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 sync
org.apache.hadoop.hbase.ClockOutOfSyncException: org.apache.hadoop.hbase.ClockOutOfSyncException: Server heres01,60020,1493532120370 has been rejected; Reported time i
s 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: Ser
ver 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。