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
