Error with "All threads (...) are currently busy" on Red Hat

[Brad McEvoy <br...@massive.com.au>]

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/msg132875.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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