Sorry if what I wrote was confusing, actually I have installed YourKit profiler
and am profiling my tomcat. On checking or blocking threads I get to see the
following,
Blocker Thread QuartzSchedular_Worker-6 native ID ..
On clicking on the Blocker thread it shows me the following,
--org.apache.log4j.Category.callAppenders
--com.mysql.jdbc.SingleByteCharsetConverter.getInstance
--org.apache.tomcat.dbcp.pool.impl.GenericObjectPool.borrorObject()
--org.apache.tomcat.dbcp.pool.impl.GenericObjectPool.addObjectToPool()
--ogr.apache.tomcat.dbcp.pool.impl.GenericObjectPool.getNumIdle
As I am new to this I am not sure what might be causing this, is it log4j
or something else like dbcp pool.
Help appreciated.
Ayush.
> Date: Tue, 12 Feb 2013 18:45:03 +0000
> From: p...@pidster.com
> To: users@tomcat.apache.org
> Subject: Re: Tomcat hanging unexpectedly [URGENT]
>
> On 12/02/2013 18:42, Cool Techi wrote:
> > I am not logging to database, these are my appenders,
>
> You posted the below in a previous message. It was in a single
> unintelligible line. Perhaps you could clarify what you intended to
> post and try again?
>
> org.apache.log4j.Category.callAppenders
> com.mysql.jdbc.SingleByteCharsetConverter.getInstance
> org.apache.tomcat.dbcp.pool.impl.GenericObjectPool.borrorObject()
> org.apache.tomcat.dbcp.pool.impl.GenericObjectPool.addObjectToPool()
> ogr.apache.tomcat.dbcp.pool.impl.GenericObjectPool.getNumIdle
>
>
> p
>
>
> > <appender name="errorfile"
> > class="org.apache.log4j.DailyRollingFileAppender">
> > <param name="File" value="D:/Logs/errorVer.log" />
> > <param name="threshold" value="error" />
> > <layout class="org.apache.log4j.PatternLayout">
> > <param name="ConversionPattern" value="%d{yyyy-MMM-dd
> > HH:mm:ss,SSS} %5p %c{1}:%L - %m%n" />
> > </layout>
> > </appender>
> >
> > <appender name="debugfile"
> > class="org.apache.log4j.DailyRollingFileAppender">
> > <param name="File" value="D:/Logs/debugVer.log" />
> > <layout class="org.apache.log4j.PatternLayout">
> > <param name="ConversionPattern" value="%d{yyyy-MMM-dd
> > HH:mm:ss,SSS} %5p %c{1}:%L - %m%n" />
> > </layout>
> > <filter class="org.apache.log4j.varia.LevelRangeFilter">
> > <param name="LevelMin" value="debug" />
> > <param name="LevelMax" value="debug" />
> > </filter>
> > </appender>
> >
> > regards,
> > Ayush
> >
> >> Date: Tue, 12 Feb 2013 18:38:24 +0000
> >> From: p...@pidster.com
> >> To: users@tomcat.apache.org
> >> Subject: Re: Tomcat hanging unexpectedly [URGENT]
> >>
> >> On 12/02/2013 17:53, Cool Techi wrote:
> >>>
> >>>
> >>>
> >>> I am new to this, I have just installed YourKit and see a lot of threads
> >>> blocked,but currently my response are fine, the blocked thread are
> >>> showing the following
> >>>
> >>> Blocker Thread QuartzSchedular_Worker-6 native ID ..
> >>>
> >>> On clicking on the Blocker thread it shows me the following,
> >>>
> >>>
> >>>
> >>> org.apache.log4j.Category.callAppenderscom.mysql.jdbc.SingleByteCharsetConverter.getInstanceorg.apache.tomcat.dbcp.pool.impl.GenericObjectPool.borrorObject()org.apache.tomcat.dbcp.pool.impl.GenericObjectPool.addObjectToPool()ogr.apache.tomcat.dbcp.pool.impl.GenericObjectPool.getNumIdle
> >>> Does any of these sound like reason. It would be great to get pointed in
> >>> the right direction.
> >>> Regards,Ayush
> >>
> >>
> >> Oh dear.
> >>
> >> Are you doing your app logging to a database?
> >>
> >> Is it the same database that your app uses?
> >>
> >> Is it the same connection pool that your app uses?
> >>
> >>
> >> p
> >>
> >>
> >>>> Date: Tue, 12 Feb 2013 15:35:40 -0200
> >>>> From: edsonrich...@hotmail.com
> >>>> To: users@tomcat.apache.org
> >>>> Subject: Re: Tomcat hanging unexpectedly [URGENT]
> >>>>
> >>>> There is a similar thread published a week ago.
> >>>> It can be caused by almost anything, and my last suspect would be Tomcat
> >>>> it self.
> >>>> Most of time, the cause is some programming error, like:
> >>>> - missing step out of recursive loop
> >>>> - loading too many objects is memory (for example, when using JPA where
> >>>> graph of objects are all connected - so, when you load one object, all
> >>>> database is read into memory)
> >>>> - some deadlock in multi-threaded application...
> >>>>
> >>>> How to discover:
> >>>>
> >>>> 1) Try to get a memory dump and check how your memory is being used
> >>>> 2) Get a heap dump (stack trace, as well) or currently running
> >>>> application when it is hang, and check for deadlocks
> >>>> 3) Use VisualVM to get a big picture of what the virtual machine is doing
> >>>> 4) Put the application running under profiler (like JRockit Mission
> >>>> Control, or NetBeans profiler)
> >>>>
> >>>> These are some ideas...
> >>>>
> >>>> Regards,
> >>>>
> >>>> Edson
> >>>>
> >>>>
> >>>> Em 12/02/2013 15:27, Cool Techi escreveu:
> >>>>> Hi,
> >>>>>
> >>>>> We are using tomcat 6.0.26 on windows 2008 web server, with Jdk 1.6.32
> >>>>> installed on the server.
> >>>>>
> >>>>> The
> >>>>> server seems to be running smoothly most of the time, but suddenly the
> >>>>> memory used goes very high and tomcat stops responding, the logs don't
> >>>>> show any out of memory or thread exceptions.
> >>>>>
> >>>>> What could be causing this?
> >>>>>
> >>>>> Regards,
> >>>>> Ayush
> >>>>
> >>>>
> >>>> ---------------------------------------------------------------------
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> >>>> For additional commands, e-mail: users-h...@tomcat.apache.org
> >>>>
> >>>
> >>>
> >>>
> >>
> >>
> >> --
> >>
> >> [key:62590808]
> >>
> >> ---------------------------------------------------------------------
> >> To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org
> >> For additional commands, e-mail: users-h...@tomcat.apache.org
> >>
> >
> >
>
>
> --
>
> [key:62590808]
>
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