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From "Alessandro Presta (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (GIRAPH-351) Fail job early when there is no input
Date Wed, 03 Oct 2012 23:47:08 GMT

    [ https://issues.apache.org/jira/browse/GIRAPH-351?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13468989#comment-13468989
] 

Alessandro Presta commented on GIRAPH-351:
------------------------------------------

+1, this has bugged me for a while too :)
                
> Fail job early when there is no input
> -------------------------------------
>
>                 Key: GIRAPH-351
>                 URL: https://issues.apache.org/jira/browse/GIRAPH-351
>             Project: Giraph
>          Issue Type: Improvement
>            Reporter: Avery Ching
>            Assignee: Avery Ching
>         Attachments: GIRAPH-351.2.patch, GIRAPH-351.patch
>
>
> Right now we get a cryptic error message when we know that there is no input!
> 2012-09-28 13:45:20,410 INFO org.apache.giraph.graph.BspServiceMaster: generateInputSplits:
Got 0 input splits for 100 workers
> 2012-09-28 13:45:20,410 WARN org.apache.giraph.graph.BspServiceMaster: createInputSplits:
Number of inputSplits=0 < 100=number of healthy processes, some workers will be not used
> But the job keeps on going and the workers get the exception 
> java.lang.IllegalStateException: setup: loadVertices failed due to KeeperException
> 	at org.apache.giraph.graph.BspServiceWorker.setup(BspServiceWorker.java:628)
> 	at org.apache.giraph.graph.GraphMapper.setup(GraphMapper.java:370)
> 	at org.apache.giraph.graph.GraphMapper.run(GraphMapper.java:570)
> 	at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:632)
> 	at org.apache.hadoop.mapred.MapTask.run(MapTask.java:307)
> 	at org.apache.hadoop.mapred.Child.main(Child.java:171)
> Caused by: org.apache.zookeeper.KeeperException$NoNodeException: KeeperErrorCode = NoNode
for /_hadoopBsp/job_201209271814.325_0001/_inputSplitDir
> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:102)
> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:42)
> 	at org.apache.zookeeper.ZooKeeper.getChildren(ZooKeeper.java:1243)
> 	at org.apache.zookeeper.ZooKeeper.getChildren(ZooKeeper.java:1271)
> 	at org.apache.giraph.zk.ZooKeeperExt.getChildrenExt(ZooKeeperExt.java:273)
> 	at org.apache.giraph.graph.BspServiceWorker.reserveInputSplit(BspServiceWorker.java:225)
> 	at org.apache.giraph.graph.BspServiceWorker.loadVertices(BspServiceWorker.java:320)
> 	at org.apache.giraph.graph.BspServiceWorker.setup(BspServiceWorker.java:607)
> 	... 5 more

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