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Posted to dev@hc.apache.org by "Oleg Kalnichevski (JIRA)" <ji...@apache.org> on 2019/05/27 16:29:00 UTC
[jira] [Resolved] (HTTPCORE-580) Java-level deadlock
[ https://issues.apache.org/jira/browse/HTTPCORE-580?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Oleg Kalnichevski resolved HTTPCORE-580.
----------------------------------------
Resolution: Duplicate
> Java-level deadlock
> -------------------
>
> Key: HTTPCORE-580
> URL: https://issues.apache.org/jira/browse/HTTPCORE-580
> Project: HttpComponents HttpCore
> Issue Type: Bug
> Components: HttpCore NIO
> Affects Versions: 4.4.7
> Environment: Wildfly 12 + jdk 1.8.144
> Reporter: Andrea Grassi
> Priority: Major
> Labels: Deadlock, java
>
> Hi,
> we found the following deadlock :
> Found one Java-level deadlock:
> =============================
> "I/O dispatcher 7627":
> waiting to lock monitor 0x000000000bbb7428 (object 0x00000000bdf9d240, a java.lang.Object),
> which is held by "default task-897"
> "default task-897":
> waiting to lock monitor 0x0000000004b38638 (object 0x00000000bdf9d158, a sun.nio.ch.SelectionKeyImpl),
> which is held by "I/O dispatcher 7627"
> Java stack information for the threads listed above:
> ===================================================
> "I/O dispatcher 7627":
> at java.nio.channels.spi.AbstractInterruptibleChannel.close(AbstractInterruptibleChannel.java:111)
> - waiting to lock <0x00000000bdf9d240> (a java.lang.Object)
> at org.apache.http.impl.nio.reactor.IOSessionImpl.close(IOSessionImpl.java:226)
> - locked <0x00000000bdf9d158> (a sun.nio.ch.SelectionKeyImpl)
> at org.apache.http.impl.nio.reactor.IOSessionImpl.shutdown(IOSessionImpl.java:254)
> at org.apache.http.impl.nio.reactor.AbstractIODispatch.connected(AbstractIODispatch.java:91)
> at org.apache.http.impl.nio.reactor.BaseIOReactor.sessionCreated(BaseIOReactor.java:250)
> at org.apache.http.impl.nio.reactor.AbstractIOReactor.processNewChannels(AbstractIOReactor.java:429)
> at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:289)
> at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:106)
> at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:590)
> at java.lang.Thread.run(Thread.java:748)
> "default task-897":
> at java.nio.channels.spi.AbstractSelectionKey.cancel(AbstractSelectionKey.java:70)
> - waiting to lock <0x00000000bdf9d158> (a sun.nio.ch.SelectionKeyImpl)
> at java.nio.channels.spi.AbstractSelectableChannel.implCloseChannel(AbstractSelectableChannel.java:240)
> - locked <0x00000000bdf9d280> (a java.lang.Object)
> at java.nio.channels.spi.AbstractInterruptibleChannel.close(AbstractInterruptibleChannel.java:115)
> - locked <0x00000000bdf9d240> (a java.lang.Object)
> at org.apache.http.impl.nio.reactor.SessionRequestImpl.cancel(SessionRequestImpl.java:215)
> at org.apache.http.nio.pool.AbstractNIOConnPool.shutdown(AbstractNIOConnPool.java:214)
> at org.apache.http.impl.nio.conn.PoolingNHttpClientConnectionManager.shutdown(PoolingNHttpClientConnectionManager.java:206)
> at org.apache.http.impl.nio.client.CloseableHttpAsyncClientBase.close(CloseableHttpAsyncClientBase.java:99)
> _______________
> we think the issue is due to SessionRequestImpl.java at 215 calling a channel.close() not synchronized while AbstractInterruptibleChannel.java:111 is synchronized
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