2 Replies Latest reply on Nov 27, 2015 4:29 AM by ziggyfish

Memory Leak I can't seem to find.

ziggyfish Nov 27, 2015 1:32 AM

Hi,

I am trying to find a memory leak in my JSF JBoss application (the problem occurs on the latest versions of both EAP, and wildfly). If I run this command from the command line (in production, the application runs out of memory after about 2 days):

ab -n $((16#10000)) -c 10 'http://localhost:8080/progname/index.jsf'

Which just requests http://localhost:8080/progname/index.jsf 1048576 times with 10 concurrent connections.

EAP (or Wildfly 9) eventually fails with a OOM Exception (in Hibernate, JDBC). I tried using VisiualVM, however it doesn't give me any useful information. Most of the memory is used by byte[] objects or ConcurrentHashMap, inspecting a heap dump doesn't give me any more clues either.

Next I tried removing everything inside index.xhtml, leaving just <html></html>, and still the same problem.

I am at a lost at the moment as to where to goto next. Any suggestions?

Thanks

Brendan

1. Re: Memory Leak I can't seem to find.

pjhavariotis Nov 27, 2015 1:50 AM (in response to ziggyfish)

I am afraid you have to analyze some heap dumps in order to find the root cause.
I do not know which tool you prefer but the Eclipse Memory Analyzer tool will do the job for you.
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2. Re: Memory Leak I can't seem to find.

ziggyfish Nov 27, 2015 4:29 AM (in response to pjhavariotis)

It seems that Undertow stores session data in memory (in the class io.undertow.server.session.InMemorySessionManager).

So the next question is. Is there a way to get undertow to store its Session data in files?

Thanks

Brendan
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