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From Mike Hugo <>
Subject Re: Cleanup of distcache after running map reduce jobs
Date Thu, 07 Mar 2013 20:18:22 GMT
Thanks John!

I ended up playing with some settings in mapred-site.xml,
namely mapreduce.tasktracker.local.cache.numberdirectories
and local.cache.size and that seems to have resolved our issue for the


On Thu, Mar 7, 2013 at 12:26 PM, John Vines <> wrote:

> The cache will clear itself after 24 hours if I remember correctly. I have
> hit this issue before and, provided your hitting the same issue I've seen
> before, you're options are to either-
> 1. up the number of inodes for your system
> 2. add accumulo to the child opts classpath via mapred-site.xml and then
> use the normal hadoop command to kick off your job instead of the
> accumulo/ script
> On Thu, Mar 7, 2013 at 12:37 PM, Mike Hugo <> wrote:
>> We noticed that after running several thousand map reduce jobs that our
>> file system was filling up.  The culprit is the libjars that are getting
>> uploaded to the distributed cache for each job - doesn't look like they're
>> ever being deleted.
>> Is there a mechanism to clear the distributed cache (or should this
>> happen automatically).
>> This is probably a straight up hadoop question, but I'm asking here first
>> in case you've seen this sort of thing with accumulo before.
>> Thanks!
>> Mike

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