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From abdulkadir yaman <abdulkadirya...@gmail.com>
Subject Re: Apache ODE 1.3.5 - In Memory Execution - How stable ?
Date Thu, 24 Jan 2013 16:41:09 GMT
Dear Arun,

Have you had a chance to take a snapshot of the memory while ode freezes
before restarting servicemix? If you investigate the memory dump you will
going to have a chance to find the leak.


On Thu, Jan 24, 2013 at 6:22 PM, arunjolly <jollyarun@gmail.com> wrote:

> Hi,
> We use apache ode 1.3.3 inside Servicemix 3.3.2 for implementing our
> workflows. When the load increases (ie number of flow invocations per unit
> time ), ode freezes, stops processing new requests and hangs. Usullay, we
> solve the issue by doing a Servicemix restart after a cleanup of the 'data'
> folder.
> Initially, i thought that this was a thread problem ( lack of threads for
> ode to use ). After increasing the 'thread pool size' in
> ode-jbi.properties,
> this problem got addressed to an extend. But still, under heavy load, ode
> continues to hang.
> Further investigation, with additional logging revealed that under heavy
> load, ode is unable to get enough connections to the DB
> (NoManagedConnectionException ) to persist its state. Our ode persistence
> configuration is INTERNAL (refer to ode-jbi.db.mode=INTERNAL ) where the
> connection pool is maintained by the container/runtime itself. Efforts to
> migrate it to a EXTERNAL jndi datasource configuration ( where we can
> configure the connection pool parameters ) has not yet borne fruit ( Thanks
> to my inability to comprehend the zillion errors that keep cropping up at
> each stage :( :) )
> So i tried the other available option, 'In-Memory execution' of my
> processes. This works fine in a 'test setup' and it no longer throws the
> 'NoManageConnectionException' under simulated load.
> But i have a few concerns about moving this to PROD.  How different is
> In-Memory execution different from 'persisted' execution ? How much more
> memory will this consume ? Will this affect the reliability of my PROD
> setup
> by causing 'OutOfMemoryOutages'.
> We have about 10 deployed bpel processes. And the load (no. of requests
> )...well it is usually minimal, but sometimes spikes up ( that's where i
> need my processes to run really fast but without causing any OutOfMemory
> PROD outages...hopefully :D :) :P )
> Need your thoughts, suggestions and advice on this.
> Thanks in advance,
> Arun
> --
> View this message in context:
> http://old.nabble.com/Apache-ODE-1.3.5---In-Memory-Execution---How-stable---tp34941139p34941139.html
> Sent from the Apache Ode User mailing list archive at Nabble.com.

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