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
| | | | | | | | | 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 ... | | | | View on mail-archives.apache.org | Preview by Yahoo | | | | | 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