Hi Hari, Are you starting them yourself or have HBase start them for you implicitly?
Lars On Nov 22, 2010, at 6:19, Hari Sreekumar <[email protected]> wrote: > 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 >>>> >>> >>
