https://bz.apache.org/bugzilla/show_bug.cgi?id=69608
Bug ID: 69608
Summary: JSP Servlet engine is garbage collected leading to
Denial of service
Product: Tomcat 10
Version: unspecified
Hardware: All
OS: All
Status: NEW
Severity: critical
Priority: P2
Component: Servlet
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ------
Tomcat's JSP servlet engine is garbage collected typically within 12-36 hours
if large amounts of RAM is allocated using Xms and Xmx flags, in my case I was
using 2GB min and 6GB max.
It leads to pages loading forever or no response from server or Denial of
Service while the java classes in the web applications runs just fine.
It's resolved using ZGC, now I'm using -
export CATALINA_OPTS="-Xms10g -Xmx10g -XX:+UseZGC -XX:+ZGenerational"
It's a very old problem and generally found in tomcat 6,7,8,9,10,11.
Saw this old post -
https://serverfault.com/questions/281515/periodic-unresponsiveness-in-tomcat
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