Yes, ted, can you tell me what the following excpetion means in
l-namenode1.log?
2015-05-15 12:16:40,522 INFO
[MASTER_SERVER_OPERATIONS-l-namenode1:60000-0]
handler.ServerShutdownHandler: Finished processing of shutdown of
l-hbase31.data.cn8.qunar.com,60020,1427789773001
2015-05-15 12:17:11,301 WARN [686544788@qtp-660252776-212]
client.HConnectionManager$HConnectionImplementation: Checking master
connection
Does this mean the cluster was not operational?
2015-05-18 11:45 GMT+08:00 Ted Yu <yuzhih...@gmail.com>:
> After l-namenode1 became active master , it assigned regions:
>
> 2015-05-15 12:16:40,432 INFO [master:l-namenode1:60000]
> master.RegionStates: Transitioned {6f806bb62b347c992cd243fc909276ff
> state=OFFLINE, ts=1431663400432, server=null} to
> {6f806bb62b347c992cd243fc909276ff state=OPEN, ts=1431663400432, server=
> l-hbase31.data.cn8.qunar.com,60020,1431462584879}
>
> However, l-hbase31 went down:
>
> 2015-05-15 12:16:40,508 INFO
> [MASTER_SERVER_OPERATIONS-l-namenode1:60000-0]
> handler.ServerShutdownHandler: Splitting logs for
> l-hbase31.data.cn8.qunar.com,60020,1427789773001 before assignment.
>
> l-namenode1 was restarted :
>
> 2015-05-15 12:20:25,322 INFO [main] util.VersionInfo: HBase 0.96.0-hadoop2
> 2015-05-15 12:20:25,323 INFO [main] util.VersionInfo: Subversion
> https://svn.apache.org/repos/asf/hbase/branches/0.96 -r 1531434
>
> However, it went down due to zookeeper session expiration:
>
> 2015-05-15 12:20:25,580 WARN [main] zookeeper.ZooKeeperNodeTracker: Can't
> get or delete the master znode
> org.apache.zookeeper.KeeperException$SessionExpiredException:
> KeeperErrorCode = Session expired for /hbase/master
>
> It started again after that and AssignmentManager did a lot of assignments.
>
> Looks like the cluster was operational this time.
>
> Cheers
>
> On Sun, May 17, 2015 at 8:24 AM, Ted Yu <yuzhih...@gmail.com> wrote:
>
> > bq. the backup master take over at 2015-05-15 12:16:40,024 ?
> >
> > The switch of active master should be earlier than 12:16:40,024 - shortly
> > after 12:15:58
> >
> > l-namenode1 would do some initialization (such as waiting for region
> > servers count to settle) after it became active master.
> >
> > I tried to download from http://pan.baidu.com/s/1eQlKXj0 (at home) but
> > the download progress was very slow.
> >
> > Will try downloading later in the day.
> >
> > Do you have access to pastebin ?
> >
> > Cheers
> >
> > On Sun, May 17, 2015 at 2:07 AM, Louis Hust <louis.h...@gmail.com>
> wrote:
> >
> >> Hi, ted,
> >>
> >> Thanks for your reply!!
> >>
> >> I found the log in l-namenode2.dba.cn8 during the restarting progress:
> >> 2015-05-15 12:11:36,540 INFO [master:l-namenode2:60000]
> >> master.ServerManager: Finished waiting for region servers count to
> settle;
> >> checked in 5, slept for 4511 ms, expecting minimum of 1, maximum of
> >> 2147483647, master is running.
> >>
> >> So this means the HMaster ready for handle request at 12:11:36?
> >>
> >> The backup master is l-namenode1.dba.cn8 and you can get the log at :
> >>
> >> http://pan.baidu.com/s/1eQlKXj0
> >>
> >> After the l-namenode2.dba.cn8 is stopped by me at 12:15:58,
> >> the backup master l-namenode1 take over, and i found log:
> >>
> >> 2015-05-15 12:16:40,024 INFO [master:l-namenode1:60000]
> >> master.ServerManager: Finished waiting for region servers count to
> settle;
> >> checked in 4, slept for 5663 ms, expecting minimum of 1, maximum of
> >> 2147483647, master is running.
> >>
> >> So the backup master take over at 2015-05-15 12:16:40,024 ?
> >>
> >> But it seems the l-namenode2 not working normally with the exception in
> >> log:
> >>
> >> 2015-05-15 12:16:40,522 INFO
> >> [MASTER_SERVER_OPERATIONS-l-namenode1:60000-0]
> >> handler.ServerShutdownHandler: Finished processing of shutdown of
> >> l-hbase31.data.cn8.qunar.com,60020,1427789773001
> >> 2015-05-15 12:17:11,301 WARN [686544788@qtp-660252776-212]
> >> client.HConnectionManager$HConnectionImplementation: Checking master
> >> connection
> >> com.google.protobuf.ServiceException: java.net.ConnectException:
> >> Connection
> >> refused
> >> at
> >>
> >>
> org.apache.hadoop.hbase.ipc.RpcClient.callBlockingMethod(RpcClient.java:1667)
> >> at
> >>
> >>
> org.apache.hadoop.hbase.ipc.RpcClient$BlockingRpcChannelImplementation.callBlockingMethod(RpcClient.java:1708)
> >> at
> >>
> >>
> org.apache.hadoop.hbase.protobuf.generated.MasterProtos$MasterService$BlockingStub.isMasterRunning(MasterProtos.java:40216)
> >> at
> >>
> >>
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation$MasterServiceState.isMasterRunning(HConnectionManager.java:1484)
> >> at
> >>
> >>
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.isKeepAliveMasterConnectedAndRunning(HConnectionManager.java:2110)
> >> at
> >>
> >>
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getKeepAliveMasterService(HConnectionManager.java:1836)
> >>
> >> Is the exception means the HMaster not working normally or somewhat?
> >>
> >>
> >>
> >> 2015-05-17 11:06 GMT+08:00 Ted Yu <yuzhih...@gmail.com>:
> >>
> >> > bq. the HMaster is handling two region server down, and not ready to
> >> handle
> >> > client request?
> >> >
> >> > I didn't mean that - for a functioning master, handling region server
> >> > shutdown is part of the master's job.
> >> >
> >> > You should see something similar to the following in (functioning)
> >> master
> >> > log:
> >> >
> >> > 2015-05-13 04:06:36,266 INFO [master:c6401:60000]
> master.ServerManager:
> >> > Finished waiting for region servers count to settle; checked in 1,
> slept
> >> > for 71582 ms, expecting minimum of 1, maximum of 2147483647, master
> is
> >> > running.
> >> >
> >> > bq. wait the backend HMaster to take over
> >> >
> >> > Was there exception in backup master log after it took over ?
> >> >
> >> > On Sat, May 16, 2015 at 6:44 PM, Louis Hust <louis.h...@gmail.com>
> >> wrote:
> >> >
> >> > > hi,ted,
> >> > >
> >> > > Thanks very much!
> >> > >
> >> > > Namenode process was not running on
> >> l-namenode2.dba.cn8(192.168.39.22),
> >> > > just HMaster run on it。
> >> > > So you means that at 2015-05-15 12:15:04, the HMaster is handling
> two
> >> > > region server down, and not
> >> > > ready to handle client request? And how can i tell when the HMaster
> is
> >> > > ready to handle client request
> >> > > from the logs?
> >> > >
> >> > > I stop the Hmaster at 12:15:58 cause the HMaster can not handling
> >> > request,
> >> > > so i want to stop it and wait
> >> > > the backend HMaster to take over.
> >> > >
> >> > >
> >> > >
> >> > >
> >> > > 2015-05-17 0:29 GMT+08:00 Ted Yu <yuzhih...@gmail.com>:
> >> > >
> >> > > > In the period you identified, master was assigning regions.
> >> > > > e.g.
> >> > > >
> >> > > > 2015-05-15 12:13:09,683 INFO
> >> > > > [l-namenode2.dba.cn8.qunar.com
> >> > > ,60000,1431663090427-GeneralBulkAssigner-0]
> >> > > > master.RegionStates: Transitioned
> {c634280ce287b2d6cebd88b61accf685
> >> > > > state=OFFLINE, ts=1431663189621, server=null} to
> >> > > > {c634280ce287b2d6cebd88b61accf685 state=PENDING_OPEN,
> >> ts=1431663189683,
> >> > > > server=l-hbase26.data.cn8.qunar.com,60020,1431462615651}
> >> > > > 2015-05-15 12:13:09,683 INFO
> >> > > > [l-namenode2.dba.cn8.qunar.com
> >> > > ,60000,1431663090427-GeneralBulkAssigner-2]
> >> > > > master.RegionStates: Transitioned
> {2f60b1b4e51d32ef98ad19690f13a565
> >> > > > state=OFFLINE, ts=1431663189621, server=null} to
> >> > > > {2f60b1b4e51d32ef98ad19690f13a565 state=PENDING_OPEN,
> >> ts=1431663189683,
> >> > > > server=l-hbase30.data.cn8.qunar.com,60020,1431462562233}
> >> > > >
> >> > > > Then two region servers went down:
> >> > > >
> >> > > > 2015-05-15 12:14:40,699 INFO [main-EventThread]
> >> > > > zookeeper.RegionServerTracker: RegionServer ephemeral node
> deleted,
> >> > > > processing expiration [l-hbase27.data.cn8.qunar.com,60020,
> >> > > > 1431663208899]
> >> > > > 2015-05-15 12:15:04,899 INFO [main-EventThread]
> >> > > > zookeeper.RegionServerTracker: RegionServer ephemeral node
> deleted,
> >> > > > processing expiration [l-hbase25.data.cn8.qunar.com,60020,
> >> > > > 1431663193865]
> >> > > >
> >> > > > Master was stopped afterwards:
> >> > > >
> >> > > > Fri May 15 12:15:58 CST 2015 Terminating master
> >> > > >
> >> > > > Namenode process was running on l-namenode2.dba.cn8, right ?
> >> > > >
> >> > > > Cheers
> >> > > >
> >> > > > On Sat, May 16, 2015 at 7:50 AM, Louis Hust <louis.h...@gmail.com
> >
> >> > > wrote:
> >> > > >
> >> > > > > hi, TED,
> >> > > > > Any idea?
> >> > > > > When the HMaster restart, how can i know when it is really can
> >> handle
> >> > > > > request from application? is there any mark in logs?
> >> > > > >
> >> > > > > 2015-05-16 14:05 GMT+08:00 Louis Hust <louis.h...@gmail.com>:
> >> > > > >
> >> > > > > > @Ted,
> >> > > > > > plz see the log from 12:11:29 to 12:15:28, this timerange the
> >> > HMaster
> >> > > > is
> >> > > > > > in restarting stage, but can not handle request from client?
> Is
> >> the
> >> > > > > HMaster
> >> > > > > > recovering or do something else?
> >> > > > > >
> >> > > > > > 2015-05-16 13:59 GMT+08:00 Louis Hust <louis.h...@gmail.com>:
> >> > > > > >
> >> > > > > >> OK, you can get the log from
> >> > > > > >> http://pan.baidu.com/s/1pqS6E
> >> > > > > >>
> >> > > > > >>
> >> > > > > >> 2015-05-16 13:26 GMT+08:00 Ted Yu <yuzhih...@gmail.com>:
> >> > > > > >>
> >> > > > > >>> Can you check server log on 192.168.39.22
> >> > > > > >>> <http://l-namenode2.dba.cn8.qunar.com/192.168.39.22:60000>
> ?
> >> > > > > >>>
> >> > > > > >>> That should give you some clue.
> >> > > > > >>>
> >> > > > > >>> Cheers
> >> > > > > >>>
> >> > > > > >>> On Fri, May 15, 2015 at 8:22 PM, Louis Hust <
> >> > louis.h...@gmail.com>
> >> > > > > >>> wrote:
> >> > > > > >>>
> >> > > > > >>> > Hi all,
> >> > > > > >>> >
> >> > > > > >>> > I use hbase0.96.0 with hadoop 2.2.0,
> >> > > > > >>> > and the custom said they can not write into hbase cluster,
> >> > > > > >>> > So i stop the HMaster and start it soon,
> >> > > > > >>> >
> >> > > > > >>> > But it seems that the HMaster not response to request,
> >> > following
> >> > > is
> >> > > > > the
> >> > > > > >>> > HMaster log:
> >> > > > > >>> >
> >> > > > > >>> > {logs}
> >> > > > > >>> > 2015-05-15 12:13:33,136 INFO [AM.ZK.Worker-pool2-t16]
> >> > > > > >>> master.RegionStates:
> >> > > > > >>> > Transitioned {9036a3befee90eeffb9082f90a4a9afa
> >> state=OPENING,
> >> > > > > >>> > ts=1431663212637, server=l-hbase26.data.cn8.qunar.com
> >> > > > > >>> ,60020,1431462615651}
> >> > > > > >>> > to {9036a3befee90eeffb9082f90a4a9afa state=OPEN,
> >> > > ts=1431663213136,
> >> > > > > >>> server=
> >> > > > > >>> > l-hbase26.data.cn8.qunar.com,60020,1431462615651}
> >> > > > > >>> > 2015-05-15 12:13:33,139 INFO [AM.ZK.Worker-pool2-t4]
> >> > > > > >>> master.RegionStates:
> >> > > > > >>> > Onlined 9036a3befee90eeffb9082f90a4a9afa on
> >> > > > > >>> l-hbase26.data.cn8.qunar.com
> >> > > > > >>> > ,60020,1431462615651
> >> > > > > >>> > 2015-05-15 12:14:40,699 INFO [main-EventThread]
> >> > > > > >>> > zookeeper.RegionServerTracker: RegionServer ephemeral node
> >> > > deleted,
> >> > > > > >>> > processing expiration [l-hbase27.data.cn8.qunar.com
> >> > > > > >>> ,60020,1431663208899]
> >> > > > > >>> > 2015-05-15 12:15:04,899 INFO [main-EventThread]
> >> > > > > >>> > zookeeper.RegionServerTracker: RegionServer ephemeral node
> >> > > deleted,
> >> > > > > >>> > processing expiration [l-hbase25.data.cn8.qunar.com
> >> > > > > >>> ,60020,1431663193865]
> >> > > > > >>> > 2015-05-15 12:15:24,465 WARN [249240421@qtp-591022857-33
> ]
> >> > > > > >>> > client.HConnectionManager$HConnectionImplementation:
> >> Checking
> >> > > > master
> >> > > > > >>> > connection
> >> > > > > >>> > com.google.protobuf.ServiceException:
> >> > > > > java.net.SocketTimeoutException:
> >> > > > > >>> Call
> >> > > > > >>> > to l-namenode2.dba.cn8.qunar.com/192.168.39.22:60000
> failed
> >> > > > because
> >> > > > > >>> > java.net.SocketTimeoutException: 60000 millis timeout
> while
> >> > > waiting
> >> > > > > for
> >> > > > > >>> > channel to be ready for read. ch :
> >> > > > > >>> > java.nio.channels.SocketChannel[connected local=/
> >> > > > 192.168.39.22:47700
> >> > > > > >>> > remote=
> >> > > > > >>> > l-namenode2.dba.cn8.qunar.com/192.168.39.22:60000]
> >> > > > > >>> > at
> >> > > > > >>> >
> >> > > > > >>> >
> >> > > > > >>>
> >> > > > >
> >> > > >
> >> > >
> >> >
> >>
> org.apache.hadoop.hbase.ipc.RpcClient.callBlockingMethod(RpcClient.java:1667)
> >> > > > > >>> > at
> >> > > > > >>> >
> >> > > > > >>> >
> >> > > > > >>>
> >> > > > >
> >> > > >
> >> > >
> >> >
> >>
> org.apache.hadoop.hbase.ipc.RpcClient$BlockingRpcChannelImplementation.callBlockingMethod(RpcClient.java:1708)
> >> > > > > >>> > at
> >> > > > > >>> >
> >> > > > > >>> >
> >> > > > > >>>
> >> > > > >
> >> > > >
> >> > >
> >> >
> >>
> org.apache.hadoop.hbase.protobuf.generated.MasterProtos$MasterService$BlockingStub.isMasterRunning(MasterProtos.java:40216)
> >> > > > > >>> > at
> >> > > > > >>> >
> >> > > > > >>> >
> >> > > > > >>>
> >> > > > >
> >> > > >
> >> > >
> >> >
> >>
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation$MasterServiceState.isMasterRunning(HConnectionManager.java:1484)
> >> > > > > >>> > at
> >> > > > > >>> >
> >> > > > > >>> >
> >> > > > > >>>
> >> > > > >
> >> > > >
> >> > >
> >> >
> >>
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.isKeepAliveMasterConnectedAndRunning(HConnectionManager.java:2110)
> >> > > > > >>> > at
> >> > > > > >>> >
> >> > > > > >>> >
> >> > > > > >>>
> >> > > > >
> >> > > >
> >> > >
> >> >
> >>
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getKeepAliveMasterService(HConnectionManager.java:1836)
> >> > > > > >>> > at
> >> > > > > >>> >
> >> > > > > >>> >
> >> > > > > >>>
> >> > > > >
> >> > > >
> >> > >
> >> >
> >>
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.listTables(HConnectionManager.java:2531)
> >> > > > > >>> > at
> >> > > > > >>> >
> >> > > > > >>>
> >> > > > >
> >> > >
> >>
> org.apache.hadoop.hbase.client.HBaseAdmin.listTables(HBaseAdmin.java:298)
> >> > > > > >>> > at
> >> > > > > >>> >
> >> > > > > >>> >
> >> > > > > >>>
> >> > > > >
> >> > > >
> >> > >
> >> >
> >>
> org.apache.hadoop.hbase.tmpl.master.MasterStatusTmplImpl.__jamon_innerUnit__userTables(MasterStatusTmplImpl.java:530)
> >> > > > > >>> > at
> >> > > > > >>> >
> >> > > > > >>> >
> >> > > > > >>>
> >> > > > >
> >> > > >
> >> > >
> >> >
> >>
> org.apache.hadoop.hbase.tmpl.master.MasterStatusTmplImpl.renderNoFlush(MasterStatusTmplImpl.java:255)
> >> > > > > >>> > at
> >> > > > > >>> >
> >> > > > > >>> >
> >> > > > > >>>
> >> > > > >
> >> > > >
> >> > >
> >> >
> >>
> org.apache.hadoop.hbase.tmpl.master.MasterStatusTmpl.renderNoFlush(MasterStatusTmpl.java:382)
> >> > > > > >>> > at
> >> > > > > >>> >
> >> > > > > >>> >
> >> > > > > >>>
> >> > > > >
> >> > > >
> >> > >
> >> >
> >>
> org.apache.hadoop.hbase.tmpl.master.MasterStatusTmpl.render(MasterStatusTmpl.java:372)
> >> > > > > >>> > at
> >> > > > > >>> >
> >> > > > > >>> >
> >> > > > > >>>
> >> > > > >
> >> > > >
> >> > >
> >> >
> >>
> org.apache.hadoop.hbase.master.MasterStatusServlet.doGet(MasterStatusServlet.java:95)
> >> > > > > >>> > at
> >> javax.servlet.http.HttpServlet.service(HttpServlet.java:734)
> >> > > > > >>> > at
> >> javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
> >> > > > > >>> > at
> >> > > > > >>>
> >> > > >
> >> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
> >> > > > > >>> > at
> >> > > > > >>> >
> >> > > > > >>> >
> >> > > > > >>>
> >> > > > >
> >> > > >
> >> > >
> >> >
> >>
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1221)
> >> > > > > >>> > at
> >> > > > > >>> >
> >> > > > > >>> >
> >> > > > > >>>
> >> > > > >
> >> > > >
> >> > >
> >> >
> >>
> org.apache.hadoop.http.lib.StaticUserWebFilter$StaticUserFilter.doFilter(StaticUserWebFilter.java:109)
> >> > > > > >>> > at
> >> > > > > >>> >
> >> > > > > >>> >
> >> > > > > >>>
> >> > > > >
> >> > > >
> >> > >
> >> >
> >>
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
> >> > > > > >>> > at
> >> > > > > >>> >
> >> > > > > >>> >
> >> > > > > >>>
> >> > > > >
> >> > > >
> >> > >
> >> >
> >>
> org.apache.hadoop.http.HttpServer$QuotingInputFilter.doFilter(HttpServer.java:1081)
> >> > > > > >>> > at
> >> > > > > >>> >
> >> > > > > >>> >
> >> > > > > >>>
> >> > > > >
> >> > > >
> >> > >
> >> >
> >>
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
> >> > > > > >>> > at
> >> > > > >
> >> org.apache.hadoop.http.NoCacheFilter.doFilter(NoCacheFilter.java:45)
> >> > > > > >>> > at
> >> > > > > >>> >
> >> > > > > >>> >
> >> > > > > >>>
> >> > > > >
> >> > > >
> >> > >
> >> >
> >>
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
> >> > > > > >>> > at
> >> > > > > >>>
> >> > > > >
> >> > >
> >> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:399)
> >> > > > > >>> > at
> >> > > > > >>> >
> >> > > > > >>>
> >> > > > >
> >> > > >
> >> > >
> >> >
> >>
> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
> >> > > > > >>> > at
> >> > > > > >>>
> >> > > > >
> >> > >
> >> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
> >> > > > > >>> > at
> >> > > > > >>>
> >> > > > >
> >> > >
> >> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766)
> >> > > > > >>> > at
> >> > > > > >>>
> >> > >
> org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:450)
> >> > > > > >>> > at
> >> > > > > >>> >
> >> > > > > >>> >
> >> > > > > >>>
> >> > > > >
> >> > > >
> >> > >
> >> >
> >>
> org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
> >> > > > > >>> > at
> >> > > > > >>>
> >> > > > >
> >> > >
> >> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
> >> > > > > >>> > at org.mortbay.jetty.Server.handle(Server.java:326)
> >> > > > > >>> > at
> >> > > > > >>>
> >> > > >
> >> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
> >> > > > > >>> > at
> >> > > > > >>> >
> >> > > > > >>> >
> >> > > > > >>>
> >> > > > >
> >> > > >
> >> > >
> >> >
> >>
> org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:928)
> >> > > > > >>> > at
> >> org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:549)
> >> > > > > >>> > at
> >> > > org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
> >> > > > > >>> > at
> >> > > org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
> >> > > > > >>> > at
> >> > > > > >>> >
> >> > > > > >>> >
> >> > > > > >>>
> >> > > > >
> >> > > >
> >> > >
> >> >
> >>
> org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:410)
> >> > > > > >>> > at
> >> > > > > >>> >
> >> > > > > >>> >
> >> > > > > >>>
> >> > > > >
> >> > > >
> >> > >
> >> >
> >>
> org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
> >> > > > > >>> > Caused by: java.net.SocketTimeoutException: Call to
> >> > > > > >>> > l-namenode2.dba.cn8.qunar.com/192.168.39.22:60000 failed
> >> > because
> >> > > > > >>> > java.net.SocketTimeoutException: 60000 millis timeout
> while
> >> > > waiting
> >> > > > > for
> >> > > > > >>> > channel to be ready for read. ch :
> >> > > > > >>> > java.nio.channels.SocketChannel[connected local=/
> >> > > > 192.168.39.22:47700
> >> > > > > >>> > remote=
> >> > > > > >>> > l-namenode2.dba.cn8.qunar.com/192.168.39.22:60000]
> >> > > > > >>> > at
> >> > > > > >>>
> >> > > > >
> >> > >
> >> org.apache.hadoop.hbase.ipc.RpcClient.wrapException(RpcClient.java:1475)
> >> > > > > >>> > at
> >> > > org.apache.hadoop.hbase.ipc.RpcClient.call(RpcClient.java:1450)
> >> > > > > >>> > at
> >> > > > > >>> >
> >> > > > > >>> >
> >> > > > > >>>
> >> > > > >
> >> > > >
> >> > >
> >> >
> >>
> org.apache.hadoop.hbase.ipc.RpcClient.callBlockingMethod(RpcClient.java:1650)
> >> > > > > >>> > ... 37 more
> >> > > > > >>> > Caused by: java.net.SocketTimeoutException: 60000 millis
> >> > timeout
> >> > > > > while
> >> > > > > >>> > waiting for channel to be ready for read. ch :
> >> > > > > >>> > java.nio.channels.SocketChannel[connected local=/
> >> > > > 192.168.39.22:47700
> >> > > > > >>> > remote=
> >> > > > > >>> > l-namenode2.dba.cn8.qunar.com/192.168.39.22:60000]
> >> > > > > >>> > at
> >> > > > > >>> >
> >> > > > > >>> >
> >> > > > > >>>
> >> > > > >
> >> > > >
> >> > >
> >> >
> >>
> org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:164)
> >> > > > > >>> > at
> >> > > > > >>>
> >> > > > >
> >> > >
> >> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:161)
> >> > > > > >>> > at
> >> > > > > >>>
> >> > > > >
> >> > >
> >> org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:131)
> >> > > > > >>> > at
> >> java.io.FilterInputStream.read(FilterInputStream.java:133)
> >> > > > > >>> > at
> >> java.io.FilterInputStream.read(FilterInputStream.java:133)
> >> > > > > >>> > at
> >> > > > > >>> >
> >> > > > > >>> >
> >> > > > > >>>
> >> > > > >
> >> > > >
> >> > >
> >> >
> >>
> org.apache.hadoop.hbase.ipc.RpcClient$Connection$PingInputStream.read(RpcClient.java:553)
> >> > > > > >>> > at
> >> > java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
> >> > > > > >>> > at
> >> > java.io.BufferedInputStream.read(BufferedInputStream.java:254)
> >> > > > > >>> > at
> java.io.DataInputStream.readInt(DataInputStream.java:387)
> >> > > > > >>> > at
> >> > > > > >>> >
> >> > > > > >>> >
> >> > > > > >>>
> >> > > > >
> >> > > >
> >> > >
> >> >
> >>
> org.apache.hadoop.hbase.ipc.RpcClient$Connection.readResponse(RpcClient.java:1057)
> >> > > > > >>> > at
> >> > > > > >>>
> >> > > > >
> >> > >
> >> org.apache.hadoop.hbase.ipc.RpcClient$Connection.run(RpcClient.java:719)
> >> > > > > >>> > Fri May 15 12:15:58 CST 2015 Terminating master
> >> > > > > >>> > {/logs}
> >> > > > > >>> > So what the exception means? Why? and how to solve the
> >> problem?
> >> > > > > >>> >
> >> > > > > >>>
> >> > > > > >>
> >> > > > > >>
> >> > > > > >
> >> > > > >
> >> > > >
> >> > >
> >> >
> >>
> >
> >
>
