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Posted to dev@mina.apache.org by "Eugene Petrenko (JIRA)" <ji...@apache.org> on 2016/01/26 21:38:40 UTC
[jira] [Updated] (SSHD-631) Deadlock on stream flush in command
from callback tread
[ https://issues.apache.org/jira/browse/SSHD-631?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Eugene Petrenko updated SSHD-631:
---------------------------------
Description:
Command is running in the pooled thread and calls flush. Meanwhile, command staring code also calls flush (because of a bug from my side) to the same stream. Finally we have a deadlock if exception is thrown from channel
{code}
"sshd-nio2-14" Id=119 BLOCKED on org.apache.sshd.common.channel.ChannelOutputStream@26f0deaf owned by "ssh-commands-8" Id=175
at org.apache.sshd.common.channel.ChannelOutputStream.flush(ChannelOutputStream.java:118)
- blocked on org.apache.sshd.common.channel.ChannelOutputStream@26f0deaf
at jetbrains.vcs.server.settings.util.FileUtil.flushAndCatch(FileUtil.java:205)
at jetbrains.ssh.server.command.BaseCommand.start(BaseCommand.java:51)
at org.apache.sshd.server.channel.ChannelSession.handleExec(ChannelSession.java:495)
at org.apache.sshd.server.channel.ChannelSession.handleRequest(ChannelSession.java:330)
at org.apache.sshd.server.channel.ChannelSession$ChannelSessionRequestHandler.process(ChannelSession.java:680)
at org.apache.sshd.server.channel.ChannelSession$ChannelSessionRequestHandler.process(ChannelSession.java:673)
at org.apache.sshd.common.channel.AbstractChannel.handleRequest(AbstractChannel.java:153)
at org.apache.sshd.common.session.AbstractConnectionService.channelRequest(AbstractConnectionService.java:321)
at org.apache.sshd.common.session.AbstractConnectionService.process(AbstractConnectionService.java:194)
at org.apache.sshd.common.session.AbstractSession.doHandleMessage(AbstractSession.java:401)
at org.apache.sshd.common.session.AbstractSession.handleMessage(AbstractSession.java:349)
- locked java.lang.Object@521226a1
at org.apache.sshd.common.session.AbstractSession.decode(AbstractSession.java:848)
at org.apache.sshd.common.session.AbstractSession.messageReceived(AbstractSession.java:331)
- locked java.lang.Object@5df68b49
at jetbrains.ssh.server.SSHServerSessionEx.super_messageReceived(SSHServerSessionEx.java:49)
at jetbrains.ssh.server.SSHServerSessionEx.access$000(SSHServerSessionEx.java:12)
at jetbrains.ssh.server.SSHServerSessionEx$1.call(SSHServerSessionEx.java:28)
at jetbrains.ssh.server.SSHServerSessionEx$1.call(SSHServerSessionEx.java:25)
at jetbrains.ssh.server.SSHLogger.ioMDC(SSHLogger.java:128)
at jetbrains.ssh.server.SSHLogger.MDC(SSHLogger.java:136)
at jetbrains.ssh.server.SSHServerSessionEx.messageReceived(SSHServerSessionEx.java:25)
at org.apache.sshd.common.session.AbstractSessionIoHandler.messageReceived(AbstractSessionIoHandler.java:57)
at org.apache.sshd.common.io.nio2.Nio2Session$2.onCompleted(Nio2Session.java:220)
at org.apache.sshd.common.io.nio2.Nio2Session$2.onCompleted(Nio2Session.java:212)
at org.apache.sshd.common.io.nio2.Nio2CompletionHandler$1.run(Nio2CompletionHandler.java:34)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.completed(Nio2CompletionHandler.java:31)
at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126)
at sun.nio.ch.Invoker$2.run(Invoker.java:218)
at sun.nio.ch.AsynchronousChannelGroupImpl$1.run(AsynchronousChannelGroupImpl.java:112)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at jetbrains.vcs.server.settings.util.DaemonThreadFactory$1.run(DaemonThreadFactory.java:32)
at java.lang.Thread.run(Thread.java:745)
"sshd-nio2-38" Id=144 BLOCKED on java.lang.Object@521226a1 owned by "sshd-nio2-14" Id=119
at org.apache.sshd.common.session.AbstractSession.exceptionCaught(AbstractSession.java:505)
- blocked on java.lang.Object@521226a1
at jetbrains.ssh.server.SSHServerSessionEx.super_exceptionCaught(SSHServerSessionEx.java:53)
at jetbrains.ssh.server.SSHServerSessionEx.access$200(SSHServerSessionEx.java:12)
at jetbrains.ssh.server.SSHServerSessionEx$2.call(SSHServerSessionEx.java:42)
at jetbrains.ssh.server.SSHServerSessionEx$2.call(SSHServerSessionEx.java:36)
at jetbrains.ssh.server.SSHLogger.ioMDC(SSHLogger.java:128)
at jetbrains.ssh.server.SSHLogger.MDC(SSHLogger.java:136)
at jetbrains.ssh.server.SSHServerSessionEx.exceptionCaught(SSHServerSessionEx.java:36)
at org.apache.sshd.common.session.AbstractSessionIoHandler.exceptionCaught(AbstractSessionIoHandler.java:49)
at org.apache.sshd.common.io.nio2.Nio2Session.exceptionCaught(Nio2Session.java:137)
at org.apache.sshd.common.io.nio2.Nio2Session.access$500(Nio2Session.java:46)
at org.apache.sshd.common.io.nio2.Nio2Session$3.onFailed(Nio2Session.java:278)
at org.apache.sshd.common.io.nio2.Nio2CompletionHandler$2.run(Nio2CompletionHandler.java:45)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.failed(Nio2CompletionHandler.java:42)
at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:128)
at sun.nio.ch.Invoker$2.run(Invoker.java:218)
at sun.nio.ch.AsynchronousChannelGroupImpl$1.run(AsynchronousChannelGroupImpl.java:112)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at jetbrains.vcs.server.settings.util.DaemonThreadFactory$1.run(DaemonThreadFactory.java:32)
at java.lang.Thread.run(Thread.java:745)
"ssh-commands-8" Id=175 WAITING on org.apache.sshd.common.channel.Window@32ef1edd
at java.lang.Object.$$YJP$$wait(Native Method)
- waiting on org.apache.sshd.common.channel.Window@32ef1edd
at java.lang.Object.wait(Object.java)
at java.lang.Object.wait(Object.java:502)
at org.apache.sshd.common.channel.Window.waitForSpace(Window.java:175)
at org.apache.sshd.common.channel.ChannelOutputStream.flush(ChannelOutputStream.java:126)
- locked org.apache.sshd.common.channel.ChannelOutputStream@26f0deaf
at org.apache.sshd.common.channel.ChannelOutputStream.write(ChannelOutputStream.java:93)
- locked org.apache.sshd.common.channel.ChannelOutputStream@26f0deaf
at java.io.OutputStream.write(OutputStream.java:75)
at jetbrains.vcs.server.hosting.git.ssh.GitUploadPackCommand.executeImpl(GitUploadPackCommand.java:32)
at jetbrains.vcs.server.hosting.git.ssh.GitCommandBase.lambda$execute$7(GitCommandBase.java:54)
at jetbrains.vcs.server.hosting.git.ssh.GitCommandBase$$Lambda$83/2046592573.execute(Unknown Source)
at jetbrains.vcs.server.hosting.git.repo.RepoCommandsImpl$2$1.execute(RepoCommandsImpl.java:98)
at jetbrains.vcs.server.hosting.git.repo.RepoPool$1.call(RepoPool.java:38)
at jetbrains.vcs.server.hosting.git.repo.RepoPool$1.call(RepoPool.java:35)
at jetbrains.vcs.server.hosting.git.util.ConnectionPool$ConnectionInfo.execute(ConnectionPool.java:71)
at jetbrains.vcs.server.hosting.git.util.ConnectionPool.execute(ConnectionPool.java:40)
at jetbrains.vcs.server.hosting.git.repo.RepoPool.repositoryCommand(RepoPool.java:35)
at jetbrains.vcs.server.hosting.git.repo.RepoCommandsImpl$2.execute(RepoCommandsImpl.java:90)
at __.upsource.__(JavaGeneratorTemplate.java:52)
at org.jonnyzzz.stack.NamedStackFrame.frame(NamedStackFrame.java:59)
at jetbrains.vcs.server.hosting.git.repo.RepoCommandsImpl.repositoryCommand(RepoCommandsImpl.java:87)
at jetbrains.vcs.server.hosting.git.ssh.GitCommandBase.execute(GitCommandBase.java:54)
at jetbrains.ssh.server.command.SSHExplicitCommandFactory$1$1$2.call(SSHExplicitCommandFactory.java:122)
at jetbrains.ssh.server.command.SSHExplicitCommandFactory$1$1$2.call(SSHExplicitCommandFactory.java:105)
at jetbrains.ssh.server.SSHLogger.ioMDC(SSHLogger.java:128)
at jetbrains.ssh.server.SSHLogger.MDC(SSHLogger.java:136)
at jetbrains.ssh.server.command.SSHExplicitCommandFactory$1$1.callImpl(SSHExplicitCommandFactory.java:105)
at jetbrains.ssh.server.command.SSHExplicitCommandFactory$1$1$1.apply(SSHExplicitCommandFactory.java:79)
at jetbrains.ssh.server.command.SSHExplicitCommandFactory$1$1$1.apply(SSHExplicitCommandFactory.java:76)
at jetbrains.vcs.server.settings.util.TimeLoggerImpl.logExecutionTime(TimeLoggerImpl.java:27)
at jetbrains.ssh.server.command.SSHExplicitCommandFactory$1$1.call(SSHExplicitCommandFactory.java:76)
at jetbrains.ssh.server.command.SSHExplicitCommandFactory$1$1.call(SSHExplicitCommandFactory.java:69)
at jetbrains.ssh.server.command.CommandThreadPool$1.call(CommandThreadPool.java:58)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at jetbrains.vcs.server.settings.util.DaemonThreadFactory$1.run(DaemonThreadFactory.java:32)
at java.lang.Thread.run(Thread.java:745){code}
was:
Command is running in the pooled thread and calls flush. Meanwhile, command staring code also calls flush (because of a bug from my side) to the same stream. Finally we have a deadlock if exception is thrown from channel
{code}
"sshd-nio2-14" Id=119 BLOCKED on org.apache.sshd.common.channel.ChannelOutputStream@26f0deaf owned by "ssh-commands-8" Id=175
at org.apache.sshd.common.channel.ChannelOutputStream.flush(ChannelOutputStream.java:118)
- blocked on org.apache.sshd.common.channel.ChannelOutputStream@26f0deaf
at jetbrains.vcs.server.settings.util.FileUtil.flushAndCatch(FileUtil.java:205)
at jetbrains.ssh.server.command.BaseCommand.start(BaseCommand.java:51)
at org.apache.sshd.server.channel.ChannelSession.handleExec(ChannelSession.java:495)
at org.apache.sshd.server.channel.ChannelSession.handleRequest(ChannelSession.java:330)
at org.apache.sshd.server.channel.ChannelSession$ChannelSessionRequestHandler.process(ChannelSession.java:680)
at org.apache.sshd.server.channel.ChannelSession$ChannelSessionRequestHandler.process(ChannelSession.java:673)
at org.apache.sshd.common.channel.AbstractChannel.handleRequest(AbstractChannel.java:153)
at org.apache.sshd.common.session.AbstractConnectionService.channelRequest(AbstractConnectionService.java:321)
at org.apache.sshd.common.session.AbstractConnectionService.process(AbstractConnectionService.java:194)
at org.apache.sshd.common.session.AbstractSession.doHandleMessage(AbstractSession.java:401)
at org.apache.sshd.common.session.AbstractSession.handleMessage(AbstractSession.java:349)
- locked java.lang.Object@521226a1
at org.apache.sshd.common.session.AbstractSession.decode(AbstractSession.java:848)
at org.apache.sshd.common.session.AbstractSession.messageReceived(AbstractSession.java:331)
- locked java.lang.Object@5df68b49
at jetbrains.ssh.server.SSHServerSessionEx.super_messageReceived(SSHServerSessionEx.java:49)
at jetbrains.ssh.server.SSHServerSessionEx.access$000(SSHServerSessionEx.java:12)
at jetbrains.ssh.server.SSHServerSessionEx$1.call(SSHServerSessionEx.java:28)
at jetbrains.ssh.server.SSHServerSessionEx$1.call(SSHServerSessionEx.java:25)
at jetbrains.ssh.server.SSHLogger.ioMDC(SSHLogger.java:128)
at jetbrains.ssh.server.SSHLogger.MDC(SSHLogger.java:136)
at jetbrains.ssh.server.SSHServerSessionEx.messageReceived(SSHServerSessionEx.java:25)
at org.apache.sshd.common.session.AbstractSessionIoHandler.messageReceived(AbstractSessionIoHandler.java:57)
at org.apache.sshd.common.io.nio2.Nio2Session$2.onCompleted(Nio2Session.java:220)
at org.apache.sshd.common.io.nio2.Nio2Session$2.onCompleted(Nio2Session.java:212)
at org.apache.sshd.common.io.nio2.Nio2CompletionHandler$1.run(Nio2CompletionHandler.java:34)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.completed(Nio2CompletionHandler.java:31)
at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126)
at sun.nio.ch.Invoker$2.run(Invoker.java:218)
at sun.nio.ch.AsynchronousChannelGroupImpl$1.run(AsynchronousChannelGroupImpl.java:112)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at jetbrains.vcs.server.settings.util.DaemonThreadFactory$1.run(DaemonThreadFactory.java:32)
at java.lang.Thread.run(Thread.java:745)
"sshd-nio2-38" Id=144 BLOCKED on java.lang.Object@521226a1 owned by "sshd-nio2-14" Id=119
at org.apache.sshd.common.session.AbstractSession.exceptionCaught(AbstractSession.java:505)
- blocked on java.lang.Object@521226a1
at jetbrains.ssh.server.SSHServerSessionEx.super_exceptionCaught(SSHServerSessionEx.java:53)
at jetbrains.ssh.server.SSHServerSessionEx.access$200(SSHServerSessionEx.java:12)
at jetbrains.ssh.server.SSHServerSessionEx$2.call(SSHServerSessionEx.java:42)
at jetbrains.ssh.server.SSHServerSessionEx$2.call(SSHServerSessionEx.java:36)
at jetbrains.ssh.server.SSHLogger.ioMDC(SSHLogger.java:128)
at jetbrains.ssh.server.SSHLogger.MDC(SSHLogger.java:136)
at jetbrains.ssh.server.SSHServerSessionEx.exceptionCaught(SSHServerSessionEx.java:36)
at org.apache.sshd.common.session.AbstractSessionIoHandler.exceptionCaught(AbstractSessionIoHandler.java:49)
at org.apache.sshd.common.io.nio2.Nio2Session.exceptionCaught(Nio2Session.java:137)
at org.apache.sshd.common.io.nio2.Nio2Session.access$500(Nio2Session.java:46)
at org.apache.sshd.common.io.nio2.Nio2Session$3.onFailed(Nio2Session.java:278)
at org.apache.sshd.common.io.nio2.Nio2CompletionHandler$2.run(Nio2CompletionHandler.java:45)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.failed(Nio2CompletionHandler.java:42)
at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:128)
at sun.nio.ch.Invoker$2.run(Invoker.java:218)
at sun.nio.ch.AsynchronousChannelGroupImpl$1.run(AsynchronousChannelGroupImpl.java:112)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at jetbrains.vcs.server.settings.util.DaemonThreadFactory$1.run(DaemonThreadFactory.java:32)
at java.lang.Thread.run(Thread.java:745)
"ssh-commands-8" Id=175 WAITING on org.apache.sshd.common.channel.Window@32ef1edd
at java.lang.Object.$$YJP$$wait(Native Method)
- waiting on org.apache.sshd.common.channel.Window@32ef1edd
at java.lang.Object.wait(Object.java)
at java.lang.Object.wait(Object.java:502)
at org.apache.sshd.common.channel.Window.waitForSpace(Window.java:175)
at org.apache.sshd.common.channel.ChannelOutputStream.flush(ChannelOutputStream.java:126)
- locked org.apache.sshd.common.channel.ChannelOutputStream@26f0deaf
at org.apache.sshd.common.channel.ChannelOutputStream.write(ChannelOutputStream.java:93)
- locked org.apache.sshd.common.channel.ChannelOutputStream@26f0deaf
at java.io.OutputStream.write(OutputStream.java:75)
at jetbrains.vcs.server.hosting.git.ssh.GitUploadPackCommand.executeImpl(GitUploadPackCommand.java:32)
at jetbrains.vcs.server.hosting.git.ssh.GitCommandBase.lambda$execute$7(GitCommandBase.java:54)
at jetbrains.vcs.server.hosting.git.ssh.GitCommandBase$$Lambda$83/2046592573.execute(Unknown Source)
at jetbrains.vcs.server.hosting.git.repo.RepoCommandsImpl$2$1.execute(RepoCommandsImpl.java:98)
at jetbrains.vcs.server.hosting.git.repo.RepoPool$1.call(RepoPool.java:38)
at jetbrains.vcs.server.hosting.git.repo.RepoPool$1.call(RepoPool.java:35)
at jetbrains.vcs.server.hosting.git.util.ConnectionPool$ConnectionInfo.execute(ConnectionPool.java:71)
at jetbrains.vcs.server.hosting.git.util.ConnectionPool.execute(ConnectionPool.java:40)
at jetbrains.vcs.server.hosting.git.repo.RepoPool.repositoryCommand(RepoPool.java:35)
at jetbrains.vcs.server.hosting.git.repo.RepoCommandsImpl$2.execute(RepoCommandsImpl.java:90)
at __.upsource.__(JavaGeneratorTemplate.java:52)
at org.jonnyzzz.stack.NamedStackFrame.frame(NamedStackFrame.java:59)
at jetbrains.vcs.server.hosting.git.repo.RepoCommandsImpl.repositoryCommand(RepoCommandsImpl.java:87)
at jetbrains.vcs.server.hosting.git.ssh.GitCommandBase.execute(GitCommandBase.java:54)
at jetbrains.ssh.server.command.SSHExplicitCommandFactory$1$1$2.call(SSHExplicitCommandFactory.java:122)
at jetbrains.ssh.server.command.SSHExplicitCommandFactory$1$1$2.call(SSHExplicitCommandFactory.java:105)
at jetbrains.ssh.server.SSHLogger.ioMDC(SSHLogger.java:128)
at jetbrains.ssh.server.SSHLogger.MDC(SSHLogger.java:136)
at jetbrains.ssh.server.command.SSHExplicitCommandFactory$1$1.callImpl(SSHExplicitCommandFactory.java:105)
at jetbrains.ssh.server.command.SSHExplicitCommandFactory$1$1$1.apply(SSHExplicitCommandFactory.java:79)
at jetbrains.ssh.server.command.SSHExplicitCommandFactory$1$1$1.apply(SSHExplicitCommandFactory.java:76)
at jetbrains.vcs.server.settings.util.TimeLoggerImpl.logExecutionTime(TimeLoggerImpl.java:27)
at jetbrains.ssh.server.command.SSHExplicitCommandFactory$1$1.call(SSHExplicitCommandFactory.java:76)
at jetbrains.ssh.server.command.SSHExplicitCommandFactory$1$1.call(SSHExplicitCommandFactory.java:69)
at jetbrains.ssh.server.command.CommandThreadPool$1.call(CommandThreadPool.java:58)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at jetbrains.vcs.server.settings.util.DaemonThreadFactory$1.run(DaemonThreadFactory.java:32)
at java.lang.Thread.run(Thread.java:745)
> Deadlock on stream flush in command from callback tread
> -------------------------------------------------------
>
> Key: SSHD-631
> URL: https://issues.apache.org/jira/browse/SSHD-631
> Project: MINA SSHD
> Issue Type: Bug
> Reporter: Eugene Petrenko
>
> Command is running in the pooled thread and calls flush. Meanwhile, command staring code also calls flush (because of a bug from my side) to the same stream. Finally we have a deadlock if exception is thrown from channel
> {code}
> "sshd-nio2-14" Id=119 BLOCKED on org.apache.sshd.common.channel.ChannelOutputStream@26f0deaf owned by "ssh-commands-8" Id=175
> at org.apache.sshd.common.channel.ChannelOutputStream.flush(ChannelOutputStream.java:118)
> - blocked on org.apache.sshd.common.channel.ChannelOutputStream@26f0deaf
> at jetbrains.vcs.server.settings.util.FileUtil.flushAndCatch(FileUtil.java:205)
> at jetbrains.ssh.server.command.BaseCommand.start(BaseCommand.java:51)
> at org.apache.sshd.server.channel.ChannelSession.handleExec(ChannelSession.java:495)
> at org.apache.sshd.server.channel.ChannelSession.handleRequest(ChannelSession.java:330)
> at org.apache.sshd.server.channel.ChannelSession$ChannelSessionRequestHandler.process(ChannelSession.java:680)
> at org.apache.sshd.server.channel.ChannelSession$ChannelSessionRequestHandler.process(ChannelSession.java:673)
> at org.apache.sshd.common.channel.AbstractChannel.handleRequest(AbstractChannel.java:153)
> at org.apache.sshd.common.session.AbstractConnectionService.channelRequest(AbstractConnectionService.java:321)
> at org.apache.sshd.common.session.AbstractConnectionService.process(AbstractConnectionService.java:194)
> at org.apache.sshd.common.session.AbstractSession.doHandleMessage(AbstractSession.java:401)
> at org.apache.sshd.common.session.AbstractSession.handleMessage(AbstractSession.java:349)
> - locked java.lang.Object@521226a1
> at org.apache.sshd.common.session.AbstractSession.decode(AbstractSession.java:848)
> at org.apache.sshd.common.session.AbstractSession.messageReceived(AbstractSession.java:331)
> - locked java.lang.Object@5df68b49
> at jetbrains.ssh.server.SSHServerSessionEx.super_messageReceived(SSHServerSessionEx.java:49)
> at jetbrains.ssh.server.SSHServerSessionEx.access$000(SSHServerSessionEx.java:12)
> at jetbrains.ssh.server.SSHServerSessionEx$1.call(SSHServerSessionEx.java:28)
> at jetbrains.ssh.server.SSHServerSessionEx$1.call(SSHServerSessionEx.java:25)
> at jetbrains.ssh.server.SSHLogger.ioMDC(SSHLogger.java:128)
> at jetbrains.ssh.server.SSHLogger.MDC(SSHLogger.java:136)
> at jetbrains.ssh.server.SSHServerSessionEx.messageReceived(SSHServerSessionEx.java:25)
> at org.apache.sshd.common.session.AbstractSessionIoHandler.messageReceived(AbstractSessionIoHandler.java:57)
> at org.apache.sshd.common.io.nio2.Nio2Session$2.onCompleted(Nio2Session.java:220)
> at org.apache.sshd.common.io.nio2.Nio2Session$2.onCompleted(Nio2Session.java:212)
> at org.apache.sshd.common.io.nio2.Nio2CompletionHandler$1.run(Nio2CompletionHandler.java:34)
> at java.security.AccessController.doPrivileged(Native Method)
> at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.completed(Nio2CompletionHandler.java:31)
> at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126)
> at sun.nio.ch.Invoker$2.run(Invoker.java:218)
> at sun.nio.ch.AsynchronousChannelGroupImpl$1.run(AsynchronousChannelGroupImpl.java:112)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at jetbrains.vcs.server.settings.util.DaemonThreadFactory$1.run(DaemonThreadFactory.java:32)
> at java.lang.Thread.run(Thread.java:745)
> "sshd-nio2-38" Id=144 BLOCKED on java.lang.Object@521226a1 owned by "sshd-nio2-14" Id=119
> at org.apache.sshd.common.session.AbstractSession.exceptionCaught(AbstractSession.java:505)
> - blocked on java.lang.Object@521226a1
> at jetbrains.ssh.server.SSHServerSessionEx.super_exceptionCaught(SSHServerSessionEx.java:53)
> at jetbrains.ssh.server.SSHServerSessionEx.access$200(SSHServerSessionEx.java:12)
> at jetbrains.ssh.server.SSHServerSessionEx$2.call(SSHServerSessionEx.java:42)
> at jetbrains.ssh.server.SSHServerSessionEx$2.call(SSHServerSessionEx.java:36)
> at jetbrains.ssh.server.SSHLogger.ioMDC(SSHLogger.java:128)
> at jetbrains.ssh.server.SSHLogger.MDC(SSHLogger.java:136)
> at jetbrains.ssh.server.SSHServerSessionEx.exceptionCaught(SSHServerSessionEx.java:36)
> at org.apache.sshd.common.session.AbstractSessionIoHandler.exceptionCaught(AbstractSessionIoHandler.java:49)
> at org.apache.sshd.common.io.nio2.Nio2Session.exceptionCaught(Nio2Session.java:137)
> at org.apache.sshd.common.io.nio2.Nio2Session.access$500(Nio2Session.java:46)
> at org.apache.sshd.common.io.nio2.Nio2Session$3.onFailed(Nio2Session.java:278)
> at org.apache.sshd.common.io.nio2.Nio2CompletionHandler$2.run(Nio2CompletionHandler.java:45)
> at java.security.AccessController.doPrivileged(Native Method)
> at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.failed(Nio2CompletionHandler.java:42)
> at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:128)
> at sun.nio.ch.Invoker$2.run(Invoker.java:218)
> at sun.nio.ch.AsynchronousChannelGroupImpl$1.run(AsynchronousChannelGroupImpl.java:112)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at jetbrains.vcs.server.settings.util.DaemonThreadFactory$1.run(DaemonThreadFactory.java:32)
> at java.lang.Thread.run(Thread.java:745)
> "ssh-commands-8" Id=175 WAITING on org.apache.sshd.common.channel.Window@32ef1edd
> at java.lang.Object.$$YJP$$wait(Native Method)
> - waiting on org.apache.sshd.common.channel.Window@32ef1edd
> at java.lang.Object.wait(Object.java)
> at java.lang.Object.wait(Object.java:502)
> at org.apache.sshd.common.channel.Window.waitForSpace(Window.java:175)
> at org.apache.sshd.common.channel.ChannelOutputStream.flush(ChannelOutputStream.java:126)
> - locked org.apache.sshd.common.channel.ChannelOutputStream@26f0deaf
> at org.apache.sshd.common.channel.ChannelOutputStream.write(ChannelOutputStream.java:93)
> - locked org.apache.sshd.common.channel.ChannelOutputStream@26f0deaf
> at java.io.OutputStream.write(OutputStream.java:75)
> at jetbrains.vcs.server.hosting.git.ssh.GitUploadPackCommand.executeImpl(GitUploadPackCommand.java:32)
> at jetbrains.vcs.server.hosting.git.ssh.GitCommandBase.lambda$execute$7(GitCommandBase.java:54)
> at jetbrains.vcs.server.hosting.git.ssh.GitCommandBase$$Lambda$83/2046592573.execute(Unknown Source)
> at jetbrains.vcs.server.hosting.git.repo.RepoCommandsImpl$2$1.execute(RepoCommandsImpl.java:98)
> at jetbrains.vcs.server.hosting.git.repo.RepoPool$1.call(RepoPool.java:38)
> at jetbrains.vcs.server.hosting.git.repo.RepoPool$1.call(RepoPool.java:35)
> at jetbrains.vcs.server.hosting.git.util.ConnectionPool$ConnectionInfo.execute(ConnectionPool.java:71)
> at jetbrains.vcs.server.hosting.git.util.ConnectionPool.execute(ConnectionPool.java:40)
> at jetbrains.vcs.server.hosting.git.repo.RepoPool.repositoryCommand(RepoPool.java:35)
> at jetbrains.vcs.server.hosting.git.repo.RepoCommandsImpl$2.execute(RepoCommandsImpl.java:90)
> at __.upsource.__(JavaGeneratorTemplate.java:52)
> at org.jonnyzzz.stack.NamedStackFrame.frame(NamedStackFrame.java:59)
> at jetbrains.vcs.server.hosting.git.repo.RepoCommandsImpl.repositoryCommand(RepoCommandsImpl.java:87)
> at jetbrains.vcs.server.hosting.git.ssh.GitCommandBase.execute(GitCommandBase.java:54)
> at jetbrains.ssh.server.command.SSHExplicitCommandFactory$1$1$2.call(SSHExplicitCommandFactory.java:122)
> at jetbrains.ssh.server.command.SSHExplicitCommandFactory$1$1$2.call(SSHExplicitCommandFactory.java:105)
> at jetbrains.ssh.server.SSHLogger.ioMDC(SSHLogger.java:128)
> at jetbrains.ssh.server.SSHLogger.MDC(SSHLogger.java:136)
> at jetbrains.ssh.server.command.SSHExplicitCommandFactory$1$1.callImpl(SSHExplicitCommandFactory.java:105)
> at jetbrains.ssh.server.command.SSHExplicitCommandFactory$1$1$1.apply(SSHExplicitCommandFactory.java:79)
> at jetbrains.ssh.server.command.SSHExplicitCommandFactory$1$1$1.apply(SSHExplicitCommandFactory.java:76)
> at jetbrains.vcs.server.settings.util.TimeLoggerImpl.logExecutionTime(TimeLoggerImpl.java:27)
> at jetbrains.ssh.server.command.SSHExplicitCommandFactory$1$1.call(SSHExplicitCommandFactory.java:76)
> at jetbrains.ssh.server.command.SSHExplicitCommandFactory$1$1.call(SSHExplicitCommandFactory.java:69)
> at jetbrains.ssh.server.command.CommandThreadPool$1.call(CommandThreadPool.java:58)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at jetbrains.vcs.server.settings.util.DaemonThreadFactory$1.run(DaemonThreadFactory.java:32)
> at java.lang.Thread.run(Thread.java:745){code}
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