DO NOT REPLY [Bug 37150] New: - denial of service on many and long requests on v5.5.x

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http://issues.apache.org/bugzilla/show_bug.cgi?id=37150

           Summary: denial of service on many and long requests on v5.5.x
           Product: Tomcat 5
           Version: 5.5.0
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: major
          Priority: P2
         Component: Catalina
        AssignedTo: tomcat-dev@jakarta.apache.org
        ReportedBy: david.maciejak@gmail.com


Hi,

I find some time to try to understand why sometimes my tomcat burns the CPU

The fact:
with long request (for example complex jsp or big dir listing) and if there is
more than 1 simultaneous connection (is easy to reproduce the case with many
connections); catalina stop responding, java takes all the CPU!

I have tested that with default conf (perhaps there are some parameters to
tune), I have create many files in a directory and many threads trying to get
the directory listing.

Tomcat version from 5.5.0 to 5.5.11 included are vulnerable, 5.5.12 seems to be
ok. I have not tested older version.

Have I missed something in the conf ?

cheers

David Maciejak

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