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From Xenia Demetriou <xenia...@gmail.com>
Subject Re: java.net.ConnectException: Connection refused
Date Mon, 03 Nov 2014 22:37:32 GMT
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 <puagarwal@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=AWg@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=AWg@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=AWg@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
>
>
>
>

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