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From Kyle Orlando <kyle.r.orla...@gmail.com>
Subject Re: Shortest paths example in giraf 1.1.0.
Date Tue, 30 Jul 2013 15:33:06 GMT
Hmmm, could you post the contents of your mapred-site.xml in
$HADOOP_HOME/conf?  You may need to increase the number of map tasks.

On Tue, Jul 30, 2013 at 11:02 AM, Alex Waagen <awaagen@gmail.com> wrote:
> I am having some trouble getting these examples running. I’m using giraph
> version 1.1.0 and hadoop 0.20.2. I am using the following json file as
> input:
>
> [0,0,[[1,1],[3,3]]]
> [1,0,[[0,1],[2,2],[3,1]]]
> [2,0,[[1,2],[4,4]]]
> [3,0,[[0,3],[1,1],[4,4]]]
> [4,0,[[3,4],[2,4]]]
>
> The command I use is:
>
> hadoop jar
> /path-to-giraph/giraph-core/target/giraph-1.1.0-SNAPSHOT-for-hadoop-0.20.203.0-jar-with-dependencies.jar
> org.apache.giraph.GiraphRunner
> org.apache.giraph.examples.SimpleShortestPathsComputation -vif
> org.apache.giraph.io.formats.JsonLongDoubleFloatDoubleVertexInputFormat -vip
> /path-to-input/input_file.json -of
> org.apache.giraph.io.formats.IdWithValueTextOutputFormat -op
> /path-to-output/outShortest -w 1
>
>
> I see the following output.
>
> 13/07/29 14:36:06 INFO utils.ConfigurationUtils: No edge input format
> specified. Ensure your InputFormat does not require one.
> 13/07/29 14:36:06 INFO job.GiraphJob: run: Since checkpointing is disabled
> (default), do not allow any task retries (setting mapred.map.max.attempts =
> 0, old value = 4)
> 13/07/29 14:36:20 INFO mapred.JobClient: Running job: job_201307232135_0588
> 13/07/29 14:36:21 INFO mapred.JobClient: map 0% reduce 0%
> 13/07/29 14:36:52 INFO mapred.JobClient: map 50% reduce 0%
> 13/07/29 14:47:24 INFO mapred.JobClient: map 0% reduce 0%
> 13/07/29 14:47:39 INFO mapred.JobClient: Job complete: job_201307232135_0588
> 13/07/29 14:47:39 INFO mapred.JobClient: Counters: 6
> 13/07/29 14:47:39 INFO mapred.JobClient: Job Counters
> 13/07/29 14:47:39 INFO mapred.JobClient: SLOTS_MILLIS_MAPS=670508
> 13/07/29 14:47:39 INFO mapred.JobClient: Total time spent by all reduces
> waiting after reserving slots (ms)=0
> 13/07/29 14:47:39 INFO mapred.JobClient: Total time spent by all maps
> waiting after reserving slots (ms)=0
> 13/07/29 14:47:39 INFO mapred.JobClient: Launched map tasks=2
> 13/07/29 14:47:39 INFO mapred.JobClient: SLOTS_MILLIS_REDUCES=0
> 13/07/29 14:47:39 INFO mapred.JobClient: Failed map tasks=1
>
>
> When I check the job tracker, I see that two map jobs were killed, with the
> following errors:
>
> java.lang.Throwable: Child Error
> at org.apache.hadoop.mapred.TaskRunner.run(TaskRunner.java:242)
> Caused by: java.io.IOException: Task process exit with nonzero status of 1.
> at org.apache.hadoop.mapred.TaskRunner.run(TaskRunner.java:229)
>
> java.lang.IllegalStateException: run: Caught an unrecoverable exception
> exists: Failed to check
> /_hadoopBsp/job_201307232135_0588/_applicationAttemptsDir/0/_superstepDir/-1/_addressesAndPartitions
> after 3 tries!
> at org.apache.giraph.graph.GraphMapper.run(GraphMapper.java:101)
> at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:647)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:323)
> at org.apache.hadoop.mapred.Child$4.run(Child.java:270)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:396)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1157)
> at org.apache.hadoop.mapred.Child.main(Child.java:264)
> Caused by: java.lang.IllegalStateException: exists: Failed to check
> /_hadoopBsp/job_201307232135_0588/_applicationAttemptsDir/0/_superstepDir/-1/_addressesAndPartitions
> after 3 tries!
> at org.apache.giraph.zk.ZooKeeperExt.exists(ZooKeeperExt.java:369)
> at org.apache.giraph.worker.BspServiceWorker.s
> Task attempt_201307232135_0588_m_000001_0 failed to report status for 600
> seconds. Killing!
>
> Any idea what the problem is?
> Thanks in advance.



-- 
Kyle Orlando
Computer Engineering Major
University of Maryland

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