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From Eric Newton <>
Subject Re: Standby GC OutOfMemoryError
Date Wed, 04 Dec 2013 21:41:18 GMT
I fired up a standby GC after I reduced the wait time between zookeeper
lock checks to 10ms, and changed the memory from 256M to 56M.  It's been
running for the last hour.  I didn't expect it to fail, but I wanted to
make sure it wasn't reproducible.

It's possible that you are running up against an nproc limit.   We've seen
out of memory issues when the JVM can't create a new thread.

(I ran the test with 1.4.5-SNAPSHOT)


On Wed, Dec 4, 2013 at 2:31 PM, Eric Newton <> wrote:

> I don't know if anyone is running a standby GC.  Can you go ahead and open
> a ticket?
> -Eric
> On Wed, Dec 4, 2013 at 2:29 PM, Terry P. <> wrote:
>> Greetings folks,
>> With Accumulo 1.4.2 I'm running Standby Master and GC processes on my
>> Secondary Namenode. I've found that my Standby GC gets terminated due to
>> OutOfMemoryError errors after about 6 days of running, even though it is
>> running in standby mode only. The Standby Master is still running fine
>> after 3 weeks of standby mode.
>> My script is using the 3GB environment default GC memory
>> options of -Xmx256m -Xms256m, same as on the Master where the primary GC
>> runs and has never gotten an OOME. At this point I don't see any reason to
>> try increasing that as my bet is it will only delay the OOME.
>> Anyone else running standby GC and running into this (or working fine)?

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