Hi Chuck,
There's nothing unusual in the logs indicating an OutOfMemory
exception. I recall PermGen throwing an exception or spitting out an error (at
least in non-WO apps), don't see that either. I think I'm dispatching requests
concurrently.... I have "-WOAllowsConcurrentRequestHandling YES" set on each
instance. I think that does it, no?
Thanks.
-Mike
-----Original Message-----
From: Chuck Hill [mailto:ch...@global-village.net]
Sent: Wednesday, November 28, 2012 3:39 PM
To: Michael Gargano
Cc: WebObjects-Dev List (webobjects-dev@lists.apple.com)
Subject: Re: production hanging
Try running jstack on them when the start not responding:
jstack -F <process id>
That will give you a thread dump and may show something.
Have you looked in the logs for OutOfMemory and HeapSpace? It could be running
out of PermGen space
Are you dispatching requests concurrently?
Chuck
On 2012-11-28, at 12:05 PM, Michael Gargano wrote:
> Hi all,
>
> I'm having an issue in our production environment. I have
> two servers (vm's w/ windows 2008 r2 64-bit) running two instances each. The
> servers are load balanced by a hardware load balancer that pings the app on
> each box every minute to determine if it is still up (because of the way our
> app works, this creates a session). After about a week of uptime, the each
> app instance seems to just stop responding to requests one at a time until no
> instances respond any more. The java processes are still always running, but
> nothing responds. I recently bumped up the mem. on the apps to 3G each, to
> see if that would help, but the same problem occurred. Any ideas why this
> might be happening? It's not good. Below is a sample of the app switches...
>
> -WOPort 2001 -WOCachingEnabled YES -WODebuggingEnabled NO -WOOutputPath
> c:/logs/log-1 -WOAutoOpenInBrowser NO -WOAutoOpenClientApplication NO
> -WOLifebeatInterval 120 -WOLifebeatEnabled YES -WOLifebeatDestinationPort
> 1085 -WOAdaptor WODefaultAdaptor -WOWorkerThreadCount 8 -WOListenQueueSize
> 128 -WOWorkerThreadCountMin 16 -WOWorkerThreadCountMax 256
> -NSProjectSearchPath () -WOSessionTimeOut 1800 -WOApplicationName eGM
> -WOMonitorEnabled YES -WONoPause YES -Xmx3g
> -WOAllowsConcurrentRequestHandling YES
>
>
> Thanks.
> -Mike
>
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