hi，there:
I encount a problem，it let me upset.
I use version of hadoop is hadoop-2.3.0-cdh5.1.0，namenode HA use the Quorum
Journal Manager (QJM) feature ，dfs.ha.fencing.methods option is following：
<property>
<name>dfs.ha.fencing.methods</name>
<value>sshfence
shell(q_hadoop_fence.sh $target_host $target_port)
</value>
</property>
or
<property>
<name>dfs.ha.fencing.methods</name>
<value>sshfence
shell(/bin/true)
</value>
</property>
I use iptables to simulate machine of active namenode crash。After automatic
failover completed，hdfs can the normal write，for example ./bin/hdfs dfs -put
a.txt /tmp,but hbase still can not write.
After a very long time，hbase can write,but I can not statistic How long did it
take.
I want to ask：
1、Why hdfs Complete failover，hbase can not write？
2、After hdfs Complete failover，how long hbase can write？
3、Whether a particular parameters influence this time？
Looking forward for your responses!
attach regionserver log,until the following content appears to be able to
write：
2014-12-01 11:35:16,965 INFO [MemStoreFlusher.6] regionserver.HRegion:
Finished memstore flush of ~7.9 K/8096, currentsize=0/0 for region
t,,1417403859247.645d0fbe63663fabfb73025d3eb99524. in 46ms, sequenceid=48,
compaction requested=false
2014-12-01 11:35:17,755 WARN [RpcServer.reader=1,port=60020] ipc.RpcServer:
RpcServer.listener,port=60020: count of bytes read: 0
java.io.IOException: Connection reset by peer
at sun.nio.ch.FileDispatcherImpl.read0(Native Method)
at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:39)
at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223)
at sun.nio.ch.IOUtil.read(IOUtil.java:197)
at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:379)
at
org.apache.hadoop.hbase.ipc.RpcServer.channelRead(RpcServer.java:2248)
at
org.apache.hadoop.hbase.ipc.RpcServer$Connection.readAndProcess(RpcServer.java:1427)
at
org.apache.hadoop.hbase.ipc.RpcServer$Listener.doRead(RpcServer.java:802)
at
org.apache.hadoop.hbase.ipc.RpcServer$Listener$Reader.doRunLoop(RpcServer.java:593)
at
org.apache.hadoop.hbase.ipc.RpcServer$Listener$Reader.run(RpcServer.java:568)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:744)
part of the datanode log is following：
2014-11-28 16:51:56,420 INFO org.apache.hadoop.ipc.Client: Retrying connect to
server: l-hbase1.dba.dev.cn0/10.86.36.217:8020. Already tried 8 time(s); retry
policy is
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2014-11-28 16:52:12,421 INFO org.apache.hadoop.ipc.Client: Retrying connect to
server: l-hbase1.dba.dev.cn0/10.86.36.217:8020. Already tried 9 time(s); retry
policy is
RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2014-11-28 16:52:27,422 WARN org.apache.hadoop.hdfs.server.datanode.DataNode:
IOException in offerService
java.net.ConnectException: Call From
l-hbase3.dba.dev.cn0.qunar.com/10.86.36.219 to l-hbase1.dba.dev.cn0:8020 failed
on connection exception: java.net.ConnectException:
Connection timed out; For more details see:
http://wiki.apache.org/hadoop/ConnectionRefused
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at org.apache.hadoop.net.NetUtils.wrapWithMessage(NetUtils.java:783)
at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:730)
at org.apache.hadoop.ipc.Client.call(Client.java:1413)
at org.apache.hadoop.ipc.Client.call(Client.java:1362)
at
org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:206)
at com.sun.proxy.$Proxy9.sendHeartbeat(Unknown Source)
at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at
org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:186)
at
org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102)
at com.sun.proxy.$Proxy9.sendHeartbeat(Unknown Source)
at
org.apache.hadoop.hdfs.protocolPB.DatanodeProtocolClientSideTranslatorPB.sendHeartbeat(DatanodeProtocolClientSideTranslatorPB.java:178)
at
org.apache.hadoop.hdfs.server.datanode.BPServiceActor.sendHeartBeat(BPServiceActor.java:566)
at
org.apache.hadoop.hdfs.server.datanode.BPServiceActor.offerService(BPServiceActor.java:664)
at
org.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:834)
at java.lang.Thread.run(Thread.java:744)
Caused by: java.net.ConnectException: Connection timed out
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at
sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:735)
at
org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206)
at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:529)
at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:493)
at
org.apache.hadoop.ipc.Client$Connection.setupConnection(Client.java:604)
at
org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:699)
at org.apache.hadoop.ipc.Client$Connection.access$2800(Client.java:367)
at org.apache.hadoop.ipc.Client.getConnection(Client.java:1461)
at org.apache.hadoop.ipc.Client.call(Client.java:1380)
... 14 more
2014-11-28 16:52:43,424 INFO org.apache.hadoop.ipc.Client: Retrying connect to
server: l-hbase1.dba.dev.cn0/10.86.36.217:8020. Already tried 0 time(s); retry
policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000
MILLISECONDS)
2014-11-28 16:52:59,424 INFO org.apache.hadoop.ipc.Client: Retrying connect to
server: l-hbase1.dba.dev.cn0/10.86.36.217:8020. Already tried 1 time(s); retry
policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000
MILLISECONDS)
2014-11-28 16:53:15,425 INFO org.apache.hadoop.ipc.Client: Retrying connect to
server: l-hbase1.dba.dev.cn0/10.86.36.217:8020. Already tried 2 time(s); retry
policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000
MILLISECONDS)
