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https://issues.apache.org/jira/browse/HADOOP-8192?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13238473#comment-13238473
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Kumar Ravi commented on HADOOP-8192:
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I think it would be extremely useful to understand if CombineFileInputFormat's
getSplits() is working as designed -- Should the method exit out of the loop
as soon as all blocks are accounted for. If so, the next question is - Is this
is a testcase scenario issue? -- In a production environment are there
scenarios where a Datanode will contain all the blocks in a cluster?
We would like to make sure that we are not fixing a non-existent problem to
pass a test case, and inadvertently break the split functionality when it is
working without issues. If this just happens to be a behavior issue between two
JVMs for a given scenario then it might be more prudent to create separate test
paths for each JVM.
> Fix unit test failures with IBM's JDK
> -------------------------------------
>
> Key: HADOOP-8192
> URL: https://issues.apache.org/jira/browse/HADOOP-8192
> Project: Hadoop Common
> Issue Type: Bug
> Environment: java version "1.6.0"
> Java(TM) SE Runtime Environment (build pxi3260sr10-20111208_01(SR10))
> IBM J9 VM (build 2.4, JRE 1.6.0 IBM J9 2.4 Linux x86-32
> jvmxi3260sr10-20111207_96808 (JIT enabled, AOT enabled)
> J9VM - 20111207_096808
> JIT - r9_20111107_21307ifx1
> GC - 20110519_AA)
> JCL - 20111104_02
> Reporter: Devaraj Das
>
> Some tests fail with IBM's JDK. They are
> org.apache.hadoop.mapred.lib.TestCombineFileInputFormat,
> org.apache.hadoop.mapreduce.lib.input.TestCombineFileInputFormat,
> org.apache.hadoop.streaming.TestStreamingBadRecords,
> org.apache.hadoop.mapred.TestCapacityScheduler. This jira is to track fixing
> these.
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