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From David Garcia <>
Subject Re: Vertex exists error when processing input splits for Sequence file
Date Mon, 30 Jan 2012 04:13:48 GMT

Hello, I get this error when I try run my job:

2012-01-29 21:50:18,494 INFO org.apache.giraph.graph.BspServiceWorker: reserveInputSplit:
reservedPath = null, 1 of 1 InputSplits are finished.
2012-01-29 21:50:18,494 INFO org.apache.giraph.graph.BspServiceWorker: setup: Finally loaded
a total of (v=0, e=0)
2012-01-29 21:50:18,764 INFO org.apache.giraph.graph.BspService: process: inputSplitsAllDoneChanged
(all vertices sent from input splits)
2012-01-29 21:50:18,766 ERROR org.apache.giraph.graph.GraphMapper: setup: Caught exception
just before end of setup

java.lang.IllegalStateException: moveVerticesToWorker: Vertex Vertex(id=zzYNBgKt2LF6ClLA2eMBzuN7SkA.,,#edges=0)
already exists!
        at org.apache.giraph.graph.BspServiceWorker.movePartitionsToWorker(
        at org.apache.giraph.graph.BspServiceWorker.setup(
        at org.apache.giraph.graph.GraphMapper.setup(




I'm not sure where the start debugging. . .BspServiceWorker is hella big.  All input is welcome.
 As I mentioned, I'm processing a sequenceFile that has Text keys and MapWritable Values.
 I would like the vertices to have Text indices and MapWritable values.  (I'm not inserting
any edges for the time being. . .I just want to see the file get split properly).  I have
implemented custom input formats and record readers.  Thx


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