Hi,
But it is reading settings from hbase-site.xml. If it was not reading my
changes, the problem wouldn't have gotten fixed when I add ejabber to the
quroum right? After all, it is responding to changes I make in my xml file.
What else can be the issue here?
hari
On Mon, Nov 22, 2010 at 12:54 AM, Lars George <[email protected]> wrote:
> Hi Hari,
>
> You are missing the quorum setting. It seems the hbase-site.xml is missing
> from the classpath on the clients. Did you pack it into the jar?
>
> And yes, even one ZK server is fine in such a small cluster.
>
> You can see it is trying to connect to localhost which is the default if
> the site file is missing.
>
> Regards,
> Lars
>
> On Nov 21, 2010, at 19:22, Hari Sreekumar <[email protected]>
> wrote:
>
> > Hi,
> > Is it necessary that all RegionServers must also be part of the ZK
> > Quorum? I have a 4 node cluster, with node hadoop1 being master and
> hadoop2,
> > hadoop3 and ejabber being the slaves (Both in case of hadoop and for
> HBase).
> >
> > When I keep only 3 nodes in the zookeeper.quorum property:
> > <name>hbase.zookeeper.quorum</name>
> > <value>hadoop1,hadoop2,hadoop3</value>
> >
> > I get this exception for all tasks that run on ejabber(the 4th node):
> >
> > 2010-11-21 23:35:47,785 INFO org.apache.zookeeper.ClientCnxn: Attempting
> > connection to server localhost/127.0.0.1:2181
> > 2010-11-21 23:35:47,790 WARN org.apache.zookeeper.ClientCnxn: Exception
> > closing session 0x0 to sun.nio.ch.selectionkeyi...@7c2e1f1f
> > java.net.ConnectException: Connection refused
> > at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
> > at
> > sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:574)
> > at
> > org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:933)
> > 2010-11-21 23:35:47,791 WARN org.apache.zookeeper.ClientCnxn: Ignoring
> > exception during shutdown input
> > java.nio.channels.ClosedChannelException
> > at
> > sun.nio.ch.SocketChannelImpl.shutdownInput(SocketChannelImpl.java:638)
> > at sun.nio.ch.SocketAdaptor.shutdownInput(SocketAdaptor.java:360)
> > at
> > org.apache.zookeeper.ClientCnxn$SendThread.cleanup(ClientCnxn.java:999)
> > at
> > org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:970)
> > 2010-11-21 23:35:47,791 WARN org.apache.zookeeper.ClientCnxn: Ignoring
> > exception during shutdown output
> > java.nio.channels.ClosedChannelException
> > at
> > sun.nio.ch.SocketChannelImpl.shutdownOutput(SocketChannelImpl.java:649)
> > at sun.nio.ch.SocketAdaptor.shutdownOutput(SocketAdaptor.java:368)
> > at
> > org.apache.zookeeper.ClientCnxn$SendThread.cleanup(ClientCnxn.java:1004)
> > at
> > org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:970)
> > 2010-11-21 23:35:47,925 WARN
> > org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper: Failed to create
> /hbase
> > -- check quorum servers, currently=localhost:2181
> > org.apache.zookeeper.KeeperException$ConnectionLossException:
> > KeeperErrorCode = ConnectionLoss for /hbase
> > at
> > org.apache.zookeeper.KeeperException.create(KeeperException.java:90)
> > at
> > org.apache.zookeeper.KeeperException.create(KeeperException.java:42)
> > at org.apache.zookeeper.ZooKeeper.exists(ZooKeeper.java:780)
> > at org.apache.zookeeper.ZooKeeper.exists(ZooKeeper.java:808)
> > at
> >
> org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper.ensureExists(ZooKeeperWrapper.java:405)
> > at
> >
> org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper.ensureParentExists(ZooKeeperWrapper.java:432)
> > at
> >
> org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper.checkOutOfSafeMode(ZooKeeperWrapper.java:545)
> >
> > When I add ejabber also to the ZK quorum and restart HBase, I don't get
> this
> > exception. My understanding was that a small cluster like mine should
> only
> > need one ZK machine.
> >
> > Thanks,
> > Hari
>
