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From Jean-Daniel Cryans <jdcry...@apache.org>
Subject Re: Re: Problems with Hbase Restart
Date Thu, 14 Jan 2010 19:28:22 GMT
I fixed it in 0.20.3

J-D

2010/1/14 stack <stack@duboce.net>:
> Its an exception thrown when you have logging set to DEBUG. Its just an
> emission to give a sense of where zk setup is during startup.  The issue of
> nonode for the master is soon resolved after master succeeds writing its
> address into zk and startup proceeds.
>
> You are not the first to finger this exception as possible issue.  Its
> confusing.  Let us try and change this one at least before we cut the new
> 0.20.3RC.
>
> St.Ack
>
> 2010/1/14 王仲远 <zhywangchina@163.com>
>
>> Hi, J-D,
>>   Thank you for your response and suggestion. I found the problem was
>> caused by /etc/hosts in 10.37.248. In the file, the first line is:
>> 127.0.0.1       WAMDM1  localhost.localdomain   localhost
>> and We used the hostname in our regionservers file.
>>
>> Then I had corrected the hosts file and solved the problems.
>>
>> However, when I restarted the hbase, I get some exceptions as follow:
>> java.io.IOException: org.apache.zookeeper.KeeperException$NoNodeException:
>> KeeperErrorCode = NoNode for /hbase/master
>>        at
>> org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper.readAddressOrThrow(ZooKeeperWrapper.java:332)
>>        at
>> org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper.readAddress(ZooKeeperWrapper.java:318)
>>        at
>> org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper.readMasterAddress(ZooKeeperWrapper.java:250)
>>        at
>> org.apache.hadoop.hbase.master.ZKMasterAddressWatcher.waitForMasterAddressAvailability(ZKMasterAddressWatcher.java:82)
>>        at
>> org.apache.hadoop.hbase.master.HMaster.writeAddressToZooKeeper(HMaster.java:267)
>>        at org.apache.hadoop.hbase.master.HMaster.<init>(HMaster.java:254)
>>        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
>> Method)
>>        at
>> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
>>        at
>> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
>>
>> But it seemed that Hbase still worked well.  What's the matter with this
>> exception?
>>
>> Any suggestion? Thank you~~
>>
>>
>> Zhongyuan
>> 2010-01-15
>>
>>
>> -------------------------------------------------------------
>> From: Jean-Daniel Cryans
>> Sent: 2010-01-14 01:40:33
>> To: hbase-user
>> CC:
>> Subject: Re: Problems with Hbase Restart
>>
>> It seems your master's region server reported itself as 127.0.0.1
>> Then there's something wrong with 10.37.17.248, you should check this
>> machine's region server log.
>> J-D
>> 2010/1/13 王仲远 <zhywangchina@163.com>:
>> > I have two problems when I use hbase 0.20.2.
>> >
>> > I used several machines to make a cluster and deployed hadoop and hbase
>> on them. I followed the "Getting Started" and installed Hbase 0.20.2. I
>> could start hbase sucessfully and created table and inserted data.
>> >
>> > However, when I accessed the master page:
>> http://10.37.17.252:60010/master.jsp , I found the first problem: the
>> master node also appear on Region Servers and appear twice. But I didn't set
>> the master node as regionserver in conf/regionservers:
>> > Region Servers
>> > Address Start Code Load
>> > 127.0.0.1:60030 1263383321075 requests=0, regions=0, usedHeap=0,
>> maxHeap=0
>> > 127.0.0.1:60030 1263383321096 requests=0, regions=0, usedHeap=0,
>> maxHeap=0
>> > WAMDM1.ruc.edu.cn:60030 1263383350174 requests=0, regions=0,
>> usedHeap=24, maxHeap=991
>> > WAMDM2.ruc.edu.cn:60030 1263383320980 requests=0, regions=1,
>> usedHeap=32, maxHeap=991
>> > WAMDM3.ruc.edu.cn:60030 1263383320985 requests=0, regions=1,
>> usedHeap=33, maxHeap=991
>> > WAMDM4.ruc.edu.cn:60030 1263383322246 requests=0, regions=0,
>> usedHeap=33, maxHeap=991
>> >
>> > However, the hbase seemed to work fine. But When I try to restart the
>> hbase, I found the second problem: I run bin/stop-hbase.sh and then run bin/
>> start-hbase.sh. But at this time, the hbase go down. When I tried to access
>> the master page: http://10.37.17.252:60010/master.jsp , I got the
>> following error message:
>> >
>> > HTTP ERROR: 500
>> > Trying to contact region server null for region , row '', but failed
>> after 3 attempts.
>> > Exceptions:
>> > org.apache.hadoop.hbase.client.RetriesExhaustedException: Failed setting
>> up proxy to /10.37.17.248:60020 after attempts=1
>> > org.apache.hadoop.hbase.client.RetriesExhaustedException: Failed setting
>> up proxy to /10.37.17.248:60020 after attempts=1
>> > org.apache.hadoop.hbase.client.RetriesExhaustedException: Failed setting
>> up proxy to /10.37.17.248:60020 after attempts=1
>> >
>> > RequestURI=/master.jsp
>> >
>> > Caused by:
>> > org.apache.hadoop.hbase.client.RetriesExhaustedException: Trying to
>> contact region server null for region , row '', but failed after 3 attempts.
>> > Exceptions:
>> > org.apache.hadoop.hbase.client.RetriesExhaustedException: Failed setting
>> up proxy to /10.37.17.248:60020 after attempts=1
>> > org.apache.hadoop.hbase.client.RetriesExhaustedException: Failed setting
>> up proxy to /10.37.17.248:60020 after attempts=1
>> > org.apache.hadoop.hbase.client.RetriesExhaustedException: Failed setting
>> up proxy to /10.37.17.248:60020 after attempts=1
>> >
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getRegionServerWithRetries(HConnectionManager.java:1002)
>> >        at
>> org.apache.hadoop.hbase.client.MetaScanner.metaScan(MetaScanner.java:55)
>> >        at
>> org.apache.hadoop.hbase.client.MetaScanner.metaScan(MetaScanner.java:28)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.listTables(HConnectionManager.java:433)
>> >        at
>> org.apache.hadoop.hbase.client.HBaseAdmin.listTables(HBaseAdmin.java:127)
>> >        at
>> org.apache.hadoop.hbase.generated.master.master_jsp._jspService(master_jsp.java:125)
>> >        at
>> org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
>> >        at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
>> >        at
>> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:502)
>> >        at
>> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:363)
>> >        at
>> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
>> >        at
>> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
>> >        at
>> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766)
>> >        at
>> org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:417)
>> >        at
>> org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
>> >        at
>> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
>> >        at org.mortbay.jetty.Server.handle(Server.java:324)
>> >        at
>> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:534)
>> >        at
>> org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:864)
>> >        at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:533)
>> >        at
>> org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:207)
>> >        at
>> org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:403)
>> >        at
>> org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
>> >        at
>> org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:522)
>> >
>> > Powered by Jetty://
>> >
>> >
>> > The error messages in the master log:
>> > 2010-01-13 18:34:04,424 DEBUG
>> org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper: Read ZNode
>> /hbase/root-region-server got 10.37.17.248:60020
>> > 2010-01-13 18:34:04,425 INFO org.apache.hadoop.ipc.HbaseRPC: Server at /
>> 10.37.17.248:60020 could not be reached after 1 tries, giving up.
>> > 2010-01-13 18:34:04,425 DEBUG
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers: Root region
>> location changed. Sleeping.
>> > 2010-01-13 18:34:06,425 DEBUG
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers: Wake. Retry
>> finding root region.
>> > 2010-01-13 18:34:06,429 DEBUG
>> org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper: Read ZNode
>> /hbase/root-region-server got 10.37.17.248:60020
>> > 2010-01-13 18:34:06,430 INFO org.apache.hadoop.ipc.HbaseRPC: Server at /
>> 10.37.17.248:60020 could not be reached after 1 tries, giving up.
>> > 2010-01-13 18:34:06,430 DEBUG
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers: Root region
>> location changed. Sleeping.
>> > 2010-01-13 18:34:08,430 DEBUG
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers: Wake. Retry
>> finding root region.
>> > 2010-01-13 18:34:08,434 DEBUG
>> org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper: Read ZNode
>> /hbase/root-region-server got 10.37.17.248:60020
>> > 2010-01-13 18:34:08,435 INFO org.apache.hadoop.ipc.HbaseRPC: Server at /
>> 10.37.17.248:60020 could not be reached after 1 tries, giving up.
>> > 2010-01-13 18:34:08,435 DEBUG
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers:
>> locateRegionInMeta attempt 0 of 3 failed; retrying after sleep of 2000
>> > org.apache.hadoop.hbase.client.RetriesExhaustedException: Failed setting
>> up proxy to /10.37.17.248:60020 after attempts=1
>> >        at
>> org.apache.hadoop.hbase.ipc.HBaseRPC.waitForProxy(HBaseRPC.java:424)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getHRegionConnection(HConnectionManager.java:865)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getHRegionConnection(HConnectionManager.java:881)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.locateRootRegion(HConnectionManager.java:936)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.locateRegion(HConnectionManager.java:581)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.locateRegion(HConnectionManager.java:557)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.locateRegionInMeta(HConnectionManager.java:631)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.locateRegion(HConnectionManager.java:590)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.locateRegion(HConnectionManager.java:557)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getRegionLocation(HConnectionManager.java:407)
>> >        at
>> org.apache.hadoop.hbase.client.ServerCallable.instantiateServer(ServerCallable.java:57)
>> >        at
>> org.apache.hadoop.hbase.client.ScannerCallable.instantiateServer(ScannerCallable.java:62)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getRegionServerWithRetries(HConnectionManager.java:988)
>> >        at
>> org.apache.hadoop.hbase.client.MetaScanner.metaScan(MetaScanner.java:55)
>> >        at
>> org.apache.hadoop.hbase.client.MetaScanner.metaScan(MetaScanner.java:28)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.listTables(HConnectionManager.java:433)
>> >        at
>> org.apache.hadoop.hbase.client.HBaseAdmin.listTables(HBaseAdmin.java:127)
>> >        at
>> org.apache.hadoop.hbase.generated.master.master_jsp._jspService(master_jsp.java:125)
>> >        at
>> org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
>> >        at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
>> >        at
>> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:502)
>> >        at
>> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:363)
>> >        at
>> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
>> >        at
>> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
>> >        at
>> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766)
>> >        at
>> org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:417)
>> >        at
>> org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
>> >        at
>> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
>> >        at org.mortbay.jetty.Server.handle(Server.java:324)
>> >        at
>> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:534)
>> >        at
>> org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:864)
>> >        at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:533)
>> >        at
>> org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:207)
>> >        at
>> org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:403)
>> >        at
>> org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
>> >        at
>> org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:522)
>> > 2010-01-13 18:34:08,451 DEBUG
>> org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper: Read ZNode
>> /hbase/root-region-server got 10.37.17.248:60020
>> > 2010-01-13 18:34:08,451 INFO org.apache.hadoop.ipc.HbaseRPC: Server at /
>> 10.37.17.248:60020 could not be reached after 1 tries, giving up.
>> > 2010-01-13 18:34:08,451 DEBUG
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers: Root region
>> location changed. Sleeping.
>> > 2010-01-13 18:34:10,451 DEBUG
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers: Wake. Retry
>> finding root region.
>> > 2010-01-13 18:34:10,456 DEBUG
>> org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper: Read ZNode
>> /hbase/root-region-server got 10.37.17.248:60020
>> > 2010-01-13 18:34:10,465 INFO org.apache.hadoop.ipc.HbaseRPC: Server at /
>> 10.37.17.248:60020 could not be reached after 1 tries, giving up.
>> > 2010-01-13 18:34:10,465 DEBUG
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers: Root region
>> location changed. Sleeping.
>> > 2010-01-13 18:34:12,465 DEBUG
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers: Wake. Retry
>> finding root region.
>> > 2010-01-13 18:34:12,469 DEBUG
>> org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper: Read ZNode
>> /hbase/root-region-server got 10.37.17.248:60020
>> > 2010-01-13 18:34:12,470 INFO org.apache.hadoop.ipc.HbaseRPC: Server at /
>> 10.37.17.248:60020 could not be reached after 1 tries, giving up.
>> > 2010-01-13 18:34:14,474 DEBUG
>> org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper: Read ZNode
>> /hbase/root-region-server got 10.37.17.248:60020
>> > 2010-01-13 18:34:14,475 INFO org.apache.hadoop.ipc.HbaseRPC: Server at /
>> 10.37.17.248:60020 could not be reached after 1 tries, giving up.
>> > 2010-01-13 18:34:14,475 DEBUG
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers: Root region
>> location changed. Sleeping.
>> > 2010-01-13 18:34:16,475 DEBUG
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers: Wake. Retry
>> finding root region.
>> > 2010-01-13 18:34:16,480 DEBUG
>> org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper: Read ZNode
>> /hbase/root-region-server got 10.37.17.248:60020
>> > 2010-01-13 18:34:16,480 INFO org.apache.hadoop.ipc.HbaseRPC: Server at /
>> 10.37.17.248:60020 could not be reached after 1 tries, giving up.
>> > 2010-01-13 18:34:16,480 DEBUG
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers: Root region
>> location changed. Sleeping.
>> > 2010-01-13 18:34:18,480 DEBUG
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers: Wake. Retry
>> finding root region.
>> > 2010-01-13 18:34:18,485 DEBUG
>> org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper: Read ZNode
>> /hbase/root-region-server got 10.37.17.248:60020
>> > 2010-01-13 18:34:18,486 INFO org.apache.hadoop.ipc.HbaseRPC: Server at /
>> 10.37.17.248:60020 could not be reached after 1 tries, giving up.
>> > 2010-01-13 18:34:18,486 DEBUG
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers:
>> locateRegionInMeta attempt 0 of 3 failed; retrying after sleep of 2000
>> > org.apache.hadoop.hbase.client.RetriesExhaustedException: Failed setting
>> up proxy to /10.37.17.248:60020 after attempts=1
>> >        at
>> org.apache.hadoop.hbase.ipc.HBaseRPC.waitForProxy(HBaseRPC.java:424)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getHRegionConnection(HConnectionManager.java:865)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getHRegionConnection(HConnectionManager.java:881)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.locateRootRegion(HConnectionManager.java:936)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.locateRegion(HConnectionManager.java:581)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.locateRegion(HConnectionManager.java:557)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.locateRegionInMeta(HConnectionManager.java:631)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.locateRegion(HConnectionManager.java:590)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.relocateRegion(HConnectionManager.java:563)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getRegionLocation(HConnectionManager.java:407)
>> >        at
>> org.apache.hadoop.hbase.client.ServerCallable.instantiateServer(ServerCallable.java:57)
>> >        at
>> org.apache.hadoop.hbase.client.ScannerCallable.instantiateServer(ScannerCallable.java:62)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getRegionServerWithRetries(HConnectionManager.java:988)
>> >        at
>> org.apache.hadoop.hbase.client.MetaScanner.metaScan(MetaScanner.java:55)
>> >        at
>> org.apache.hadoop.hbase.client.MetaScanner.metaScan(MetaScanner.java:28)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.listTables(HConnectionManager.java:433)
>> >        at
>> org.apache.hadoop.hbase.client.HBaseAdmin.listTables(HBaseAdmin.java:127)
>> >        at
>> org.apache.hadoop.hbase.generated.master.master_jsp._jspService(master_jsp.java:125)
>> >        at
>> org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
>> >        at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
>> >        at
>> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:502)
>> >        at
>> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:363)
>> >        at
>> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
>> >        at
>> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
>> >        at
>> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766)
>> >        at
>> org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:417)
>> >        at
>> org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
>> >        at
>> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
>> >        at org.mortbay.jetty.Server.handle(Server.java:324)
>> >        at
>> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:534)
>> >        at
>> org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:864)
>> >        at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:533)
>> >        at
>> org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:207)
>> >        at
>> org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:403)
>> >        at
>> org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
>> >        at
>> org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:522)
>> > 2010-01-13 18:34:18,500 DEBUG
>> org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper: Read ZNode
>> /hbase/root-region-server got 10.37.17.248:60020
>> > 2010-01-13 18:34:18,501 INFO org.apache.hadoop.ipc.HbaseRPC: Server at /
>> 10.37.17.248:60020 could not be reached after 1 tries, giving up.
>> > 2010-01-13 18:34:18,501 DEBUG
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers: Root region
>> location changed. Sleeping.
>> > 2010-01-13 18:34:20,501 DEBUG
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers: Wake. Retry
>> finding root region.
>> > 2010-01-13 18:34:20,506 DEBUG
>> org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper: Read ZNode
>> /hbase/root-region-server got 10.37.17.248:60020
>> > 2010-01-13 18:34:20,506 INFO org.apache.hadoop.ipc.HbaseRPC: Server at /
>> 10.37.17.248:60020 could not be reached after 1 tries, giving up.
>> > 2010-01-13 18:34:20,506 DEBUG
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers: Root region
>> location changed. Sleeping.
>> > 2010-01-13 18:34:22,507 DEBUG
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers: Wake. Retry
>> finding root region.
>> > 2010-01-13 18:34:22,511 DEBUG
>> org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper: Read ZNode
>> /hbase/root-region-server got 10.37.17.248:60020
>> > 2010-01-13 18:34:22,511 INFO org.apache.hadoop.ipc.HbaseRPC: Server at /
>> 10.37.17.248:60020 could not be reached after 1 tries, giving up.
>> > 2010-01-13 18:34:24,516 DEBUG
>> org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper: Read ZNode
>> /hbase/root-region-server got 10.37.17.248:60020
>> > 2010-01-13 18:34:24,516 INFO org.apache.hadoop.ipc.HbaseRPC: Server at /
>> 10.37.17.248:60020 could not be reached after 1 tries, giving up.
>> > 2010-01-13 18:34:24,516 DEBUG
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers: Root region
>> location changed. Sleeping.
>> > 2010-01-13 18:34:26,517 DEBUG
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers: Wake. Retry
>> finding root region.
>> > 2010-01-13 18:34:26,521 DEBUG
>> org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper: Read ZNode
>> /hbase/root-region-server got 10.37.17.248:60020
>> > 2010-01-13 18:34:26,522 INFO org.apache.hadoop.ipc.HbaseRPC: Server at /
>> 10.37.17.248:60020 could not be reached after 1 tries, giving up.
>> > 2010-01-13 18:34:26,522 DEBUG
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers: Root region
>> location changed. Sleeping.
>> > 2010-01-13 18:34:28,522 DEBUG
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers: Wake. Retry
>> finding root region.
>> > 2010-01-13 18:34:28,526 DEBUG
>> org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper: Read ZNode
>> /hbase/root-region-server got 10.37.17.248:60020
>> > 2010-01-13 18:34:28,527 INFO org.apache.hadoop.ipc.HbaseRPC: Server at /
>> 10.37.17.248:60020 could not be reached after 1 tries, giving up.
>> > 2010-01-13 18:34:28,527 DEBUG
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers:
>> locateRegionInMeta attempt 0 of 3 failed; retrying after sleep of 2000
>> > org.apache.hadoop.hbase.client.RetriesExhaustedException: Failed setting
>> up proxy to /10.37.17.248:60020 after attempts=1
>> >        at
>> org.apache.hadoop.hbase.ipc.HBaseRPC.waitForProxy(HBaseRPC.java:424)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getHRegionConnection(HConnectionManager.java:865)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getHRegionConnection(HConnectionManager.java:881)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.locateRootRegion(HConnectionManager.java:936)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.locateRegion(HConnectionManager.java:581)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.locateRegion(HConnectionManager.java:557)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.locateRegionInMeta(HConnectionManager.java:631)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.locateRegion(HConnectionManager.java:590)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.relocateRegion(HConnectionManager.java:563)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getRegionLocation(HConnectionManager.java:407)
>> >        at
>> org.apache.hadoop.hbase.client.ServerCallable.instantiateServer(ServerCallable.java:57)
>> >        at
>> org.apache.hadoop.hbase.client.ScannerCallable.instantiateServer(ScannerCallable.java:62)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getRegionServerWithRetries(HConnectionManager.java:988)
>> >        at
>> org.apache.hadoop.hbase.client.MetaScanner.metaScan(MetaScanner.java:55)
>> >        at
>> org.apache.hadoop.hbase.client.MetaScanner.metaScan(MetaScanner.java:28)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.listTables(HConnectionManager.java:433)
>> >        at
>> org.apache.hadoop.hbase.client.HBaseAdmin.listTables(HBaseAdmin.java:127)
>> >        at
>> org.apache.hadoop.hbase.generated.master.master_jsp._jspService(master_jsp.java:125)
>> >        at
>> org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
>> >        at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
>> >        at
>> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:502)
>> >        at
>> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:363)
>> >        at
>> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
>> >        at
>> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
>> >        at
>> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766)
>> >        at
>> org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:417)
>> >        at
>> org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
>> >        at
>> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
>> >        at org.mortbay.jetty.Server.handle(Server.java:324)
>> >        at
>> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:534)
>> >        at
>> org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:864)
>> >        at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:533)
>> >        at
>> org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:207)
>> >        at
>> org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:403)
>> >        at
>> org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
>> >        at
>> org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:522)
>> > 2010-01-13 18:34:28,547 DEBUG
>> org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper: Read ZNode
>> /hbase/root-region-server got 10.37.17.248:60020
>> > 2010-01-13 18:34:28,547 INFO org.apache.hadoop.ipc.HbaseRPC: Server at /
>> 10.37.17.248:60020 could not be reached after 1 tries, giving up.
>> > 2010-01-13 18:34:28,547 DEBUG
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers: Root region
>> location changed. Sleeping.
>> > 2010-01-13 18:34:30,547 DEBUG
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers: Wake. Retry
>> finding root region.
>> > 2010-01-13 18:34:30,552 DEBUG
>> org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper: Read ZNode
>> /hbase/root-region-server got 10.37.17.248:60020
>> > 2010-01-13 18:34:30,552 INFO org.apache.hadoop.ipc.HbaseRPC: Server at /
>> 10.37.17.248:60020 could not be reached after 1 tries, giving up.
>> > 2010-01-13 18:34:30,552 DEBUG
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers: Root region
>> location changed. Sleeping.
>> > 2010-01-13 18:34:31,575 INFO
>> org.apache.hadoop.hbase.master.ServerManager: 5 region servers, 0 dead,
>> average load 0.16666666666666666
>> > 2010-01-13 18:34:32,552 DEBUG
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers: Wake. Retry
>> finding root region.
>> > 2010-01-13 18:34:32,557 DEBUG
>> org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper: Read ZNode
>> /hbase/root-region-server got 10.37.17.248:60020
>> > 2010-01-13 18:34:32,558 INFO org.apache.hadoop.ipc.HbaseRPC: Server at /
>> 10.37.17.248:60020 could not be reached after 1 tries, giving up.
>> > 2010-01-13 18:34:32,740 INFO org.apache.hadoop.hbase.master.BaseScanner:
>> RegionManager.rootScanner scanning meta region {server: 10.37.17.248:60020,
>> regionname: -ROOT-,,0, startKey: <>}
>> > 2010-01-13 18:34:32,741 INFO org.apache.hadoop.hbase.master.BaseScanner:
>> All 0 .META. region(s) scanned
>> > 2010-01-13 18:34:32,741 INFO org.apache.hadoop.ipc.HbaseRPC: Server at /
>> 10.37.17.248:60020 could not be reached after 1 tries, giving up.
>> > 2010-01-13 18:34:32,741 WARN org.apache.hadoop.hbase.master.BaseScanner:
>> Scan ROOT region
>> > org.apache.hadoop.hbase.client.RetriesExhaustedException: Failed setting
>> up proxy to /10.37.17.248:60020 after attempts=1
>> >        at
>> org.apache.hadoop.hbase.ipc.HBaseRPC.waitForProxy(HBaseRPC.java:424)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getHRegionConnection(HConnectionManager.java:865)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getHRegionConnection(HConnectionManager.java:881)
>> >        at
>> org.apache.hadoop.hbase.master.BaseScanner.scanRegion(BaseScanner.java:156)
>> >        at
>> org.apache.hadoop.hbase.master.RootScanner.scanRoot(RootScanner.java:54)
>> >        at
>> org.apache.hadoop.hbase.master.RootScanner.maintenanceScan(RootScanner.java:79)
>> >        at
>> org.apache.hadoop.hbase.master.BaseScanner.chore(BaseScanner.java:136)
>> >        at org.apache.hadoop.hbase.Chore.run(Chore.java:68)
>> > 2010-01-13 18:35:31,575 INFO
>> org.apache.hadoop.hbase.master.ServerManager: 5 region servers, 0 dead,
>> average load 0.16666666666666666
>> > 2010-01-13 18:35:32,740 INFO org.apache.hadoop.hbase.master.BaseScanner:
>> RegionManager.rootScanner scanning meta region {server: 10.37.17.248:60020,
>> regionname: -ROOT-,,0, startKey: <>}
>> > 2010-01-13 18:35:32,741 INFO org.apache.hadoop.ipc.HbaseRPC: Server at /
>> 10.37.17.248:60020 could not be reached after 1 tries, giving up.
>> > 2010-01-13 18:35:32,741 WARN org.apache.hadoop.hbase.master.BaseScanner:
>> Scan ROOT region
>> > org.apache.hadoop.hbase.client.RetriesExhaustedException: Failed setting
>> up proxy to /10.37.17.248:60020 after attempts=1
>> >        at
>> org.apache.hadoop.hbase.ipc.HBaseRPC.waitForProxy(HBaseRPC.java:424)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getHRegionConnection(HConnectionManager.java:865)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getHRegionConnection(HConnectionManager.java:881)
>> >        at
>> org.apache.hadoop.hbase.master.BaseScanner.scanRegion(BaseScanner.java:156)
>> >        at
>> org.apache.hadoop.hbase.master.RootScanner.scanRoot(RootScanner.java:54)
>> >        at
>> org.apache.hadoop.hbase.master.RootScanner.maintenanceScan(RootScanner.java:79)
>> >        at
>> org.apache.hadoop.hbase.master.BaseScanner.chore(BaseScanner.java:136)
>> >        at org.apache.hadoop.hbase.Chore.run(Chore.java:68)
>> > 2010-01-13 18:35:32,742 INFO org.apache.hadoop.hbase.master.BaseScanner:
>> All 0 .META. region(s) scanned
>> > 2010-01-13 18:36:31,575 INFO
>> org.apache.hadoop.hbase.master.ServerManager: 5 region servers, 0 dead,
>> average load 0.16666666666666666
>> > 2010-01-13 18:36:32,740 INFO org.apache.hadoop.hbase.master.BaseScanner:
>> RegionManager.rootScanner scanning meta region {server: 10.37.17.248:60020,
>> regionname: -ROOT-,,0, startKey: <>}
>> > 2010-01-13 18:36:32,741 INFO org.apache.hadoop.ipc.HbaseRPC: Server at /
>> 10.37.17.248:60020 could not be reached after 1 tries, giving up.
>> > 2010-01-13 18:36:32,741 WARN org.apache.hadoop.hbase.master.BaseScanner:
>> Scan ROOT region
>> > org.apache.hadoop.hbase.client.RetriesExhaustedException: Failed setting
>> up proxy to /10.37.17.248:60020 after attempts=1
>> >        at
>> org.apache.hadoop.hbase.ipc.HBaseRPC.waitForProxy(HBaseRPC.java:424)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getHRegionConnection(HConnectionManager.java:865)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getHRegionConnection(HConnectionManager.java:881)
>> >        at
>> org.apache.hadoop.hbase.master.BaseScanner.scanRegion(BaseScanner.java:156)
>> >        at
>> org.apache.hadoop.hbase.master.RootScanner.scanRoot(RootScanner.java:54)
>> >        at
>> org.apache.hadoop.hbase.master.RootScanner.maintenanceScan(RootScanner.java:79)
>> >        at
>> org.apache.hadoop.hbase.master.BaseScanner.chore(BaseScanner.java:136)
>> >        at org.apache.hadoop.hbase.Chore.run(Chore.java:68)
>> > 2010-01-13 18:36:32,742 INFO org.apache.hadoop.hbase.master.BaseScanner:
>> All 0 .META. region(s) scanned
>> > 2010-01-13 18:37:31,575 INFO
>> org.apache.hadoop.hbase.master.ServerManager: 5 region servers, 0 dead,
>> average load 0.16666666666666666
>> > 2010-01-13 18:37:32,741 INFO org.apache.hadoop.hbase.master.BaseScanner:
>> RegionManager.rootScanner scanning meta region {server: 10.37.17.248:60020,
>> regionname: -ROOT-,,0, startKey: <>}
>> > 2010-01-13 18:37:32,741 INFO org.apache.hadoop.ipc.HbaseRPC: Server at /
>> 10.37.17.248:60020 could not be reached after 1 tries, giving up.
>> > 2010-01-13 18:37:32,741 WARN org.apache.hadoop.hbase.master.BaseScanner:
>> Scan ROOT region
>> > org.apache.hadoop.hbase.client.RetriesExhaustedException: Failed setting
>> up proxy to /10.37.17.248:60020 after attempts=1
>> >        at
>> org.apache.hadoop.hbase.ipc.HBaseRPC.waitForProxy(HBaseRPC.java:424)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getHRegionConnection(HConnectionManager.java:865)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getHRegionConnection(HConnectionManager.java:881)
>> >        at
>> org.apache.hadoop.hbase.master.BaseScanner.scanRegion(BaseScanner.java:156)
>> >        at
>> org.apache.hadoop.hbase.master.RootScanner.scanRoot(RootScanner.java:54)
>> >        at
>> org.apache.hadoop.hbase.master.RootScanner.maintenanceScan(RootScanner.java:79)
>> >        at
>> org.apache.hadoop.hbase.master.BaseScanner.chore(BaseScanner.java:136)
>> >        at org.apache.hadoop.hbase.Chore.run(Chore.java:68)
>> > 2010-01-13 18:37:32,742 INFO org.apache.hadoop.hbase.master.BaseScanner:
>> All 0 .META. region(s) scanned
>> > 2010-01-13 18:38:31,575 INFO
>> org.apache.hadoop.hbase.master.ServerManager: 5 region servers, 0 dead,
>> average load 0.16666666666666666
>> > 2010-01-13 18:38:32,740 INFO org.apache.hadoop.hbase.master.BaseScanner:
>> RegionManager.rootScanner scanning meta region {server: 10.37.17.248:60020,
>> regionname: -ROOT-,,0, startKey: <>}
>> > 2010-01-13 18:38:32,741 INFO org.apache.hadoop.ipc.HbaseRPC: Server at /
>> 10.37.17.248:60020 could not be reached after 1 tries, giving up.
>> > 2010-01-13 18:38:32,741 WARN org.apache.hadoop.hbase.master.BaseScanner:
>> Scan ROOT region
>> > org.apache.hadoop.hbase.client.RetriesExhaustedException: Failed setting
>> up proxy to /10.37.17.248:60020 after attempts=1
>> >        at
>> org.apache.hadoop.hbase.ipc.HBaseRPC.waitForProxy(HBaseRPC.java:424)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getHRegionConnection(HConnectionManager.java:865)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getHRegionConnection(HConnectionManager.java:881)
>> >        at
>> org.apache.hadoop.hbase.master.BaseScanner.scanRegion(BaseScanner.java:156)
>> >        at
>> org.apache.hadoop.hbase.master.RootScanner.scanRoot(RootScanner.java:54)
>> >        at
>> org.apache.hadoop.hbase.master.RootScanner.maintenanceScan(RootScanner.java:79)
>> >        at
>> org.apache.hadoop.hbase.master.BaseScanner.chore(BaseScanner.java:136)
>> >        at org.apache.hadoop.hbase.Chore.run(Chore.java:68)
>> > 2010-01-13 18:38:32,742 INFO org.apache.hadoop.hbase.master.BaseScanner:
>> All 0 .META. region(s) scanned
>> > 2010-01-13 18:39:31,575 INFO
>> org.apache.hadoop.hbase.master.ServerManager: 5 region servers, 0 dead,
>> average load 0.16666666666666666
>> > 2010-01-13 18:39:32,740 INFO org.apache.hadoop.hbase.master.BaseScanner:
>> RegionManager.rootScanner scanning meta region {server: 10.37.17.248:60020,
>> regionname: -ROOT-,,0, startKey: <>}
>> > 2010-01-13 18:39:32,741 INFO org.apache.hadoop.ipc.HbaseRPC: Server at /
>> 10.37.17.248:60020 could not be reached after 1 tries, giving up.
>> > 2010-01-13 18:39:32,741 WARN org.apache.hadoop.hbase.master.BaseScanner:
>> Scan ROOT region
>> > org.apache.hadoop.hbase.client.RetriesExhaustedException: Failed setting
>> up proxy to /10.37.17.248:60020 after attempts=1
>> >        at
>> org.apache.hadoop.hbase.ipc.HBaseRPC.waitForProxy(HBaseRPC.java:424)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getHRegionConnection(HConnectionManager.java:865)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getHRegionConnection(HConnectionManager.java:881)
>> >        at
>> org.apache.hadoop.hbase.master.BaseScanner.scanRegion(BaseScanner.java:156)
>> >        at
>> org.apache.hadoop.hbase.master.RootScanner.scanRoot(RootScanner.java:54)
>> >        at
>> org.apache.hadoop.hbase.master.RootScanner.maintenanceScan(RootScanner.java:79)
>> >        at
>> org.apache.hadoop.hbase.master.BaseScanner.chore(BaseScanner.java:136)
>> >        at org.apache.hadoop.hbase.Chore.run(Chore.java:68)
>> > 2010-01-13 18:39:32,742 INFO org.apache.hadoop.hbase.master.BaseScanner:
>> All 0 .META. region(s) scanned
>> > 2010-01-13 18:40:31,575 INFO
>> org.apache.hadoop.hbase.master.ServerManager: 5 region servers, 0 dead,
>> average load 0.16666666666666666
>> > 2010-01-13 18:40:32,740 INFO org.apache.hadoop.hbase.master.BaseScanner:
>> RegionManager.rootScanner scanning meta region {server: 10.37.17.248:60020,
>> regionname: -ROOT-,,0, startKey: <>}
>> > 2010-01-13 18:40:32,740 INFO org.apache.hadoop.ipc.HbaseRPC: Server at /
>> 10.37.17.248:60020 could not be reached after 1 tries, giving up.
>> > 2010-01-13 18:40:32,741 WARN org.apache.hadoop.hbase.master.BaseScanner:
>> Scan ROOT region
>> > org.apache.hadoop.hbase.client.RetriesExhaustedException: Failed setting
>> up proxy to /10.37.17.248:60020 after attempts=1
>> >        at
>> org.apache.hadoop.hbase.ipc.HBaseRPC.waitForProxy(HBaseRPC.java:424)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getHRegionConnection(HConnectionManager.java:865)
>> >        at
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getHRegionConnection(HConnectionManager.java:881)
>> >        at
>> org.apache.hadoop.hbase.master.BaseScanner.scanRegion(BaseScanner.java:156)
>> >        at
>> org.apache.hadoop.hbase.master.RootScanner.scanRoot(RootScanner.java:54)
>> >        at
>> org.apache.hadoop.hbase.master.RootScanner.maintenanceScan(RootScanner.java:79)
>> >        at
>> org.apache.hadoop.hbase.master.BaseScanner.chore(BaseScanner.java:136)
>> >        at org.apache.hadoop.hbase.Chore.run(Chore.java:68)
>> > .....
>> >
>> >
>> > Can somebody help me. Thank you.
>> > ------------------
>> > Zhongyuan
>> > 2010-01-13
>> >
>> >
>> >
>>
>

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