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From Ammar Sahib <ammar.sa...@yahoo.com>
Subject Re: The number of splits has exceeded the number of max tasks
Date Sun, 09 Mar 2014 11:24:31 GMT
I was sure to restart HAMA. According to the web UI, I have the following in my cluster:


master:40000 Hama BSP AdministrationState: RUNNING
Started: Sun Mar 09 12:17:01 CET 2014
Version: 0.6.4
Compiled By: edward
Compiled At Time: Mon Mar  3 19:14:32 KST 2014
Identifier: 201403091217
________________________________
 
Groom Servers
BSP Task Capacity
Avg. Tasks/Node
Blacklisted Nodes
4 120 30.00 0 
________________________________
 
Running Jobs
No jobs found! 
________________________________
 
All Jobs History
No jobs found! 
________________________________
 Hama, 2014. 


But When running my job I will something different:

14/03/09 12:19:21 INFO bsp.FileInputFormat: Total input paths to process : 1
14/03/09 12:19:22 INFO util.NativeCodeLoader: Loaded the native-hadoop library
14/03/09 12:19:22 WARN snappy.LoadSnappy: Snappy native library not loaded
14/03/09 12:19:22 INFO bsp.FileInputFormat: Total input paths to process : 1
Exception in thread "main" java.io.IOException: Job failed! The number of splits has exceeded
the number of max tasks. The number of splits: 52, The number of max tasks: 20
        at org.apache.hama.bsp.BSPJobClient.submitJobInternal(BSPJobClient.java:349)
        at org.apache.hama.bsp.BSPJobClient.submitJob(BSPJobClient.java:296)
        at org.apache.hama.bsp.BSPJob.submit(BSPJob.java:219)
        at org.apache.hama.bsp.BSPJob.waitForCompletion(BSPJob.java:226)
        at org.apache.hama.bsp.BSPJobClient.partition(BSPJobClient.java:460)
        at org.apache.hama.bsp.BSPJobClient.submitJobInternal(BSPJobClient.java:341)
        at org.apache.hama.bsp.BSPJobClient.submitJob(BSPJobClient.java:296)
        at org.apache.hama.bsp.BSPJob.submit(BSPJob.java:219)
        at org.apache.hama.graph.GraphJob.submit(GraphJob.java:208)
        at org.apache.hama.bsp.BSPJob.waitForCompletion(BSPJob.java:226)
        at de.rwthaachen.dbis.i5cloudmatch.controller.Matcher.main(Matcher.java:479)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.hadoop.util.RunJar.main(RunJar.java:156)





On Sunday, March 9, 2014 12:23 AM, Edward J. Yoon <edwardyoon@apache.org> wrote:
 
Please use the web UI to check the cluster capacity.

I think your cluster is not working correctly now, or you didn't
restart your cluster.

On Sun, Mar 9, 2014 at 2:00 AM, Ammar Sahib <ammar.sahib@yahoo.com> wrote:
> Hi
>
> I tried to increase the bsp.tasks.maximum in hama-default.xml from 3 to 30
> but I still get the same error.
> I am thinking of of reducing the number of blocks of the input file by
> controlling the parameter dfs.namenode.fs-limits.min-block-size in
> hdfs-default.xml. Do you think this might be a good approach that might
> solve the problem?
>
>
>
> On Friday, March 7, 2014 11:32 PM, Edward J. Yoon <edwardyoon@apache.org>
> wrote:
> If the number of blocks of input file is 52 (see [1]), you should
> increase number of task slots by adding new machine or increasing max
> tasks number per node "bsp.tasks.maximum".
>
> 1.
> http://stackoverflow.com/questions/11168427/viewing-the-number-of-blocks-for-a-file-in-hadoop
>
> On Sat, Mar 8, 2014 at 12:22 AM, Ammar Sahib <ammar.sahib@yahoo.com> wrote:
>> Hi
>>
>>
>> I am using HAMA 0.6.4 and I am running my custom program using a cluster
>> of 4 machines. My input is a single file and I am setting the number of
>> BSP tasks to the number of Groom servers by using
>> (JOB.setNumBspTask(cluster.getGroomServers()). I am using the
>> HashPartitioner.class to partition the data.
>>
>>
>> I have a problem when I load my data. When I run my custom program I get
>> the following error messages:
>>
>> 14/03/07 16:02:34 INFO bsp.FileInputFormat: Total input paths to process :
>> 1
>> 14/03/07 16:02:34 INFO util.NativeCodeLoader: Loaded the
>>  native-hadoop library
>> 14/03/07 16:02:34 WARN snappy.LoadSnappy: Snappy native library not loaded
>> 14/03/07 16:02:34 INFO bsp.FileInputFormat: Total input paths to process :
>> 1
>> Exception
>>  in thread "main" java.io.IOException: Job failed! The number of splits
>> has exceeded the number of max tasks. The number of splits: 52, The
>> number of max tasks: 20
>>        at
>> org.apache.hama.bsp.BSPJobClient.submitJobInternal(BSPJobClient.java:349)
>>        at
>> org.apache.hama.bsp.BSPJobClient.submitJob(BSPJobClient.java:296)
>>        at org.apache.hama.bsp.BSPJob.submit(BSPJob.java:219)
>>        at org.apache.hama.bsp.BSPJob.waitForCompletion(BSPJob.java:226)
>>        at
>> org.apache.hama.bsp.BSPJobClient.partition(BSPJobClient.java:460)
>>
>>  at
>> org.apache.hama.bsp.BSPJobClient.submitJobInternal(BSPJobClient.java:341)
>>        at
>> org.apache.hama.bsp.BSPJobClient.submitJob(BSPJobClient.java:296)
>>        at org.apache.hama.bsp.BSPJob.submit(BSPJob.java:219)
>>        at org.apache.hama.graph.GraphJob.submit(GraphJob.java:208)
>>        at org.apache.hama.bsp.BSPJob.waitForCompletion(BSPJob.java:226)
>>        at
>> de.rwthaachen.dbis.i5cloudmatch.controller.Matcher.main(Matcher.java:479)
>>        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>        at
>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
>>        at
>>
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>>        at java.lang.reflect.Method.invoke(Method.java:606)
>>        at org.apache.hadoop.util.RunJar.main(RunJar.java:156)
>>
>> Any advice of how to solve this problem?
>>
>> RegardsAmmar
>
>
>
> --
> Edward J. Yoon (@eddieyoon)
> Chief Executive Officer
> DataSayer, Inc.
>
>



-- 
Edward J. Yoon (@eddieyoon)
Chief Executive Officer
DataSayer, Inc.
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