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https://issues.apache.org/jira/browse/DERBY-3869?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kathey Marsden updated DERBY-3869:
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Attachment: derby-3869_sleep_to_force_hang_diff.txt
If I add in this sleep after interupting the client thread, and closing the
sessions, but before closing down the connection threads and closing the server
socket, I can reproduce the hang on windows.
Sleeps in other places cause protocol errors, but no hang. Ideally we wouldn't
want shutdown to return until the server is totally shutdown, but that is not
really possible since we wouldn't be able to return confirmation of the
shutdown. Even if we could, a ping or connection attempt that came in during
the shutdown process might potentially hang.
> intermittent hang pinging server on Linux
> ------------------------------------------
>
> Key: DERBY-3869
> URL: https://issues.apache.org/jira/browse/DERBY-3869
> Project: Derby
> Issue Type: Bug
> Components: Network Server
> Affects Versions: 10.5.0.0
> Environment: java version "1.6.0"
> Java(TM) SE Runtime Environment (build pxi3260sr1-20080416_01(SR1))
> IBM J9 VM (build 2.4, J2RE 1.6.0 IBM J9 2.4 Linux x86-32
> jvmxi3260-20080415_1876
> J9VM - 20080415_018762_lHdSMr
> JIT - r9_20080415_1520
> GC - 20080415_AA)
> JCL - 20080412_01
> Reporter: Kathey Marsden
> Attachments: derby-3869_sleep_to_force_hang_diff.txt, derby.log,
> javacore.20080903.183815.7684.0001.txt, Repro.java
>
>
> am looking at a intermittent hang with IBM 1.6 on Linux with the ping
> command. I am not entirely sure it is a jvm issue, but I have not been
> able to reproduce the hang with other jvms.
> The trace is
> 3XMTHREADINFO "main" TID:0x08072500, j9thread_t:0x08057AF4, state:R,
> prio=5
> 3XMTHREADINFO1 (native thread ID:0x1E05, native priority:0x5,
> native policy:UNKNOWN)
> 4XESTACKTRACE at java/net/SocketInputStream.socketRead0(Native
> Method)
> 4XESTACKTRACE at
> java/net/SocketInputStream.read(SocketInputStream.java:140)
> 4XESTACKTRACE at
> java/net/SocketInputStream.read(SocketInputStream.java:101)
> 4XESTACKTRACE at
> org/apache/derby/impl/drda/NetworkServerControlImpl.fillReplyBuffer(NetworkServerControlImpl.java:2764)
> 4XESTACKTRACE at
> org/apache/derby/impl/drda/NetworkServerControlImpl.readResult(NetworkServerControlImpl.java:2708)
> 4XESTACKTRACE at
> org/apache/derby/impl/drda/NetworkServerControlImpl.pingWithNoOpen(NetworkServerControlImpl.java:1169)
> 4XESTACKTRACE at
> org/apache/derby/impl/drda/NetworkServerControlImpl.ping(NetworkServerControlImpl.java:1144(Compiled
> Code))
> 4XESTACKTRACE at
> org/apache/derby/drda/NetworkServerControl.ping(NetworkServerControl.java:395(Compiled
> Code))
> 4XESTACKTRACE at Repro.pingForServerUp(Repro.java:38(Compiled Code))
> 4XESTACKTRACE at Repro.startAndShutdown(Repro.java:20)
> The client has sent the ping, but there is no corresponding session on
> the server side to process the
> command. The full thread dump is in.
> javacore.20080903.183815.7684.0001.txt
> The program Repro.java shows the problem. It repeatedly starts the server,
> pings until it
> comes up, and then shuts down.
> In the derby.log I see a startup error, that the address is already in
> use, so presumably the shutdown is not complete before we start the
> server and then perhaps it shuts down mid ping causing the hang?
> 2008-09-04 01:37:51.048 GMT : Could not listen on port 1527 on host 127.0.0.1:
> java.net.BindException: Address already in use
> An exception was thrown during network server startup.
> DRDA_ListenPort.S:Could not listen on port 1527 on host 127.0.0.1:
> java.net.BindException: Address already in use
> java.lang.reflect.InvocationTargetException
> at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
> at java.lang.reflect.Method.invoke(Method.java:599)
> at
> org.apache.derby.iapi.jdbc.DRDAServerStarter.run(DRDAServerStarter.java:236)
> at java.lang.Thread.run(Thread.java:735)
> Caused by: java.lang.Exception: DRDA_ListenPort.S:Could not listen on port
> 1527 on host 127.0.0.1:
> java.net.BindException: Address already in use
> at java.lang.Throwable.<init>(Throwable.java:67)
> at
> org.apache.derby.impl.drda.NetworkServerControlImpl.consolePropertyMessageWork(NetworkServerControlImpl.java:3179)
> at
> org.apache.derby.impl.drda.NetworkServerControlImpl.consolePropertyMessage(NetworkServerControlImpl.java:1861)
> at
> org.apache.derby.impl.drda.NetworkServerControlImpl.blockingStart(NetworkServerControlImpl.java:731)
> ... 5 more
> Full log is attached as derby.log
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