Grokbase Groups HBase user April 2011
FAQ
Is there a procedure to decommission a region server?

If I just kill a region server process, the master tries to reconnect again
and again and the master logs looks like this


11/04/08 21:08:35 WARN util.FSUtils: Waited 2533953ms for lease recovery on
hdfs://
xxx.compute-1.amazonaws.com:8020/hbase/.logs/xxx.internal,60020,1302293217355/ip-1xx2-119.ec2.internal%3A60020.1302293256478:org.apache.hadoop.hdfs.protocol.AlreadyBeingCreatedException:
failed
to create file
/hbase/.logs/ip-xx.internal,60020,1302293217355/ip-10-dd9.ec2.internal%3A60020.1302293256478
for DFSClient_hb_m_ip-xx2.internal:60000_1302293244804 on client
10.17.197.48, because this file is already being created by NN_Recovery on
ad
at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.startFileInternal(FSNamesystem.java:1196)
at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.appendFile(FSNamesystem.java:1284)
at
org.apache.hadoop.hdfs.server.namenode.NameNode.append(NameNode.java:596)
at sun.reflect.GeneratedMethodAccessor18.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:557)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1416)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1412)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1115)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1410)


Viv

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  • Jean-Daniel Cryans at Apr 8, 2011 at 9:29 pm
    See https://issues.apache.org/jira/browse/HBASE-3071
    On Fri, Apr 8, 2011 at 2:22 PM, Vivek Krishna wrote:
    Is there a procedure to decommission a region server?

    If I just kill a region server process, the master tries to reconnect again
    and again and the master logs looks like this


    11/04/08 21:08:35 WARN util.FSUtils: Waited 2533953ms for lease recovery on
    hdfs://
    xxx.compute-1.amazonaws.com:8020/hbase/.logs/xxx.internal,60020,1302293217355/ip-1xx2-119.ec2.internal%3A60020.1302293256478:org.apache.hadoop.hdfs.protocol.AlreadyBeingCreatedException:
    failed
    to create file
    /hbase/.logs/ip-xx.internal,60020,1302293217355/ip-10-dd9.ec2.internal%3A60020.1302293256478
    for DFSClient_hb_m_ip-xx2.internal:60000_1302293244804 on client
    10.17.197.48, because this file is already being created by NN_Recovery on
    ad
    at
    org.apache.hadoop.hdfs.server.namenode.FSNamesystem.startFileInternal(FSNamesystem.java:1196)
    at
    org.apache.hadoop.hdfs.server.namenode.FSNamesystem.appendFile(FSNamesystem.java:1284)
    at
    org.apache.hadoop.hdfs.server.namenode.NameNode.append(NameNode.java:596)
    at sun.reflect.GeneratedMethodAccessor18.invoke(Unknown Source)
    at
    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:557)
    at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1416)
    at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1412)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:396)
    at
    org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1115)
    at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1410)


    Viv
  • Stack at Apr 9, 2011 at 5:34 am

    On Fri, Apr 8, 2011 at 2:22 PM, Vivek Krishna wrote:
    Is there a procedure to decommission a region server?
    See http://hbase.apache.org/book.html#decommission (Requires hbase 0.90.2).
    St.Ack

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categorieshbase, hadoop
postedApr 8, '11 at 9:22p
activeApr 9, '11 at 5:34a
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