I had a similar problem under different circumstances. I added the hostname and ip in /etc/hosts file
________________________________ From: Alan Miller [mailto:[email protected]] Sent: Wednesday, August 08, 2012 12:32 PM To: [email protected] Subject: datanode startup before hostname is resovable For development I run CDH4 on my local machine but I notice that I have to manually start the datanode (sudo service hadoop-hdfs-datanode start) after each reboot. Looks like the datanode process is getting started before my DHCP address Is resolvable. From: /var/log/hadoop-hdfs/hadoop-hdfs-datanode-myhost.log 2012-08-08 08:44:01,171 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: STARTUP_MSG: .... STARTUP_MSG: Starting DataNode STARTUP_MSG: host = java.net.UnknownHostException: myhostname: myhostname .... 2012-08-08 08:44:02,253 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: Exception in secureMain java.net.UnknownHostException: myhostname: myhostname SHUTDOWN_MSG: Shutting down DataNode at java.net.UnknownHostException: myhostname: myhostname I'm on Fedora 16/x86_64. Regards, Alan
