It means the root region likely wasn't assigned, anything in the master about it?
J-D On Wed, Jan 13, 2010 at 11:43 AM, Adam Silberstein <silbe...@yahoo-inc.com> wrote: > I have version 0.20.2. The client requests hang. > And, I looked in the region server logs...here is the likely culprit: > > java.io.IOException: org.apache.zookeeper.KeeperException$NoNodeException: > KeeperErrorCode = NoNode for /hbase/root-region-server > at > org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper.readAddressOrThrow(ZooKee > perWrapper.java:332) > at > org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper.readAddress(ZooKeeperWrap > per.java:318) > at > org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper.readRootRegionLocation(Zo > oKeeperWrapper.java:231) > at > org.apache.hadoop.hbase.regionserver.HRegionServer.run(HRegionServer.java:44 > 2) > at java.lang.Thread.run(Thread.java:619) > Caused by: org.apache.zookeeper.KeeperException$NoNodeException: > KeeperErrorCode = NoNode for /hbase/root-region-server > at > org.apache.zookeeper.KeeperException.create(KeeperException.java:102) > at > org.apache.zookeeper.KeeperException.create(KeeperException.java:42) > at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:892) > at > org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper.readAddressOrThrow(ZooKee > perWrapper.java:328) > ... 4 more > java.io.IOException: org.apache.zookeeper.KeeperException$NoNodeException: > KeeperErrorCode = NoNode for /hbase/root-region-server > at > org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper.readAddressOrThrow(ZooKee > perWrapper.java:332) > at > org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper.readAddress(ZooKeeperWrap > per.java:318) > at > org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper.readRootRegionLocation(Zo > oKeeperWrapper.java:231) > at > org.apache.hadoop.hbase.regionserver.HRegionServer.run(HRegionServer.java:44 > 2) > at java.lang.Thread.run(Thread.java:619) > Caused by: org.apache.zookeeper.KeeperException$NoNodeException: > KeeperErrorCode = NoNode for /hbase/root-region-server > at > org.apache.zookeeper.KeeperException.create(KeeperException.java:102) > at > org.apache.zookeeper.KeeperException.create(KeeperException.java:42) > at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:892) > at > org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper.readAddressOrThrow(ZooKee > perWrapper.java:328) > ... 4 more > > Is there zk state on the region servers? Maybe when wiping the system, I > should have wiped something on them. > > Thanks, > Adam > > On 1/13/10 11:33 AM, "Jean-Daniel Cryans" <jdcry...@apache.org> wrote: > >> Those node exists are usually harmless, I would like the see what's on >> the HBase region server and master side. >> >> You say it cannot do any operation but you don't see exceptions >> client-side? It just hangs? Which version is it? >> >> Thx, >> >> J-D >> >> On Wed, Jan 13, 2010 at 11:25 AM, Adam Silberstein >> <silbe...@yahoo-inc.com> wrote: >>> Hi, >>> I set up a new Hbase cluster and am seeing an error I haven't seen before. >>> When I start up Hbase I have this NodeExists error in the zookeeper log: >>> >>> org.apache.zookeeper.KeeperException$NodeExistsException: KeeperErrorCode = >>> NodeExists >>> at >>> org.apache.zookeeper.server.PrepRequestProcessor.pRequest(PrepRequestProcess >>> or.java:245) >>> at >>> org.apache.zookeeper.server.PrepRequestProcessor.run(PrepRequestProcessor.ja >>> va:114) >>> 2010-01-13 11:10:47,503 WARN >>> org.apache.zookeeper.server.PrepRequestProcessor: Got exception when >>> processing sessionid:0x1262918396b0002 type:create cxid:0xc >>> zxid:0xfffffffffffffffe txntype:unknown n/a >>> org.apache.zookeeper.KeeperException$NodeExistsException: KeeperErrorCode = >>> NodeExists >>> at >>> org.apache.zookeeper.server.PrepRequestProcessor.pRequest(PrepRequestProcess >>> or.java:245) >>> at >>> org.apache.zookeeper.server.PrepRequestProcessor.run(PrepRequestProcessor.ja >>> va:114) >>> >>> I've read that may be harmless. But then when I run the java client, it >>> cannot do any operations. And I see a similar NodeExists error in the >>> zookeeper log. >>> >>> >>> 2010-01-13 11:11:24,661 INFO org.apache.zookeeper.server.NIOServerCnxn: >>> Connected to /203.104.21.210:36928 lastZxid 0 >>> 2010-01-13 11:11:24,661 INFO org.apache.zookeeper.server.NIOServerCnxn: >>> Creating new session 0x1262918396b0004 >>> 2010-01-13 11:11:24,664 INFO org.apache.zookeeper.server.NIOServerCnxn: >>> Finished init of 0x1262918396b0004 valid:true >>> 2010-01-13 11:11:24,973 WARN >>> org.apache.zookeeper.server.PrepRequestProcessor: Got exception when >>> processing sessionid:0x1262918396b0004 type:create cxid:0x2 >>> zxid:0xfffffffffffffffe txntype:unknown n/a >>> org.apache.zookeeper.KeeperException$NodeExistsException: KeeperErrorCode = >>> NodeExists >>> at >>> org.apache.zookeeper.server.PrepRequestProcessor.pRequest(PrepRequestProcess >>> or.java:245) >>> at >>> org.apache.zookeeper.server.PrepRequestProcessor.run(PrepRequestProcessor.ja >>> va:114) >>> 2010-01-13 11:11:33,088 WARN org.apache.zookeeper.server.NIOServerCnxn: >>> Exception causing close of session 0x1262918396b0004 due to >>> java.io.IOException: Read error >>> 2010-01-13 11:11:33,089 INFO org.apache.zookeeper.server.NIOServerCnxn: >>> closing session:0x1262918396b0004 NIOServerCnxn: >>> java.nio.channels.SocketChannel[connected local=/203.104.21.210:2181 >>> remote=/203.104.21.210:36928] >>> 2010-01-13 11:11:42,709 INFO org.apache.zookeeper.server.NIOServerCnxn: >>> Connected to /203.104.21.212:54837 lastZxid 0 >>> 2010-01-13 11:11:42,709 INFO org.apache.zookeeper.server.NIOServerCnxn: >>> Creating new session 0x1262918396b0005 >>> 2010-01-13 11:11:42,711 INFO org.apache.zookeeper.server.NIOServerCnxn: >>> Finished init of 0x1262918396b0005 valid:true >>> 2010-01-13 11:11:42,711 WARN >>> org.apache.zookeeper.server.PrepRequestProcessor: Got exception when >>> processing sessionid:0x1262918396b0005 type:create cxid:0x1 >>> zxid:0xfffffffffffffffe txntype:unknown n/a >>> org.apache.zookeeper.KeeperException$NodeExistsException: KeeperErrorCode = >>> NodeExists >>> at >>> org.apache.zookeeper.server.PrepRequestProcessor.pRequest(PrepRequestProcess >>> or.java:245) >>> at >>> org.apache.zookeeper.server.PrepRequestProcessor.run(PrepRequestProcessor.ja >>> va:114) >>> 2010-01-13 11:12:06,002 INFO org.apache.zookeeper.server.SessionTrackerImpl: >>> Expiring session 0x1262918396b0004 >>> 2010-01-13 11:12:06,002 INFO org.apache.zookeeper.server.ZooKeeperServer: >>> Expiring session 0x1262918396b0004 >>> 2010-01-13 11:12:06,002 INFO >>> org.apache.zookeeper.server.PrepRequestProcessor: Processed session >>> termination request for id: 0x1262918396b0004 >>> >>> I've tried wiping the whole setup, including the zookeeper files that Hbase >>> puts in /tmp and formatting HDFS. But I get the same problem again. I'm >>> not seeing any exceptions on the client-side. >>> >>> Thanks, >>> Adam >>> >>> > >
