Eric, > -----Original Message----- > From: Eric Robinson <eric.robin...@psmnv.com> > Sent: Thursday, August 08, 2019 11:53 AM > To: users@tomcat.apache.org > Subject: Tomcat Server Using 100% CPU > > We have a farm of VMs, each running multiple instances of tomcat (up to 80 > instances per server). Everything has been running fine for years, but > recently one server has started nailing the CPU to 100% utilization. > > We have tried: > > > * Different versions of tomcat and JDK > * Doubling the resources to 16 cores and 56 GB RAM > * Moving the VM to different physical server > * Rebuilding the tomcat instances on a brand new VM using Windows > Server 2019 > * Rebuilding the tomcat instances on a brand new VM using Red Hat > Enterprise Linux 7.5 > > Nothing has worked. No matter where we run the tomcats, they drive CPU > up to 100%. Meanwhile the other six servers are still running fine. They all > run the same canned tomcat applications. > > We would appreciate some guidance on getting to the bottom of this > problem. > > --Eric > >
Are you sure that it's the Tomcat process that is using the CPU? If so, take several thread dumps about 5 seconds apart. On Linux, use kill -3 tomcatpidhere. They will go to catalina.out. You'll probably need a developer to interpret them. --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
