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From Christopher Schultz <ch...@christopherschultz.net>
Subject Re: Tomcat 7 Feedback on memory leak detection/prevention
Date Wed, 10 Nov 2010 16:57:08 GMT
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Rohit,

On 11/10/2010 9:40 AM, Rohit Kelapure wrote:
> I'm impressed by the level of in-depth analysis and actions that have been
> taken to build leak detection, prevention and remediation in Tomcat 7.
> I was wondering if users had any feedback on how effective the memory leak
> detection/prevention features has been in practice/production?

You can read Mark's presentation from ApacheCon NA 2010 here:
http://people.apache.org/~markt/presentations/2010-11-04-Memory-Leaks-60mins.pdf

I recall that he said during the presentation that it had resulted in
the correction of many bugs in 3rd-party libraries such as log4j --
can't remember any others off-hand.

While these leak-prevention strategies haven't helped on my own
projects, we've seen a lot of folks posting to the list recently who are
seeing the warning messages and, as a result, looking into their own
code and libraries to find these leaks and fix them. In the cases where
people actually post-back after they fix things, it's usually 50/50
application code holding references or a 3rd-party library. We always
encourage the "library" folks to upgrade to the latest version of their
library, and to report any lingering bugs that Tomcat detects to those
maintainers.

- -chris
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