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From "Ralph Einfeldt" <ralph.einfe...@uptime-isc.de>
Subject RE: Error with "All threads (...) are currently busy" on Red Hat
Date Fri, 06 Aug 2004 06:31:26 GMT

Create a thread dump to see how many threads you 
have and what they are doing.

kill -QUIT <tomcat pid> 

This will just produce a thread dump and not stop tomcat.

The output will get to catalina.out unless you have 
mapped stdout to a different file.

> -----Original Message-----
> From: Brad McEvoy [mailto:bradmc@massive.com.au]
> Sent: Friday, August 06, 2004 8:20 AM
> To: 'tomcat-user@jakarta.apache.org'
> Subject: Error with "All threads (...) are currently busy" on Red Hat
> 
> 
> 
> Our tomcat server freezes intermittently, without any 
> identifiable cause,
> giving a message like "All threads (xxx) are currently busy, 
> waiting". At
> first I assumed that some bug with our java code was causing 
> requests to
> hang indefinitely and they were accumulating over time to 
> cause this, but
> I've added diagnostics code to detect that condition and it 
> appears not to
> be the case.
> 
> A similar problem was reported recently at
> http://www.mail-archive.com/tomcat-user@jakarta.apache.org/msg
132875.html

However, the resolution to that referred to problematic versions which we
aren't using

Our exact versions are below..

linux Red Hat EL
kernel 2.4.21-17.ELsmp  (as per recommendation on Bug 120341 for ibm blades)
tomcat 4.1.30
apache 2.0.49
mod_jk 2.04
glibc 2.3.2-95.20
java 1.4.2_02 - Sun VM


Any help would be greatly appreciated,
Brad McEvoy

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