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From Jean-Daniel Cryans <jdcry...@apache.org>
Subject Re: Problems with Hbase Restart
Date Wed, 13 Jan 2010 17:39:53 GMT
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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