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From André Warnier>
Subject Re: tomcat pausing and process killed
Date Thu, 10 May 2012 12:02:22 GMT

just a couple of general remarks.

Tomcat is an open-source project, developed and supported by volunteers.
These volunteers do not have all the time in the world, so they tend to focus first on the

current Tomcat version (7.x), a bit less on the previous version (6.x), and much less on 
the previous version (5.5).

You are running Tomcat 5.5, and you are having a problem with it.  And your problem, as 
you describe it, does not seem to be a very common problem experienced by a lot of users.

The first recommendation would be to upgrade your installation to Tomcat 7, or at least 
Tomcat 6.
That is because it may be that the problem that you are seeing, was due to some feature or

bug in Tomcat 5.5, that has been resolved in the meantime.
It also because, if the problem still happens in Tomcat 7, you are likely to get a lot 
more attention to it on the part of the developers and other volunteers on this list.

Next, about your issue :
It sounds very strange that you would have an error message in the error log about an 
invalid encoding of a request parameter, but that you cannot find that request in the 
access log.
It could also be a misconfiguration on your part.
Can you copy and paste your Tomcat "server.xml" here (removing all the comments and any 
confidential information please) ? (repeat : copy and paste in the message, not in a 
separate attachment; the list strips most attachments)

As Konstantin mentions separately, there are (a few) cases where Tomcat will not log an 
invalid request.

A solution in that case would be to set up an Apache httpd server in front of your Tomcat,

listening on the port on which Tomcat is listening now (presumably 80), and proxying all 
request to Tomcat (changing the Tomcat port to something else, e.g. 8080).  This is 
usually a rather simple setup, but if you have trouble doing that, ask.

Then the access log of Apache httpd may show what Tomcat does not show.

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