Oh, I see. You can change the timeout of how long the giraph job waits
for tasks before giving up. Try setting
giraph.maxMasterSuperstepWaitMsecs to a higher number. The default is 10
minutes.
Avery
On 5/7/13 2:10 PM, Ramani, Arun wrote:
Hi Avery,
I am not preempting tasks out of the giraph pool. I have configured
pre-emption so that any job submitted to giraph pool will get its min
share. Any suggestion on how to make this work?
Thanks so much in advance.
Arun Ramani
From: Avery Ching <[email protected] <mailto:[email protected]>>
Reply-To: "[email protected] <mailto:[email protected]>"
<[email protected] <mailto:[email protected]>>
Date: Tuesday, May 7, 2013 7:25 AM
To: "[email protected] <mailto:[email protected]>"
<[email protected] <mailto:[email protected]>>
Subject: Re: Giraph and Fair Scheduler
Can you disable the preemption for the giraph pool? It's not great to
preempt those tasks.
Avery
On 5/6/13 6:37 PM, Ramani, Arun wrote:
Hi,
I am running Fair scheduler with many applications in hadoop stack in
my cluster (like pig, hive, hbase etc). I have dedicated a pool for
Giraph and want to run giraph along with those other applications. I
have configured pre-emption and and set the
"minsharepreemptiontimeout=5" (sec – for the jobs submitted to this
pool to wait to get the min share).
I am trying to run giraph in this mode. I see that jobs from other
pools are getting pre-empted to give the giraph job's pool its
configured min share but my job fails with "Unable to create native
thread" error. This same job passes if the slots are available
immediately without having to wait for the tasks from other queues to
be pre-empted. I also tried to tweak the
"giraph.minPercentResponded=50.0f". My Giraph job still fails. Please
help in this scenario.
Basically, I wanted to know how to configure giraph to wait for a
threshold for the slots to be available for it through pre-emption.
Thanks
Arun Ramani
