Running multiple Giraph jobs on the same cluster can lead to port collisions
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Key: GIRAPH-72
URL: https://issues.apache.org/jira/browse/GIRAPH-72
Project: Giraph
Issue Type: Bug
Components: lib, zookeeper
Affects Versions: 0.70.0
Environment: production hadoop cluster, in-process ZK.
Reporter: Jake Mannix
Had a Giraph mini-hackathon at work today, and lots of us launched simultaneous
test jobs at the same time, and often ran into the following collision:
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startSuperstep: WORKER_ONLY - Attempt=0, Superstep=-1
2-Nov-2011 23:40:08
java.net.BindException: Problem binding to <hostname>/<hostIP>:30000 : Address
already in use
at org.apache.hadoop.ipc.Server.bind(Server.java:196)
at org.apache.hadoop.ipc.Server$Listener.(Server.java:259)
at org.apache.hadoop.ipc.Server.(Server.java:1039)
at org.apache.hadoop.ipc.RPC$Server.(RPC.java:492)
at org.apache.hadoop.ipc.RPC.getServer(RPC.java:454)
at
org.apache.giraph.comm.RPCCommunications.getRPCServer(RPCCommunications.java:99)
at
org.apache.giraph.comm.BasicRPCCommunications.(BasicRPCCommunications.java:362)
at org.apache.giraph.comm.RPCCommunications.(RPCCommunications.java:71)
at org.apache.giraph.graph.GraphMapper.map(GraphMapper.java:570)
at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:144)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:583)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:305)
at org.apache.hadoop.mapred.Child.main(Child.java:170)
Caused by: java.net.BindException: Address already in use
at sun.nio.ch.Net.bind(Native Method)
at
sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:126)
at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:59)
at org.apache.hadoop.ipc.Server.bind(Server.java:194)
... 12 more
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The job then simply hung. What it should do, I'd imagine, is at a bare
minimum, catch this exception and allow the task to die quickly so it can get
retried on another machine, or better yet, allow for a command-line arg at
startup (and then passed into the Configuration) decide what ports to use.
Best yet, something automagic which allows multiple GraphMappers on the same
machine without manually picking ports (pick one at random and store it in
zookeeper? but then what about the in-process zookeeper...)
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