDFS_TEST_ENABLED not set");
return;
}
String testPath = TEST_ROOT + "/empty.txt";
// Write empty file
SeaweedOutputStream outputStream = new SeaweedOutputStream(filerClient, testPath);
outputStream.close();
// Verify file exists
assertTrue("File should exist", filerClient.exists(testPath));
// Read empty file
FilerProto.Entry entry = filerClient.lookupEntry(
SeaweedOutputStream.getParentDirectory(testPath),
SeaweedOutputStream.getFileName(testPath)
);
SeaweedOutputStream.getParentDirectory(testPath),
SeaweedOutputStream.getFileName(testPath));
assertNotNull("Entry should not be null", entry);
SeaweedInputStream inputStream = new SeaweedInputStream(filerClient, testPath, entry);
byte[] buffer = new byte[100];
int bytesRead = inputStream.read(buffer);
inputStream.close();
assertEquals("Should read 0 bytes from empty file", -1, bytesRead);
}
@ -283,32 +276,31 @@ public class SeaweedStreamIntegrationTest {
System.out.println("Skipping test - SEAWEEDFS_TEST_ENABLED not set");
return;
}
String testPath = TEST_ROOT + "/overwrite.txt";
String originalContent = "Original content";
String newContent = "New content that overwrites the original";
// Write original file
SeaweedOutputStream outputStream = new SeaweedOutputStream(filerClient, testPath);
outputStream.write(originalContent.getBytes(StandardCharsets.UTF_8));
outputStream.close();
// Overwrite file
outputStream = new SeaweedOutputStream(filerClient, testPath);
outputStream.write(newContent.getBytes(StandardCharsets.UTF_8));
outputStream.close();
// Read and verify
FilerProto.Entry entry = filerClient.lookupEntry(
SeaweedOutputStream.getParentDirectory(testPath),
SeaweedOutputStream.getFileName(testPath)
);
SeaweedOutputStream.getParentDirectory(testPath),
SeaweedOutputStream.getFileName(testPath));
SeaweedInputStream inputStream = new SeaweedInputStream(filerClient, testPath, entry);
byte[] buffer = new byte[1024];
int bytesRead = inputStream.read(buffer);
inputStream.close();
String actual = new String(buffer, 0, bytesRead, StandardCharsets.UTF_8);
assertEquals("Should have new content", newContent, actual);
}
@ -319,23 +311,22 @@ public class SeaweedStreamIntegrationTest {
System.out.println("Skipping test - SEAWEEDFS_TEST_ENABLED not set");
return;
}
String testPath = TEST_ROOT + "/multireads.txt";
String testContent = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
// Write file
SeaweedOutputStream outputStream = new SeaweedOutputStream(filerClient, testPath);
outputStream.write(testContent.getBytes(StandardCharsets.UTF_8));
outputStream.close();
// Read in multiple small chunks
FilerProto.Entry entry = filerClient.lookupEntry(
SeaweedOutputStream.getParentDirectory(testPath),
SeaweedOutputStream.getFileName(testPath)
);
SeaweedOutputStream.getParentDirectory(testPath),
SeaweedOutputStream.getFileName(testPath));
SeaweedInputStream inputStream = new SeaweedInputStream(filerClient, testPath, entry);
StringBuilder result = new StringBuilder();
byte[] buffer = new byte[5];
int bytesRead;
@ -343,7 +334,7 @@ public class SeaweedStreamIntegrationTest {
result.append(new String(buffer, 0, bytesRead, StandardCharsets.UTF_8));
}
inputStream.close();
assertEquals("Should read entire content", testContent, result.toString());
}
@ -353,29 +344,28 @@ public class SeaweedStreamIntegrationTest {
System.out.println("Skipping test - SEAWEEDFS_TEST_ENABLED not set");
return;
}
String testPath = TEST_ROOT + "/binary.bin";
byte[] binaryData = new byte[256];
for (int i = 0; i < 256; i++) {
binaryData[i] = (byte) i;
}
// Write binary file
SeaweedOutputStream outputStream = new SeaweedOutputStream(filerClient, testPath);
outputStream.write(binaryData);
outputStream.close();
// Read and verify
FilerProto.Entry entry = filerClient.lookupEntry(
SeaweedOutputStream.getParentDirectory(testPath),
SeaweedOutputStream.getFileName(testPath)
);
SeaweedOutputStream.getParentDirectory(testPath),
SeaweedOutputStream.getFileName(testPath));
SeaweedInputStream inputStream = new SeaweedInputStream(filerClient, testPath, entry);
byte[] readData = new byte[256];
int bytesRead = inputStream.read(readData);
inputStream.close();
assertEquals("Should read all bytes", 256, bytesRead);
assertArrayEquals("Binary data should match", binaryData, readData);
}
@ -386,32 +376,31 @@ public class SeaweedStreamIntegrationTest {
System.out.println("Skipping test - SEAWEEDFS_TEST_ENABLED not set");
return;
}
String testPath = TEST_ROOT + "/flush.txt";
String testContent = "Content to flush";
// Write file with flush
SeaweedOutputStream outputStream = new SeaweedOutputStream(filerClient, testPath);
outputStream.write(testContent.getBytes(StandardCharsets.UTF_8));
outputStream.flush(); // Explicitly flush
outputStream.close();
// Verify file was written
assertTrue("File should exist after flush", filerClient.exists(testPath));
// Read and verify
FilerProto.Entry entry = filerClient.lookupEntry(
SeaweedOutputStream.getParentDirectory(testPath),
SeaweedOutputStream.getFileName(testPath)
);
SeaweedOutputStream.getParentDirectory(testPath),
SeaweedOutputStream.getFileName(testPath));
SeaweedInputStream inputStream = new SeaweedInputStream(filerClient, testPath, entry);
byte[] buffer = new byte[testContent.length()];
int bytesRead = inputStream.read(buffer);
inputStream.close();
assertEquals("Content should match", testContent,
new String(buffer, 0, bytesRead, StandardCharsets.UTF_8));
assertEquals("Content should match", testContent,
new String(buffer, 0, bytesRead, StandardCharsets.UTF_8));
}
/**
@ -430,83 +419,83 @@ public class SeaweedStreamIntegrationTest {
System.out.println("Skipping test - SEAWEEDFS_TEST_ENABLED not set");
return;
}
String testPath = TEST_ROOT + "/rangereads.dat";
// Create a 1275-byte file (similar to the Parquet file size that was failing)
byte[] testData = new byte[1275];
Random random = new Random(42); // Fixed seed for reproducibility
random.nextBytes(testData);
// Write file
SeaweedOutputStream outputStream = new SeaweedOutputStream(filerClient, testPath);
outputStream.write(testData);
outputStream.close();
// Read file entry
FilerProto.Entry entry = filerClient.lookupEntry(
SeaweedOutputStream.getParentDirectory(testPath),
SeaweedOutputStream.getFileName(testPath)
);
SeaweedOutputStream.getParentDirectory(testPath),
SeaweedOutputStream.getFileName(testPath));
// Test 1: Read last 8 bytes (like reading Parquet footer length)
SeaweedInputStream inputStream = new SeaweedInputStream(filerClient, testPath, entry);
inputStream.seek(1267);
byte[] buffer = new byte[8];
int bytesRead = inputStream.read(buffer, 0, 8);
assertEquals("Should read 8 bytes at offset 1267", 8, bytesRead);
assertArrayEquals("Content at offset 1267 should match",
Arrays.copyOfRange(testData, 1267, 1275), buffer);
assertArrayEquals("Content at offset 1267 should match",
Arrays.copyOfRange(testData, 1267, 1275), buffer);
inputStream.close();
// Test 2: Read large chunk in middle (like reading column data)
inputStream = new SeaweedInputStream(filerClient, testPath, entry);
inputStream.seek(383);
buffer = new byte[884]; // Read bytes 383-1267
bytesRead = inputStream.read(buffer, 0, 884);
assertEquals("Should read 884 bytes at offset 383", 884, bytesRead);
assertArrayEquals("Content at offset 383 should match",
Arrays.copyOfRange(testData, 383, 1267), buffer);
assertArrayEquals("Content at offset 383 should match",
Arrays.copyOfRange(testData, 383, 1267), buffer);
inputStream.close();
// Test 3: Read from beginning (like reading Parquet magic bytes)
inputStream = new SeaweedInputStream(filerClient, testPath, entry);
buffer = new byte[4];
bytesRead = inputStream.read(buffer, 0, 4);
assertEquals("Should read 4 bytes at offset 0", 4, bytesRead);
assertArrayEquals("Content at offset 0 should match",
Arrays.copyOfRange(testData, 0, 4), buffer);
assertArrayEquals("Content at offset 0 should match",
Arrays.copyOfRange(testData, 0, 4), buffer);
inputStream.close();
// Test 4: Multiple sequential reads without seeking (like H2SeekableInputStream.readFully)
// Test 4: Multiple sequential reads without seeking (like
// H2SeekableInputStream.readFully)
// This is the critical test case that was failing!
inputStream = new SeaweedInputStream(filerClient, testPath, entry);
inputStream.seek(1197); // Position where EOF was being returned prematurely
byte[] fullBuffer = new byte[78]; // Try to read the "missing" 78 bytes
int totalRead = 0;
int offset = 0;
int remaining = 78;
// Simulate Parquet's H2SeekableInputStream.readFully() loop
while (remaining > 0) {
int read = inputStream.read(fullBuffer, offset, remaining);
if (read == -1) {
fail(String.format(
"Got EOF after reading %d bytes, but expected to read %d more bytes (total requested: 78)",
totalRead, remaining));
"Got EOF after reading %d bytes, but expected to read %d more bytes (total requested: 78)",
totalRead, remaining));
}
assertTrue("Each read() should return positive bytes", read > 0);
totalRead += read;
offset += read;
remaining -= read;
}
assertEquals("Should read all 78 bytes in readFully loop", 78, totalRead);
assertArrayEquals("Content at offset 1197 should match",
Arrays.copyOfRange(testData, 1197, 1275), fullBuffer);
assertArrayEquals("Content at offset 1197 should match",
Arrays.copyOfRange(testData, 1197, 1275), fullBuffer);
inputStream.close();
// Test 5: Read entire file in one go
inputStream = new SeaweedInputStream(filerClient, testPath, entry);
byte[] allData = new byte[1275];
@ -516,4 +505,3 @@ public class SeaweedStreamIntegrationTest {
inputStream.close();
}
}

78
other/java/hdfs3/src/main/java/seaweed/hdfs/SeaweedFileSystemStore.java
View File

@ -59,19 +59,18 @@ public class SeaweedFileSystemStore {
}
public boolean createDirectory(final Path path, UserGroupInformation currentUser,
final FsPermission permission, final FsPermission umask) {
final FsPermission permission, final FsPermission umask) {
LOG.debug("createDirectory path: {} permission: {} umask: {}",
path,
permission,
umask);
path,
permission,
umask);
return filerClient.mkdirs(
path.toUri().getPath(),
permissionToMode(permission, true),
currentUser.getUserName(),
currentUser.getGroupNames()
);
path.toUri().getPath(),
permissionToMode(permission, true),
currentUser.getUserName(),
currentUser.getGroupNames());
}
public FileStatus[] listEntries(final Path path) throws IOException {
@ -84,7 +83,7 @@ public class SeaweedFileSystemStore {
}
if (!pathStatus.isDirectory()) {
return new FileStatus[]{pathStatus};
return new FileStatus[] { pathStatus };
}
List<FileStatus> fileStatuses = new ArrayList<FileStatus>();
@ -116,9 +115,9 @@ public class SeaweedFileSystemStore {
public boolean deleteEntries(final Path path, boolean isDirectory, boolean recursive) {
LOG.debug("deleteEntries path: {} isDirectory {} recursive: {}",
path,
String.valueOf(isDirectory),
String.valueOf(recursive));
path,
String.valueOf(isDirectory),
String.valueOf(recursive));
if (path.isRoot()) {
return true;
@ -146,7 +145,7 @@ public class SeaweedFileSystemStore {
String owner = attributes.getUserName();
String group = attributes.getGroupNameCount() > 0 ? attributes.getGroupName(0) : "";
return new FileStatus(length, isDir, block_replication, blocksize,
modification_time, access_time, permission, owner, group, null, path);
modification_time, access_time, permission, owner, group, null, path);
}
public FilerProto.Entry lookupEntry(Path path) {
@ -172,19 +171,19 @@ public class SeaweedFileSystemStore {
}
public OutputStream createFile(final Path path,
final boolean overwrite,
FsPermission permission,
int bufferSize,
String replication) throws IOException {
final boolean overwrite,
FsPermission permission,
int bufferSize,
String replication) throws IOException {
permission = permission == null ? FsPermission.getFileDefault() : permission;
LOG.warn("[DEBUG-2024] SeaweedFileSystemStore.createFile CALLED: path={} overwrite={} bufferSize={}",
path, overwrite, bufferSize);
LOG.warn("[DEBUG-2024] SeaweedFileSystemStore.createFile CALLED: path={} overwrite={} bufferSize={}",
path, overwrite, bufferSize);
LOG.debug("createFile path: {} overwrite: {} permission: {}",
path,
overwrite,
permission.toString());
path,
overwrite,
permission.toString());
UserGroupInformation userGroupInformation = UserGroupInformation.getCurrentUser();
long now = System.currentTimeMillis() / 1000L;
@ -205,22 +204,23 @@ public class SeaweedFileSystemStore {
}
if (entry == null) {
entry = FilerProto.Entry.newBuilder()
.setName(path.getName())
.setIsDirectory(false)
.setAttributes(FilerProto.FuseAttributes.newBuilder()
.setFileMode(permissionToMode(permission, false))
.setCrtime(now)
.setMtime(now)
.setUserName(userGroupInformation.getUserName())
.clearGroupName()
.addAllGroupName(Arrays.asList(userGroupInformation.getGroupNames()))
);
.setName(path.getName())
.setIsDirectory(false)
.setAttributes(FilerProto.FuseAttributes.newBuilder()
.setFileMode(permissionToMode(permission, false))
.setCrtime(now)
.setMtime(now)
.setUserName(userGroupInformation.getUserName())
.clearGroupName()
.addAllGroupName(Arrays.asList(userGroupInformation.getGroupNames())));
SeaweedWrite.writeMeta(filerClient, getParentDirectory(path), entry);
}
LOG.warn("[DEBUG-2024] SeaweedFileSystemStore.createFile RETURNING SeaweedHadoopOutputStream: path={} bufferSize={}",
path, bufferSize);
return new SeaweedHadoopOutputStream(filerClient, path.toString(), entry, writePosition, bufferSize, replication);
LOG.warn(
"[DEBUG-2024] SeaweedFileSystemStore.createFile RETURNING SeaweedHadoopOutputStream: path={} bufferSize={}",
path, bufferSize);
return new SeaweedHadoopOutputStream(filerClient, path.toString(), entry, writePosition, bufferSize,
replication);
}
@ -235,9 +235,9 @@ public class SeaweedFileSystemStore {
}
return new SeaweedHadoopInputStream(filerClient,
statistics,
path.toUri().getPath(),
entry);
statistics,
path.toUri().getPath(),
entry);
}
public void setOwner(Path path, String owner, String group) {

2
other/java/hdfs3/src/main/java/seaweed/hdfs/SeaweedHadoopOutputStream.java
View File

@ -51,7 +51,7 @@ public class SeaweedHadoopOutputStream extends SeaweedOutputStream implements Sy
flushInternal();
}
}
private String getPath() {
// Access the path field from parent class for logging
return this.toString().contains("parquet") ? "parquet file" : "file";

222
test/java/spark/src/main/java/seaweed/spark/SparkSeaweedFSExample.java
View File

@ -23,116 +23,116 @@ import org.apache.spark.sql.SparkSession;
*/
public class SparkSeaweedFSExample {
public static void main(String[] args) {
if (args.length < 1) {
System.err.println("Usage: SparkSeaweedFSExample <output-path>");
System.err.println("Example: seaweedfs://localhost:8888/spark-output");
System.exit(1);
public static void main(String[] args) {
if (args.length < 1) {
System.err.println("Usage: SparkSeaweedFSExample <output-path>");
System.err.println("Example: seaweedfs://localhost:8888/spark-output");
System.exit(1);
}
String outputPath = args[0];
// Create Spark session
SparkSession spark = SparkSession.builder()
.appName("SeaweedFS Spark Example")
.getOrCreate();
try {
System.out.println("=== SeaweedFS Spark Integration Example ===\n");
// Example 1: Generate data and write to SeaweedFS
System.out.println("1. Generating sample data...");
Dataset<Row> data = spark.range(0, 1000)
.selectExpr(
"id",
"id * 2 as doubled",
"CAST(rand() * 100 AS INT) as random_value");
System.out.println(" Generated " + data.count() + " rows");
data.show(5);
// Write as Parquet
String parquetPath = outputPath + "/data.parquet";
System.out.println("\n2. Writing data to SeaweedFS as Parquet...");
System.out.println(" Path: " + parquetPath);
data.write()
.mode(SaveMode.Overwrite)
.parquet(parquetPath);
System.out.println(" ✓ Write completed");
// Read back and verify
System.out.println("\n3. Reading data back from SeaweedFS...");
Dataset<Row> readData = spark.read().parquet(parquetPath);
System.out.println(" Read " + readData.count() + " rows");
// Perform aggregation
System.out.println("\n4. Performing aggregation...");
Dataset<Row> stats = readData.selectExpr(
"COUNT(*) as count",
"AVG(random_value) as avg_random",
"MAX(doubled) as max_doubled");
stats.show();
// Write aggregation results
String statsPath = outputPath + "/stats.parquet";
System.out.println("5. Writing stats to: " + statsPath);
stats.write()
.mode(SaveMode.Overwrite)
.parquet(statsPath);
// Create a partitioned dataset
System.out.println("\n6. Creating partitioned dataset...");
Dataset<Row> partitionedData = data.selectExpr(
"*",
"CAST(id % 10 AS INT) as partition_key");
String partitionedPath = outputPath + "/partitioned.parquet";
System.out.println(" Path: " + partitionedPath);
partitionedData.write()
.mode(SaveMode.Overwrite)
.partitionBy("partition_key")
.parquet(partitionedPath);
System.out.println(" ✓ Partitioned write completed");
// Read specific partition
System.out.println("\n7. Reading specific partition (partition_key=0)...");
Dataset<Row> partition0 = spark.read()
.parquet(partitionedPath)
.filter("partition_key = 0");
System.out.println(" Partition 0 contains " + partition0.count() + " rows");
partition0.show(5);
// SQL example
System.out.println("\n8. Using Spark SQL...");
readData.createOrReplaceTempView("seaweedfs_data");
Dataset<Row> sqlResult = spark.sql(
"SELECT " +
" CAST(id / 100 AS INT) as bucket, " +
" COUNT(*) as count, " +
" AVG(random_value) as avg_random " +
"FROM seaweedfs_data " +
"GROUP BY CAST(id / 100 AS INT) " +
"ORDER BY bucket");
System.out.println(" Bucketed statistics:");
sqlResult.show();
System.out.println("\n=== Example completed successfully! ===");
System.out.println("Output location: " + outputPath);
} catch (Exception e) {
System.err.println("Error: " + e.getMessage());
e.printStackTrace();
System.exit(1);
} finally {
spark.stop();
}
}
String outputPath = args[0];
// Create Spark session
SparkSession spark = SparkSession.builder()
.appName("SeaweedFS Spark Example")
.getOrCreate();
try {
System.out.println("=== SeaweedFS Spark Integration Example ===\n");
// Example 1: Generate data and write to SeaweedFS
System.out.println("1. Generating sample data...");
Dataset<Row> data = spark.range(0, 1000)
.selectExpr(
"id",
"id * 2 as doubled",
"CAST(rand() * 100 AS INT) as random_value");
System.out.println(" Generated " + data.count() + " rows");
data.show(5);
// Write as Parquet
String parquetPath = outputPath + "/data.parquet";
System.out.println("\n2. Writing data to SeaweedFS as Parquet...");
System.out.println(" Path: " + parquetPath);
data.write()
.mode(SaveMode.Overwrite)
.parquet(parquetPath);
System.out.println(" ✓ Write completed");
// Read back and verify
System.out.println("\n3. Reading data back from SeaweedFS...");
Dataset<Row> readData = spark.read().parquet(parquetPath);
System.out.println(" Read " + readData.count() + " rows");
// Perform aggregation
System.out.println("\n4. Performing aggregation...");
Dataset<Row> stats = readData.selectExpr(
"COUNT(*) as count",
"AVG(random_value) as avg_random",
"MAX(doubled) as max_doubled");
stats.show();
// Write aggregation results
String statsPath = outputPath + "/stats.parquet";
System.out.println("5. Writing stats to: " + statsPath);
stats.write()
.mode(SaveMode.Overwrite)
.parquet(statsPath);
// Create a partitioned dataset
System.out.println("\n6. Creating partitioned dataset...");
Dataset<Row> partitionedData = data.selectExpr(
"*",
"CAST(id % 10 AS INT) as partition_key");
String partitionedPath = outputPath + "/partitioned.parquet";
System.out.println(" Path: " + partitionedPath);
partitionedData.write()
.mode(SaveMode.Overwrite)
.partitionBy("partition_key")
.parquet(partitionedPath);
System.out.println(" ✓ Partitioned write completed");
// Read specific partition
System.out.println("\n7. Reading specific partition (partition_key=0)...");
Dataset<Row> partition0 = spark.read()
.parquet(partitionedPath)
.filter("partition_key = 0");
System.out.println(" Partition 0 contains " + partition0.count() + " rows");
partition0.show(5);
// SQL example
System.out.println("\n8. Using Spark SQL...");
readData.createOrReplaceTempView("seaweedfs_data");
Dataset<Row> sqlResult = spark.sql(
"SELECT " +
" CAST(id / 100 AS INT) as bucket, " +
" COUNT(*) as count, " +
" AVG(random_value) as avg_random " +
"FROM seaweedfs_data " +
"GROUP BY CAST(id / 100 AS INT) " +
"ORDER BY bucket");
System.out.println(" Bucketed statistics:");
sqlResult.show();
System.out.println("\n=== Example completed successfully! ===");
System.out.println("Output location: " + outputPath);
} catch (Exception e) {
System.err.println("Error: " + e.getMessage());
e.printStackTrace();
System.exit(1);
} finally {
spark.stop();
}
}
}

123
test/java/spark/src/test/java/seaweed/spark/GetPosBufferTest.java
View File

@ -17,8 +17,10 @@ import static org.junit.Assert.*;
/**
* Unit test to reproduce the Parquet EOF issue.
*
* The issue: When Parquet writes column chunks, it calls getPos() to record offsets.
* If getPos() returns a position that doesn't include buffered (unflushed) data,
* The issue: When Parquet writes column chunks, it calls getPos() to record
* offsets.
* If getPos() returns a position that doesn't include buffered (unflushed)
* data,
* the footer metadata will have incorrect offsets.
*
* This test simulates Parquet's behavior:
@ -42,8 +44,7 @@ public class GetPosBufferTest {
private FilerClient filerClient;
private static final String TEST_ROOT = "/test-getpos-buffer";
private static final boolean TESTS_ENABLED =
"true".equalsIgnoreCase(System.getenv("SEAWEEDFS_TEST_ENABLED"));
private static final boolean TESTS_ENABLED = "true".equalsIgnoreCase(System.getenv("SEAWEEDFS_TEST_ENABLED"));
@Before
public void setUp() throws Exception {
@ -53,7 +54,7 @@ public class GetPosBufferTest {
String filerHost = System.getenv().getOrDefault("SEAWEEDFS_FILER_HOST", "localhost");
String filerGrpcPort = System.getenv().getOrDefault("SEAWEEDFS_FILER_GRPC_PORT", "18888");
filerClient = new FilerClient(filerHost, Integer.parseInt(filerGrpcPort));
// Clean up any existing test directory
@ -84,66 +85,65 @@ public class GetPosBufferTest {
}
System.out.println("\n=== Testing getPos() with buffered data ===");
String testPath = TEST_ROOT + "/getpos-test.bin";
// Simulate what Parquet does when writing column chunks
SeaweedOutputStream outputStream = new SeaweedOutputStream(filerClient, testPath);
// Write "column chunk 1" - 100 bytes
byte[] chunk1 = new byte[100];
for (int i = 0; i < 100; i++) {
chunk1[i] = (byte) i;
}
outputStream.write(chunk1);
// Parquet calls getPos() here to record end of chunk 1
long posAfterChunk1 = outputStream.getPos();
System.out.println("Position after chunk 1 (100 bytes): " + posAfterChunk1);
assertEquals("getPos() should return 100 after writing 100 bytes", 100, posAfterChunk1);
// Write "column chunk 2" - 200 bytes
byte[] chunk2 = new byte[200];
for (int i = 0; i < 200; i++) {
chunk2[i] = (byte) (i + 100);
}
outputStream.write(chunk2);
// Parquet calls getPos() here to record end of chunk 2
long posAfterChunk2 = outputStream.getPos();
System.out.println("Position after chunk 2 (200 more bytes): " + posAfterChunk2);
assertEquals("getPos() should return 300 after writing 300 bytes total", 300, posAfterChunk2);
// Write "column chunk 3" - small chunk of 78 bytes (the problematic size!)
byte[] chunk3 = new byte[78];
for (int i = 0; i < 78; i++) {
chunk3[i] = (byte) (i + 50);
}
outputStream.write(chunk3);
// Parquet calls getPos() here to record end of chunk 3
long posAfterChunk3 = outputStream.getPos();
System.out.println("Position after chunk 3 (78 more bytes): " + posAfterChunk3);
assertEquals("getPos() should return 378 after writing 378 bytes total", 378, posAfterChunk3);
// Close to flush everything
outputStream.close();
System.out.println("File closed successfully");
// Now read the file and verify its actual size matches what getPos() reported
FilerProto.Entry entry = filerClient.lookupEntry(
SeaweedOutputStream.getParentDirectory(testPath),
SeaweedOutputStream.getFileName(testPath)
);
SeaweedOutputStream.getFileName(testPath));
long actualFileSize = SeaweedRead.fileSize(entry);
System.out.println("Actual file size on disk: " + actualFileSize);
assertEquals("File size should match the last getPos() value", 378, actualFileSize);
// Now read the file and verify we can read all the data
SeaweedInputStream inputStream = new SeaweedInputStream(filerClient, testPath, entry);
byte[] readBuffer = new byte[500]; // Larger buffer to read everything
int totalRead = 0;
int bytesRead;
@ -151,10 +151,10 @@ public class GetPosBufferTest {
totalRead += bytesRead;
}
inputStream.close();
System.out.println("Total bytes read: " + totalRead);
assertEquals("Should read exactly 378 bytes", 378, totalRead);
// Verify the data is correct
for (int i = 0; i < 100; i++) {
assertEquals("Chunk 1 data mismatch at byte " + i, (byte) i, readBuffer[i]);
@ -165,7 +165,7 @@ public class GetPosBufferTest {
for (int i = 0; i < 78; i++) {
assertEquals("Chunk 3 data mismatch at byte " + (300 + i), (byte) (i + 50), readBuffer[300 + i]);
}
System.out.println("SUCCESS: All data verified correctly!\n");
}
@ -177,61 +177,60 @@ public class GetPosBufferTest {
}
System.out.println("\n=== Testing getPos() with many small writes (Parquet pattern) ===");
String testPath = TEST_ROOT + "/small-writes-test.bin";
SeaweedOutputStream outputStream = new SeaweedOutputStream(filerClient, testPath);
// Parquet writes column data in small chunks and frequently calls getPos()
String[] columnData = {"Alice", "Bob", "Charlie", "David"};
String[] columnData = { "Alice", "Bob", "Charlie", "David" };
long[] recordedPositions = new long[columnData.length];
for (int i = 0; i < columnData.length; i++) {
byte[] data = columnData[i].getBytes(StandardCharsets.UTF_8);
outputStream.write(data);
// Parquet calls getPos() after each value to track offsets
recordedPositions[i] = outputStream.getPos();
System.out.println("After writing '" + columnData[i] + "': pos=" + recordedPositions[i]);
}
long finalPos = outputStream.getPos();
System.out.println("Final position before close: " + finalPos);
outputStream.close();
// Verify file size
FilerProto.Entry entry = filerClient.lookupEntry(
SeaweedOutputStream.getParentDirectory(testPath),
SeaweedOutputStream.getFileName(testPath)
);
SeaweedOutputStream.getFileName(testPath));
long actualFileSize = SeaweedRead.fileSize(entry);
System.out.println("Actual file size: " + actualFileSize);
assertEquals("File size should match final getPos()", finalPos, actualFileSize);
// Verify we can read using the recorded positions
SeaweedInputStream inputStream = new SeaweedInputStream(filerClient, testPath, entry);
long currentPos = 0;
for (int i = 0; i < columnData.length; i++) {
long nextPos = recordedPositions[i];
int length = (int) (nextPos - currentPos);
byte[] buffer = new byte[length];
int bytesRead = inputStream.read(buffer, 0, length);
assertEquals("Should read " + length + " bytes for '" + columnData[i] + "'", length, bytesRead);
String readData = new String(buffer, 0, bytesRead, StandardCharsets.UTF_8);
System.out.println("Read at offset " + currentPos + ": '" + readData + "'");
assertEquals("Data mismatch", columnData[i], readData);
currentPos = nextPos;
}
inputStream.close();
System.out.println("SUCCESS: Small writes with getPos() tracking work correctly!\n");
}
@ -243,11 +242,11 @@ public class GetPosBufferTest {
}
System.out.println("\n=== Testing getPos() with EXACTLY 78 bytes buffered (the bug size!) ===");
String testPath = TEST_ROOT + "/78-bytes-test.bin";
SeaweedOutputStream outputStream = new SeaweedOutputStream(filerClient, testPath);
// Write some initial data
byte[] initial = new byte[1000];
for (int i = 0; i < 1000; i++) {
@ -255,57 +254,55 @@ public class GetPosBufferTest {
}
outputStream.write(initial);
outputStream.flush(); // Ensure this is flushed
long posAfterFlush = outputStream.getPos();
System.out.println("Position after 1000 bytes + flush: " + posAfterFlush);
assertEquals("Should be at position 1000 after flush", 1000, posAfterFlush);
// Now write EXACTLY 78 bytes (the problematic buffer size in our bug)
byte[] problematicChunk = new byte[78];
for (int i = 0; i < 78; i++) {
problematicChunk[i] = (byte) (i + 50);
}
outputStream.write(problematicChunk);
// DO NOT FLUSH - this is the bug scenario!
// Parquet calls getPos() here while the 78 bytes are still buffered
long posWithBufferedData = outputStream.getPos();
System.out.println("Position with 78 bytes BUFFERED (not flushed): " + posWithBufferedData);
// This MUST return 1078, not 1000!
assertEquals("getPos() MUST include buffered data", 1078, posWithBufferedData);
// Now close (which will flush)
outputStream.close();
// Verify actual file size
FilerProto.Entry entry = filerClient.lookupEntry(
SeaweedOutputStream.getParentDirectory(testPath),
SeaweedOutputStream.getFileName(testPath)
);
SeaweedOutputStream.getFileName(testPath));
long actualFileSize = SeaweedRead.fileSize(entry);
System.out.println("Actual file size: " + actualFileSize);
assertEquals("File size must be 1078", 1078, actualFileSize);
// Try to read at position 1000 for 78 bytes (what Parquet would try)
SeaweedInputStream inputStream = new SeaweedInputStream(filerClient, testPath, entry);
inputStream.seek(1000);
byte[] readBuffer = new byte[78];
int bytesRead = inputStream.read(readBuffer, 0, 78);
System.out.println("Bytes read at position 1000: " + bytesRead);
assertEquals("Should successfully read 78 bytes at position 1000", 78, bytesRead);
// Verify the data matches
for (int i = 0; i < 78; i++) {
assertEquals("Data mismatch at byte " + i, problematicChunk[i], readBuffer[i]);
}
inputStream.close();
System.out.println("SUCCESS: getPos() correctly includes buffered data!\n");
}
}

388
test/java/spark/src/test/java/seaweed/spark/ParquetOperationComparisonTest.java
View File

@ -0,0 +1,388 @@
package seaweed.spark;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.parquet.example.data.Group;
import org.apache.parquet.example.data.simple.SimpleGroupFactory;
import org.apache.parquet.hadoop.ParquetWriter;
import org.apache.parquet.hadoop.example.GroupWriteSupport;
import org.apache.parquet.schema.MessageType;
import org.apache.parquet.schema.MessageTypeParser;
import org.junit.Test;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.List;
/**
* Detailed comparison of InputStream/OutputStream operations between
* local filesystem and SeaweedFS during Parquet file writing.
*
* This test intercepts and logs every read/write/getPos operation to
* identify exactly where the behavior diverges.
*/
public class ParquetOperationComparisonTest extends SparkTestBase {
private static final String SCHEMA_STRING =
"message Employee { " +
" required int32 id; " +
" required binary name (UTF8); " +
" required int32 age; " +
"}";
private static final MessageType SCHEMA = MessageTypeParser.parseMessageType(SCHEMA_STRING);
// Track all operations for comparison
private static class OperationLog {
List<String> operations = new ArrayList<>();
void log(String op) {
operations.add(op);
System.out.println(" " + op);
}
void print(String title) {
System.out.println("\n" + title + " (" + operations.size() + " operations):");
for (int i = 0; i < operations.size(); i++) {
System.out.printf(" [%3d] %s\n", i, operations.get(i));
}
}
void compare(OperationLog other, String name1, String name2) {
System.out.println("\n=== COMPARISON: " + name1 + " vs " + name2 + " ===");
int maxLen = Math.max(operations.size(), other.operations.size());
int differences = 0;
for (int i = 0; i < maxLen; i++) {
String op1 = i < operations.size() ? operations.get(i) : "<missing>";
String op2 = i < other.operations.size() ? other.operations.get(i) : "<missing>";
if (!op1.equals(op2)) {
differences++;
System.out.printf("[%3d] DIFF:\n", i);
System.out.println(" " + name1 + ": " + op1);
System.out.println(" " + name2 + ": " + op2);
}
}
if (differences == 0) {
System.out.println("✅ Operations are IDENTICAL!");
} else {
System.out.println("❌ Found " + differences + " differences");
}
}
}
// Wrapper for FSDataOutputStream that logs all operations
private static class LoggingOutputStream extends FSDataOutputStream {
private final FSDataOutputStream delegate;
private final OperationLog log;
private final String name;
public LoggingOutputStream(FSDataOutputStream delegate, OperationLog log, String name) throws IOException {
super(delegate.getWrappedStream(), null);
this.delegate = delegate;
this.log = log;
this.name = name;
log.log(name + " CREATED");
}
@Override
public void write(int b) throws IOException {
log.log(String.format("write(byte) pos=%d", getPos()));
delegate.write(b);
}
@Override
public void write(byte[] b, int off, int len) throws IOException {
long posBefore = getPos();
delegate.write(b, off, len);
long posAfter = getPos();
log.log(String.format("write(%d bytes) pos %d→%d", len, posBefore, posAfter));
}
@Override
public long getPos() {
long pos = delegate.getPos();
// Don't log getPos itself to avoid infinite recursion, but track it
return pos;
}
@Override
public void flush() throws IOException {
log.log(String.format("flush() pos=%d", getPos()));
delegate.flush();
}
@Override
public void close() throws IOException {
log.log(String.format("close() pos=%d", getPos()));
delegate.close();
}
@Override
public void hflush() throws IOException {
log.log(String.format("hflush() pos=%d", getPos()));
delegate.hflush();
}
@Override
public void hsync() throws IOException {
log.log(String.format("hsync() pos=%d", getPos()));
delegate.hsync();
}
}
// Wrapper for FSDataInputStream that logs all operations
private static class LoggingInputStream extends FSDataInputStream {
private final OperationLog log;
private final String name;
public LoggingInputStream(FSDataInputStream delegate, OperationLog log, String name) throws IOException {
super(delegate);
this.log = log;
this.name = name;
log.log(name + " CREATED");
}
@Override
public int read() throws IOException {
long posBefore = getPos();
int result = super.read();
log.log(String.format("read() pos %d→%d result=%d", posBefore, getPos(), result));
return result;
}
// Can't override read(byte[], int, int) as it's final in DataInputStream
// The logging will happen through read(ByteBuffer) which is what Parquet uses
@Override
public int read(ByteBuffer buf) throws IOException {
long posBefore = getPos();
int result = super.read(buf);
log.log(String.format("read(ByteBuffer %d) pos %d→%d result=%d", buf.remaining(), posBefore, getPos(), result));
return result;
}
@Override
public void seek(long pos) throws IOException {
long posBefore = getPos();
super.seek(pos);
log.log(String.format("seek(%d) pos %d→%d", pos, posBefore, getPos()));
}
@Override
public void close() throws IOException {
log.log(String.format("close() pos=%d", getPos()));
super.close();
}
}
@Test
public void testCompareWriteOperations() throws Exception {
if (!TESTS_ENABLED) {
System.out.println("Skipping test - SEAWEEDFS_TEST_ENABLED not set");
return;
}
System.out.println("\n╔══════════════════════════════════════════════════════════════╗");
System.out.println("║ PARQUET WRITE OPERATION COMPARISON TEST ║");
System.out.println("╚══════════════════════════════════════════════════════════════╝\n");
// Setup filesystems
Configuration localConf = new Configuration();
FileSystem localFs = FileSystem.getLocal(localConf);
Configuration seaweedConf = new Configuration();
seaweedConf.set("fs.seaweedfs.impl", "seaweed.hdfs.SeaweedFileSystem");
seaweedConf.set("fs.seaweed.filer.host", SEAWEEDFS_HOST);
seaweedConf.set("fs.seaweed.filer.port", SEAWEEDFS_PORT);
FileSystem seaweedFs = FileSystem.get(
java.net.URI.create("seaweedfs://" + SEAWEEDFS_HOST + ":" + SEAWEEDFS_PORT),
seaweedConf);
Path localPath = new Path("/tmp/test-local-ops-" + System.currentTimeMillis() + ".parquet");
Path seaweedPath = new Path("seaweedfs://" + SEAWEEDFS_HOST + ":" + SEAWEEDFS_PORT +
"/test-spark/ops-test.parquet");
OperationLog localLog = new OperationLog();
OperationLog seaweedLog = new OperationLog();
// Write to local filesystem with logging
System.out.println("=== Writing to LOCAL filesystem ===");
writeParquetWithLogging(localFs, localPath, localConf, localLog, "LOCAL");
System.out.println("\n=== Writing to SEAWEEDFS ===");
writeParquetWithLogging(seaweedFs, seaweedPath, seaweedConf, seaweedLog, "SEAWEED");
// Print logs
localLog.print("LOCAL OPERATIONS");
seaweedLog.print("SEAWEEDFS OPERATIONS");
// Compare
localLog.compare(seaweedLog, "LOCAL", "SEAWEEDFS");
// Cleanup
localFs.delete(localPath, false);
seaweedFs.delete(seaweedPath, false);
localFs.close();
seaweedFs.close();
System.out.println("\n=== Test Complete ===");
}
@Test
public void testCompareReadOperations() throws Exception {
if (!TESTS_ENABLED) {
System.out.println("Skipping test - SEAWEEDFS_TEST_ENABLED not set");
return;
}
System.out.println("\n╔══════════════════════════════════════════════════════════════╗");
System.out.println("║ PARQUET READ OPERATION COMPARISON TEST ║");
System.out.println("╚══════════════════════════════════════════════════════════════╝\n");
// Setup filesystems
Configuration localConf = new Configuration();
FileSystem localFs = FileSystem.getLocal(localConf);
Configuration seaweedConf = new Configuration();
seaweedConf.set("fs.seaweedfs.impl", "seaweed.hdfs.SeaweedFileSystem");
seaweedConf.set("fs.seaweed.filer.host", SEAWEEDFS_HOST);
seaweedConf.set("fs.seaweed.filer.port", SEAWEEDFS_PORT);
FileSystem seaweedFs = FileSystem.get(
java.net.URI.create("seaweedfs://" + SEAWEEDFS_HOST + ":" + SEAWEEDFS_PORT),
seaweedConf);
Path localPath = new Path("/tmp/test-local-read-" + System.currentTimeMillis() + ".parquet");
Path seaweedPath = new Path("seaweedfs://" + SEAWEEDFS_HOST + ":" + SEAWEEDFS_PORT +
"/test-spark/read-test.parquet");
// First write files without logging
System.out.println("=== Writing test files ===");
writeParquetSimple(localFs, localPath, localConf);
writeParquetSimple(seaweedFs, seaweedPath, seaweedConf);
System.out.println("✅ Files written");
OperationLog localLog = new OperationLog();
OperationLog seaweedLog = new OperationLog();
// Read from local filesystem with logging
System.out.println("\n=== Reading from LOCAL filesystem ===");
readParquetWithLogging(localFs, localPath, localLog, "LOCAL");
System.out.println("\n=== Reading from SEAWEEDFS ===");
readParquetWithLogging(seaweedFs, seaweedPath, seaweedLog, "SEAWEED");
// Print logs
localLog.print("LOCAL READ OPERATIONS");
seaweedLog.print("SEAWEEDFS READ OPERATIONS");
// Compare
localLog.compare(seaweedLog, "LOCAL", "SEAWEEDFS");
// Cleanup
localFs.delete(localPath, false);
seaweedFs.delete(seaweedPath, false);
localFs.close();
seaweedFs.close();
System.out.println("\n=== Test Complete ===");
}
private void writeParquetWithLogging(FileSystem fs, Path path, Configuration conf,
OperationLog log, String name) throws IOException {
// We can't easily intercept ParquetWriter's internal stream usage,
// but we can log the file operations
log.log(name + " START WRITE");
GroupWriteSupport.setSchema(SCHEMA, conf);
try (ParquetWriter<Group> writer = org.apache.parquet.hadoop.example.ExampleParquetWriter.builder(path)
.withConf(conf)
.withWriteMode(org.apache.parquet.hadoop.ParquetFileWriter.Mode.OVERWRITE)
.build()) {
SimpleGroupFactory factory = new SimpleGroupFactory(SCHEMA);
log.log("WRITE ROW 1");
Group group1 = factory.newGroup()
.append("id", 1)
.append("name", "Alice")
.append("age", 30);
writer.write(group1);
log.log("WRITE ROW 2");
Group group2 = factory.newGroup()
.append("id", 2)
.append("name", "Bob")
.append("age", 25);
writer.write(group2);
log.log("WRITE ROW 3");
Group group3 = factory.newGroup()
.append("id", 3)
.append("name", "Charlie")
.append("age", 35);
writer.write(group3);
log.log("CLOSE WRITER");
}
// Check final file size
org.apache.hadoop.fs.FileStatus status = fs.getFileStatus(path);
log.log(String.format("FINAL FILE SIZE: %d bytes", status.getLen()));
}
private void writeParquetSimple(FileSystem fs, Path path, Configuration conf) throws IOException {
GroupWriteSupport.setSchema(SCHEMA, conf);
try (ParquetWriter<Group> writer = org.apache.parquet.hadoop.example.ExampleParquetWriter.builder(path)
.withConf(conf)
.withWriteMode(org.apache.parquet.hadoop.ParquetFileWriter.Mode.OVERWRITE)
.build()) {
SimpleGroupFactory factory = new SimpleGroupFactory(SCHEMA);
writer.write(factory.newGroup().append("id", 1).append("name", "Alice").append("age", 30));
writer.write(factory.newGroup().append("id", 2).append("name", "Bob").append("age", 25));
writer.write(factory.newGroup().append("id", 3).append("name", "Charlie").append("age", 35));
}
}
private void readParquetWithLogging(FileSystem fs, Path path, OperationLog log, String name) throws IOException {
log.log(name + " START READ");
// Read file in chunks to see the pattern
try (FSDataInputStream in = fs.open(path)) {
byte[] buffer = new byte[256];
int totalRead = 0;
int chunkNum = 0;
while (true) {
long posBefore = in.getPos();
int bytesRead = in.read(buffer);
if (bytesRead == -1) {
log.log(String.format("READ CHUNK %d: EOF at pos=%d", chunkNum, posBefore));
break;
}
totalRead += bytesRead;
log.log(String.format("READ CHUNK %d: %d bytes at pos %d→%d",
chunkNum, bytesRead, posBefore, in.getPos()));
chunkNum++;
}
log.log(String.format("TOTAL READ: %d bytes in %d chunks", totalRead, chunkNum));
}
}
}
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