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https://issues.apache.org/jira/browse/HDFS-9905?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15180225#comment-15180225
 ] 

Kihwal Lee commented on HDFS-9905:
----------------------------------

This is from a precommit for HDFS-9239.

{noformat}
Running org.apache.hadoop.hdfs.web.TestWebHdfsTimeouts
Tests run: 16, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 7.611 sec <<< 
FAILURE! - in org.apache.hadoop.hdfs.web.TestWebHdfsTimeouts
testAuthUrlReadTimeout[timeoutSource=ConnectionFactory](org.apache.hadoop.hdfs.web.TestWebHdfsTimeouts)
  Time elapsed: 0.083 sec  <<< FAILURE!
org.junit.ComparisonFailure: expected:<localhost:37255: [Read timed out]> but 
was:<localhost:37255: [null]>
        at org.junit.Assert.assertEquals(Assert.java:115)
        at org.junit.Assert.assertEquals(Assert.java:144)
        at 
org.apache.hadoop.hdfs.web.TestWebHdfsTimeouts.testAuthUrlReadTimeout(TestWebHdfsTimeouts.java:195)
{noformat}

We also saw this from our own build.

{noformat}
org.junit.ComparisonFailure: expected:<localhost:38830: [connect timed out]> 
but was:<localhost:38830: [null]>
        at org.junit.Assert.assertEquals(Assert.java:115)
        at org.junit.Assert.assertEquals(Assert.java:144)
        at 
org.apache.hadoop.hdfs.web.TestWebHdfsTimeouts.testTwoStepWriteConnectTimeout(TestWebHdfsTimeouts.java:206)
{noformat}

> TestWebHdfsTimeouts fails occasionally
> --------------------------------------
>
>                 Key: HDFS-9905
>                 URL: https://issues.apache.org/jira/browse/HDFS-9905
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: test
>    Affects Versions: 2.7.3
>            Reporter: Kihwal Lee
>
> When checking for a timeout, it does get {{SocketTimeoutException}}, but the 
> message sometimes does not contain "connect timed out". Since the original 
> exception is not logged, we do not know details.



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