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From Filip Hanik - Dev Lists <devli...@hanik.com>
Subject Re: NIO Connector: "Possible key leak"
Date Wed, 27 May 2009 12:45:44 GMT
Christopher Schultz wrote:
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> All,
>
> (I have no idea why my messages are getting messed-up... apologies for
> the empty messages... I swear I'm sending whole messages!)
>
> During performance testing, I got the following warnings in
> catalina.out. I'm using the NIO connector (along with the NIO connector
> with sendFile disabled) from Apache 6.0.20 along with tcnative 1.1.16 on
> a 32-bit JVM on Linux:
>
> java version "1.6.0_13"
> Java(TM) SE Runtime Environment (build 1.6.0_13-b03)
> Java HotSpot(TM) Client VM (build 11.3-b02, mixed mode, sharing)
>
> These are the warnings I received:
>
> May 23, 2009 5:03:20 AM
> org.apache.tomcat.util.net.NioBlockingSelector$KeyReference finalize
> WARNING: Possible key leak, cancelling key in the finalizer.
> May 23, 2009 12:23:40 PM
> org.apache.tomcat.util.net.NioBlockingSelector$KeyReference finalize
> WARNING: Possible key leak, cancelling key in the finalizer.
> May 23, 2009 12:23:50 PM
> org.apache.tomcat.util.net.NioBlockingSelector$KeyReference finalize
> WARNING: Possible key leak, cancelling key in the finalizer.
> May 23, 2009 12:23:58 PM
> org.apache.tomcat.util.net.NioBlockingSelector$KeyReference finalize
> WARNING: Possible key leak, cancelling key in the finalizer.
> May 23, 2009 12:24:03 PM
> org.apache.tomcat.util.net.NioBlockingSelector$KeyReference finalize
> WARNING: Possible key leak, cancelling key in the finalizer.
> May 23, 2009 12:24:38 PM
> org.apache.tomcat.util.net.NioBlockingSelector$KeyReference finalize
> WARNING: Possible key leak, cancelling key in the finalizer.
> May 23, 2009 12:32:55 PM
> org.apache.tomcat.util.net.NioBlockingSelector$KeyReference finalize
> WARNING: Possible key leak, cancelling key in the finalizer.
> May 23, 2009 12:32:55 PM
> org.apache.tomcat.util.net.NioBlockingSelector$KeyReference finalize
> WARNING: Possible key leak, cancelling key in the finalizer.
>
> Should I be concerned about this? Unfortunately, I stopped Tomcat before
> I saw this error, so I can't inspect the heap or anything like that.
>   
Its a warning that the key shows isValid()==true when the finalizer has 
been invoked, and that the key is being closed.
It should not affect your system, since the key is being cancelled out.
If you have a test that you are running, I can reproduce it, and make 
the warning go away

best
Filip

> - -chris
>
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