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https://issues.apache.org/jira/browse/HTTPCORE-564?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16712572#comment-16712572
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Max Rozhkov commented on HTTPCORE-564:
--------------------------------------
[~olegk] I've tried Java 8 and 10 with and without tests (see the error
messages above).
The build fails at the stage of JavaDoc generation.
Besides that there are broken tests for Java 8.
It seems the branch 4.4.x is not quite stable. I'm going to test 4.4.10 + the
patch you've provided. Will the test be good enough for you?
> Eliminate a deadlock in IOReactor
> ---------------------------------
>
> Key: HTTPCORE-564
> URL: https://issues.apache.org/jira/browse/HTTPCORE-564
> Project: HttpComponents HttpCore
> Issue Type: Bug
> Affects Versions: 4.4.10
> Reporter: Max Rozhkov
> Assignee: Oleg Kalnichevski
> Priority: Major
>
> *User Story*
> We use async http client in very high load environment where several
> thousands of http requests are sent per second. It is an SSP service where
> timeout has to be measured and a request to be voided after timeout.
> We set up usual timeouts configured in IO Reactor and control timeouts
> externally as well. When time is out the request will be cancelled explicitly
> with _AbstractExecutionAwareRequest.abort()_.
> *Problem description*
> Deadlock could happen in very highload environment. See stack information
> below.
> *Stack trace*
> {{"timeout-controller-0-00":}}
> {{ at
> java.nio.channels.spi.AbstractInterruptibleChannel.close([email protected]/AbstractInterruptibleChannel.java:108)}}
> {{ - waiting to lock <0x000000112c420bd0> (a java.lang.Object)}}
> {{ at
> org.apache.http.impl.nio.reactor.IOSessionImpl.close(IOSessionImpl.java:227)}}
> {{ - locked <0x000000112c420be0> (a sun.nio.ch.SelectionKeyImpl)}}
> {{ at
> org.apache.http.impl.nio.reactor.IOSessionImpl.shutdown(IOSessionImpl.java:255)}}
> {{ at
> org.apache.http.impl.nio.NHttpConnectionBase.shutdown(NHttpConnectionBase.java:579)}}
> {{ at
> org.apache.http.impl.nio.conn.CPoolEntry.shutdownConnection(CPoolEntry.java:80)}}
> {{ at org.apache.http.impl.nio.conn.CPoolProxy.shutdown(CPoolProxy.java:91)}}
> {{ at
> org.apache.http.impl.nio.client.AbstractClientExchangeHandler.discardConnection(AbstractClientExchangeHandler.java:267)}}
> {{ at
> org.apache.http.impl.nio.client.AbstractClientExchangeHandler.cancel(AbstractClientExchangeHandler.java:447)}}
> {{ at
> org.apache.http.client.methods.AbstractExecutionAwareRequest.abort(AbstractExecutionAwareRequest.java:90)}}
> {{ at
> net.thumbtack.ssp.requester.AsyncHttpClient.lambda$execute$1(AsyncHttpClient.java:83)}}
> {{ at
> net.thumbtack.ssp.requester.AsyncHttpClient$$Lambda$1768/0x00000017c29f6440.run(Unknown
> Source)}}
> {{ at
> net.thumbtack.adtech.concurrent.TimeLimitedExecution.lambda$future$1(TimeLimitedExecution.java:70)}}
> {{ at
> net.thumbtack.adtech.concurrent.TimeLimitedExecution$$Lambda$1770/0x00000017c29f6c40.run(Unknown
> Source)}}
> {{ at
> net.thumbtack.adtech.concurrent.TimeoutController.check(TimeoutController.java:47)}}
> {{ at
> net.thumbtack.adtech.concurrent.TimeoutController$$Lambda$1022/0x00000017c28acc40.run(Unknown
> Source)}}
> {{ at
> java.util.concurrent.Executors$RunnableAdapter.call([email protected]/Executors.java:515)}}
> {{ at
> java.util.concurrent.FutureTask.runAndReset([email protected]/FutureTask.java:305)}}
> {{ at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run([email protected]/ScheduledThreadPoolExecutor.java:305)}}
> {{ at
> java.util.concurrent.ThreadPoolExecutor.runWorker([email protected]/ThreadPoolExecutor.java:1128)}}
> {{ at
> java.util.concurrent.ThreadPoolExecutor$Worker.run([email protected]/ThreadPoolExecutor.java:628)}}
> {{ at java.lang.Thread.run([email protected]/Thread.java:834)}}
> {{"pool-21-thread-1":}}
> {{ at
> java.nio.channels.spi.AbstractSelectionKey.cancel([email protected]/AbstractSelectionKey.java:70)}}
> {{ - waiting to lock <0x000000112c420be0> (a sun.nio.ch.SelectionKeyImpl)}}
> {{ at
> java.nio.channels.spi.AbstractSelectableChannel.implCloseChannel([email protected]/AbstractSelectableChannel.java:255)}}
> {{ at
> java.nio.channels.spi.AbstractInterruptibleChannel.close([email protected]/AbstractInterruptibleChannel.java:112)}}
> {{ - locked <0x000000112c420bd0> (a java.lang.Object)}}
> {{ at
> org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor.doShutdown(AbstractMultiworkerIOReactor.java:414)}}
> {{ at
> org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor.execute(AbstractMultiworkerIOReactor.java:374)}}
> {{ at
> org.apache.http.impl.nio.conn.PoolingNHttpClientConnectionManager.execute(PoolingNHttpClientConnectionManager.java:221)}}
> {{ at
> org.apache.http.impl.nio.client.CloseableHttpAsyncClientBase$1.run(CloseableHttpAsyncClientBase.java:64)}}
> {{ at java.lang.Thread.run([email protected]/Thread.java:834) }}
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