Re: Backup Master is not started?

Thu, 04 Aug 2011 03:21:04 -0700 

Hi Jean,

            Thank you for your suggestions.................


            I am using the same configuration for the both active and backup 
masters. But the problem is not solved. The backup master is not take the 
master role. How can I solve this one?



Regards,


Shanmuganathan



---- On Wed, 03 Aug 2011 23:35:38 +0530 Jean-Daniel 
Cryans<[email protected]> wrote ---- 


Have them use the same configuration? 
 
J-D 
 
On Wed, Aug 3, 2011 at 7:17 AM, shanmuganathan.r 
<[email protected]> wrote: 
> Hi Jean, 
> 
>            The Problem is continued even the Active master is properly 
killed. How can we make the Active master and backup master  use the same 
zookeeper ensemble. 
> 
> Regards, 
> 
> Shanmuganathan 
> 
> 
> 
> ---- On Tue, 02 Aug 2011 22:42:10 +0530 Jean-Daniel 
Cryans<[email protected]> wrote ---- 
> 
> 
> Like it says, the backup master is waiting for the primary one to 
> create the znode as in it considers it's not even running yet. If your 
> primary node is indeed running correctly, it could mean that they 
> aren't using the same Zookeeper ensemble or root znode. 
> 
> Check that first. 
> 
> J-D 
> 
> On Tue, Aug 2, 2011 at 4:12 AM, shanmuganathan.r 
> <[email protected]> wrote: 
> > Hi All, 
> > 
> >      I have the problem in my HBase fully distributed mode with 
backup master . The HBase in the fully distributed mode is starting and working 
properly. The Active Master is working and My backup master is waiting for the 
active master termination. If I kill the active master process, the backup 
master don't come to active which remains in the waiting state. 
> > 
> > 
> >      I declared the backup master in the 
HBase/conf/Backup-masters file. 
> > 
> > 
> >      My backup master log is 
> > 2011-08-02 16:04:16,416 INFO org.apache.hadoop.hbase.metrics: 
MetricsString added: revision 
> > 2011-08-02 16:04:16,416 INFO org.apache.hadoop.hbase.metrics: 
MetricsString added: hdfsUser 
> > 2011-08-02 16:04:16,416 INFO org.apache.hadoop.hbase.metrics: 
MetricsString added: hdfsDate 
> > 2011-08-02 16:04:16,416 INFO org.apache.hadoop.hbase.metrics: 
MetricsString added: hdfsUrl 
> > 2011-08-02 16:04:16,416 INFO org.apache.hadoop.hbase.metrics: 
MetricsString added: date 
> > 2011-08-02 16:04:16,416 INFO org.apache.hadoop.hbase.metrics: 
MetricsString added: hdfsRevision 
> > 2011-08-02 16:04:16,416 INFO org.apache.hadoop.hbase.metrics: 
MetricsString added: user 
> > 2011-08-02 16:04:16,416 INFO org.apache.hadoop.hbase.metrics: 
MetricsString added: hdfsVersion 
> > 2011-08-02 16:04:16,416 INFO org.apache.hadoop.hbase.metrics: 
MetricsString added: url 
> > 2011-08-02 16:04:16,416 INFO org.apache.hadoop.hbase.metrics: 
MetricsString added: version 
> > 2011-08-02 16:04:16,416 INFO org.apache.hadoop.hbase.metrics: new 
MBeanInfo 
> > 2011-08-02 16:04:16,417 INFO org.apache.hadoop.hbase.metrics: new 
MBeanInfo 
> > 2011-08-02 16:04:16,417 INFO 
org.apache.hadoop.hbase.master.metrics.MasterMetrics: Initialized 
> > 2011-08-02 16:04:16,418 DEBUG 
org.apache.hadoop.hbase.master.HMaster: HMaster started in backup mode.  
Stalling until master znode is written. 
> > 2011-08-02 16:04:16,418 DEBUG 
org.apache.hadoop.hbase.master.HMaster: Waiting for master address ZNode to be 
written (Also watching cluster state node) 
> > 2011-08-02 16:07:16,418 DEBUG 
org.apache.hadoop.hbase.master.HMaster: Waiting for master address ZNode to be 
written (Also watching cluster state node) 
> > 2011-08-02 16:10:16,418 DEBUG 
org.apache.hadoop.hbase.master.HMaster: Waiting for master address ZNode to be 
written (Also watching cluster state node) 
> > 2011-08-02 16:13:16,418 DEBUG 
org.apache.hadoop.hbase.master.HMaster: Waiting for master address ZNode to be 
written (Also watching cluster state node) 
> > 
> > 
> > 
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 
> > 
> > 
> >      And the one of my region server log is 
> > 
> > 
> > 2011-08-02 16:21:45,977 DEBUG 
org.apache.hadoop.hbase.io.hfile.LruBlockCache: LRU Stats: total=958.41 KB, 
free=198.43 MB, max=199.36 MB, blocks=1, accesses=10, hits=9, hitRatio=89.99%%, 
cachingAccesses=10, cachingHits=9, cachingHitsRatio=89.99%%, evictions=0, 
evicted=0, evictedPerRun=NaN 
> > 2011-08-02 16:22:40,714 WARN 
org.apache.hadoop.hbase.regionserver.HRegionServer: Unable to connect to 
master. Retrying. Error was: 
> > java.net.ConnectException: Connection refused 
> >        at sun.nio.ch.SocketChannelImpl.checkConnect(Native 
Method) 
> >        at 
sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:592) 
> >        at 
org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206) 
> >        at 
org.apache.hadoop.net.NetUtils.connect(NetUtils.java:404) 
> >        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 $Proxy5.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) 
> >        at 
org.apache.hadoop.hbase.regionserver.HRegionServer.getMaster(HRegionServer.java:1445)
 
> >        at 
org.apache.hadoop.hbase.regionserver.HRegionServer.tryRegionServerReport(HRegionServer.java:737)
 
> >        at 
org.apache.hadoop.hbase.regionserver.HRegionServer.run(HRegionServer.java:586) 
> >        at java.lang.Thread.run(Thread.java:636) 
> > 
> > 
> > 
> > 
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 
> > 
> > 
> > 1. How can we solve this problem? 
> > 
> > 
> > 2. Is there any extra configuration needed for this backup master 
configuration in HBase? 
> > 
> > 
> >                                                      Thanks for 
your valuable suggestions ......! 
> > 
> > 
> > Regards, 
> > 
> > Shanmuganathan 
> > 
> > 
> > 
> > 
> 
> 
>

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