Hello, We had a slightly similar case a couple of months ago. We upgraded a clients app to magnolia from 3.5.4 to 3.5.9, together with some minor lay-out changes in templates. Through a report of the servers cpu we found out that since the upgrade that tomcat instance occupied the system in the range between 80 and 100% cpu. Very strange was (but luckily) that the response time of the webapp (and others that run on the same machine) did not significantly drop.
We are sure it was this tomcat instance running magnolia 3.5.9. We thought long and hard about a possible cause, but could not come up with one. We upgraded to 3.5.9 to be able to move to a 3.6 which would solve some issues our client experienced. We did not go so far as to start monitoring to find out which class was causing the trouble. Our hope and guess was that with a new release the trouble would be over. And it was. We're now on 3.6.6 and the cpu is normal again. Not much help for you to get a solution I'm afraid, but just an extra story. Good luck. Regards, Bert -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Jan Haderka Sent: vrijdag 31 juli 2009 7:36 To: Magnolia User-List Subject: RE: [magnolia-user] CPU 100% On Thu, 2009-07-30 at 10:14 +0200, Carla Di Santis wrote: > It is the author instance, using mysql for the repositories and it is the > only app running in tomcat. The public instances don't have any problems. > I didn't find any error in the tomcat log. The restart doesn't solve the > problem. The problem go away on its own after a long time (about 1 day). > I saw some posts about corruption of indexes, could be something like that? At this point it could be anything. :( It can certainly be related to the indexes as indexing is done in the background. OTOH indexing is triggered by saving modified (or new) content, so it is unlikely to occur without a cause. Also should the indexes be corrupted, you would see errors in the logs and you would also have issues with search (not finding expected nodes). Easy way to verify is to shutdown, delete all "index" folders from all workspaces and restart. The indexing will be performed synchronously on startup. Another possible cause could be communication errors with the DB, but again you would see that in the log files (unless, it just gets slow, but not timeout). I presume you verified that 100% CPU is occupied by the Tomcat and not by anything else? If you have multicore/CPU server, are all the cores/CPUs occupied or only the one? Also, did you had the issue before upgrading to 3.6.6, or does it happen only since? Do you use Data Module and DMS? Any scheduled tasks on your instance (or scheduled data imports in case of using Data module)? > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Jan Haderka > Sent: Thursday, July 30, 2009 7:58 AM > To: Magnolia User-List > Subject: Re: [magnolia-user] CPU 100% > > > Without providing more details on your configuration and symptoms of the > issue it would be very difficult to help you. > Also try to describe a scenario in which it happened list time ... is it > a public or author instance ... do you have other apps running in > tomcat ... is there anything in the logs ... if it becomes slow, does it > go away on its own given enough time or is the restart only way to "fix" > the issue? > > Jan > > On Wed, 2009-07-29 at 18:12 +0200, Carla Di Santis wrote: > > Hi, > > I have a problem with Magnolia 3.6.6. > > Sometimes Magnolia take 100% CPU and it becomes very slow, without > > apparent reason. The problem remains for some hours, also if I stop and > > start tomcat. > > Can you help me? > > Tanks > > Carla > > > > > > ---------------------------------------------------------------- > > For list details see > > http://www.magnolia-cms.com/home/community/mailing-lists.html > > To unsubscribe, E-mail to: <[email protected]> > > ---------------------------------------------------------------- -- Best regards, Jan Haderka Magnolia International Ltd. Meet us at the Magnolia Conference http:/www.magnolia-cms.com/conference Magnolia® - Simple Open Source Content Management ---------------------------------------------------------------- For list details see http://www.magnolia-cms.com/home/community/mailing-lists.html To unsubscribe, E-mail to: <[email protected]> ---------------------------------------------------------------- ---------------------------------------------------------------- For list details see http://www.magnolia-cms.com/home/community/mailing-lists.html To unsubscribe, E-mail to: <[email protected]> ----------------------------------------------------------------
