In Apache Tomcat, there is a Stuck Thread Detector Valve which can be enabled pretty easily through the Tomcat “server.xml” file. I talked about that in a previous blog already and provided an AWK parser to extract important details from the logs. However, Tomcat does not have, as far as I know, any notion of Hogging Threads. That’s what I…
Most Application Servers allow for long and/or stuck threads detection, to let you know that something is currently very slow, waiting on something or just simply stuck. On tomcat, this isn’t enabled by default, and you need to manually configure it as needed. But once done, it will start displaying information into the logs that can be used to find…
A few weeks ago, I faced an issue at a customer where xPlore PrimaryDsearch would stop responding to curl/wget/browser requests from time to time. The impacted environments were containers (pods) hosted on Kubernetes. At this customer, we were in progress of migrating their standalone xPlore installations (also on pods) to Multi-Node, meaning that before, there was only 1 pod containing…
Introduction A complaint I heard from customers about ODA is the low core speed of the Intel Xeon processor embedded in the X8-2 servers: Intel(R) Xeon(R) Gold 5218 CPU @ 2.30GHz. 2.30GHz only? Because of its comfortable number of cores (16 per processor), the cruise speed of each core is limited. Is it a problem compared to a home made…
In Weblogic it is common to have this warning: ThreadPool has stuck threads. Here we will see a way to determine which can be the cause. When monitoring Weblogic you can notice that time to time your servers are going in Warning mode. And when clicking on warnings you see this screen: The reason is presented as “ThreadPool has stuck…
