Answer Posted / lakshmi
Trouble shooting starts with identifying the root cause.
Steps to follow:
1. check the logs
usually trouble shooting starts with checking the logs.
2. enable debug
(JAVA_OPTIONS=-verbose)
through this we can identify which part of the code is causing the problem.
3. take a thread dump
kill -3 PID
4. take a heap dump
jmap -heap:format=b PID
5. enable GC logs and analyze
use GC viewer
these all are offline trouble shooting techniques. there is an imp technique, i.e.,
6. jconsole
it connects to live jvm and makes an analysis through profiling. it is a debugger and it makes a live analysis.
if still problem raises,
7. service request
here, oracle provides an oracle diagnostic agent called ODA. if still not solved, oracle tells you either to wait or upgrade.
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