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https://issues.apache.org/jira/browse/MAPREDUCE-5005?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13578812#comment-13578812
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Sandy Ryza commented on MAPREDUCE-5005:
---------------------------------------
A short sleep could be put in a loop, so that the test can finish quickly but
take as long as it needs
{code}
for (max tries) {
sleep(100 ms)
if (process dead) break
}
{code}
> TestProcfsProcessTree#testProcessTree() doesn't wait long enough for the
> process to die
> ---------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-5005
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-5005
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Affects Versions: 2.0.2-alpha
> Reporter: Karthik Kambatla
>
> TestProcfsProcessTree#testProcessTree fails occasionally with the following
> stack trace
> {noformat}
> Stack Trace:
> junit.framework.AssertionFailedError: expected:<false> but was:<true>
> at
> org.apache.hadoop.util.TestProcfsBasedProcessTree.testProcessTree(TestProcfsBasedProcessTree.java)
> {noformat}
> kill -9 is executed asynchronously, the signal is delivered when the process
> comes out of the kernel (sys call). Checking if the process died immediately
> after can fail at times.
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