[
https://issues.apache.org/jira/browse/HAMA-531?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13281494#comment-13281494
]
Edward J. Yoon commented on HAMA-531:
-------------------------------------
{code}
12/05/23 19:03:17 DEBUG graph.GraphJobRunner: Combiner class:
org.apache.hama.examples.SSSP$MinIntCombiner
12/05/23 19:03:17 DEBUG graph.GraphJobRunner: vertex class:
org.apache.hama.examples.SSSP$ShortestPathVertex
12/05/23 19:03:17 ERROR bsp.BSPTask: Error running bsp setup and bsp function.
java.io.IOException: org.apache.hadoop.io.Text read 31 bytes, should read 190
at org.apache.hadoop.io.SequenceFile$Reader.next(SequenceFile.java:2129)
at
org.apache.hama.bsp.SequenceFileRecordReader.next(SequenceFileRecordReader.java:82)
at
org.apache.hama.bsp.TrackedRecordReader.moveToNext(TrackedRecordReader.java:60)
at
org.apache.hama.bsp.TrackedRecordReader.next(TrackedRecordReader.java:46)
at org.apache.hama.bsp.BSPPeerImpl.readNext(BSPPeerImpl.java:482)
at
org.apache.hama.graph.GraphJobRunner.loadVertices(GraphJobRunner.java:280)
at org.apache.hama.graph.GraphJobRunner.setup(GraphJobRunner.java:113)
at org.apache.hama.bsp.BSPTask.runBSP(BSPTask.java:166)
at org.apache.hama.bsp.BSPTask.run(BSPTask.java:144)
at
org.apache.hama.bsp.GroomServer$BSPPeerChild.main(GroomServer.java:1097)
12/05/23 19:03:17 INFO zookeeper.ZooKeeper: Session: 0x137792074af000e closed
12/05/23 19:03:17 INFO zookeeper.ClientCnxn: EventThread shut down
12/05/23 19:03:17 ERROR bsp.BSPTask: Shutting down ping service.
12/05/23 19:03:17 FATAL bsp.GroomServer: Error running child
java.io.IOException: org.apache.hadoop.io.Text read 31 bytes, should read 190
at org.apache.hadoop.io.SequenceFile$Reader.next(SequenceFile.java:2129)
at
org.apache.hama.bsp.SequenceFileRecordReader.next(SequenceFileRecordReader.java:82)
at
org.apache.hama.bsp.TrackedRecordReader.moveToNext(TrackedRecordReader.java:60)
at
org.apache.hama.bsp.TrackedRecordReader.next(TrackedRecordReader.java:46)
at org.apache.hama.bsp.BSPPeerImpl.readNext(BSPPeerImpl.java:482)
at
org.apache.hama.graph.GraphJobRunner.loadVertices(GraphJobRunner.java:280)
at org.apache.hama.graph.GraphJobRunner.setup(GraphJobRunner.java:113)
at org.apache.hama.bsp.BSPTask.runBSP(BSPTask.java:166)
at org.apache.hama.bsp.BSPTask.run(BSPTask.java:144)
at
org.apache.hama.bsp.GroomServer$BSPPeerChild.main(GroomServer.java:1097)
java.io.IOException: org.apache.hadoop.io.Text read 31 bytes, should read 190
at org.apache.hadoop.io.SequenceFile$Reader.next(SequenceFile.java:2129)
at
org.apache.hama.bsp.SequenceFileRecordReader.next(SequenceFileRecordReader.java:82)
at
org.apache.hama.bsp.TrackedRecordReader.moveToNext(TrackedRecordReader.java:60)
at
org.apache.hama.bsp.TrackedRecordReader.next(TrackedRecordReader.java:46)
at org.apache.hama.bsp.BSPPeerImpl.readNext(BSPPeerImpl.java:482)
at
org.apache.hama.graph.GraphJobRunner.loadVertices(GraphJobRunner.java:280)
at org.apache.hama.graph.GraphJobRunner.setup(GraphJobRunner.java:113)
at org.apache.hama.bsp.BSPTask.runBSP(BSPTask.java:166)
at org.apache.hama.bsp.BSPTask.run(BSPTask.java:144)
at
org.apache.hama.bsp.GroomServer$BSPPeerChild.main(GroomServer.java:1097)
{code}
> Data re-partitioning in BSPJobClient
> ------------------------------------
>
> Key: HAMA-531
> URL: https://issues.apache.org/jira/browse/HAMA-531
> Project: Hama
> Issue Type: Improvement
> Reporter: Edward J. Yoon
> Assignee: Thomas Jungblut
> Attachments: HAMA-531_1.patch, HAMA-531_2.patch, HAMA-531_final.patch
>
>
> The re-partitioning the data is a very expensive operation. By the way,
> currently, we processes read/write operations sequentially using HDFS api in
> BSPJobClient from client-side. This causes potential too many open files
> error, contains HDFS overheads, and shows slow performance.
> We have to find another way to re-partitioning data.
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