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https://issues.apache.org/jira/browse/HBASE-28274?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17799989#comment-17799989
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Hudson commented on HBASE-28274:
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Results for branch branch-2.6
[build #18 on
builds.a.o|https://ci-hbase.apache.org/job/HBase%20Nightly/job/branch-2.6/18/]:
(x) *{color:red}-1 overall{color}*
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details (if available):
(/) {color:green}+1 general checks{color}
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report|https://ci-hbase.apache.org/job/HBase%20Nightly/job/branch-2.6/18/General_20Nightly_20Build_20Report/]
(/) {color:green}+1 jdk8 hadoop2 checks{color}
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report|https://ci-hbase.apache.org/job/HBase%20Nightly/job/branch-2.6/18/JDK8_20Nightly_20Build_20Report_20_28Hadoop2_29/]
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(x) {color:red}-1 jdk11 hadoop3 checks{color}
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(/) {color:green}+1 source release artifact{color}
-- See build output for details.
(/) {color:green}+1 client integration test{color}
> Flaky test: TestFanOutOneBlockAsyncDFSOutput (Part 2)
> -----------------------------------------------------
>
> Key: HBASE-28274
> URL: https://issues.apache.org/jira/browse/HBASE-28274
> Project: HBase
> Issue Type: Test
> Components: flakies, integration tests, test
> Reporter: Andor Molnar
> Assignee: Andor Molnar
> Priority: Major
> Fix For: 2.6.0, 2.4.18, 3.0.0-beta-1, 2.5.8
>
>
> The following test sometimes fails for me when running locally with Maven:
> TestFanOutOneBlockAsyncDFSOutput.testRecover()
> I can't really figure out the reason, but it's probably a side effect of the
> preceding test: testConnectToDatanodeFailed(). This test also restarts one of
> the datanodes in the MiniDFS cluster just like testRecover() and it somehow
> causes the failure.
> {noformat}
> java.lang.AssertionError: flush should fail
> at org.junit.Assert.fail(Assert.java:89)
> at
> org.apache.hadoop.hbase.io.asyncfs.TestFanOutOneBlockAsyncDFSOutput.testRecover(TestFanOutOneBlockAsyncDFSOutput.java:154)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method){noformat}
> The flush() call is testRecover() should fail, because we restart one of the
> DN in the DFS cluster which is expected to brake connection. It succeeds
> though if the preceding test already restarted a DN. No matter which DN we
> restart, even if they're different, the error occurs.
> I also tried to add CLUSTER.waitDatanodeFullyStarted() at the end of
> testConnectToDatanodeFailed(), looks like it made the tests slightly more
> stable, but didn't help fully.
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