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Message-ID: <46C5D7E9.9090501@mdl.com>
Date: Fri, 17 Aug 2007 10:16:25 -0700
From: Alexey Solofnenko <A.Solofnenko@mdl.com>
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To: Tomcat Users List <users@tomcat.apache.org>
Subject: Re: Java freezing at 100% usage, tomcat 5, java 5
References: <073301c7e0e5$83282f90$e4f31151@blacknight.local>
In-Reply-To: <073301c7e0e5$83282f90$e4f31151@blacknight.local>
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I do not know the answer. A similar behaviour happened with our servers=20
when finilizer dead-locked. In your case Finilizer did not dead-lock,=20
but it fails with exception and I do not know if it recovers after that. =

Try checking stack trace several times in a row and see what the=20
finilizer does.

"Finalizer" daemon prio=3D1 tid=3D0x0809d908 nid=3D0x4834 waiting for mon=
itor=20
entry [0xb24a1000..0xb24a1ea0]
at java.lang.Throwable.getStackTraceElement(Native Method)
at java.lang.Throwable.getOurStackTrace(Throwable.java:592)
- locked <0x792bef30> (a java.net.SocketException)
at java.lang.Throwable.printStackTrace(Throwable.java:511)
- locked <0x792bf368> (a java.io.PrintWriter)
at com.mysql.jdbc.Util.stackTraceToString(Util.java:291)
at=20
com.mysql.jdbc.CommunicationsException.<init>(CommunicationsException.jav=
a:186)
at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:2723)
at com.mysql.jdbc.MysqlIO.quit(MysqlIO.java:1401)
at com.mysql.jdbc.Connection.realClose(Connection.java:4882)
at com.mysql.jdbc.Connection.cleanup(Connection.java:2062)
at com.mysql.jdbc.Connection.finalize(Connection.java:3369)
at java.lang.ref.Finalizer.invokeFinalizeMethod(Native Method)
at java.lang.ref.Finalizer.runFinalizer(Finalizer.java:83)
at java.lang.ref.Finalizer.access$100(Finalizer.java:14)
at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:160)


- Alexey.

Jimmy Phelan :: Blacknight Solutions wrote:
> <!-- /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal=20
> {margin:0cm; margin-bottom:.0001pt; font-size:12.0pt;=20
> font-family:"Times New Roman";} a:link, span.MsoHyperlink {color:blue; =

> text-decoration:underline;} a:visited, span.MsoHyperlinkFollowed=20
> {color:purple; text-decoration:underline;} span.EmailStyle17=20
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> color:windowtext;} @page Section1 {size:595.3pt 841.9pt; margin:72.0pt =

> 90.0pt 72.0pt 90.0pt;} div.Section1 {page:Section1;} -->
>
> Hi All
>
> We are using tomcat 5 on a shared hosting server. The server is=20
> running DirectAdmin as its control panel. It is running RedHat=20
> Enterprise 4, tomcat 5.5.23 and jvm 1.5.0_08-b03
>
> I have attached a stack trace (from kill -3)
>
> We are using a plugin from da-plugin.com to use tomcat in DirectAdmin, =

> but the support on this is less than stellar, and we don=92t believe it=
=20
> to be the issue
>
> What seems to be happening is that every now and again the java=20
> process jumps to 100% usage, and sticks. Only a service tomcatd=20
> restart will kill it and restart the server
>
> Tomcat 5 has the following variables enables in its process
>
> -Xmx512M=20
> -Djava.util.logging.manager=3Dorg.apache.juli.ClassLoaderLogManager=20
> -Djava.util.logging.config.file=3D/usr/local/tomcat/conf/logging.proper=
ties=20
> -Djava.endorsed.dirs=3D/usr/local/tomcat/common/endorsed -classpath=20
> :/usr/local/tomcat/bin/bootstrap.jar:/usr/local/tomcat/bin/commons-logg=
ing-api.jar=20
> -Dcatalina.base=3D/usr/local/tomcat -Dcatalina.home=3D/usr/local/tomcat=
=20
> -Djava.io.tmpdir=3D/usr/local/tomcat/temp=20
> org.apache.catalina.startup.Bootstrap start
>
> We are also running tomcat-4 in tandem with tomcat 5, it runs with the =

> following variables
>
> -Djava.endorsed.dirs=3D/usr/local/tomcat.4.1.33/common/endorsed=20
> -classpath=20
> /usr/local/java/lib/tools.jar:/usr/local/tomcat.4.1.33/bin/bootstrap.ja=
r=20
> -Dcatalina.base=3D/usr/local/tomcat.4.1.33=20
> -Dcatalina.home=3D/usr/local/tomcat.4.1.33=20
> -Djava.io.tmpdir=3D/usr/local/tomcat.4.1.33/temp=20
> org.apache.catalina.startup.Bootstrap start
>
> We have been trying to sort this out for a while, but cant see=20
> anything, can anyone else?
>
> Jimmy
>
> -----------------------------------------------------------------------=
-
>
> ---------------------------------------------------------------------
> To start a new topic, e-mail: users@tomcat.apache.org
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
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--=20
------------------------------------------------------------------------
Alexey N. Solofnenko <http://trelony.cjb.net/>
Pleasant Hill, CA (GMT-8 usually)


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