пт, 5 янв. 2024 г. в 12:45, Vaidya, Omkar <ovai...@ptc.com>: > > Hi Team, > > > > This is regarding like we have one customer issue where on Linux platform, we > have configured our IOT-application (Thingworx), which is using Tomcat as a > server. > > So we are able to identify that even when we remove our application, Tomcat > is creating a zombie (defunct) process, which is creating 200+ processes > under the process table, which ultimately occupy all the OS resources and the > application goes in a hung state. This issue is also reproducible on the > Standalone Tomcat server also. > > There are two scenarios mentioned below - > > 1. If this is relatable to Tomcat can you please suggest any > article or documentation so that we can stop zombie process creation, if this > is a known issue or there is only way to clear zombie (defunct) process from > Processes table of linux.
The count of "200" sounds a lot like the default value of "maxThreads" attribute of a <Connector>. See Configuration Reference, https://tomcat.apache.org/tomcat-9.0-doc/config/http.html So it is very likely that your "zombie processes" are just Threads and not processes. https://docs.oracle.com/javase/8/docs/api/java/lang/Thread.html A good way to see what those threads are actually doing is to take a "Thread dump". It can be done with "jstack" program that comes with Java. See also FAQ pages https://cwiki.apache.org/confluence/display/TOMCAT/Troubleshooting+and+Diagnostics#TroubleshootingandDiagnostics-CommonTroubleshootingScenario https://cwiki.apache.org/confluence/display/TOMCAT/HowTo#HowTo-HowdoIobtainathreaddumpofmyrunningwebapp? Best regards, Konstantin Kolinko --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
