Kafka
  1. Kafka
  2. KAFKA-576

SimpleConsumer throws UnsupportedOperationException: empty.head

    Details

    • Type: Bug Bug
    • Status: Closed
    • Priority: Major Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 0.8.0
    • Component/s: None
    • Labels:
      None

      Description

      • In this case, there are 15 log segment files in broker-1 data dir:

      ls -l /tmp/kafka_server_1_logs/test_1-0/
      total 240
      rw-rr- 1 jfung eng 16 Oct 16 10:41 00000000000000000000.index
      rw-rr- 1 jfung eng 10440 Oct 16 10:40 00000000000000000000.log
      rw-rr- 1 jfung eng 8 Oct 16 10:41 00000000000000000020.index
      rw-rr- 1 jfung eng 10440 Oct 16 10:40 00000000000000000020.log
      . . .
      rw-rr- 1 jfung eng 8 Oct 16 10:41 00000000000000000280.index
      rw-rr- 1 jfung eng 10440 Oct 16 10:41 00000000000000000280.log

      • The following are the dump log segment of the first log segment file

      bin/kafka-run-class.sh kafka.tools.DumpLogSegments /tmp/kafka_server_1_logs/test_1-0/00000000000000000000.log
      Dumping /tmp/kafka_server_1_logs/test_1-0/00000000000000000000.log
      Starting offset: 0
      offset: 0 isvalid: true payloadsize: 500 magic: 2 compresscodec: NoCompressionCodec crc: 1663889063
      offset: 1 isvalid: true payloadsize: 500 magic: 2 compresscodec: NoCompressionCodec crc: 2803454828
      offset: 2 isvalid: true payloadsize: 500 magic: 2 compresscodec: NoCompressionCodec crc: 683347625
      . . .
      offset: 18 isvalid: true payloadsize: 500 magic: 2 compresscodec: NoCompressionCodec crc: 1892511043
      offset: 19 isvalid: true payloadsize: 500 magic: 2 compresscodec: NoCompressionCodec crc: 601297044

      • Output of SimpleConsumerShell:
        . . .
        next offset = 16
        Topic:test_1:ThreadID:2:MessageID:0000000043:xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
        next offset = 17
        Topic:test_1:ThreadID:3:MessageID:0000000063:xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
        next offset = 18
        Topic:test_1:ThreadID:4:MessageID:0000000083:xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
        next offset = 19
        Topic:test_1:ThreadID:0:MessageID:0000000003:xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
        next offset = 19
        Topic:test_1:ThreadID:0:MessageID:0000000003:xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
        next offset = 19
        Topic:test_1:ThreadID:0:MessageID:0000000003:xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
        next offset = 19
        Topic:test_1:ThreadID:0:MessageID:0000000003:xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
        . . .
      • It appears that SimpleConsumerShell doesn't advance to the next log segment file
      • It should probably block inside the while loop to prevent infinite looping
      1. kafka_server_9093.log.gz
        3 kB
        John Fung
      2. kafka_576_v1.diff
        3 kB
        Yang Ye

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            • Assignee:
              Yang Ye
              Reporter:
              John Fung
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              • Created:
                Updated:
                Resolved:

                Development