[ 
https://issues.apache.org/jira/browse/HDFS-9691?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15146917#comment-15146917
 ] 

Hudson commented on HDFS-9691:
------------------------------

FAILURE: Integrated in Hadoop-trunk-Commit #9304 (See 
[https://builds.apache.org/job/Hadoop-trunk-Commit/9304/])
HDFS-9691. TestBlockManagerSafeMode#testCheckSafeMode fails (aajisaka: rev 
ac5da11399525dd31c49700a0bbf01cd37e347d5)
* 
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestBlockManagerSafeMode.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt


> TestBlockManagerSafeMode#testCheckSafeMode fails intermittently
> ---------------------------------------------------------------
>
>                 Key: HDFS-9691
>                 URL: https://issues.apache.org/jira/browse/HDFS-9691
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: test
>            Reporter: Mingliang Liu
>            Assignee: Mingliang Liu
>             Fix For: 2.9.0
>
>         Attachments: HDFS-9691.000.patch
>
>
> It's a flaky test method and can rarely re-produce locally. We can see this 
> happened in recent build, e.g. 
> * 
> https://builds.apache.org/job/PreCommit-HDFS-Build/14225/testReport/org.apache.hadoop.hdfs.server.blockmanagement/TestBlockManagerSafeMode/testCheckSafeMode/
> * 
> https://builds.apache.org/job/PreCommit-HDFS-Build/14139/testReport/org.apache.hadoop.hdfs.server.blockmanagement/TestBlockManagerSafeMode/testCheckSafeMode/
> {code}
> Error Message
> expected:<EXTENSION> but was:<OFF>
> Stacktrace
> java.lang.AssertionError: expected:<EXTENSION> but was:<OFF>
>       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:144)
>       at 
> org.apache.hadoop.hdfs.server.blockmanagement.TestBlockManagerSafeMode.testCheckSafeMode(TestBlockManagerSafeMode.java:165)
> {code}



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