Sean,
> -----Original Message----- > From: Sean Neeley <sean.nee...@producepro.com> > Sent: Wednesday, July 01, 2020 12:26 PM > To: Tomcat Users List <users@tomcat.apache.org> > Subject: Re: Having trouble with tomcat 7 installation on RHEL 7.8 power pc > > John, The top two processes are: > > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND > 19360 tomcat 20 0 3302144 42560 18944 R 99.9 0.5 46:02.37 java > 19363 tomcat 20 0 3302144 42560 18944 R 98.4 0.5 45:48.50 VM Thread > > I tried kill -3 on both of them, plus the java process ID I see from a "ps" > command, several seconds apart. The only logs created are these, and they > are still all empty after the kill -3: > -rw-r--r-- 1 tomcat tomcat 0 Jul 1 10:22 catalina.2020-07-01.log > -rw-r--r-- 1 tomcat tomcat 0 Jul 1 10:22 host-manager.2020-07-01.log > -rw-r--r-- 1 tomcat tomcat 0 Jul 1 10:22 localhost.2020-07-01.log > -rw-r--r-- 1 tomcat tomcat 0 Jul 1 10:22 manager.2020-07-01.log > > Any other ideas? > > On Wed, Jul 1, 2020 at 12:09 PM <john.e.gr...@wellsfargo.com.invalid> > wrote: > > > Sean, > > > > > -----Original Message----- > > > From: Sean Neeley <sean.nee...@producepro.com> > > > Sent: Wednesday, July 01, 2020 11:15 AM > > > To: users@tomcat.apache.org > > > Subject: Having trouble with tomcat 7 installation on RHEL 7.8 power > > > pc > > > > > > I just installed tomcat 7 on a Red Hat Enterprise Linux Server 7.8, > > power pc > > > system. As soon as the service starts, the java process uses 100% cpu. > > > Logs get created in /var/log/tomcat, but they all have size 0 bytes. > > > I > > have not > > > modified the standard configuration (tomcat.conf, server.xml, etc). > > > The tomcat packages that are installed are: > > > > > > tomcat-7.0.76-12.el7_8.noarch > > > tomcat-jsp-2.2-api-7.0.76-12.el7_8.noarch > > > tomcat-el-2.2-api-7.0.76-12.el7_8.noarch > > > tomcat-lib-7.0.76-12.el7_8.noarch > > > tomcat-servlet-3.0-api-7.0.76-12.el7_8.noarch > > > > > > Are there any tricks I can use to troubleshoot what is going wrong? > > > Without any logs being created, it seems impossible to determine the > > > problem. Thanks for helping. > > > > > > Sean > > > > Use kill -3 to take several thread dumps about 5-10 seconds apart. > > They will probably end up in catalina.out. > > > > You can also use top -H to see what individual threads are using CPU. > > > > Sorry, I don't know much more. It's interesting that the CPU is being consumed by "VM Thread." It doesn't look like an ordinary Tomcat or application problem. When I googled "java vm thread," I got some interesting results, such as this one: https://docs.oracle.com/javase/7/docs/webnotes/tsg/TSG-VM/html/hangloop.html That also describes the scenario where a thread dump doesn't seem to do anything.
