HBase Error - assignment of -ROOT- failure

Question

I've just installed hadoop and hbase from cloudera (3) but when I try to go to http://localhost:60010 it just sits there continually loading.

I can get to the regionserver fine - http://localhost:60030... Looking at the master hbase server logs I can see the following.

Looks like a problem with the root region.

All of this is installed on a ext4 1TB partition running Ubuntu (Natty) 11. No cluster/other boxes).

Any help would be great!

11/05/15 19:58:27 WARN master.AssignmentManager: Failed assignment of -ROOT-,,0.70236052 to serverName=localhost,60020,1305452402149, load=(requests=0, regions=0, usedHeap=24, maxHeap=995), trying to assign elsewhere instead; retry=0
org.apache.hadoop.hbase.client.RetriesExhaustedException: Failed setting up proxy interface org.apache.hadoop.hbase.ipc.HRegionInterface to /127.0.0.1:60020 after attempts=1
    at org.apache.hadoop.hbase.ipc.HBaseRPC.waitForProxy(HBaseRPC.java:355)
    at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getHRegionConnection(HConnectionManager.java:957)
    at org.apache.hadoop.hbase.master.ServerManager.getServerConnection(ServerManager.java:606)
    at org.apache.hadoop.hbase.master.ServerManager.sendRegionOpen(ServerManager.java:541)
    at org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:901)
    at org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:730)
    at org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:710)
    at org.apache.hadoop.hbase.master.AssignmentManager$TimeoutMonitor.chore(AssignmentManager.java:1605)
    at org.apache.hadoop.hbase.Chore.run(Chore.java:66)
Caused by: java.net.ConnectException: Connection refused
    at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
    at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:567)
    at org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206)
    at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:408)
    at org.apache.hadoop.hbase.ipc.HBaseClient$Connection.setupIOstreams(HBaseClient.java:328)
    at org.apache.hadoop.hbase.ipc.HBaseClient.getConnection(HBaseClient.java:883)
    at org.apache.hadoop.hbase.ipc.HBaseClient.call(HBaseClient.java:750)
    at org.apache.hadoop.hbase.ipc.HBaseRPC$Invoker.invoke(HBaseRPC.java:257)
    at $Proxy6.getProtocolVersion(Unknown Source)
    at org.apache.hadoop.hbase.ipc.HBaseRPC.getProxy(HBaseRPC.java:419)
    at org.apache.hadoop.hbase.ipc.HBaseRPC.getProxy(HBaseRPC.java:393)
    at org.apache.hadoop.hbase.ipc.HBaseRPC.getProxy(HBaseRPC.java:444)
    at org.apache.hadoop.hbase.ipc.HBaseRPC.waitForProxy(HBaseRPC.java:349)
    ... 8 more
11/05/15 19:58:27 WARN master.AssignmentManager: Unable to find a viable location to assign region -ROOT-,,0.70236052

Answer 1

Fixed this issue for anyone else who finds this. Was a problem with the host file (/etc/hosts). Need to remove entries relating to 127.0.1.1 COMPNAME - just put a hash (#) in front of this line and then restart all hadoop and hbase services.

More on the solution here: http://blog.nemccarthy.me/?p=110