hbase集群部分节点HRegionServer启动后自动关闭的问题

我有四个ＨRegionServer节点。发现输入./start-hbase.sh后，只启动了两个节点，而且后来两个节点又挂掉了。

查看日志：

more hbase-root-regionserver-heres01.log

报错如下：

2017-04-30 14:02:05,999 FATAL [regionserver60020] regionserver.HRegionServer: Master rejected startup because clock is out of syncorg.apache.hadoop.hbase.ClockOutOfSyncException: org.apache.hadoop.hbase.ClockOutOfSyncException: Server heres01,60020,1493532120370 has been rejected; Reported time is too far out of sync with master.  Time difference of 2421573ms > max allowed of 30000ms        at org.apache.hadoop.hbase.master.ServerManager.checkClockSkew(ServerManager.java:314)        at org.apache.hadoop.hbase.master.ServerManager.regionServerStartup(ServerManager.java:215)        at org.apache.hadoop.hbase.master.HMaster.regionServerStartup(HMaster.java:1292)        at org.apache.hadoop.hbase.protobuf.generated.RegionServerStatusProtos$RegionServerStatusService$2.callBlockingMethod(RegionServerStatusProtos.java:5085)        at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2185)        at org.apache.hadoop.hbase.ipc.RpcServer$Handler.run(RpcServer.java:1889)        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.ipc.RemoteException.instantiateException(RemoteException.java:106)        at org.apache.hadoop.ipc.RemoteException.unwrapRemoteException(RemoteException.java:95)        at org.apache.hadoop.hbase.protobuf.ProtobufUtil.getRemoteException(ProtobufUtil.java:277)        at org.apache.hadoop.hbase.regionserver.HRegionServer.reportForDuty(HRegionServer.java:1955)        at org.apache.hadoop.hbase.regionserver.HRegionServer.run(HRegionServer.java:794)        at java.lang.Thread.run(Thread.java:745)Caused by: org.apache.hadoop.hbase.ipc.RemoteWithExtrasException(org.apache.hadoop.hbase.ClockOutOfSyncException): org.apache.hadoop.hbase.ClockOutOfSyncException: Server heres01,60020,1493532120370 has been rejected; Reported time is too far out of sync with master.  Time difference of 2421573ms > max allowed of 30000ms        at org.apache.hadoop.hbase.master.ServerManager.checkClockSkew(ServerManager.java:314)        at org.apache.hadoop.hbase.master.ServerManager.regionServerStartup(ServerManager.java:215)        at org.apache.hadoop.hbase.master.HMaster.regionServerStartup(HMaster.java:1292)        at org.apache.hadoop.hbase.protobuf.generated.RegionServerStatusProtos$RegionServerStatusService$2.callBlockingMethod(RegionServerStatusProtos.java:5085)        at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2185)        at org.apache.hadoop.hbase.ipc.RpcServer$Handler.run(RpcServer.java:1889)        at org.apache.hadoop.hbase.ipc.RpcClient.call(RpcClient.java:1454)        at org.apache.hadoop.hbase.ipc.RpcClient.callBlockingMethod(RpcClient.java:1658)        at org.apache.hadoop.hbase.ipc.RpcClient$BlockingRpcChannelImplementation.callBlockingMethod(RpcClient.java:1716)        at org.apache.hadoop.hbase.protobuf.generated.RegionServerStatusProtos$RegionServerStatusService$BlockingStub.regionServerStartup(RegionServerStatusProtos.java:5402)        at org.apache.hadoop.hbase.regionserver.HRegionServer.reportForDuty(HRegionServer.java:1953)        ... 2 more

网上查找到原因：系统时间不同步的。

1）在hbase-site.xml文件中 修改增加 ，将时间改大点
<property>
<name>hbase.master.maxclockskew</name>
<value>150000</value>
</property>
2）修改系统时间，将时间改为一致（建议采用本方法）：
修改日期
date -s 11/23/2013
修改时间
date -s 15:14:00
检查硬件（CMOS）时间
clock -r
这个修改在系统重启后就失效了，因此为了将这个时间永久生效，需要将修改的时间写入CMOS。
clock -w

3）修改完成后单独启动HRegionServer节点即可：
启动集群中所有的regionserver
./hbase-daemons.sh start regionserver
启动某个regionserver
./hbase-daemon.sh start regionserver

如果想通过游览器游览：http://192.168.2.110:60010,需要重新停启hbase。