Hadoop: printout the entry creation error message

other/java/client/src/main/java/seaweedfs/client/FilerClient.java

@@ -1,5 +1,6 @@
 package seaweedfs.client;
 
+import com.google.common.base.Strings;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -272,15 +273,20 @@ public class FilerClient {
 
     public boolean createEntry(String parent, FilerProto.Entry entry) {
         try {
-            filerGrpcClient.getBlockingStub().createEntry(FilerProto.CreateEntryRequest.newBuilder()
+            FilerProto.CreateEntryResponse createEntryResponse =
+                    filerGrpcClient.getBlockingStub().createEntry(FilerProto.CreateEntryRequest.newBuilder()
                     .setDirectory(parent)
                     .setEntry(entry)
                     .build());
+            if (Strings.isNullOrEmpty(createEntryResponse.getError())) {
+                return true;
+            }
+            LOG.warn("createEntry {}/{} error: {}", parent, entry.getName(), createEntryResponse.getError());
+            return false;
         } catch (Exception e) {
             LOG.warn("createEntry {}/{}: {}", parent, entry.getName(), e);
             return false;
         }
-        return true;
     }
 
     public boolean updateEntry(String parent, FilerProto.Entry entry) {