Yes this sounds like a zookeeper DNS error. I just ran into these type of issues a few months ago and wrote up my solutions to the 3 main hbase communication/setup errors I got.
See if this helps http://jayunit100.blogspot.com/2013/05/debugging-hbase-installation.html Also Make sure iptables are off etc.. On Aug 22, 2013, at 6:02 AM, Vamshi Krishna <[email protected]> wrote: > Hi I setup a hbase cluster of 2 machines. > > Master Machine (vamshi_RS) running both master & Regionserver > slave machine - Running only Region server. > > After i ran start-hbase.sh all the daemons are starting perfectly but after > some time Regionserver on slave machine is stopping. > > I analysed the region server log and below is the log content. > Some how the Region server machine is not able to communicate with the > zookeeper (I guess). Is that the reason..? > > Please look at my hbase-site.xml below (after log content), which is same > in both the machines and kindly let me know the solution for this issue. > > > 2013-08-22 14:03:25,023 INFO org.apache.zookeeper.ZooKeeper: Initiating > client connection, connectString=vamshi_RS:2181 sessionTimeout=180000 > watcher=regionserver:60020 > 2013-08-22 14:03:25,033 INFO > org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper: The identifier of > this process is 7426@vamshi > 2013-08-22 14:03:25,038 INFO org.apache.zookeeper.ClientCnxn: Opening > socket connection to server vamshi_RS/192.168.1.57:2181. Will not attempt > to authenticate using SASL (Unable to locate a login configuration) > 2013-08-22 14:04:28,171 WARN org.apache.zookeeper.ClientCnxn: Session 0x0 > for server null, unexpected error, closing socket connection and attempting > reconnect > java.net.ConnectException: Connection timed out > at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) > at > sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:599) > at > org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:350) > at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1068) > 2013-08-22 14:04:28,287 WARN > org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper: Possibly transient > ZooKeeper exception: > org.apache.zookeeper.KeeperException$ConnectionLossException: > KeeperErrorCode = ConnectionLoss for /hbase/master > 2013-08-22 14:04:28,287 INFO org.apache.hadoop.hbase.util.RetryCounter: > Sleeping 2000ms before retry #1... > 2013-08-22 14:04:29,282 INFO org.apache.zookeeper.ClientCnxn: Opening > socket connection to server vamshi_RS/192.168.1.57:2181. Will not attempt > to authenticate using SASL (Unable to locate a login configuration) > 2013-08-22 14:05:32,425 WARN org.apache.zookeeper.ClientCnxn: Session 0x0 > for server null, unexpected error, closing socket connection and attempting > reconnect > java.net.ConnectException: Connection timed out > at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) > at > sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:599) > at > org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:350) > at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1068) > 2013-08-22 14:05:32,526 WARN > org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper: Possibly transient > ZooKeeper exception: > org.apache.zookeeper.KeeperException$ConnectionLossException: > KeeperErrorCode = ConnectionLoss for /hbase/master > 2013-08-22 14:05:32,526 INFO org.apache.hadoop.hbase.util.RetryCounter: > Sleeping 4000ms before retry #2... > 2013-08-22 14:05:33,526 INFO org.apache.zookeeper.ClientCnxn: Opening > socket connection to server vamshi_RS/192.168.1.57:2181. Will not attempt > to authenticate using SASL (Unable to locate a login configuration) > 2013-08-22 14:06:36,617 WARN org.apache.zookeeper.ClientCnxn: Session 0x0 > for server null, unexpected error, closing socket connection and attempting > reconnect > java.net.ConnectException: Connection timed out > at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) > at > sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:599) > at > org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:350) > at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1068) > . > . > . > > > hbase-site.xml: > > <property> > <name>hbase.rootdir</name> > > <!--value>hdfs://vamshi:54310/home/biginfolabs/BILSftwrs/hbase-0.94.10/data/</value--> > <value>/home/biginfolabs/BILSftwrs/hbase-0.94.10/hbstmp/</value> > </property> > > <property> > <name>hbase.cluster.distributed</name> > <value>true</value> > </property> > <property> > <name>hbase.master</name> > <value>vamshi_RS</value> > </property> > <property> > <name>hbase.zookeeper.property.clientPort</name> > <value>2181</value> > </property> > > <property> > <name>hbase.hregion.max.filesize</name> > <value>50</value> > </property> > > <property> > <name>hbase.balancer.period</name> > <value>60000</value> > </property> > > <property> > <name>hbase.zookeeper.quorum</name> > <value>vamshi_RS</value> > </property> > <property> > <name>hbase.zookeeper.property.dataDir</name> > <value>/home/biginfolabs/BILSftwrs/hbase-0.94.10/zkptmp</value> > </property> > <property> > <name>hbase.client.scanner.caching</name> > <value>1000</value> > <description>Number of rows that will be fetched when calling next > </description> > </property> > <property> > <name>hbase.zookeeper.property.maxClientCnxns</name> > <value>1024</value> > </property> > > <property> > <name>hbase.coprocessor.user.region.classes</name> > <value>com.bil.coproc.ColumnAggregationEndpoint</value> > </property> > > -- > *Regards* > * > Vamshi Krishna > *
