These days we are focusing more on the netty IPC. Can you try
-Dgiraph.useNetty=true?
Avery
On 9/10/12 2:08 PM, Franco Maria Nardini wrote:
Dear all,
I am working with Giraph 0.2/Hadoop 1.0.3. In particular, I am trying
to execute the following code:
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 2 \
-if
org.apache.giraph.examples.SimplePageRankVertex\$SimplePageRankVertexInputFormat
-ip bigGraph.txt \
-of org.apache.giraph.io.IdWithValueTextOutputFormat -op output \
-mc
org.apache.giraph.examples.SimplePageRankVertex\$HDFSBasedPageRankVertexMasterCompute
If I set the number of workers equal to two, one of the mappers produce:
ava.lang.RuntimeException: java.io.IOException: Call to
zipottero.local/172.20.10.3:30001 failed on local exception:
java.io.EOFException
at
org.apache.giraph.comm.BasicRPCCommunications.sendPartitionRequest(BasicRPCCommunications.java:923)
at
org.apache.giraph.graph.BspServiceWorker.loadVertices(BspServiceWorker.java:327)
at
org.apache.giraph.graph.BspServiceWorker.setup(BspServiceWorker.java:604)
at org.apache.giraph.graph.GraphMapper.setup(GraphMapper.java:377)
at org.apache.giraph.graph.GraphMapper.run(GraphMapper.java:578)
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$4.run(Child.java:255)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1121)
at org.apache.hadoop.mapred.Child.main(Child.java:249)
Caused by: java.io.IOException: Call to
zipottero.local/172.20.10.3:30001 failed on local exception:
java.io.EOFException
at org.apache.hadoop.ipc.Client.wrapException(Client.java:1107)
at org.apache.hadoop.ipc.Client.call(Client.java:1075)
at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:225)
at $Proxy3.putVertexList(Unknown Source)
at
org.apache.giraph.comm.BasicRPCCommunications.sendPartitionRequest(BasicRPCCommunications.java:920)
... 11 more
Caused by: java.io.EOFException
at java.io.DataInputStream.readInt(DataInputStream.java:375)
at
org.apache.hadoop.ipc.Client$Connection.receiveResponse(Client.java:804)
at org.apache.hadoop.ipc.Client$Connection.run(Client.java:749)
while it perfectly works if the number of workers is set to 1. I am
experiencing the problem both on small and big graphs.
Any idea of the reasons behind this behavior?
Thanks a lot in advance.
Best,
FM
--
Franco Maria Nardini
High Performance Computing Laboratory
Istituto di Scienza e Tecnologie dell’Informazione (ISTI)
Consiglio Nazionale delle Ricerche (CNR)
Via G. Moruzzi, 1
56124, Pisa, Italy
Phone: +39 050 315 3496
Fax: +39 050 315 2040
Mail: francomaria.nard...@isti.cnr.it
Skype: francomaria.nardini
Web: http://hpc.isti.cnr.it/~nardini/
