Hi Prem, Try to remove the pid file and again try to start datanode and tasktracker. If this not work please post the logs here.
-----Original Message----- From: Jain, Prem [mailto:premanshu.j...@netapp.com] Sent: Friday, May 27, 2011 10:32 AM To: hdfs-user@hadoop.apache.org Subject: Can't start datanode? One of my datanodes got hung and I had to reboot and restart the datanode & tasktracker. However the datanode fails to start with the following error message. Thanks in advance. [root@hadoop20 init.d]# ./hadoop-0.20-datanode start Starting Hadoop datanode daemon (hadoop-datanode): starting datanode, logging to /usr/lib/hadoop-0.20/logs/hadoop-hadoop-datanode-hadoop20.out datanode dead but pid file exists [ OK ] [root@hadoop20 init.d]# DISCLAIMER ========== This e-mail may contain privileged and confidential information which is the property of Persistent Systems Ltd. It is intended only for the use of the individual or entity to which it is addressed. If you are not the intended recipient, you are not authorized to read, retain, copy, print, distribute or use this message. If you have received this communication in error, please notify the sender and delete all copies of this message. Persistent Systems Ltd. does not accept any liability for virus infected mails.
