Yes, this is exactly the DistributedShell example in the 2.0.3 source
(except for the added specification of containerNode).
So, it's doing the following:
ContainerRequest containerAsk = setupContainerAskForRM(askCount);
resourceManager.addContainerRequest(containerAsk);
// Send the request to RM
LOG.info("Asking RM for containers" + ", askCount=" + askCount);
AMResponse amResp = sendContainerAskToRM();
FYI - the sendContainerAskToRM calls the allocate(progress).
I don't see any NPEs in the resourcemanager's logs.
Regards,
Brian
On 04/11/2013 02:50 PM, Harsh J wrote:
Hi Brian,
Your way of creation seems fine. Are you "adding" this to the
AMRMClient somewhere though, via [1], right before you call
allocate(progress)? Cause otherwise this object's not used at all.
P.s. I'm not sure we'll handle that null for racks all that well in
certain places yet; I've noticed errors in my app when I've missed
passing elements or passed them as nulls, but I didn't rebase it onto
2.0.3 yet so haven't reported anything so far - will do so soon. I'd
check the RM log to see if there's any WARN logged there with an NPE.
[1] -
http://hadoop.apache.org/docs/current/api/org/apache/hadoop/yarn/client/AMRMClient.html#addContainerRequest(org.apache.hadoop.yarn.client.AMRMClient.ContainerRequest)
On Thu, Apr 11, 2013 at 11:30 PM, Brian C. Huffman
<bhuff...@etinternational.com> wrote:
All,
I'm starting to work with YARN and I'm trying to make some changes to the
distributedshell example.
Specifically I'm trying to set the host where the distributed shell
container will run. I added the following code into ApplicationMaster.java:
final String[] containerNodes = { "node1" };
LOG.info("Trying to request node: " + containerNodes[0]);
ContainerRequest request = new ContainerRequest(capability,
containerNodes, null,
pri, numContainers);
And while the log output shows this code is being executed ("Trying to
request..."), it doesn't seem to use it. Is this functionality that isn't
complete yet in the 2.0.3 yarn alpha? Or am I doing something wrong?
Thanks,
Brian
