5 Replies Latest reply on Oct 5, 2007 3:16 PM by brian.stansberry

JBAS-4766 Discussion thread

brian.stansberry Oct 3, 2007 5:52 PM

Discussion of test failure reported in http://jira.jboss.com/jira/browse/JBAS-4766

Dominik,

Want to make sure I understand the logs correctly. Basically 2 out of 100 clients lost their session. This happened as follows (highlights from test.log):

10:57:34:767 Starting driver.
10:58:50:328 Driver stopped.
10:59:00:803 Node 0 is down.
10:59:00:803 Starting driver.
11:00:10:955 Driver stopped.
11:00:39:102 Node 0 is up.
11:00:39:102 Starting driver.
11:01:39:380 Stopping driver.
11:01:59:484 Failing node 1
11:02:00:247 Starting driver.

At this point you got failures. The kill/restart of node0 went OK, but then when node1 was killed 2 of 100 sessions were lost.

Does that summarize it correctly?

1. Re: JBAS-4766 Discussion thread

brian.stansberry Oct 3, 2007 5:55 PM (in response to brian.stansberry)

Looks like client 94 also lost a session when node3 was stopped.
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2. Re: JBAS-4766 Discussion thread

brian.stansberry Oct 3, 2007 6:48 PM (in response to brian.stansberry)
The perf03 log is showing missing responses to data gravitation requests. Due to timeout. Dominik, can you change the buddy replication config in the jboss-web-cluster.sar/META-INF/jboss-service.xml and see what happens:

<buddyCommunicationTimeout>20000</buddyCommunicationTimeout>

We want 20 secs instead of 2 secs.

Manik, since this param drives the wait time for data gravitation, does it make sense to you that in general the value should be the same as SyncReplTimeout?

I'd thought it was only used for the group formation messages; even there 2 secs is probably too low.
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3. Re: JBAS-4766 Discussion thread

dpospisil Oct 4, 2007 4:41 AM (in response to brian.stansberry)

"bstansberry@jboss.com" wrote:
Discussion of test failure reported in http://jira.jboss.com/jira/browse/JBAS-4766

At this point you got failures. The kill/restart of node0 went OK, but then when node1 was killed 2 of 100 sessions were lost.

Does that summarize it correctly?

Yes, that's correct. However, that's not the rule. During other test runs, sessions were lost even when first node failed.
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4. Re: JBAS-4766 Discussion thread

brian.stansberry Oct 4, 2007 10:37 AM (in response to brian.stansberry)

Yep; I continued digging and found the issue discussed in my last post. That could crop up at any point.
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5. Re: JBAS-4766 Discussion thread

brian.stansberry Oct 5, 2007 3:16 PM (in response to brian.stansberry)

Cause is http://jira.jboss.com/jira/browse/JBCACHE-1194 .
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