Hi Puneet, I am not an expert but I had the same error and I solved it by changing the hostnames of the cluster-Pcs in lowercase e.g Make
iHadoop3 -> ihadoop3 -- Xenia 2014-11-02 14:08 GMT+02:00 Puneet Agarwal <puagar...@yahoo.com>: > 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? > > Regards > Puneet (IIT Delhi, India) > > Re: Problem running the PageRank example in a cluster > <http://mail-archives.apache.org/mod_mbox/giraph-user/201310.mbox/%3CCAAjjGef9QT6y_gobLzCFp=SERreJ9Rfv0zOnKpiUfED4S6=a...@mail.gmail.com%3E> > > > > > > > Re: Problem running the PageRank example in a cluster > <http://mail-archives.apache.org/mod_mbox/giraph-user/201310.mbox/%3CCAAjjGef9QT6y_gobLzCFp=SERreJ9Rfv0zOnKpiUfED4S6=a...@mail.gmail.com%3E> > this is the output of the command in all servers: Chain INPUT (policy > ACCEPT) target prot opt source destination ACCEPT tcp -- anywhere anywhere > state NEW tcp dpts:30000:30010 ACCEPT tcp -- anywhere anywhere ... > View on mail-archives.apache.org > <http://mail-archives.apache.org/mod_mbox/giraph-user/201310.mbox/%3CCAAjjGef9QT6y_gobLzCFp=SERreJ9Rfv0zOnKpiUfED4S6=a...@mail.gmail.com%3E> > 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 > > > >
