I have setup a cluster of 4 computers for running my Pregel jobs.
When running a job I often get the following error (given below).I followed
another thread in giraph forums and learnt that this problem is because of the
firewall stopping network traffic.I have stopped the firewall service on all
the machines. These are machines have RHEL 5.5 and I stopped the service using
the command - "service iptables stop"
But I still get the same error.
Can someone tell me what could be causing this service to be blocked on port
30001 on this computer?
RegardsPuneet (IIT Delhi, India)
Re: Problem running the PageRank example in a cluster
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| Re: Problem running the PageRank example in a clusterthis is the output of
the command in all servers:Chain INPUT (policy ACCEPT)target prot opt source
destinationACCEPT tcp -- anywhere anywhere stateNEW tcp dpts:30000:30010ACCEPT
tcp -- anywhere anywhere ... |
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Error===========Using Netty without authentication.
2014-11-02 14:26:24,458 WARN org.apache.giraph.comm.netty.NettyClient:
connectAllAddresses: Future failed to connect with
iHadoop3/172.21.208.178:30001 with 0 failures because of
java.net.ConnectException: Connection refused
2014-11-02 14:26:24,458 INFO org.apache.giraph.comm.netty.NettyClient: Using
Netty without authentication.
2014-11-02 14:26:24,459 INFO org.apache.giraph.comm.netty.NettyClient:
connectAllAddresses: Successfully added 0 connections, (0 total connected) 1
failed, 1 failures total.
2014-11-02 14:26:24,499 WARN
org.apache.giraph.comm.netty.handler.ResponseClientHandler: exceptionCaught:
Channel failed with remote address null
java.net.ConnectException: Connection refused
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)2014-11-02
14:26:24,459 INFO org.apache.giraph.comm.netty.NettyClient:
connectAllAddresses: Successfully added 0 connections, (0 total connected) 1
failed, 1 failures total.
2014-11-02 14:26:24,499 WARN
org.apache.giraph.comm.netty.handler.ResponseClientHandler: exceptionCaught:
Channel failed with remote address null
java.net.ConnectException: Connection refusedjava.net.ConnectException:
Connection refused
