db-derby-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From mogoye <sylvain.rou...@eloquant.com>
Subject Re: Strange OutOfMemory in unittest
Date Thu, 28 Jun 2012 07:13:14 GMT

Thx a lot for your answer.

> I can only speculate on the 'why' but perhaps more importantly is how
> big a heap are you currently allocating and have you tried bumping that 
> up? 
I've connected JConsole to my process I it seems that the process never
allocate more than 80Mb (so very few memory). I'm currently trying to
reproduce the OutOfMemory, with JVM launched with
-XX:+HeapDumpOnOutOfMemoryError parameter. But Since I added this param I
could not reproduce the problem.

> As to 'why', well perhaps it is just a timing thing where the code needs 
> to allocate more objects but the gc hasn't run yet to free more space. 
My last tests are consistent with the hypothesis of a timming problem.
But has my process does not use more than 80Mb I don't think this a a pbm
with GC as JVM could still allocate memory.

> One other question:  Are you running your tests from Eclipse in the same 
> jvm?  If you run them from a shell would you get the same failure rate? 
Yes my test was running using eclispe "run as Junit Test". 
Actually I could not reproduce pbm running the test in command line (mvn
clean install).


View this message in context: http://old.nabble.com/Strange-OutOfMemory-in-unittest-tp34080334p34084681.html
Sent from the Apache Derby Users mailing list archive at Nabble.com.

View raw message