[jboss-jira] [JBoss JIRA] Commented: (JBAS-7102) Problem sending large files via farm service

[Brian Stansberry (JIRA)]

    [ https://jira.jboss.org/jira/browse/JBAS-7102?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12488309#action_12488309 ] 

Brian Stansberry commented on JBAS-7102:
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I've added a test that farms a 150MB file[1] and it passes, with the test taking < 25 secs to run (which includes time to write out the 150MB file).

I'll comment in more detail on the forum thread, but here are a couple suggestions:

1) Stop the hot deployment scanner thread before doing lengthy I/O operations (e.g. copying in files) in the farm/ (or deploy/) folders. Then restart it when I/O is done. This avoids the hot deployment scanning running and seeing partially completed I/O.

The scanner can be stopped by invoking the JMX stop() operation on the jboss.deployment:flavor=URL,type=DeploymentScanner MBean. This can be done via the jmx-console or via the twiddle utility in $JBOSS_HOME/bin.

2) Make sure your network is tuned to limit losses of UDP packets. Among other things, increase the OS maximum network read and write buffers; e.g. on Linux

sysctl -w net.core.rmem_max=26214400
sysctl -w net.core.wmem_max=1048576

[1] https://svn.jboss.org/repos/jbossas/branches/Branch_5_x/testsuite/src/main/org/jboss/test/cluster/defaultcfg/profileservice/test/FarmedClusterHugeDeploymentUnitTestCase.java

> Problem sending large files via farm service
> --------------------------------------------
>
>                 Key: JBAS-7102
>                 URL: https://jira.jboss.org/jira/browse/JBAS-7102
>             Project: JBoss Application Server
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: Clustering, ProfileService
>    Affects Versions: JBossAS-5.1.0.GA
>            Reporter: Brian Stansberry
>            Assignee: Brian Stansberry
>            Priority: Critical
>             Fix For: JBossAS-6.0.0.Alpha1
>
>
> Users have reported issues sending large files over the AS 5.1 farming service; see forum thread.

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