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From Andro Bermúdez Serrano <andro.bermu...@gmail.com>
Subject Problem running the PageRank example in a cluster
Date Mon, 21 Oct 2013 14:37:10 GMT
Hello.
I am using Giraph 1.0.0 with hadoop 1.2.1. With the pseudo-distributed
installation of hadoop the execution was succefully. Now I am trying
to run the same example but in a cluster. So far, I can't continue
because error in tasks. The exception: java.net.ConnectException. My
experience in hadoop is almost null.

Thanks.

2013-10-21 10:11:58,152 INFO org.apache.hadoop.util.NativeCodeLoader:
Loaded the native-hadoop library
2013-10-21 10:11:58,743 WARN
org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Source name ugi
already exists!
2013-10-21 10:11:59,431 INFO org.apache.hadoop.util.ProcessTree:
setsid exited with exit code 0
2013-10-21 10:11:59,491 INFO org.apache.hadoop.mapred.Task:  Using
ResourceCalculatorPlugin :
org.apache.hadoop.util.LinuxResourceCalculatorPlugin@34bb5def
2013-10-21 10:11:59,632 INFO org.apache.hadoop.mapred.MapTask:
Processing split: 'org.apache.giraph.bsp.BspInputSplit, index=-1,
num=-1
2013-10-21 10:11:59,778 INFO org.apache.giraph.graph.GraphTaskManager:
setup: Log level remains at info
2013-10-21 10:12:00,426 INFO org.apache.giraph.graph.GraphTaskManager:
Distributed cache is empty. Assuming fatjar.
2013-10-21 10:12:00,454 INFO org.apache.giraph.graph.GraphTaskManager:
setup: classpath @
/app/hadoop/tmp/mapred/local/taskTracker/hadoop-user/jobcache/job_201310210926_0004/jars/job.jar
for job Giraph: org.apache.giraph.examples.SimplePageRankVertex
2013-10-21 10:12:03,054 INFO org.apache.giraph.zk.ZooKeeperManager:
createCandidateStamp: Made the directory
_bsp/_defaultZkManagerDir/job_201310210926_0004
2013-10-21 10:12:03,564 INFO org.apache.giraph.zk.ZooKeeperManager:
createCandidateStamp: Creating my filestamp
_bsp/_defaultZkManagerDir/job_201310210926_0004/_task/hdnode01 0
2013-10-21 10:12:06,635 INFO org.apache.giraph.zk.ZooKeeperManager:
getZooKeeperServerList: Got [hdnode02, hdnode01] 2 hosts from 2
candidates when 1 required (polling period is 3000) on attempt 0
2013-10-21 10:12:06,635 INFO org.apache.giraph.zk.ZooKeeperManager:
createZooKeeperServerList: Creating the final ZooKeeper file
'_bsp/_defaultZkManagerDir/job_201310210926_0004/zkServerList_hdnode02
1 '
2013-10-21 10:12:10,754 INFO org.apache.giraph.zk.ZooKeeperManager:
getZooKeeperServerList: For task 0, got file 'zkServerList_hdnode02 1
' (polling period is 3000)
2013-10-21 10:12:10,754 INFO org.apache.giraph.zk.ZooKeeperManager:
getZooKeeperServerList: Found [hdnode02, 1] 2 hosts in filename
'zkServerList_hdnode02 1 '
2013-10-21 10:12:10,757 INFO org.apache.giraph.zk.ZooKeeperManager:
onlineZooKeeperSErvers: Empty directory
_bsp/_defaultZkManagerDir/job_201310210926_0004/_zkServer, waiting
3000 msecs.
2013-10-21 10:12:13,760 INFO org.apache.giraph.zk.ZooKeeperManager:
onlineZooKeeperServers: Got [hdnode02] 1 hosts from 1 ready servers
when 1 required (polling period is 3000) on attempt 1
2013-10-21 10:12:13,783 INFO org.apache.giraph.graph.GraphTaskManager:
setup: Starting up BspServiceWorker...
2013-10-21 10:12:13,811 INFO org.apache.giraph.bsp.BspService:
BspService: Connecting to ZooKeeper with job job_201310210926_0004, 0
on hdnode02:22181
2013-10-21 10:12:13,820 INFO org.apache.zookeeper.ZooKeeper: Client
environment:zookeeper.version=3.3.3-1073969, built on 02/23/2011 22:27
GMT
2013-10-21 10:12:13,820 INFO org.apache.zookeeper.ZooKeeper: Client
environment:host.name=hdnode01
2013-10-21 10:12:13,820 INFO org.apache.zookeeper.ZooKeeper: Client
environment:java.version=1.7.0_25
2013-10-21 10:12:13,820 INFO org.apache.zookeeper.ZooKeeper: Client
environment:java.vendor=Oracle Corporation
2013-10-21 10:12:13,820 INFO org.apache.zookeeper.ZooKeeper: Client
environment:java.home=/usr/lib/jvm/java-7-openjdk-amd64/jre
2013-10-21 10:12:13,820 INFO org.apache.zookeeper.ZooKeeper: Client
environment:java.class.path=/app/hadoop/tmp/mapred/local/taskTracker/hadoop-user/jobcache/job_201310210926_0004/jars/classes:/app/hadoop/tmp/mapred/local/taskTracker/hadoop-user/jobcache/job_201310210926_0004/jars:/app/hadoop/tmp/mapred/local/taskTracker/hadoop-user/jobcache/job_201310210926_0004/attempt_201310210926_0004_m_000000_0/work:/usr/local/hadoop/libexec/../conf:/usr/lib/jvm/java-7-openjdk-amd64/lib/tools.jar:/usr/local/hadoop/libexec/..:/usr/local/hadoop/libexec/../hadoop-core-1.2.1.jar:/usr/local/hadoop/libexec/../lib/asm-3.2.jar:/usr/local/hadoop/libexec/../lib/aspectjrt-1.6.11.jar:/usr/local/hadoop/libexec/../lib/aspectjtools-1.6.11.jar:/usr/local/hadoop/libexec/../lib/commons-beanutils-1.7.0.jar:/usr/local/hadoop/libexec/../lib/commons-beanutils-core-1.8.0.jar:/usr/local/hadoop/libexec/../lib/commons-cli-1.2.jar:/usr/local/hadoop/libexec/../lib/commons-codec-1.4.jar:/usr/local/hadoop/libexec/../lib/commons-collections-3.2.1.jar:/usr/local/hadoop/libexec/../lib/commons-configuration-1.6.jar:/usr/local/hadoop/libexec/../lib/commons-daemon-1.0.1.jar:/usr/local/hadoop/libexec/../lib/commons-digester-1.8.jar:/usr/local/hadoop/libexec/../lib/commons-el-1.0.jar:/usr/local/hadoop/libexec/../lib/commons-httpclient-3.0.1.jar:/usr/local/hadoop/libexec/../lib/commons-io-2.1.jar:/usr/local/hadoop/libexec/../lib/commons-lang-2.4.jar:/usr/local/hadoop/libexec/../lib/commons-logging-1.1.1.jar:/usr/local/hadoop/libexec/../lib/commons-logging-api-1.0.4.jar:/usr/local/hadoop/libexec/../lib/commons-math-2.1.jar:/usr/local/hadoop/libexec/../lib/commons-net-3.1.jar:/usr/local/hadoop/libexec/../lib/core-3.1.1.jar:/usr/local/hadoop/libexec/../lib/hadoop-capacity-scheduler-1.2.1.jar:/usr/local/hadoop/libexec/../lib/hadoop-fairscheduler-1.2.1.jar:/usr/local/hadoop/libexec/../lib/hadoop-thriftfs-1.2.1.jar:/usr/local/hadoop/libexec/../lib/hsqldb-1.8.0.10.jar:/usr/local/hadoop/libexec/../lib/jackson-core-asl-1.8.8.jar:/usr/local/hadoop/libexec/../lib/jackson-mapper-asl-1.8.8.jar:/usr/local/hadoop/libexec/../lib/jasper-compiler-5.5.12.jar:/usr/local/hadoop/libexec/../lib/jasper-runtime-5.5.12.jar:/usr/local/hadoop/libexec/../lib/jdeb-0.8.jar:/usr/local/hadoop/libexec/../lib/jersey-core-1.8.jar:/usr/local/hadoop/libexec/../lib/jersey-json-1.8.jar:/usr/local/hadoop/libexec/../lib/jersey-server-1.8.jar:/usr/local/hadoop/libexec/../lib/jets3t-0.6.1.jar:/usr/local/hadoop/libexec/../lib/jetty-6.1.26.jar:/usr/local/hadoop/libexec/../lib/jetty-util-6.1.26.jar:/usr/local/hadoop/libexec/../lib/jsch-0.1.42.jar:/usr/local/hadoop/libexec/../lib/junit-4.5.jar:/usr/local/hadoop/libexec/../lib/kfs-0.2.2.jar:/usr/local/hadoop/libexec/../lib/log4j-1.2.15.jar:/usr/local/hadoop/libexec/../lib/mockito-all-1.8.5.jar:/usr/local/hadoop/libexec/../lib/oro-2.0.8.jar:/usr/local/hadoop/libexec/../lib/servlet-api-2.5-20081211.jar:/usr/local/hadoop/libexec/../lib/slf4j-api-1.4.3.jar:/usr/local/hadoop/libexec/../lib/slf4j-log4j12-1.4.3.jar:/usr/local/hadoop/libexec/../lib/xmlenc-0.52.jar:/usr/local/hadoop/libexec/../lib/jsp-2.1/jsp-2.1.jar:/usr/local/hadoop/libexec/../lib/jsp-2.1/jsp-api-2.1.jar
2013-10-21 10:12:13,820 INFO org.apache.zookeeper.ZooKeeper: Client
environment:java.library.path=/usr/local/hadoop/libexec/../lib/native/Linux-amd64-64:/app/hadoop/tmp/mapred/local/taskTracker/hadoop-user/jobcache/job_201310210926_0004/attempt_201310210926_0004_m_000000_0/work
2013-10-21 10:12:13,820 INFO org.apache.zookeeper.ZooKeeper: Client
environment:java.io.tmpdir=/app/hadoop/tmp/mapred/local/taskTracker/hadoop-user/jobcache/job_201310210926_0004/attempt_201310210926_0004_m_000000_0/work/tmp
2013-10-21 10:12:13,820 INFO org.apache.zookeeper.ZooKeeper: Client
environment:java.compiler=<NA>
2013-10-21 10:12:13,820 INFO org.apache.zookeeper.ZooKeeper: Client
environment:os.name=Linux
2013-10-21 10:12:13,820 INFO org.apache.zookeeper.ZooKeeper: Client
environment:os.arch=amd64
2013-10-21 10:12:13,820 INFO org.apache.zookeeper.ZooKeeper: Client
environment:os.version=3.8.0-32-generic
2013-10-21 10:12:13,820 INFO org.apache.zookeeper.ZooKeeper: Client
environment:user.name=hadoop-user
2013-10-21 10:12:13,820 INFO org.apache.zookeeper.ZooKeeper: Client
environment:user.home=/home/hadoop-user
2013-10-21 10:12:13,820 INFO org.apache.zookeeper.ZooKeeper: Client
environment:user.dir=/app/hadoop/tmp/mapred/local/taskTracker/hadoop-user/jobcache/job_201310210926_0004/attempt_201310210926_0004_m_000000_0/work
2013-10-21 10:12:13,821 INFO org.apache.zookeeper.ZooKeeper:
Initiating client connection, connectString=hdnode02:22181
sessionTimeout=60000
watcher=org.apache.giraph.worker.BspServiceWorker@54bf0a6b
2013-10-21 10:12:13,861 INFO org.apache.zookeeper.ClientCnxn: Opening
socket connection to server hdnode02/172.24.10.72:22181
2013-10-21 10:12:13,870 INFO org.apache.zookeeper.ClientCnxn: Socket
connection established to hdnode02/172.24.10.72:22181, initiating
session
2013-10-21 10:12:13,999 INFO org.apache.zookeeper.ClientCnxn: Session
establishment complete on server hdnode02/172.24.10.72:22181,
sessionid = 0x141db5bd0d70000, negotiated timeout = 600000
2013-10-21 10:12:14,001 INFO org.apache.giraph.bsp.BspService:
process: Asynchronous connection complete.
2013-10-21 10:12:14,009 INFO
org.apache.giraph.comm.netty.NettyWorkerServer:
createMessageStoreFactory: Using ByteArrayMessagesPerVertexStore since
there is no combiner
2013-10-21 10:12:14,216 INFO org.apache.giraph.comm.netty.NettyServer:
NettyServer: Using execution handler with 8 threads after
requestFrameDecoder.
2013-10-21 10:12:14,369 INFO org.apache.giraph.comm.netty.NettyServer:
start: Started server communication server:
hdnode01/172.24.9.185:30000 with up to 16 threads on bind attempt 0
with sendBufferSize = 32768 receiveBufferSize = 524288 backlog = 1
2013-10-21 10:12:14,376 INFO org.apache.giraph.comm.netty.NettyClient:
NettyClient: Using execution handler with 8 threads after
requestEncoder.
2013-10-21 10:12:14,388 INFO org.apache.giraph.graph.GraphTaskManager:
setup: Registering health of this worker...
2013-10-21 10:12:14,637 INFO org.apache.giraph.bsp.BspService:
process: applicationAttemptChanged signaled
2013-10-21 10:12:14,788 WARN org.apache.giraph.bsp.BspService:
process: Unknown and unprocessed event
(path=/_hadoopBsp/job_201310210926_0004/_applicationAttemptsDir/0/_superstepDir,
type=NodeChildrenChanged, state=SyncConnected)
2013-10-21 10:12:14,811 INFO
org.apache.giraph.worker.BspServiceWorker: registerHealth: Created my
health node for attempt=0, superstep=-1 with
/_hadoopBsp/job_201310210926_0004/_applicationAttemptsDir/0/_superstepDir/-1/_workerHealthyDir/hdnode01_0
and workerInfo= Worker(hostname=hdnode01, MRtaskID=0, port=30000)
2013-10-21 10:12:15,568 INFO org.apache.giraph.comm.netty.NettyServer:
start: Using Netty without authentication.
2013-10-21 10:12:15,637 INFO org.apache.giraph.bsp.BspService:
process: partitionAssignmentsReadyChanged (partitions are assigned)
2013-10-21 10:12:15,654 INFO
org.apache.giraph.worker.BspServiceWorker: startSuperstep:
Master(hostname=hdnode02, MRtaskID=1, port=30001)
2013-10-21 10:12:15,654 INFO
org.apache.giraph.worker.BspServiceWorker: startSuperstep: Ready for
computation on superstep -1 since worker selection and vertex range
assignments are done in
/_hadoopBsp/job_201310210926_0004/_applicationAttemptsDir/0/_superstepDir/-1/_addressesAndPartitions
2013-10-21 10:12:15,656 INFO org.apache.giraph.comm.netty.NettyClient:
Using Netty without authentication.
2013-10-21 10:12:15,671 WARN org.apache.giraph.comm.netty.NettyClient:
connectAllAddresses: Future failed to connect with
hdnode02/172.24.10.72:30001 with 0 failures because of
java.net.ConnectException: Connection refused
2013-10-21 10:12:15,671 INFO org.apache.giraph.comm.netty.NettyClient:
Using Netty without authentication.
2013-10-21 10:12:15,672 INFO org.apache.giraph.comm.netty.NettyClient:
connectAllAddresses: Successfully added 0 connections, (0 total
connected) 1 failed, 1 failures total.
2013-10-21 10:12:15,677 WARN org.apache.giraph.comm.netty.NettyClient:
connectAllAddresses: Future failed to connect with
hdnode02/172.24.10.72:30001 with 1 failures because of
java.net.ConnectException: Connection refused
2013-10-21 10:12:15,677 INFO org.apache.giraph.comm.netty.NettyClient:
Using Netty without authentication.
2013-10-21 10:12:15,677 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)
	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:708)
	at org.jboss.netty.channel.socket.nio.NioClientSocketPipelineSink$Boss.connect(NioClientSocketPipelineSink.java:404)
	at org.jboss.netty.channel.socket.nio.NioClientSocketPipelineSink$Boss.processSelectedKeys(NioClientSocketPipelineSink.java:366)
	at org.jboss.netty.channel.socket.nio.NioClientSocketPipelineSink$Boss.run(NioClientSocketPipelineSink.java:282)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:724)
2013-10-21 10:12:15,681 INFO org.apache.giraph.comm.netty.NettyClient:
connectAllAddresses: Successfully added 0 connections, (0 total
connected) 1 failed, 2 failures total.
2013-10-21 10:12:15,682 WARN org.apache.giraph.comm.netty.NettyClient:
connectAllAddresses: Future failed to connect with
hdnode02/172.24.10.72:30001 with 2 failures because of
java.net.ConnectException: Connection refused
2013-10-21 10:12:15,682 INFO org.apache.giraph.comm.netty.NettyClient:
Using Netty without authentication.
2013-10-21 10:12:15,684 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)
	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:708)
	at org.jboss.netty.channel.socket.nio.NioClientSocketPipelineSink$Boss.connect(NioClientSocketPipelineSink.java:404)
	at org.jboss.netty.channel.socket.nio.NioClientSocketPipelineSink$Boss.processSelectedKeys(NioClientSocketPipelineSink.java:366)
	at org.jboss.netty.channel.socket.nio.NioClientSocketPipelineSink$Boss.run(NioClientSocketPipelineSink.java:282)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:724)
2013-10-21 10:12:15,686 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)
	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:708)
	at org.jboss.netty.channel.socket.nio.NioClientSocketPipelineSink$Boss.connect(NioClientSocketPipelineSink.java:404)
	at org.jboss.netty.channel.socket.nio.NioClientSocketPipelineSink$Boss.processSelectedKeys(NioClientSocketPipelineSink.java:366)
	at org.jboss.netty.channel.socket.nio.NioClientSocketPipelineSink$Boss.run(NioClientSocketPipelineSink.java:282)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:724)
2013-10-21 10:12:15,687 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)
	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:708)
	at org.jboss.netty.channel.socket.nio.NioClientSocketPipelineSink$Boss.connect(NioClientSocketPipelineSink.java:404)
	at org.jboss.netty.channel.socket.nio.NioClientSocketPipelineSink$Boss.processSelectedKeys(NioClientSocketPipelineSink.java:366)
	at org.jboss.netty.channel.socket.nio.NioClientSocketPipelineSink$Boss.run(NioClientSocketPipelineSink.java:282)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:724)
2013-10-21 10:12:15,686 INFO org.apache.giraph.comm.netty.NettyClient:
connectAllAddresses: Successfully added 0 connections, (0 total
connected) 1 failed, 3 failures total.
2013-10-21 10:12:15,688 WARN org.apache.giraph.comm.netty.NettyClient:
connectAllAddresses: Future failed to connect with
hdnode02/172.24.10.72:30001 with 3 failures because of
java.net.ConnectException: Connection refused
2013-10-21 10:12:15,688 INFO org.apache.giraph.comm.netty.NettyClient:
Using Netty without authentication.
2013-10-21 10:12:15,688 INFO org.apache.giraph.comm.netty.NettyClient:
connectAllAddresses: Successfully added 0 connections, (0 total
connected) 1 failed, 4 failures total.
2013-10-21 10:12:15,689 WARN org.apache.giraph.comm.netty.NettyClient:
connectAllAddresses: Future failed to connect with
hdnode02/172.24.10.72:30001 with 4 failures because of
java.net.ConnectException: Connection refused
2013-10-21 10:12:15,689 INFO org.apache.giraph.comm.netty.NettyClient:
Using Netty without authentication.
2013-10-21 10:12:15,690 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)
	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:708)
	at org.jboss.netty.channel.socket.nio.NioClientSocketPipelineSink$Boss.connect(NioClientSocketPipelineSink.java:404)
	at org.jboss.netty.channel.socket.nio.NioClientSocketPipelineSink$Boss.processSelectedKeys(NioClientSocketPipelineSink.java:366)
	at org.jboss.netty.channel.socket.nio.NioClientSocketPipelineSink$Boss.run(NioClientSocketPipelineSink.java:282)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:724)
2013-10-21 10:12:15,690 INFO org.apache.giraph.comm.netty.NettyClient:
connectAllAddresses: Successfully added 0 connections, (0 total
connected) 1 failed, 5 failures total.
2013-10-21 10:12:15,692 WARN org.apache.giraph.comm.netty.NettyClient:
connectAllAddresses: Future failed to connect with
hdnode02/172.24.10.72:30001 with 5 failures because of
java.net.ConnectException: Connection refused
2013-10-21 10:12:15,692 INFO org.apache.giraph.comm.netty.NettyClient:
Using Netty without authentication.
2013-10-21 10:12:15,692 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)
	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:708)
	at org.jboss.netty.channel.socket.nio.NioClientSocketPipelineSink$Boss.connect(NioClientSocketPipelineSink.java:404)
	at org.jboss.netty.channel.socket.nio.NioClientSocketPipelineSink$Boss.processSelectedKeys(NioClientSocketPipelineSink.java:366)
	at org.jboss.netty.channel.socket.nio.NioClientSocketPipelineSink$Boss.run(NioClientSocketPipelineSink.java:282)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:724)
2013-10-21 10:12:15,693 INFO org.apache.giraph.comm.netty.NettyClient:
connectAllAddresses: Successfully added 0 connections, (0 total
connected) 1 failed, 6 failures total.
2013-10-21 10:12:15,693 WARN org.apache.giraph.comm.netty.NettyClient:
connectAllAddresses: Future failed to connect with
hdnode02/172.24.10.72:30001 with 6 failures because of
java.net.ConnectException: Connection refused
2013-10-21 10:12:15,693 INFO org.apache.giraph.comm.netty.NettyClient:
Using Netty without authentication.
2013-10-21 10:12:15,694 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)
	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:708)
	at org.jboss.netty.channel.socket.nio.NioClientSocketPipelineSink$Boss.connect(NioClientSocketPipelineSink.java:404)
	at org.jboss.netty.channel.socket.nio.NioClientSocketPipelineSink$Boss.processSelectedKeys(NioClientSocketPipelineSink.java:366)
	at org.jboss.netty.channel.socket.nio.NioClientSocketPipelineSink$Boss.run(NioClientSocketPipelineSink.java:282)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:724)

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