You're probably hitting MAPREDUCE-3537. Try using the hadoop-0.23.1-SNAPSHOT or
build it yourself from branch-0.23 on ASF svn.
Arun
On Jan 5, 2012, at 10:45 PM, raghavendhra rahul wrote:
> Yes i am writing my own application master.Is there a way to specify
> node1: 10 conatiners
> node2: 10 containers
> Can we specify this kind of list using the application master????
>
> Also i set request.setHostName("client"); where client is the hostname of a
> node
> I checked the log to find the following error
> java.io.FileNotFoundException: File /local1/yarn/.yarn/local/
> usercache/rahul_2011/appcache/application_1325760852770_0001 does not exist
> at
> org.apache.hadoop.fs.RawLocalFileSystem.getFileStatus(RawLocalFileSystem.java:431)
> at org.apache.hadoop.fs.FileSystem.primitiveMkdir(FileSystem.java:815)
> at
> org.apache.hadoop.fs.DelegateToFileSystem.mkdir(DelegateToFileSystem.java:143)
> at org.apache.hadoop.fs.FilterFs.mkdir(FilterFs.java:189)
> at org.apache.hadoop.fs.FileContext$4.next(FileContext.java:700)
> at org.apache.hadoop.fs.FileContext$4.next(FileContext.java:697)
> at
> org.apache.hadoop.fs.FileContext$FSLinkResolver.resolve(FileContext.java:2325)
> at org.apache.hadoop.fs.FileContext.mkdir(FileContext.java:697)
> at
> org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor.launchContainer(DefaultContainerExecutor.java:122)
> at
> org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call(ContainerLaunch.java:237)
> at
> org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call(ContainerLaunch.java:67)
> at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
> at java.util.concurrent.FutureTask.run(FutureTask.java:166)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
> at java.lang.Thread.run(Thread.java:636)
>
> Any ideas.....
>
>
> On Fri, Jan 6, 2012 at 12:41 AM, Arun C Murthy <a...@hortonworks.com> wrote:
> Are you writing your own application i.e. custom ApplicationMaster?
>
> You need to pass ResourceRequest (RR) with a valid hostname alongwith
> (optionally) RR with rack and also a mandatory RR with * as the resource-name.
>
> Arun
>
> On Jan 4, 2012, at 8:04 PM, raghavendhra rahul wrote:
>
>> Hi,
>>
>> I tried to set the client node for launching the container within the
>> application master.
>> I have set the parameter as
>> request.setHostName("client");
>> but the containers are not launched in the destined host.Instead the loop
>> goes on continuously.
>> 2012-01-04 15:11:48,535 INFO appmaster.ApplicationMaster
>> (ApplicationMaster.java:run(204)) - Current application state: loop=95,
>> appDone=false, total=2, requested=2, completed=0, failed=0,
>> currentAllocated=0
>>
>> On Wed, Jan 4, 2012 at 11:24 PM, Robert Evans <ev...@yahoo-inc.com> wrote:
>> Ann,
>>
>> A container more or less corresponds to a task in MRV1. There is one
>> exception to this, as the ApplicationMaster also runs in a container. The
>> ApplicationMaster will request new containers for each mapper or reducer
>> task that it wants to launch. There is separate code from the container
>> that will serve up the intermediate mapper output and is run as part of the
>> NodeManager (Similar to the TaskTracker from before). When the
>> ApplicationMaster requests a container it also includes with it a hint as to
>> where it would like the container placed. In fact it actually makes three
>> request one for the exact node, one for the rack the node is on, and one
>> that is generic and could be anywhere. The scheduler will try to honor
>> those requests in the same order so data locality is still considered and
>> generally honored. Yes there is the possibility of back and forth to get a
>> container, but the ApplicationMaster generally will try to use all of the
>> containers that it is given, even if they are not optimal.
>>
>> --Bobby Evans
>>
>>
>> On 1/4/12 10:23 AM, "Ann Pal" <ann_r_...@yahoo.com> wrote:
>>
>> Hi,
>> I am trying to understand more about Hadoop Next Gen Map Reduce and had the
>> following questions based on the following post:
>>
>> http://developer.yahoo.com/blogs/hadoop/posts/2011/03/mapreduce-nextgen-scheduler/
>>
>> [1] How does application decide how many containers it needs? The containers
>> are used to store the intermediate result at the map nodes?
>>
>> [2] During resource allocation, if the resource manager has no mapping
>> between map tasks to resources allocated, how can it properly allocate the
>> right resources. It might end up allocating resources on a node, which does
>> not have data for the map task, and hence is not optimal. In this case the
>> Application Master will have to reject it and request again . There could be
>> considerable back- and- forth between application master and resource
>> manager before it could converge. Is this right?
>>
>> Thanks!
>>
>>
>
>
