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  1. Hadoop HDFS
  2. HDFS-2433

TestFileAppend4 fails intermittently


    • Type: Bug
    • Status: Resolved
    • Priority: Critical
    • Resolution: Cannot Reproduce
    • Affects Version/s:, 1.0.0
    • Fix Version/s: None
    • Component/s: datanode, namenode, test
    • Labels:
    • Target Version/s:


      A Jenkins build we have running failed twice in a row with issues form TestFileAppend4.testAppendSyncReplication1 in an attempt to reproduce the error I ran TestFileAppend4 in a loop over night saving the results away. (No clean was done in between test runs)

      When TestFileAppend4 is run in a loop the testAppendSyncReplication[012] tests fail about 10% of the time (14 times out of 130 tries) They all fail with something like the following. Often it is only one of the tests that fail, but I have seen as many as two fail in one run.

      Testcase: testAppendSyncReplication2 took 32.198 sec
      Should have 2 replicas for that block, not 1
      junit.framework.AssertionFailedError: Should have 2 replicas for that block, not 1
              at org.apache.hadoop.hdfs.TestFileAppend4.replicationTest(TestFileAppend4.java:477)
              at org.apache.hadoop.hdfs.TestFileAppend4.testAppendSyncReplication2(TestFileAppend4.java:425)

      I also saw several other tests that are a part of TestFileApped4 fail during this experiment. They may all be related to one another so I am filing them in the same JIRA. If it turns out that they are not related then they can be split up later.

      testAppendSyncBlockPlusBbw failed 6 out of the 130 times or about 5% of the time

      Testcase: testAppendSyncBlockPlusBbw took 1.633 sec
      unexpected file size! received=0 , expected=1024
      junit.framework.AssertionFailedError: unexpected file size! received=0 , expected=1024
              at org.apache.hadoop.hdfs.TestFileAppend4.assertFileSize(TestFileAppend4.java:136)
              at org.apache.hadoop.hdfs.TestFileAppend4.testAppendSyncBlockPlusBbw(TestFileAppend4.java:401)

      testAppendSyncChecksum[012] failed 2 out of the 130 times or about 1.5% of the time

      Testcase: testAppendSyncChecksum1 took 32.385 sec
      Should have 1 replica for that block, not 2
      junit.framework.AssertionFailedError: Should have 1 replica for that block, not 2
              at org.apache.hadoop.hdfs.TestFileAppend4.checksumTest(TestFileAppend4.java:556)
              at org.apache.hadoop.hdfs.TestFileAppend4.testAppendSyncChecksum1(TestFileAppend4.java:500)

      I will attach logs for all of the failures. Be aware that I did change some of the logging messages in this test so I could better see when testAppendSyncReplication started and ended. Other then that the code is stock 0.20.205 RC2


        1. failed.tar.bz2
          3.03 MB
          Robert Joseph Evans



            • Assignee:
              revans2 Robert Joseph Evans
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