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From Steve Suppe <ssu...@llnl.gov>
Subject Re: Server Socket Timeout Woes
Date Wed, 23 Apr 2008 20:39:57 GMT
Hello again,

I think you are 100% right here.  I managed to roll back to my patched 
version of UIMA 2.1.0.  In this one, I implemented the pool of threads as 
automatically expandable.  This seemed to solve all of our problems, and 
things are chugging away very happily now.

I know this is the user group, but is this something I should look to 
contributing somehow?

Thanks for the brainstorm, guys!


At 07:38 PM 4/22/2008, you wrote:
>On Tue, Apr 22, 2008 at 6:51 PM, Steve Suppe <ssuppe@llnl.gov> wrote:
> > Hi all,
> >
> >  Thanks so much for this list - I'm constantly lurking and learning things
> > :)
> >
> >  I'm having trouble with our distributed cluster - our setup is as follows:
> >
> >  We have a 'reader' node reading from the local FS, 15 'worker' nodes each
> > running identical aggregates of analysis and consumers that connect to an
> > oracle DB for final storing of data results.  On each worker I have 
> multiple
> > instances running, typically 32, so I have 15x32 connections to Oracle.  I
> > have about 20,000,000 documents to process.
> >
> >  After a certain amount of time, I start to get Broken Pipe server socket
> > exceptions, of the following:
> >  <snip/>
>I'm not completely sure, but this might be related to this JIRA issue:
>http://issues.apache.org/jira/browse/UIMA-821.  I ran into this
>problem when I had a large number of clients trying to connect to a
>Vinci service, just like what you're doing.  The Vinci service has a
>default thread pool of size 20 - if there are more clients than that,
>things didn't work right.  The first 20 clients hogged all the threads
>and the other clients couldn't get in.
>UIMA 2.2.2 will allow you to configure the server thread pool size so
>this problem doesn't occur.  Hopefully this release will be out soon -
>it is currently up for an approval vote from the Apache Incubator.
>  -Adam

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