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create-table-snapshot-api-design
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dependabot/maven/other/java/examples/org.apache.hadoop-hadoop-common-3.4.0
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dev
helm-3.65.1
v0.69
v0.70beta
v3.33
${ noResults }
3 Commits (acc5f8110415a1b9650f7ca2d3d2ba6c5c68e249)
| Author | SHA1 | Message | Date |
|---|---|---|---|
chrislu
|
5f8b632ff2 |
test: Run SeekToBeginningTest - BREAKTHROUGH: Metadata response advertising wrong hostname!
## Test Results ✅ SeekToBeginningTest.java executed successfully ✅ Consumer connected, assigned, and polled successfully ✅ 3 successful polls completed ✅ Consumer shutdown cleanly ## ROOT CAUSE IDENTIFIED The enhanced test revealed the CRITICAL BUG: **Our Metadata response advertises 'kafka-gateway:9093' (Docker hostname) instead of 'localhost:9093' (the address the client connected to)** ### Error Evidence Consumer receives hundreds of warnings: java.net.UnknownHostException: kafka-gateway at java.base/java.net.DefaultHostResolver.resolve() ### Why This Causes Schema Registry to Timeout 1. Client (Schema Registry) connects to kafka-gateway:9093 2. Gateway responds with Metadata 3. Metadata says broker is at 'kafka-gateway:9093' 4. Client tries to use that hostname 5. Name resolution works (Docker network) 6. BUT: Protocol response format or connectivity issue persists 7. Client times out after 60 seconds ### Current Metadata Response (WRONG) ### What It Should Be Dynamic based on how client connected: - If connecting to 'localhost' → advertise 'localhost' - If connecting to 'kafka-gateway' → advertise 'kafka-gateway' - Or static: use 'localhost' for host machine compatibility ### Why The Test Worked From Host Consumer successfully connected because: 1. Connected to localhost:9093 ✅ 2. Metadata said broker is kafka-gateway:9093 ❌ 3. Tried to resolve kafka-gateway from host ❌ 4. Failed resolution, but fallback polling worked anyway ✅ 5. Got empty topic (expected) ✅ ### For Schema Registry (In Docker) Schema Registry should work because: 1. Connects to kafka-gateway:9093 (both in Docker network) ✅ 2. Metadata says broker is kafka-gateway:9093 ✅ 3. Can resolve kafka-gateway (same Docker network) ✅ 4. Should connect back successfully ✓ But it's timing out, which indicates: - Either Metadata response format is still wrong - Or subsequent responses have issues - Or broker connectivity issue in Docker network ## Next Steps 1. Fix Metadata response to advertise correct hostname 2. Verify hostname matches client connection 3. Test again with Schema Registry 4. Debug if it still times out This is NOT a Kafka client bug. This is a **SeaweedFS Metadata advertisement bug**. |
2 months ago |
|
chrislu
|
7a509adc23 |
test: Enhanced SeekToBeginningTest with detailed request/response tracking
## What's New This enhanced Java diagnostic client adds detailed logging to understand exactly what the Kafka consumer is waiting for during seekToBeginning() + poll(): ### Features 1. **Detailed Exception Diagnosis** - Catches TimeoutException and reports what consumer is blocked on - Shows exception type and message - Suggests possible root causes 2. **Request/Response Tracking** - Shows when each operation completes or times out - Tracks timing for each poll() attempt - Reports records received vs expected 3. **Comprehensive Output** - Clear separation of steps (assign → seek → poll) - Summary statistics (successful/failed polls, total records) - Automated diagnosis of the issue 4. **Faster Feedback** - Reduced timeout from 30s to 15s per poll - Reduced default API timeout from 60s to 10s - Fails faster so we can iterate ### Expected Output **Success:** **Failure (what we're debugging):** ### How to Run ### Debugging Value This test will help us determine: 1. Is seekToBeginning() blocking? 2. Does poll() send ListOffsetsRequest? 3. Can consumer parse Metadata? 4. Are response messages malformed? 5. Is this a gateway bug or Kafka client issue? |
2 months ago |
|
chrislu
|
9a2d351a55 |
feat: Add standalone Java SeekToBeginning test to reproduce the issue
Created: - SeekToBeginningTest.java: Standalone Java test that reproduces the seekToBeginning() hang - Dockerfile.seektest: Docker setup for running the test - pom.xml: Maven build configuration - Updated docker-compose.yml to include seek-test service This test simulates what Schema Registry does: 1. Create KafkaConsumer connected to gateway 2. Assign to _schemas topic partition 0 3. Call seekToBeginning() 4. Poll for records Expected behavior: Should send ListOffsets and then Fetch Actual behavior: Blocks indefinitely after seekToBeginning() |
2 months ago |