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Posted to dev@tomcat.apache.org by bu...@apache.org on 2015/06/23 09:27:41 UTC

[Bug 57783] NPE in SlowQueryReport - getQueryStats() returning null

https://bz.apache.org/bugzilla/show_bug.cgi?id=57783

Keiichi Fujino <kf...@apache.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #1 from Keiichi Fujino <kf...@apache.org> ---
Thanks for the report.

I examined the code of SlowQueryReport.
There were two problems that cause NPE.

The first is
Because SlowQueryReport#removeOldest has not been implemented correctly,
If multiple threads invoke the same query at the same time,
It is possible to return null.

The second is
If this Interceptor has executed a connection that had been closed by the
removeAbandoned,
It is possible to return null.

The former issue has been fixed in r1686791 and r1686792, the latter issue has
been fixed in r1686975 and r1686976.
These revisions are scheduled to be included in the release of Tomcat8.0.24,
Tomcat 7.0.63 or later.

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