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https://issues.apache.org/jira/browse/HADOOP-13375?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15432026#comment-15432026
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Weiwei Yang edited comment on HADOOP-13375 at 8/23/16 2:49 AM:
---------------------------------------------------------------
This issue happens to me as well when I was working on some other issues. It
fails quite often as the test case uses rarely small sleep. To get rid of this,
I had a patch that to replace those sleep-then-check logic by wait-on-value
check, it checks if the counter reaches the expected value in a given timeout,
use small interval to reduce the await time. It runs faster than before and
never fail again in my test.
I would love to upload this patch so you guys can help to review and see if it
makes sense, but the I don't know why JIRA doesn't allow me to (I fixed several
HADOOP issues before).
was (Author: cheersyang):
This issue happens to me as well when I was working on some other issues. It
fails quite often as the test case uses rarely small sleep. To get rid of this
issue, I had a patch that to remove those sleep-then-check logic by
wait-on-value check, it checks if the counter reaches the expected value in a
given timeout, use small interval to reduce the await time. It runs faster than
before and never fail again in my test.
I would love to upload this patch so you guys can help to review and see if it
makes sense, but the I don't know why JIRA doesn't allow me to (I fixed several
HADOOP issues before).
> o.a.h.security.TestGroupsCaching.testBackgroundRefreshCounters seems flaky
> --------------------------------------------------------------------------
>
> Key: HADOOP-13375
> URL: https://issues.apache.org/jira/browse/HADOOP-13375
> Project: Hadoop Common
> Issue Type: Bug
> Components: security, test
> Affects Versions: 2.8.0
> Reporter: Mingliang Liu
>
> h5. Error Message
> bq. expected:<1> but was:<0>
> h5. Stacktrace
> {quote}
> java.lang.AssertionError: expected:<1> but was:<0>
> at org.junit.Assert.fail(Assert.java:88)
> at org.junit.Assert.failNotEquals(Assert.java:743)
> at org.junit.Assert.assertEquals(Assert.java:118)
> at org.junit.Assert.assertEquals(Assert.java:555)
> at org.junit.Assert.assertEquals(Assert.java:542)
> at
> org.apache.hadoop.security.TestGroupsCaching.testBackgroundRefreshCounters(TestGroupsCaching.java:638)
> {quote}
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