in the cdm-server many threads are blocked.

Analysis of this situation:

(Used tool: http://fastthread.io)

cdmserver started in eclipse via cdm-server - start cdm-webapp.launch with one instance

stacktrace taken by

jstack <pid>

cdmserver on edit-production after running for ~24 hours

stacktrace can only be taken by using the -F option:

jstack -F <pid>

otherwise jstack can not attach to the process: 30162: Unable to open socket file: target process not responding or HotSpot VM not loaded

IN this stack trace all non native threads are blocked:

An other option to take stackstraces is using jvisualvm which can attach to the process via the jmx port. The stacktrace taken this way is perfectly usable.

Conclusion: jsvc makes it harder to analyse performance problems on the servers since jstack can not be used to get thread dumps on the commandline¶