-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Pid,
On 2/12/13 1:38 PM, Pid wrote: > 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 .. Tomcat does not use Quartz for anything, so this is looking like a problem elsewhere. We still might be able to help. >> 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 Yuck, >> I don't know what to make of that line, but this looks suspicious: org.apache.tomcat.dbcp.pool.impl.GenericObjectPool.borrorObject() and so does this one: ogr.apache.tomcat.dbcp.pool.impl.GenericObjectPool.getNumIdle Did you manually type-in all of those? >> Does any of these sound like reason. It would be great to get >> pointed in the right direction. > > 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? Yup, that sounds like a recipe for deadlock if it is indeed happening. Ayush, can you try reducing your connection pool's maxActive to 1 in a dev/test environment and try running your application? If it deadlocks (which it will if you try to log to the db while holding a db connection in the same thread), then you have a lot of work to do. - -chris -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.17 (Darwin) Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iEYEAREIAAYFAlEay5wACgkQ9CaO5/Lv0PAxiACaA08FSybmZXG9dk+pQXZHXziq 5IsAn1jtL3XpnVArB5vXn6AmkcwB2tKc =0/94 -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
