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 <hsreeku...@clickable.com> 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 <lars.geo...@gmail.com> 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 <hsreeku...@clickable.com> >> 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 >> >
