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 >> >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org >> 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
