Hi Dhana, Increase the ulimit for all the datanodes.
If you are starting the service using hadoop increase the ulimit value for hadoop user. Do the changes in the following file. */etc/security/limits.conf* Example:- *hadoop soft nofile 35000* *hadoop hard nofile 35000* Regards, Varun Kumar.P On Fri, Mar 8, 2013 at 1:15 PM, Dhanasekaran Anbalagan <bugcy...@gmail.com>wrote: > Hi Guys > > I am frequently getting is error in my Data nodes. > > Please guide what is the exact problem this. > > dvcliftonhera138:50010:DataXceiver error processing WRITE_BLOCK operation > src: /172.16.30.138:50373 dest: /172.16.30.138:50010 > java.net.SocketTimeoutException: 70000 millis timeout while waiting for > channel to be ready for read. ch : java.nio.channels.SocketChannel[connected > local=/172.16.30.138:34280 remote=/172.16.30.140:50010] > > > at > org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:164) > at org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:154) > at org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:127) > > > at org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:115) > at java.io.FilterInputStream.read(FilterInputStream.java:66) > at java.io.FilterInputStream.read(FilterInputStream.java:66) > at > org.apache.hadoop.hdfs.protocol.HdfsProtoUtil.vintPrefixed(HdfsProtoUtil.java:160) > > > at > org.apache.hadoop.hdfs.server.datanode.DataXceiver.writeBlock(DataXceiver.java:405) > at > org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opWriteBlock(Receiver.java:98) > at > org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:66) > > > at > org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:189) > at java.lang.Thread.run(Thread.java:662) > > > dvcliftonhera138:50010:DataXceiver error processing WRITE_BLOCK operation > src: /172.16.30.138:50531 dest: /172.16.30.138:50010 > java.io.EOFException: while trying to read 65563 bytes > > > at > org.apache.hadoop.hdfs.server.datanode.BlockReceiver.readToBuf(BlockReceiver.java:408) > at > org.apache.hadoop.hdfs.server.datanode.BlockReceiver.readNextPacket(BlockReceiver.java:452) > at > org.apache.hadoop.hdfs.server.datanode.BlockReceiver.receivePacket(BlockReceiver.java:511) > > > at > org.apache.hadoop.hdfs.server.datanode.BlockReceiver.receiveBlock(BlockReceiver.java:748) > at > org.apache.hadoop.hdfs.server.datanode.DataXceiver.writeBlock(DataXceiver.java:462) > at > org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opWriteBlock(Receiver.java:98) > > > at > org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:66) > at > org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:189) > at java.lang.Thread.run(Thread.java:662) > > > > > How to resolve this. > > -Dhanasekaran. > > Did I learn something today? If not, I wasted it. > > -- > > > > -- Regards, Varun Kumar.P
