hadoop HA架构安装部署（QJM HA）
###################HDFS High Availability Using the Quorum Journal Manager################################
规划集群
db01 db02 db03 db04 db05
namenode namenode
journalnode journalnode journalnode
datanode datanode datanode datanode datanode
编辑配置文件core-site.xml：
[hadoop@db01 hadoop]$ cat core-site.xml
fs.defaultFS hdfs://ns1
hadoop.tmp.dir /usr/local/hadoop-2.5.0/data/tmp
fs.trash.interval 7000
编辑配置文件hdfs-site.xml：
[hadoop@db01 hadoop]$ cat hdfs-site.xml
dfs.nameservices ns1
dfs.ha.namenodes.ns1 nn1,nn2
dfs.namenode.rpc-address.ns1.nn1 db01:8020 dfs.namenode.rpc-address.ns1.nn2 db02:8020
dfs.namenode.db01:50070 dfs.namenode.db02:50070
dfs.namenode.shared.edits.dir qjournal://db01:8485;db02:8485;db03:8485/ns1 dfs.journalnode.edits.dir /usr/local/hadoop-2.5.0/data/dfs/jn
dfs.client.failover.proxy.provider.ns1 org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider
dfs.ha.fencing.methods sshfence dfs.ha.fencing.ssh.private-key-files /home/hadoop/.ssh/id_dsa
同步文件：
[hadoop@db01 hadoop]$ scp core-site.xml hdfs-site.xml hadoop@db02:/usr/local/hadoop-2.5.0/etc/hadoop/core-site.xml 100% 1140 1.1KB/s 00:00 hdfs-site.xml 100% 2067 2.0KB/s 00:00 [hadoop@db01 hadoop]$ scp core-site.xml hdfs-site.xml hadoop@db03:/usr/local/hadoop-2.5.0/etc/hadoop/core-site.xml 100% 1140 1.1KB/s 00:00 hdfs-site.xml 100% 2067 2.0KB/s 00:00 [hadoop@db01 hadoop]$ scp core-site.xml hdfs-site.xml hadoop@db04:/usr/local/hadoop-2.5.0/etc/hadoop/core-site.xml 100% 1140 1.1KB/s 00:00 hdfs-site.xml 100% 2067 2.0KB/s 00:00 [hadoop@db01 hadoop]$ scp core-site.xml hdfs-site.xml hadoop@db05:/usr/local/hadoop-2.5.0/etc/hadoop/core-site.xml 100% 1140 1.1KB/s 00:00 hdfs-site.xml
启动集群：
1)启动journalnode服务
[hadoop@db01 hadoop-2.5.0]$ sbin/hadoop-daemon.sh start journalnodestarting journalnode, logging to /usr/local/hadoop-2.5.0/logs/hadoop-hadoop-journalnode-db01.out[hadoop@db01 hadoop-2.5.0]$ jps738 Jps688 JournalNode
[hadoop@db02 hadoop-2.5.0]$ sbin/hadoop-daemon.sh start journalnodestarting journalnode, logging to /usr/local/hadoop-2.5.0/logs/hadoop-hadoop-journalnode-db02.out[hadoop@db02 hadoop-2.5.0]$ jps16813 Jps16763 JournalNode
[hadoop@db02 hadoop-2.5.0]$ sbin/hadoop-daemon.sh start journalnodestarting journalnode, logging to /usr/local/hadoop-2.5.0/logs/hadoop-hadoop-journalnode-db02.out[hadoop@db02 hadoop-2.5.0]$ jps16813 Jps16763 JournalNode
2)格式化hdfs文件系统
[hadoop@db01 hadoop-2.5.0]$ bin/hdfs namenode -format
在nn1上启动namenode：
[hadoop@db01 hadoop-2.5.0]$ sbin/hadoop-daemon.sh start namenodestarting namenode, logging to /usr/local/hadoop-2.5.0/logs/hadoop-hadoop-namenode-db01.out
3)在nn2节点上同步nn1节点元数据（也可以直接cp元数据）
[hadoop@db02 hadoop-2.5.0]$ bin/hdfs namenode -bootstrapStandby
4)启动nn2上的namenode服务
[hadoop@db02 hadoop-2.5.0]$ sbin/hadoop-daemon.sh start namenodestarting namenode, logging to /usr/local/hadoop-2.5.0/logs/hadoop-hadoop-namenode-db02.out
5)启动所有的datanode服务
[hadoop@db01 hadoop-2.5.0]$ sbin/hadoop-daemon.sh start datanodestarting datanode, logging to /usr/local/hadoop-2.5.0/logs/hadoop-hadoop-datanode-db01.out[hadoop@db01 hadoop-2.5.0]$ jps1255 DataNode1001 NameNode1339 Jps688 JournalNode
[hadoop@db02 hadoop-2.5.0]$ sbin/hadoop-daemon.sh start datanodestarting datanode, logging to /usr/local/hadoop-2.5.0/logs/hadoop-hadoop-datanode-db02.out[hadoop@db02 hadoop-2.5.0]$ jps17112 DataNode17193 Jps16763 JournalNode16956 NameNode
[hadoop@db03 hadoop-2.5.0]$ sbin/hadoop-daemon.sh start datanodestarting datanode, logging to /usr/local/hadoop-2.5.0/logs/hadoop-hadoop-datanode-db03.out[hadoop@db03 hadoop-2.5.0]$ jps15813 JournalNode15995 Jps15921 DataNode
[hadoop@db04 hadoop-2.5.0]$ sbin/hadoop-daemon.sh start datanodestarting datanode, logging to /usr/local/hadoop-2.5.0/logs/hadoop-hadoop-datanode-db04.out[hadoop@db04 hadoop-2.5.0]$ jps14660 DataNode14734 Jps
[hadoop@db05 hadoop-2.5.0]$ sbin/hadoop-daemon.sh start datanodestarting datanode, logging to /usr/local/hadoop-2.5.0/logs/hadoop-hadoop-datanode-db05.out[hadoop@db05 hadoop-2.5.0]$ jps22165 DataNode22239 Jps
6)将nn1切换成active状态
[hadoop@db01 hadoop-2.5.0]$ bin/hdfs haadmin -transitionToActive nn117/03/12 03:04:46 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
[hadoop@db01 hadoop-2.5.0]$ bin/hdfs haadmin -getServiceState nn117/03/12 03:06:25 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicableactive[hadoop@db01 hadoop-2.5.0]$ bin/hdfs haadmin -getServiceState nn217/03/12 03:06:29 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicablestandby[hadoop@db01 hadoop-2.5.0]$
测试hfds文件系统：
[hadoop@db01 hadoop-2.5.0]$ bin/hdfs dfs -mkdir -p /user/hadoop/conf17/03/12 03:14:02 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
[hadoop@db01 hadoop-2.5.0]$ [hadoop@db01 hadoop-2.5.0]$ bin/hdfs dfs -ls -R /17/03/12 03:14:06 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicabledrwxr-xr-x - hadoop supergroup 0 2017-03-12 03:11 /userdrwxr-xr-x - hadoop supergroup 0 2017-03-12 03:14 /user/hadoopdrwxr-xr-x - hadoop supergroup 0 2017-03-12 03:14 /user/hadoop/conf[hadoop@db01 hadoop-2.5.0]$ [hadoop@db01 hadoop-2.5.0]$ bin/hdfs dfs -put etc/hadoop/core-site.xml etc/hadoop/hdfs-site.xml /user/hadoop/conf/17/03/12 03:14:44 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable[hadoop@db01 hadoop-2.5.0]$ bin/hdfs dfs -ls -R /17/03/12 03:15:12 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicabledrwxr-xr-x - hadoop supergroup 0 2017-03-12 03:11 /userdrwxr-xr-x - hadoop supergroup 0 2017-03-12 03:14 /user/hadoopdrwxr-xr-x - hadoop supergroup 0 2017-03-12 03:14 /user/hadoop/conf-rw-r--r-- 3 hadoop supergroup 1140 2017-03-12 03:14 /user/hadoop/conf/core-site.xml-rw-r--r-- 3 hadoop supergroup 2061 2017-03-12 03:14 /user/hadoop/conf/hdfs-site.xml[hadoop@db01 hadoop-2.5.0]$ bin/hdfs dfs -text /user/hadoop/conf/core-site.xml17/03/12 03:16:00 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
fs.defaultFS hdfs://ns1
hadoop.tmp.dir /usr/local/hadoop-2.5.0/data/tmp
fs.trash.interval 7000
手工方式验证active和standby的相互转换：
[hadoop@db01 hadoop-2.5.0]$ bin/hdfs haadmin -transitionToStandby nn117/03/12 03:20:12 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
[hadoop@db01 hadoop-2.5.0]$ bin/hdfs haadmin -transitionToActive nn217/03/12 03:20:39 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
[hadoop@db01 hadoop-2.5.0]$ bin/hdfs haadmin -getServiceState nn117/03/12 03:21:40 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicablestandby[hadoop@db01 hadoop-2.5.0]$ bin/hdfs haadmin -getServiceState nn217/03/12 03:21:44 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicableactive[hadoop@db01 hadoop-2.5.0]$ bin/hdfs dfs -text /user/hadoop/conf/core-site.xml17/03/12 03:22:07 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
fs.defaultFS hdfs://ns1
hadoop.tmp.dir /usr/local/hadoop-2.5.0/data/tmp
fs.trash.interval 7000
使用zookeeper实现hadoop ha的自动故障转移（failover）功能
hdfs-site.xml file, add:
dfs.ha.automatic-failover.enabled true
core-site.xml file, add:
ha.zookeeper.quorum db01:2181,db02:2181,db03:2181,db04:2181,db05:2181
关闭hdfs集群，并且同步文件：
[hadoop@db01 hadoop-2.5.0]$ sbin/stop-dfs.sh 17/03/12 13:07:00 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicableStopping namenodes on [db01 db02]db01: stopping namenodedb02: stopping namenodedb01: stopping datanodedb02: stopping datanodedb05: stopping datanodedb04: stopping datanodedb03: stopping datanodeStopping journal nodes [db01 db02 db03]db01: stopping journalnodedb03: stopping journalnodedb02: stopping journalnode17/03/12 13:07:20 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicableStopping ZK Failover Controllers on NN hosts [db01 db02]db01: no zkfc to stopdb02: no zkfc to stop
[hadoop@db01 hadoop-2.5.0]$ scp -r etc/hadoop/core-site.xml etc/hadoop/hdfs-site.xml hadoop@db02:/usr/local/hadoop-2.5.0/etc/hadoop/core-site.xml 100% 1269 1.2KB/s 00:00 hdfs-site.xml 100% 2158 2.1KB/s 00:00 [hadoop@db01 hadoop-2.5.0]$ scp -r etc/hadoop/core-site.xml etc/hadoop/hdfs-site.xml hadoop@db03:/usr/local/hadoop-2.5.0/etc/hadoop/core-site.xml 100% 1269 1.2KB/s 00:00 hdfs-site.xml 100% 2158 2.1KB/s 00:00 [hadoop@db01 hadoop-2.5.0]$ scp -r etc/hadoop/core-site.xml etc/hadoop/hdfs-site.xml hadoop@db04:/usr/local/hadoop-2.5.0/etc/hadoop/core-site.xml 100% 1269 1.2KB/s 00:00 hdfs-site.xml 100% 2158 2.1KB/s 00:00 [hadoop@db01 hadoop-2.5.0]$ scp -r etc/hadoop/core-site.xml etc/hadoop/hdfs-site.xml hadoop@db05:/usr/local/hadoop-2.5.0/etc/hadoop/core-site.xml 100% 1269 1.2KB/s 00:00 hdfs-site.xml 100% 2158 2.1KB/s 00:00
启动zookeeper集群：
[hadoop@db01 hadoop-2.5.0]$ ../zookeeper-3.4.5/bin/zkServer.sh startJMX enabled by defaultUsing config: /usr/local/zookeeper-3.4.5/bin/../conf/zoo.cfgStarting zookeeper ... STARTED[hadoop@db01 hadoop-2.5.0]$ jps10341 Jps10319 QuorumPeerMain
[hadoop@db02 hadoop-2.5.0]$ ../zookeeper-3.4.5/bin/zkServer.sh startJMX enabled by defaultUsing config: /usr/local/zookeeper-3.4.5/bin/../conf/zoo.cfgStarting zookeeper ... jpSTARTED[hadoop@db02 hadoop-2.5.0]$ jps22296 QuorumPeerMain22320 Jps
[hadoop@db03 hadoop-2.5.0]$ ../zookeeper-3.4.5/bin/zkServer.sh startJMX enabled by defaultUsing config: /usr/local/zookeeper-3.4.5/bin/../conf/zoo.cfgStarting zookeeper ... STARTED[hadoop@db03 hadoop-2.5.0]$ jps17290 QuorumPeerMain17325 Jps
[hadoop@db04 hadoop-2.5.0]$ ../zookeeper-3.4.5/bin/zkServer.sh startJMX enabled by defaultUsing config: /usr/local/zookeeper-3.4.5/bin/../conf/zoo.cfgStarting zookeeper ... STARTED[hadoop@db04 hadoop-2.5.0]$ jps15908 Jps15877 QuorumPeerMain
[hadoop@db05 hadoop-2.5.0]$ ../zookeeper-3.4.5/bin/zkServer.sh startJMX enabled by defaultUsing config: /usr/local/zookeeper-3.4.5/bin/../conf/zoo.cfgStarting zookeeper ... STARTED[hadoop@db05 hadoop-2.5.0]$ jps23412 Jps23379 QuorumPeerMain
hadoop初始化zk：
[zk: localhost:2181(CONNECTED) 1] ls /[zookeeper]
[hadoop@db01 hadoop-2.5.0]$ bin/hdfs zkfc -formatZK
[zk: localhost:2181(CONNECTED) 3] ls /[hadoop-ha, zookeeper]
启动hdfs集群：
[hadoop@db01 hadoop-2.5.0]$ sbin/start-dfs.sh 17/03/12 13:19:36 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicableStarting namenodes on [db01 db02]db01: starting namenode, logging to /usr/local/hadoop-2.5.0/logs/hadoop-hadoop-namenode-db01.outdb02: starting namenode, logging to /usr/local/hadoop-2.5.0/logs/hadoop-hadoop-namenode-db02.outdb01: starting datanode, logging to /usr/local/hadoop-2.5.0/logs/hadoop-hadoop-datanode-db01.outdb05: starting datanode, logging to /usr/local/hadoop-2.5.0/logs/hadoop-hadoop-datanode-db05.outdb02: starting datanode, logging to /usr/local/hadoop-2.5.0/logs/hadoop-hadoop-datanode-db02.outdb04: starting datanode, logging to /usr/local/hadoop-2.5.0/logs/hadoop-hadoop-datanode-db04.outdb03: starting datanode, logging to /usr/local/hadoop-2.5.0/logs/hadoop-hadoop-datanode-db03.outStarting journal nodes [db01 db02 db03]db02: starting journalnode, logging to /usr/local/hadoop-2.5.0/logs/hadoop-hadoop-journalnode-db02.outdb01: starting journalnode, logging to /usr/local/hadoop-2.5.0/logs/hadoop-hadoop-journalnode-db01.outdb03: starting journalnode, logging to /usr/local/hadoop-2.5.0/logs/hadoop-hadoop-journalnode-db03.out17/03/12 13:19:53 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicableStarting ZK Failover Controllers on NN hosts [db01 db02]db02: starting zkfc, logging to /usr/local/hadoop-2.5.0/logs/hadoop-hadoop-zkfc-db02.outdb01: starting zkfc, logging to /usr/local/hadoop-2.5.0/logs/hadoop-hadoop-zkfc-db01.out[hadoop@db01 hadoop-2.5.0]$ jps8382 Jps7931 DataNode8125 JournalNode32156 QuorumPeerMain7816 NameNode8315 DFSZKFailoverController
测试自动故障转移功能：
[hadoop@db01 hadoop-2.5.0]$ bin/hdfs haadmin -getServiceState nn117/03/12 13:51:00 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicablestandby[hadoop@db01 hadoop-2.5.0]$ bin/hdfs haadmin -getServiceState nn217/03/12 13:51:04 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicableactive
[hadoop@db02 hadoop-2.5.0]$ jps22296 QuorumPeerMain22377 NameNode22458 DataNode22775 Jps22691 DFSZKFailoverController22553 JournalNode[hadoop@db02 hadoop-2.5.0]$ [hadoop@db02 hadoop-2.5.0]$
[hadoop@db01 hadoop-2.5.0]$ bin/hdfs haadmin -getServiceState nn117/03/12 14:23:47 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicablestandby[hadoop@db01 hadoop-2.5.0]$ bin/hdfs haadmin -getServiceState nn217/03/12 14:23:51 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicableactive[hadoop@db01 hadoop-2.5.0]$
[hadoop@db02 hadoop-2.5.0]$ kill -9 25121
[hadoop@db01 hadoop-2.5.0]$ bin/hdfs haadmin -getServiceState nn117/03/12 14:24:46 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicableactive[hadoop@db01 hadoop-2.5.0]$ bin/hdfs haadmin -getServiceState nn217/03/12 14:24:50 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable17/03/12 14:24:51 INFO ipc.Client: Retrying connect to server: db02/192.168.100.232:8020. Already tried 0 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=1, sleepTime=1000 MILLISECONDS)Operation failed: Call From db01/192.168.100.231 to db02:8020 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused
--------------------------------------------------------------------------------[hadoop@db01 hadoop-2.5.0]$ bin/hdfs haadmin -getServiceState nn117/03/12 14:28:24 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicableactive[hadoop@db01 hadoop-2.5.0]$ bin/hdfs haadmin -getServiceState nn217/03/12 14:28:27 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicablestandby[hadoop@db01 hadoop-2.5.0]$ jps16276 Jps15675 JournalNode15363 NameNode15871 DFSZKFailoverController10319 QuorumPeerMain15478 DataNode[hadoop@db01 hadoop-2.5.0]$ kill -9 15363[hadoop@db01 hadoop-2.5.0]$ [hadoop@db01 hadoop-2.5.0]$ bin/hdfs haadmin -getServiceState nn117/03/12 14:28:48 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable17/03/12 14:28:49 INFO ipc.Client: Retrying connect to server: db01/192.168.100.231:8020. Already tried 0 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=1, sleepTime=1000 MILLISECONDS)Operation failed: Call From db01/192.168.100.231 to db01:8020 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: hadoop-2.5.0]$ bin/hdfs haadmin -getServiceState nn217/03/12 14:28:54 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicableactive------------------------------------------------------------------------------------------------------
##############################zk ha自动切换可能遇到错误##############################################################
2017-03-12 13:58:54,210 WARN org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer: Unable to trigger a roll of the active NNjava.net.ConnectException: Call From db01/192.168.100.231 to db02:8020 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: 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:1415) at org.apache.hadoop.ipc.Client.call(Client.java:1364) at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:206) at com.sun.proxy.$Proxy16.rollEditLog(Unknown Source) at org.apache.hadoop.hdfs.protocolPB.NamenodeProtocolTranslatorPB.rollEditLog(NamenodeProtocolTranslatorPB.java:139) at org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer.triggerActiveLogRoll(EditLogTailer.java:271) at org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer.access$600(EditLogTailer.java:61) at org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTailerThread.doWork(EditLogTailer.java:313) at org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTailerThread.access$200(EditLogTailer.java:282) at org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTailerThread$1.run(EditLogTailer.java:299) at org.apache.hadoop.security.SecurityUtil.doAsLoginUserOrFatal(SecurityUtil.java:411) at org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTailerThread.run(EditLogTailer.java:295)Caused by: java.net.ConnectException: Connection refused at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:739) 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$Connection.setupConnection(Client.java:606) at org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:700) at org.apache.hadoop.ipc.Client$Connection.access$2800(Client.java:367) at org.apache.hadoop.ipc.Client.getConnection(Client.java:1463) at org.apache.hadoop.ipc.Client.call(Client.java:1382) ... 11 more
问题原因：
我的问题找到了 在 HDFS的配置文件中 我的 fencing的选的密钥文件不对，我的是 dsa 不是 rsa的加密类型。改一下就OK 了
##############################zk ha自动切换可能遇到错误##############################################################
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