Pseudo Distributed: ERROR org.apache.hadoop.hbase.HServerAddress: Could not resolve the DNS name of localhost.localdomain

On Thu, Jun 7, 2012 at 2:48 PM, Manu S wrote:
Hi All,

In pseudo distributed node HBaseMaster is stopping automatically when we
starts HbaseRegion.

I have changed all the configuration files of Hadoop,Hbase & Zookeeper to
set the exact hostname of the machine. Also commented the localhost entry
from /etc/hosts & cleared the cache as well. There is no entry of
localhost.localdomain entry in these configurations, but this it is
resolving to localhost.localdomain.

Please find the error:
2012-06-07 12:13:11,995 INFO
org.apache.hadoop.hbase.master.MasterFileSystem: No logs to split
2012-06-07 12:13:12,103 ERROR org.apache.hadoop.hbase.HServerAddress: Could
not resolve the DNS name of localhost.localdomain
2012-06-07 12:13:12,104 FATAL org.apache.hadoop.hbase.master.HMaster:
Unhandled exception. Starting shutdown.
java.lang.IllegalArgumentException: hostname can't be null
at java.net.InetSocketAddress.<init>(InetSocketAddress.java:121)
at
org.apache.hadoop.hbase.HServerAddress.getResolvedAddress(HServerAddress.java:108)
at
org.apache.hadoop.hbase.HServerAddress.<init>(HServerAddress.java:64)
at
org.apache.hadoop.hbase.zookeeper.RootRegionTracker.dataToHServerAddress(RootRegionTracker.java:82)
at
org.apache.hadoop.hbase.zookeeper.RootRegionTracker.waitRootRegionLocation(RootRegionTracker.java:73)
at
org.apache.hadoop.hbase.catalog.CatalogTracker.waitForRoot(CatalogTracker.java:222)
at
org.apache.hadoop.hbase.catalog.CatalogTracker.waitForRootServerConnection(CatalogTracker.java:240)
at
org.apache.hadoop.hbase.catalog.CatalogTracker.verifyRootRegionLocation(CatalogTracker.java:487)
at
org.apache.hadoop.hbase.master.HMaster.assignRootAndMeta(HMaster.java:455)
at
org.apache.hadoop.hbase.master.HMaster.finishInitialization(HMaster.java:406)
at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:293)
2012-06-07 12:13:12,106 INFO org.apache.hadoop.hbase.master.HMaster:
Aborting
2012-06-07 12:13:12,106 DEBUG org.apache.hadoop.hbase.master.HMaster:
Stopping service threads

Thanks,
Manu S

On Thu, Jun 7, 2012 at 3:12 PM, Harsh J wrote:

Hey Manu,
as well.

Do not do this. Uncomment it again and please share your current
/etc/hosts and the error you get at HMaster after uncommenting it
(like you would have got before).

127.0.0.1 localhost.localdomain localhost

(The above line is the right line)


--
Harsh J

On Thu, Jun 7, 2012 at 5:16 PM, Manu S wrote:
Thanks a lot Harsh.. Its fixed.. :)
Previously it was
127.0.0.1         localhost

Now it is
127.0.0.1 localhost.localdomain localhost

Why this is always trying to resolve localhost.localdomain even if we
changed the configuration to the hostname?