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Posted to dev@mina.apache.org by "Emmanuel Lecharny (JIRA)" <ji...@apache.org> on 2014/11/10 06:41:33 UTC
[jira] [Comment Edited] (DIRMINA-995) Deadlock when using SSL and
proxy
[ https://issues.apache.org/jira/browse/DIRMINA-995?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14204353#comment-14204353 ]
Emmanuel Lecharny edited comment on DIRMINA-995 at 11/10/14 5:40 AM:
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The fix applied in DIRMINA-779 obviously is not good.
It seems like we are protecting the flushScheduledEvents method against concurrent access across many threads - thus the deadlock - while it was initially protecting the write queue and teh receive queue to be messed by another thread.
It has to be rethought from ground zero...
was (Author: elecharny):
The fix applied in DIRMINA-779 obviously is not good.
> Deadlock when using SSL and proxy
> ---------------------------------
>
> Key: DIRMINA-995
> URL: https://issues.apache.org/jira/browse/DIRMINA-995
> Project: MINA
> Issue Type: Bug
> Components: Filter
> Affects Versions: 2.0.7
> Environment: JRE 1.6, Linux
> Reporter: yzb81
>
> I write a SSL client to connect server through SOCKS5 proxy, then meet a deadlock.
> Maybe the reason of deadlock is I write data to a IoSession in my main thread, but now this session is reading data from socket.
> Found one Java-level deadlock:
> =============================
> "NioProcessor-7":
> waiting to lock monitor 0x0940a8a8 (object 0x98732818, a org.apache.mina.filter.ssl.SslHandler),
> which is held by "Thread-102"
> "Thread-102":
> waiting to lock monitor 0x09e8128c (object 0x9873d750, a org.apache.mina.proxy.handlers.socks.Socks5LogicHandler),
> which is held by "NioProcessor-7"
> Java stack information for the threads listed above:
> ===================================================
> "NioProcessor-7":
> at org.apache.mina.filter.ssl.SslFilter.filterWrite(SslFilter.java:576)
> - waiting to lock <0x98732818> (a org.apache.mina.filter.ssl.SslHandler)
> at org.apache.mina.core.filterchain.DefaultIoFilterChain.callPreviousFilterWrite(DefaultIoFilterChain.java:482)
> at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1400(DefaultIoFilterChain.java:47)
> at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.filterWrite(DefaultIoFilterChain.java:775)
> at org.apache.mina.core.filterchain.DefaultIoFilterChain$TailFilter.filterWrite(DefaultIoFilterChain.java:705)
> at org.apache.mina.core.filterchain.DefaultIoFilterChain.callPreviousFilterWrite(DefaultIoFilterChain.java:482)
> at org.apache.mina.core.filterchain.DefaultIoFilterChain.fireFilterWrite(DefaultIoFilterChain.java:475)
> at org.apache.mina.core.session.AbstractIoSession.write(AbstractIoSession.java:494)
> at org.apache.mina.core.session.AbstractIoSession.write(AbstractIoSession.java:439)
> at xxx.xxxProxyHandler.messageReceived(xxxProxyHandler.java:74)
> at org.apache.mina.core.filterchain.DefaultIoFilterChain$TailFilter.messageReceived(DefaultIoFilterChain.java:690)
> at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:417)
> at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:47)
> at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:765)
> at org.apache.mina.filter.ssl.SslHandler.flushScheduledEvents(SslHandler.java:322)
> at org.apache.mina.filter.ssl.SslFilter.messageReceived(SslFilter.java:497)
> at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:417)
> at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:47)
> at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:765)
> at org.apache.mina.proxy.filter.ProxyFilter.messageReceived(ProxyFilter.java:153)
> - locked <0x9873d750> (a org.apache.mina.proxy.handlers.socks.Socks5LogicHandler)
> at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:417)
> at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:47)
> at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:765)
> at org.apache.mina.core.filterchain.IoFilterAdapter.messageReceived(IoFilterAdapter.java:109)
> at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:417)
> at org.apache.mina.core.filterchain.DefaultIoFilterChain.fireMessageReceived(DefaultIoFilterChain.java:410)
> at org.apache.mina.core.polling.AbstractPollingIoProcessor.read(AbstractPollingIoProcessor.java:710)
> at org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:664)
> at org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:653)
> at org.apache.mina.core.polling.AbstractPollingIoProcessor.access$600(AbstractPollingIoProcessor.java:67)
> at org.apache.mina.core.polling.AbstractPollingIoProcessor$Processor.run(AbstractPollingIoProcessor.java:1124)
> at org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:64)
> at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
> at java.lang.Thread.run(Unknown Source)
> "Thread-102":
> at org.apache.mina.proxy.filter.ProxyFilter.writeData(ProxyFilter.java:209)
> - waiting to lock <0x9873d750> (a org.apache.mina.proxy.handlers.socks.Socks5LogicHandler)
> at org.apache.mina.proxy.filter.ProxyFilter.filterWrite(ProxyFilter.java:192)
> at org.apache.mina.core.filterchain.DefaultIoFilterChain.callPreviousFilterWrite(DefaultIoFilterChain.java:482)
> at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1400(DefaultIoFilterChain.java:47)
> at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.filterWrite(DefaultIoFilterChain.java:775)
> at org.apache.mina.filter.ssl.SslHandler.flushScheduledEvents(SslHandler.java:316)
> - locked <0x98732818> (a org.apache.mina.filter.ssl.SslHandler)
> at org.apache.mina.filter.ssl.SslFilter.filterWrite(SslFilter.java:609)
> at org.apache.mina.core.filterchain.DefaultIoFilterChain.callPreviousFilterWrite(DefaultIoFilterChain.java:482)
> at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1400(DefaultIoFilterChain.java:47)
> at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.filterWrite(DefaultIoFilterChain.java:775)
> at org.apache.mina.core.filterchain.DefaultIoFilterChain$TailFilter.filterWrite(DefaultIoFilterChain.java:705)
> at org.apache.mina.core.filterchain.DefaultIoFilterChain.callPreviousFilterWrite(DefaultIoFilterChain.java:482)
> at org.apache.mina.core.filterchain.DefaultIoFilterChain.fireFilterWrite(DefaultIoFilterChain.java:475)
> at org.apache.mina.core.session.AbstractIoSession.write(AbstractIoSession.java:494)
> at org.apache.mina.core.session.AbstractIoSession.write(AbstractIoSession.java:439)
> at xxx.run(xxx.java:219)
> at java.lang.Thread.run(Unknown Source)
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