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https://issues.apache.org/jira/browse/KAFKA-3453?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15209404#comment-15209404
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Ismael Juma commented on KAFKA-3453:
------------------------------------
MiniKDC has recently received a fix for something similar to what is described
here:
https://github.com/apache/hadoop/commit/8fb70a031b323634ddc51ff6aff4f376baef68c8
> Transient test failures due to MiniKDC port allocation strategy
> ---------------------------------------------------------------
>
> Key: KAFKA-3453
> URL: https://issues.apache.org/jira/browse/KAFKA-3453
> Project: Kafka
> Issue Type: Bug
> Affects Versions: 0.9.0.1
> Reporter: Ewen Cheslack-Postava
>
> A number of tests, especially our consumer tests, fail transiently because
> MiniKDC allocates ports by creating a socket, getting its port, then closing
> it. As previously addressed in our own code, this causes problems because
> that port can be reallocated before the process has a chance to bind a new
> socket -- whether due to another test running in parallel or another process
> simply binding the port first. This results in errors like this in the tests:
> {quote}
> java.net.BindException: Address already in use
> at sun.nio.ch.Net.bind0(Native Method)
> at sun.nio.ch.Net.bind(Net.java:444)
> at sun.nio.ch.Net.bind(Net.java:436)
> at
> sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:214)
> at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)
> at
> org.apache.mina.transport.socket.nio.NioSocketAcceptor.open(NioSocketAcceptor.java:198)
> at
> org.apache.mina.transport.socket.nio.NioSocketAcceptor.open(NioSocketAcceptor.java:51)
> at
> org.apache.mina.core.polling.AbstractPollingIoAcceptor.registerHandles(AbstractPollingIoAcceptor.java:547)
> at
> org.apache.mina.core.polling.AbstractPollingIoAcceptor.access$400(AbstractPollingIoAcceptor.java:68)
> at
> org.apache.mina.core.polling.AbstractPollingIoAcceptor$Acceptor.run(AbstractPollingIoAcceptor.java:422)
> at
> org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:64)
> 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)
> {quote}
> This is an ongoing issue that Confluent sees in its Jenkins builds, which is
> the reason for this ticket. The real issue is actually in MiniKDC (we pass in
> "0" for the port, but then it uses this other port allocation strategy), but
> we either need to a) figure out a workaround or b) get a fix in upstream and
> then update to a newer MiniKDC version.
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