Hello, I am trying to configure Hadoop in fully distributed mode on three virtual Fedora machines. During configuring I am not getting any error. Even when I am executing the script "start-dfs.sh", there aren't any error.
But practically the namenode isn't able to connect the datanodes. These are the error snippents from the "hadoop-root-datanode-hadoop2.log" files of both datanodes.... ================================================================== 2011-04-08 15:33:03,549 INFO org.apache.hadoop.security.UserGroupInformation: JAAS Configuration already set up for Hadoop, not re-installing. 2011-04-08 15:33:03,691 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: java.io.IOException: Call to hadoop1/192.168.161.198:8020 failed on local exception: java.io.IOException: Connection reset by peer at org.apache.hadoop.ipc.Client.wrapException(Client.java:1139) at org.apache.hadoop.ipc.Client.call(Client.java:1107) at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:226) at $Proxy4.getProtocolVersion(Unknown Source) at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:398) at org.apache.hadoop.ipc.RPC.waitForProxy(RPC.java:342) at org.apache.hadoop.ipc.RPC.waitForProxy(RPC.java:317) at org.apache.hadoop.ipc.RPC.waitForProxy(RPC.java:297) at org.apache.hadoop.hdfs.server.datanode.DataNode.startDataNode(DataNode.java:338) at org.apache.hadoop.hdfs.server.datanode.DataNode.(DataNode.java:280) at org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance(DataNode.java:1527) at org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:1467) at org.apache.hadoop.hdfs.server.datanode.DataNode.createDataNode(DataNode.java:1485) at org.apache.hadoop.hdfs.server.datanode.DataNode.secureMain(DataNode.java:1610) at org.apache.hadoop.hdfs.server.datanode.DataNode.main(DataNode.java:1620) Caused by: java.io.IOException: Connection reset by peer at sun.nio.ch.FileDispatcher.read0(Native Method) at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:21) at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:202) at sun.nio.ch.IOUtil.read(IOUtil.java:175) at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:243) at org.apache.hadoop.net.SocketInputStream$Reader.performIO(SocketInputStream.java:55) at org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:142) at org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:155) at org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:128) at java.io.FilterInputStream.read(FilterInputStream.java:116) at org.apache.hadoop.ipc.Client$Connection$PingInputStream.read(Client.java:375) at java.io.BufferedInputStream.fill(BufferedInputStream.java:218) at java.io.BufferedInputStream.read(BufferedInputStream.java:237) at java.io.DataInputStream.readInt(DataInputStream.java:370) at org.apache.hadoop.ipc.Client$Connection.receiveResponse(Client.java:812) at org.apache.hadoop.ipc.Client$Connection.run(Client.java:720) 2011-04-08 15:33:03,692 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: SHUTDOWN_MSG: /************************************************************ SHUTDOWN_MSG: Shutting down DataNode at hadoop2/127.0.0.1 ************************************************************/ STARTUP_MSG: Starting DataNode STARTUP_MSG: host = hadoop2/127.0.0.1 STARTUP_MSG: args = [] STARTUP_MSG: version = 0.20.2-CDH3B4 STARTUP_MSG: build = -r 3aa7c91592ea1c53f3a913a581dbfcdfebe98bfe; compiled by 'root' on Mon Feb 21 17:31:12 EST 2011 ************************************************************/ 2011-04-08 15:47:46,738 INFO org.apache.hadoop.security.UserGroupInformation: JAAS Configuration already set up for Hadoop, not re-installing. 2011-04-08 15:47:47,839 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop1/192.168.161.198:8020. Already tried 0 time(s). 2011-04-08 15:47:48,849 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop1/192.168.161.198:8020. Already tried 1 time(s). 2011-04-08 15:47:49,859 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop1/192.168.161.198:8020. Already tried 2 time(s). 2011-04-08 15:47:50,869 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop1/192.168.161.198:8020. Already tried 3 time(s). 2011-04-08 15:47:51,878 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop1/192.168.161.198:8020. Already tried 4 time(s). 2011-04-08 15:47:52,889 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop1/192.168.161.198:8020. Already tried 5 time(s). 2011-04-08 15:47:53,900 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop1/192.168.161.198:8020. Already tried 6 time(s). 2011-04-08 15:47:54,908 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop1/192.168.161.198:8020. Already tried 7 time(s). 2011-04-08 15:47:55,917 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop1/192.168.161.198:8020. Already tried 8 time(s). 2011-04-08 15:47:56,926 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop1/192.168.161.198:8020. Already tried 9 time(s). 2011-04-08 15:47:56,928 INFO org.apache.hadoop.ipc.RPC: Server at hadoop1/192.168.161.198:8020 not available yet, Zzzzz... 2011-04-08 15:47:58,944 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop1/192.168.161.198:8020. Already tried 0 time(s). 2011-04-08 15:47:59,953 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop1/192.168.161.198:8020. Already tried 1 time(s). ====================================================================== Can anyone please help me to understand the problem. Thanks in advance. -- View this message in context: http://old.nabble.com/%22Retrying-connect%22-error-while-configuring-hadoop-tp31376243p31376243.html Sent from the Hadoop core-user mailing list archive at Nabble.com.