Hi again. Other tools, like balancer, or the web browsing from namenode, don't work as well. This because other nodes complain about not reaching the offending node as well.
I even tried netcat'ing the IP/port from another node - and it successfully connected. Any advice on this "No route to host" error? 2009/4/21 Stas Oskin <stas.os...@gmail.com> > Hi. > > I have quite a strange issue, where one of the datanodes that I have, > rejects any blocks with error messages. > > I looked in the datanode logs, and found the following error: > > 2009-04-21 16:59:19,092 ERROR org.apache.hadoop.dfs.DataNode: > DatanodeRegistration(192.168.253.20:50010, > storageID=DS-1790181121-127.0.0.1-50010-1239123237447, infoPort=50075, > ipcPort=50020):DataXceiver: java.net.NoRouteToHostException: No route to > host > at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) > at > sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:574) > at > org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206) > at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:402) > at > org.apache.hadoop.dfs.DataNode$DataXceiver.writeBlock(DataNode.java:1255) > at > org.apache.hadoop.dfs.DataNode$DataXceiver.run(DataNode.java:1092) > at java.lang.Thread.run(Thread.java:619) > > 2009-04-21 16:59:31,047 INFO org.apache.hadoop.dfs.DataNode: Receiving > block blk_1882546734729403703_7805 src: /192.168.253.32:54917 dest: / > 192.168.253.32:50010 > 2009-04-21 16:59:31,048 INFO org.apache.hadoop.dfs.DataNode: writeBlock > blk_1882546734729403703_7805 received exception > java.net.NoRouteToHostException: No route to host > > > Several facts: > > 1) I use the stable 0.18.3 > 2) It worked before correctly, before I had an overall power crash which > brought down all the machines. > 3) This datanode is located on same machine as the NameNode and the > SecondaryNameNode. > 4) I can ping the machine from itself - no error messages. > > Any idea what should be done to resolve it? > > Thanks in advance. >
