On 12/04/2016 19:30, Josep M Beleta wrote: > Hi, > > I need some help with a problem we have running Tomcat 8, with Java 8 on > a Windows 2008 R2 Standard with Service Pack 1 running as a virtual > machine on top of ESXi, 5.1.0. The virtual machine has 16 GB of memory > and 4 CPUs. The physical host computer has lots of memory and is not > stressed at all. > > One week ago our Tomcats, we have two, began to use high CPU. When the > problem started we had no made any change we can remember in the > preceding week, and no Windows update was installed. > > We use two Tomcats, one of them with some in-house applications the > other one with Jira. Both began to shows the same symptoms roughly at > the same time. > > The Jira Tomcat version is 8.0.17 and runs with Java 1.8.0_51 64 Bit, > the other Tomcat is 8.0.33 and runs over Java 1.8.0_77 64 Bit. > > These are the facts we can summarize: > > 1. Now we run only the Tomcat for our in-house applications.We stopped > the Jira one. > 2. We run it as a service. > 3. Every time, two hours after launching the Tomcat service, the CPU > use jumps to 70-75% and some time after (one hour more) it reaches > 100 %. More threads are allocated using lots of CPU. The final > result is our entire system being degraded as time goes on. > 4. The problems has nothing to do with our applications. We undeployed > them with the same result. > 5. We tested versions 8.0.23 and 8.0.33 in our internal Tomcat with the > same results. > 6. We tested JVM 1.8.0_66, 1.8.0_71 and 1.8.0_77 with the same results. > 7. We have changed some JVM parameters, allocating more heap memory, or > changing GC methods with always the same result, 100% CPU. > 8. Using jstack we take several thread dumps that we are enclosing in > this message. Dump75 is whe the CPU was at 75 %, the other one, > Dump100, the CPU was at 100%. > 9. I am attaching the Process Explorer images of the Tomcat process > showing also the Tomcat threads. I am including a Tomcat manager > screenshot showing the status of the server. > > Any help would be deeply appreciated,
We really need to see those thread dumps. I've checked the list config and plain text files should be allowed through. I'm attaching a test file to this message to confirm that. If it comes through, please provide your thread dumps in plain text form and we can take a look. Mark
This is a test
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