Hi, I am using Hadoop and Hbase in pseudo distributed mode. I am using Hadoop version - 1.1.2 , Hbase version - 0.94.7 .
I am receiving following error messages in data node log. hadoop-hadoop-datanode-woody.log:2013-10-24 10:55:37,579 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: DatanodeRegistration( 192.168.20.30:5001 0, storageID=DS-1816106352-192.168.20.30-50010-1369314076237, infoPort=50075, ipcPort=50020):Got exception while serving blk_4378636005274237256_55385 to /192.168.20.30: hadoop-hadoop-datanode-woody.log:java.net.SocketTimeoutException: 480000 millis timeout while waiting for channel to be ready for write. ch : java.nio .channels.SocketChannel[connected local=/192.168.20.30:50010 remote=/ 192.168.20.30:60739] hadoop-hadoop-datanode-woody.log:2013-10-24 10:55:37,603 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: DatanodeRegistration( 192.168.20.30:500 10, storageID=DS-1816106352-192.168.20.30-50010-1369314076237, infoPort=50075, ipcPort=50020):DataXceiver hadoop-hadoop-datanode-woody.log:java.net.SocketTimeoutException: 480000 millis timeout while waiting for channel to be ready for write. ch : java.nio .channels.SocketChannel[connected local=/192.168.20.30:50010 remote=/ 192.168.20.30:60739] Please help in understanding the cause behind this. -- Thanks and Regards, Vimal Jain