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https://issues.apache.org/jira/browse/HADOOP-12090?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15553524#comment-15553524
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Sangjin Lee commented on HADOOP-12090:
--------------------------------------
bq. Sangjin Lee On which platforms do you see this problem? We are seeing the
issue 10% of the time with a source tree based on 2.6.
I think I saw this on Centos 6.
bq. Since the patch 002 increased the socket buffer size for minikdc, does it
mean a certain socker buffer size can reliably reproduce the problem on some
platforms? What is that size? 1140 bytes?
The default would reproduce this (at least in my problem environment). The
default is 1 KB if I'm not mistaken. To some extent, this is OS sensitive
because it has something to do with the TCP window management. For example, I
was not able to reproduce this on mac.
> minikdc-related unit tests fail consistently on some platforms
> --------------------------------------------------------------
>
> Key: HADOOP-12090
> URL: https://issues.apache.org/jira/browse/HADOOP-12090
> Project: Hadoop Common
> Issue Type: Bug
> Components: kms, test
> Affects Versions: 2.7.0
> Reporter: Sangjin Lee
> Assignee: Sangjin Lee
> Attachments: HADOOP-12090.001.patch, HADOOP-12090.002.patch
>
>
> On some platforms all unit tests that use minikdc fail consistently. Those
> tests include TestKMS, TestSaslDataTransfer,
> TestTimelineAuthenticationFilter, etc.
> Typical failures on the unit tests:
> {noformat}
> java.lang.AssertionError:
> org.apache.hadoop.security.authentication.client.AuthenticationException:
> GSSException: No valid credentials provided (Mechanism level: Cannot get a
> KDC reply)
> at org.junit.Assert.fail(Assert.java:88)
> at
> org.apache.hadoop.crypto.key.kms.server.TestKMS$8$4.run(TestKMS.java:1154)
> at
> org.apache.hadoop.crypto.key.kms.server.TestKMS$8$4.run(TestKMS.java:1145)
> 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:1645)
> at
> org.apache.hadoop.crypto.key.kms.server.TestKMS.doAs(TestKMS.java:261)
> at
> org.apache.hadoop.crypto.key.kms.server.TestKMS.access$100(TestKMS.java:76)
> {noformat}
> The errors that cause this failure on the KDC server on the minikdc are a
> NullPointerException:
> {noformat}
> org.apache.mina.filter.codec.ProtocolDecoderException:
> java.lang.NullPointerException: message (Hexdump: ...)
> at
> org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(ProtocolCodecFilter.java:234)
> at
> org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:434)
> at
> org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:48)
> at
> org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:802)
> at
> org.apache.mina.core.filterchain.IoFilterAdapter.messageReceived(IoFilterAdapter.java:120)
> at
> org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:434)
> at
> org.apache.mina.core.filterchain.DefaultIoFilterChain.fireMessageReceived(DefaultIoFilterChain.java:426)
> at
> org.apache.mina.core.polling.AbstractPollingIoProcessor.read(AbstractPollingIoProcessor.java:604)
> at
> org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:564)
> at
> org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:553)
> at
> org.apache.mina.core.polling.AbstractPollingIoProcessor.access$400(AbstractPollingIoProcessor.java:57)
> at
> org.apache.mina.core.polling.AbstractPollingIoProcessor$Processor.run(AbstractPollingIoProcessor.java:892)
> at
> org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:65)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:745)
> Caused by: java.lang.NullPointerException: message
> at
> org.apache.mina.filter.codec.AbstractProtocolDecoderOutput.write(AbstractProtocolDecoderOutput.java:44)
> at
> org.apache.directory.server.kerberos.protocol.codec.MinaKerberosDecoder.decode(MinaKerberosDecoder.java:65)
> at
> org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(ProtocolCodecFilter.java:224)
> ... 15 more
> {noformat}
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