Threads hang on getCallerClass (Native method)

Question

I encountered stucked threads in tomcat logs. We use java version 7.

The last 2 lines of stacktrace:

Aug 30, 2023 8:09:59 PM org.apache.catalina.valves.StuckThreadDetectionValve$MonitoredThread     interruptIfStuck
ARNING: Thread "ajp-apr-8280-exec-33" (id=990) has been interrupted because it was active for     129,456,677 milliseconds ...
    java.lang.Throwable
         at sun.reflect.Reflection.getCallerClass(Native Method)
         at java.lang.Class.getMethods(Class.java:1479)
          ...

Why did the threads stuck?

Restarting tomcat helped.