Hi All,

I have been trying (quite unsuccessfully for a while now) to run the PageRankBenchmark to play around with Giraph. I got hadoop running in a single node setup and hadoop jobs and jars run just fine. When I try to run the PageRankBenchmark, I get this
incomprehensible error which I'm not able to diagnose.



-----------------------------------CUT HERE--------------------------------------------- abhi@darkstar:trunk $ hadoop jar target/giraph-0.70-jar-with-dependencies.jar org.apache.giraph.benchmark.PageRankBenchmark -e 1 -s 3 -v -V 50000000 -w 30
Warning: $HADOOP_HOME is deprecated.

Using org.apache.giraph.benchmark.PageRankBenchmark$PageRankVertex
12/03/04 03:44:08 WARN bsp.BspOutputFormat: checkOutputSpecs: ImmutableOutputCommiter will not check anything
12/03/04 03:44:09 INFO mapred.JobClient: Running job: job_201203031851_0004
12/03/04 03:44:10 INFO mapred.JobClient:  map 0% reduce 0%
12/03/04 03:44:26 INFO mapred.JobClient:  map 3% reduce 0%
12/03/04 10:43:52 INFO mapred.JobClient:  map 0% reduce 0%
12/03/04 10:43:57 INFO mapred.JobClient: Task Id : attempt_201203031851_0004_m_000000_0, Status : FAILED Task attempt_201203031851_0004_m_000000_0 failed to report status for 24979 seconds. Killing! 12/03/04 10:44:00 INFO mapred.JobClient: Task Id : attempt_201203031851_0004_m_000001_0, Status : FAILED Task attempt_201203031851_0004_m_000001_0 failed to report status for 25159 seconds. Killing!
12/03/04 10:44:07 INFO mapred.JobClient:  map 3% reduce 0%
12/03/04 10:49:07 INFO mapred.JobClient:  map 0% reduce 0%
12/03/04 10:49:12 INFO mapred.JobClient: Task Id : attempt_201203031851_0004_m_000000_1, Status : FAILED
java.lang.Throwable: Child Error
    at org.apache.hadoop.mapred.TaskRunner.run(TaskRunner.java:271)
Caused by: java.io.IOException: Task process exit with nonzero status of 1.
    at org.apache.hadoop.mapred.TaskRunner.run(TaskRunner.java:258)

12/03/04 10:49:22 INFO mapred.JobClient:  map 3% reduce 0%
12/03/04 10:54:23 INFO mapred.JobClient:  map 0% reduce 0%
12/03/04 10:54:28 INFO mapred.JobClient: Task Id : attempt_201203031851_0004_m_000000_2, Status : FAILED
java.lang.Throwable: Child Error
    at org.apache.hadoop.mapred.TaskRunner.run(TaskRunner.java:271)
Caused by: java.io.IOException: Task process exit with nonzero status of 1.
    at org.apache.hadoop.mapred.TaskRunner.run(TaskRunner.java:258)

12/03/04 10:54:38 INFO mapred.JobClient:  map 3% reduce 0%
12/03/04 10:59:10 INFO mapred.JobClient: Task Id : attempt_201203031851_0004_m_000001_1, Status : FAILED java.lang.IllegalStateException: unregisterHealth: KeeperException - Couldn't delete /_hadoopBsp/job_201203031851_0004/_applicationAttemptsDir/0/_superstepDir/-1/_workerHealthyDir/darkstar_1 at org.apache.giraph.graph.BspServiceWorker.unregisterHealth(BspServiceWorker.java:727) at org.apache.giraph.graph.BspServiceWorker.failureCleanup(BspServiceWorker.java:735)
    at org.apache.giraph.graph.GraphMapper.run(GraphMapper.java:648)
    at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:764)
    at org.apache.hadoop.mapred.MapTask.run(MapTask.java:370)
    at org.apache.hadoop.mapred.Child$4.run(Child.java:255)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:396)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1059)
    at org.apache.hadoop.mapred.Child.main(Child.java:249)
Caused by: org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss for /_hadoopBsp/job_201203031851_0004/_applicationAttemptsDir/0/_superstepDir/-1/_workerHealthyDir/darkstar_1
    at org.apache.zookeeper.KeeperException.create(KeeperException.java:90)
    at org.apache.zookeeper.KeeperException.create(KeeperException.java:42)
    at org.apache.zookeeper.ZooKeeper.delete(ZooKeeper.java:728)
at org.apache.giraph.graph.BspServiceWorker.unregisterHealth(BspServiceWorker.java:721)
    ... 9 more

Task attempt_201203031851_0004_m_000001_1 failed to report status for 601 seconds. Killing! attempt_201203031851_0004_m_000001_1: log4j:WARN No appenders could be found for logger (org.apache.zookeeper.ClientCnxn). attempt_201203031851_0004_m_000001_1: log4j:WARN Please initialize the log4j system properly.
12/03/04 10:59:47 INFO mapred.JobClient:  map 0% reduce 0%
12/03/04 10:59:58 INFO mapred.JobClient: Job complete: job_201203031851_0004
12/03/04 10:59:58 INFO mapred.JobClient: Counters: 6
12/03/04 10:59:58 INFO mapred.JobClient:   Job Counters
12/03/04 10:59:58 INFO mapred.JobClient:     SLOTS_MILLIS_MAPS=977551
12/03/04 10:59:58 INFO mapred.JobClient: Total time spent by all reduces waiting after reserving slots (ms)=0 12/03/04 10:59:58 INFO mapred.JobClient: Total time spent by all maps waiting after reserving slots (ms)=0
12/03/04 10:59:58 INFO mapred.JobClient:     Launched map tasks=7
12/03/04 10:59:58 INFO mapred.JobClient:     SLOTS_MILLIS_REDUCES=0
12/03/04 10:59:58 INFO mapred.JobClient:     Failed map tasks=1
-----------------------------------CUT HERE---------------------------------------------


Thanks,
Abhishek.

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