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https://issues.apache.org/jira/browse/DIRMINA-1118?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16905135#comment-16905135
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Christoph John commented on DIRMINA-1118:
-----------------------------------------
No, sorry. I was just saying that tests are failing due to removal of anon
cipher suites. I don't know whether the NPE has something to do with it.
But I think the NPE should at least be prevented since it spams the logs. Funny
though that the writeRequestQueue seems to be not empty but when polling it,
NULL is returned. But I am not very familiar with the internals of MINA, so
maybe some other thread is also polling/flushing the request queue.
> NPE in SslHandler.checkStatus
> -----------------------------
>
> Key: DIRMINA-1118
> URL: https://issues.apache.org/jira/browse/DIRMINA-1118
> Project: MINA
> Issue Type: Bug
> Affects Versions: 2.1.3
> Reporter: Christoph John
> Priority: Major
>
> Since some days we receive this NPE on our build server when running tests.
> Interestingly this occurs since OpenJDK has been switched from 8.192 to
> 8.222. However, it is probably just coincidence.
> {code}
> <20190810-14:45:11, FIX.4.4:ALFA0->ZULU0, error>
> (java.lang.NullPointerException
> java.lang.NullPointerException
> at
> org.apache.mina.filter.ssl.SslHandler.checkStatus(SslHandler.java:539)
> at
> org.apache.mina.filter.ssl.SslHandler.messageReceived(SslHandler.java:374)
> at
> org.apache.mina.filter.ssl.SslFilter.messageReceived(SslFilter.java:517)
> at
> org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:650)
> at
> org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1300(DefaultIoFilterChain.java:49)
> at
> org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:1128)
> at
> org.apache.mina.core.filterchain.IoFilterAdapter.messageReceived(IoFilterAdapter.java:122)
> at
> org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:650)
> at
> org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1300(DefaultIoFilterChain.java:49)
> at
> org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:1128)
> at
> org.apache.mina.core.filterchain.IoFilterAdapter.messageReceived(IoFilterAdapter.java:122)
> at
> org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:650)
> at
> org.apache.mina.core.filterchain.DefaultIoFilterChain.fireMessageReceived(DefaultIoFilterChain.java:643)
> at
> org.apache.mina.core.polling.AbstractPollingIoProcessor.read(AbstractPollingIoProcessor.java:539)
> at
> org.apache.mina.core.polling.AbstractPollingIoProcessor.access$1200(AbstractPollingIoProcessor.java:68)
> at
> org.apache.mina.core.polling.AbstractPollingIoProcessor$Processor.process(AbstractPollingIoProcessor.java:1222)
> at
> org.apache.mina.core.polling.AbstractPollingIoProcessor$Processor.process(AbstractPollingIoProcessor.java:1211)
> at
> org.apache.mina.core.polling.AbstractPollingIoProcessor$Processor.run(AbstractPollingIoProcessor.java:683)
> at
> org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:64)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> at java.lang.Thread.run(Thread.java:748)
> {code}
> https://github.com/apache/mina/blame/2.1.X/mina-core/src/main/java/org/apache/mina/filter/ssl/SslHandler.java#L539
> IMHO when polling a queue then NULL can also be returned.
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