Hey Lars,
I have HQuorumPeer running on all nodes that I specify in my
hbase-site file. One thing I wanted to clarify.. what is the default value
of HBASE_MANAGES_ZK ? Because I have not explicitly set it to true in my
hbase-env.sh file.
thanks,
hari
On Mon, Nov 22, 2010 at 10:39 AM, Lars George <[email protected]> wrote:
> Hi Hari,
>
> On which of these for machines do you have a ZooKeeper daemon running as
> well?
>
> Lars
>
> On Mon, Nov 22, 2010 at 5:51 AM, Hari Sreekumar
> <[email protected]> wrote:
> > 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
> >>
> >
>
