[jira] Commented: (DERBY-3110) server hangs after trace on command fails

["Kathey Marsden (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/DERBY-3110?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12585265#action_12585265 ] 

Kathey Marsden commented on DERBY-3110:
---------------------------------------

I am thinking this may be a problem with synchronization with Derby rather than a problem with the JVM. The thread dump shows a ping thread waiting for response from the server and ClientThread waiting to accept connections.  If I try to ping the server once the hang occurs my client hangs, as though, the ClientThread is accepting connections, but not designating a thread to pick them up.


> server hangs after trace on command fails
> -----------------------------------------
>
>                 Key: DERBY-3110
>                 URL: https://issues.apache.org/jira/browse/DERBY-3110
>             Project: Derby
>          Issue Type: Bug
>          Components: Network Server
>    Affects Versions: 10.3.1.4
>            Reporter: Sebb
>            Assignee: Kathey Marsden
>             Fix For: 10.3.2.1, 10.4.0.0
>
>         Attachments: derby-3110_diff.txt, derby-3110_diff2.txt, derby-3110_stat.txt, derby-3110_stat2.txt, derby-3110_test_diff.txt
>
>
> Tried turning on trace:
> >networkservercontrol  trace on
> Invalid reply from network server: Insufficient data.
> The server process shows the following stack trace:
> access denied (java.io.FilePermission Server58.trace write)
> java.security.AccessControlException: access denied (java.io.FilePermission Server58.trace write)
>         at java.security.AccessControlContext.checkPermission(AccessControlContext.java:269)
>         at java.security.AccessController.checkPermission(AccessController.java:401)
>         at java.lang.SecurityManager.checkPermission(SecurityManager.java:524)
>         at java.lang.SecurityManager.checkWrite(SecurityManager.java:954)
>         at java.io.FileOutputStream.<init>(FileOutputStream.java:169)
>         at java.io.FileOutputStream.<init>(FileOutputStream.java:70)
>         at java.io.FileWriter.<init>(FileWriter.java:46)
>         at org.apache.derby.impl.drda.DssTrace.startComBufferTrace(Unknown Source)
>         at org.apache.derby.impl.drda.Session.initTrace(Unknown Source)
>         at org.apache.derby.impl.drda.Session.setTraceOn(Unknown Source)
>         at org.apache.derby.impl.drda.NetworkServerControlImpl.setTrace(Unknown Source)
>         at org.apache.derby.impl.drda.NetworkServerControlImpl.processCommands(Unknown Source)
>         at org.apache.derby.impl.drda.DRDAConnThread.sessionInitialState(Unknown Source)
>         at org.apache.derby.impl.drda.DRDAConnThread.run(Unknown Source)
> The server now does not respond to ping or shutdown, and has to be killed.
> See also DERBY-3103

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