研發(fā)環(huán)境下搭建了一套基于CDH5的大數據平臺。在重啟服務器后發(fā)現(xiàn)HBase組件啟動異常,如圖
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HBase Master 運行狀況不良 RegionServer運行狀況不良 所有的RegionServer角色全部停止,啟動時報錯。
查看角色日志
Master rejected startup because clock is out of sync org.apache.hadoop.hbase.ClockOutOfSyncException: org.apache.hadoop.hbase.ClockOutOfSyncException: Server bigdata-182.bigdata.com,60020,1480383610272 has been rejected; Reported time is too far out of sync with master. Time difference of 76489ms > max allowed of 30000ms at org.apache.hadoop.hbase.master.ServerManager.checkClockSkew(ServerManager.java:401) at org.apache.hadoop.hbase.master.ServerManager.regionServerStartup(ServerManager.java:267) at org.apache.hadoop.hbase.master.MasterRpcServices.regionServerStartup(MasterRpcServices.java:366) at org.apache.hadoop.hbase.protobuf.generated.RegionServerStatusProtos$RegionServerStatusService$2.callBlockingMethod(RegionServerStatusProtos.java:8615) at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2170) at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:109) at org.apache.hadoop.hbase.ipc.RpcExecutor.consumerLoop(RpcExecutor.java:133) at org.apache.hadoop.hbase.ipc.RpcExecutor$1.run(RpcExecutor.java:108) at java.lang.Thread.run(Thread.java:745) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:526) at org.apache.hadoop.ipc.RemoteException.instantiateException(RemoteException.java:106) at org.apache.hadoop.ipc.RemoteException.unwrapRemoteException(RemoteException.java:95) at org.apache.hadoop.hbase.protobuf.ProtobufUtil.getRemoteException(ProtobufUtil.java:327) at org.apache.hadoop.hbase.regionserver.HRegionServer.reportForDuty(HRegionServer.java:2297) at org.apache.hadoop.hbase.regionserver.HRegionServer.run(HRegionServer.java:914) at java.lang.Thread.run(Thread.java:745) Caused by: org.apache.hadoop.hbase.ipc.RemoteWithExtrasException(org.apache.hadoop.hbase.ClockOutOfSyncException): org.apache.hadoop.hbase.ClockOutOfSyncException: Server bigdata-182.bigdata.com,60020,1480383610272 has been rejected; Reported time is too far out of sync with master. Time difference of 76489ms > max allowed of 30000ms at org.apache.hadoop.hbase.master.ServerManager.checkClockSkew(ServerManager.java:401) at org.apache.hadoop.hbase.master.ServerManager.regionServerStartup(ServerManager.java:267) at org.apache.hadoop.hbase.master.MasterRpcServices.regionServerStartup(MasterRpcServices.java:366) at org.apache.hadoop.hbase.protobuf.generated.RegionServerStatusProtos$RegionServerStatusService$2.callBlockingMethod(RegionServerStatusProtos.java:8615) at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2170) at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:109) at org.apache.hadoop.hbase.ipc.RpcExecutor.consumerLoop(RpcExecutor.java:133) at org.apache.hadoop.hbase.ipc.RpcExecutor$1.run(RpcExecutor.java:108) at java.lang.Thread.run(Thread.java:745)
判斷可能是時間未同步導致,查看后臺時間發(fā)現(xiàn)master主機與其他節(jié)點主機相差1分鐘,重新同步時間后再次啟動HBase后問題解決。
建議將時間同步加入到定時任務中,每隔一段時間向時間服務器同步一次,防止因為集群節(jié)點時間不同步導致一些異常的問題。