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https://issues.apache.org/jira/browse/HDFS-9905?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15183212#comment-15183212
 ] 

Wei-Chiu Chuang commented on HDFS-9905:
---------------------------------------

This is the full stacktrace: unfortunately, the exception object was 
reinterpreted in the exception handling, so the original stack trace was lost.
We might also want to retain the original full stack trace.

{noformat}
Tests run: 16, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 3.555 sec <<< 
FAILURE! - in org.apache.hadoop.hdfs.web.TestWebHdfsTimeouts
testAuthUrlReadTimeout[timeoutSource=Configuration](org.apache.hadoop.hdfs.web.TestWebHdfsTimeouts)
  Time elapsed: 0.036 sec  <<< FAILURE!
java.lang.AssertionError: Expected to find 'localhost:38159: Read timed out' 
but got unexpected exception:java.net.SocketTimeoutException: localhost:38159: 
null
        at sun.reflect.GeneratedConstructorAccessor15.newInstance(Unknown 
Source)
        at 
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
        at 
org.apache.hadoop.hdfs.web.WebHdfsFileSystem$AbstractRunner.runWithRetry(WebHdfsFileSystem.java:733)
        at 
org.apache.hadoop.hdfs.web.WebHdfsFileSystem$AbstractRunner.access$100(WebHdfsFileSystem.java:555)
        at 
org.apache.hadoop.hdfs.web.WebHdfsFileSystem$AbstractRunner$1.run(WebHdfsFileSystem.java:586)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:415)
        at 
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1742)
        at 
org.apache.hadoop.hdfs.web.WebHdfsFileSystem$AbstractRunner.run(WebHdfsFileSystem.java:582)
        at 
org.apache.hadoop.hdfs.web.WebHdfsFileSystem.getDelegationToken(WebHdfsFileSystem.java:1456)
        at 
org.apache.hadoop.hdfs.web.TestWebHdfsTimeouts.testAuthUrlReadTimeout(TestWebHdfsTimeouts.java:195)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at 
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
        at 
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
        at 
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
        at 
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
        at 
org.junit.internal.runners.statements.FailOnTimeout$StatementThread.run(FailOnTimeout.java:74)

        at sun.reflect.GeneratedConstructorAccessor15.newInstance(Unknown 
Source)
        at 
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
        at 
org.apache.hadoop.hdfs.web.WebHdfsFileSystem$AbstractRunner.runWithRetry(WebHdfsFileSystem.java:733)
        at 
org.apache.hadoop.hdfs.web.WebHdfsFileSystem$AbstractRunner.access$100(WebHdfsFileSystem.java:555)
        at 
org.apache.hadoop.hdfs.web.WebHdfsFileSystem$AbstractRunner$1.run(WebHdfsFileSystem.java:586)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:415)
        at 
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1742)
        at 
org.apache.hadoop.hdfs.web.WebHdfsFileSystem$AbstractRunner.run(WebHdfsFileSystem.java:582)
        at 
org.apache.hadoop.hdfs.web.WebHdfsFileSystem.getDelegationToken(WebHdfsFileSystem.java:1456)
        at 
org.apache.hadoop.hdfs.web.TestWebHdfsTimeouts.testAuthUrlReadTimeout(TestWebHdfsTimeouts.java:195)
{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
>            Assignee: Wei-Chiu Chuang
>
> 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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