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https://issues.apache.org/jira/browse/GIRAPH-321?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eli Reisman updated GIRAPH-321:
-------------------------------
Attachment: GIRAPH-321-1.patch
Should be all set here, if we have 0-size path list then any local paths gets
appended to the front of the pathList for iteration purposes rather than some
other hashed location, avoiding the modulo operation that was hitting the div
by zero.
Sorry for the annoyance! Will check this out a bit more soon, please follow up
if anyone sees any more trouble.
> Divide by 0 exception
> ---------------------
>
> Key: GIRAPH-321
> URL: https://issues.apache.org/jira/browse/GIRAPH-321
> Project: Giraph
> Issue Type: Bug
> Reporter: Avery Ching
> Attachments: GIRAPH-321-1.patch
>
>
> hadoop jar giraph-0.2-SNAPSHOT-for-hadoop-0.20.203.0-jar-with-dependencies.jar
> org.apache.giraph.GiraphRunner \
> org.apache.giraph.examples.SimplePageRankVertex -w 1 \
> -if org.apache.giraph.examples.LongDoubleFloatDoubleTextInputFormat
> -ip graph.txt
> -of
> org.apache.giraph.examples.VertexWithDoubleValueFloatEdgeTextOutputFormat
> -op output
> where graph.txt has the following content:
> 1 2:1.0 3:1.0 4:1.0
> 2 1:1.0 3:1.0
> 3 1:1.0
> 4 1:1.0 3:1.0
> One of the mappers gives throws a divbyzero exception.
> java.lang.ArithmeticException: / by zero
> at
> org.apache.giraph.graph.LocalityInfoSorter.prioritizeLocalInputSplits(LocalityInfoSorter.java:107)
> at
> org.apache.giraph.graph.LocalityInfoSorter.<init>(LocalityInfoSorter.java:71)
> at
> org.apache.giraph.graph.BspServiceWorker.reserveInputSplit(BspServiceWorker.java:228)
> at
> org.apache.giraph.graph.BspServiceWorker.loadVertices(BspServiceWorker.java:317)
> at
> org.apache.giraph.graph.BspServiceWorker.setup(BspServiceWorker.java:604)
> at org.apache.giraph.graph.GraphMapper.setup(GraphMapper.java:368)
> at org.apache.giraph.graph.GraphMapper.run(GraphMapper.java:569)
> 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:1121)
> at org.apache.hadoop.mapred.Child.main(Child.java:249)
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