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Date: Fri, 9 Mar 2012 12:30:57 +0000 (UTC)
From: "Knut Anders Hatlen (Commented) (JIRA)" <jira@apache.org>
To: derby-dev@db.apache.org
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Subject: [jira] [Commented] (DERBY-5643) Occasional hangs in replication
 tests on Linux
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    [ https://issues.apache.org/jira/browse/DERBY-5643?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13226041#comment-13226041 ] 

Knut Anders Hatlen commented on DERBY-5643:
-------------------------------------------

I ran ReplicationSuite in a loop on one of the machines where this was seen, and after a couple of iterations it was stuck. I ran the suite with derby.tests.repltrace=true, and the trace indicated that the slave server used more than 3 minutes to get up and accept connections. ReplicationRun.startServer() pings the server for 75 seconds before it gives up, so it gave up before the server was up. The attempt to shut down the slave server also failed, because a connection to the server could not be established. tearDown() ended up waiting for the server to stop, and the server of course didn't stop since it never received the shutdown command.

So the question is: Why does it take 3 minutes for the server to start accepting connections?
                
> Occasional hangs in replication tests on Linux
> ----------------------------------------------
>
>                 Key: DERBY-5643
>                 URL: https://issues.apache.org/jira/browse/DERBY-5643
>             Project: Derby
>          Issue Type: Bug
>          Components: Replication, Test
>    Affects Versions: 10.9.0.0
>            Reporter: Knut Anders Hatlen
>         Attachments: thread-dump.txt
>
>
> We occasionally see hangs in the replication tests on Linux. For example here: http://dbtg.foundry.sun.com/derby/test/Daily/jvm1.6/testing/testlog/sles/1298470-suitesAll_diff.txt
> This test run was stuck in tearDown() after ReplicationRun_Local_Derby4910.testSlaveWaitsForMaster(). (Waiting for Thread.join() to return.)

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