Hbase HMaster启动问题

一、启动HBase

      在Namenode节点上执行start-hbase.sh后，HMaster启动了，但是过几秒钟就挂了，

      查看日志报错：

    [master:master:60000] catalog.CatalogTracker: Failed verification of hbase:meta,,1 at address=node3,60020,1409104234032, exception=org.apache.hadoop.hbase.NotServingRegionException: org.apache.hadoop.hbase.NotServingRegionException: Region hbase:meta,,1 is not online

        at org.apache.hadoop.hbase.regionserver.HRegionServer.getRegionByEncodedName(HRegionServer.java:2612)

        at org.apache.hadoop.hbase.regionserver.HRegionServer.getRegion(HRegionServer.java:4003)

        at org.apache.hadoop.hbase.regionserver.HRegionServer.getRegionInfo(HRegionServer.java:3395)

        at org.apache.hadoop.hbase.protobuf.generated.AdminProtos$AdminService$2.callBlockingMethod(AdminProtos.java:20036)

        at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2185)

        at org.apache.hadoop.hbase.ipc.RpcServer$Handler.run(RpcServer.java:1889)

 master.HMaster: Unhandled exception. Starting shutdown.

org.apache.hadoop.hbase.TableExistsException: hbase:namespace

        at org.apache.hadoop.hbase.master.handler.CreateTableHandler.prepare(CreateTableHandler.java:120)

        at org.apache.hadoop.hbase.master.TableNamespaceManager.createNamespaceTable(TableNamespaceManager.java:230)

        at org.apache.hadoop.hbase.master.TableNamespaceManager.start(TableNamespaceManager.java:85)

        at org.apache.hadoop.hbase.master.HMaster.initNamespace(HMaster.java:1060)

        at org.apache.hadoop.hbase.master.HMaster.finishInitialization(HMaster.java:921)

        at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:607)

        at java.lang.Thread.run(Thread.java:745)

[main-EventThread] wal.HLogSplitter: Archived processed log hdfs://master:9000/hbase/WALs/node4,60020,1409104233517-splitting/node4%2C60020%2C1409104233517.1409104239901 to hdfs://master:9000/hbase/oldWALs/node4%2C60020%2C1409104233517.1409104239901

2014-08-27 13:44:30,805 WARN  [MASTER_SERVER_OPERATIONS-master:60000-1] master.SplitLogManager: Stopped while waiting for log splits to be completed

2014-08-27 13:44:30,806 WARN  [MASTER_SERVER_OPERATIONS-master:60000-1] master.SplitLogManager: error while splitting logs in [hdfs://master:9000/hbase/WALs/node1,60020,1409104233856-splitting] installed = 1 but only 0 done

java.io.IOException: failed log splitting for node1,60020,1409104233856, will retry

        at org.apache.hadoop.hbase.master.handler.ServerShutdownHandler.resubmit(ServerShutdownHandler.java:326)

        at org.apache.hadoop.hbase.master.handler.ServerShutdownHandler.process(ServerShutdownHandler.java:206)

        at org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:128)

        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:745)

Caused by: java.io.IOException: error or interrupted while splitting logs in [hdfs://master:9000/hbase/WALs/node1,60020,1409104233856-splitting] Task = installed = 1 done = 0 error = 0

        at org.apache.hadoop.hbase.master.SplitLogManager.splitLogDistributed(SplitLogManager.java:362)

        at org.apache.hadoop.hbase.master.MasterFileSystem.splitLog(MasterFileSystem.java:409)

        at org.apache.hadoop.hbase.master.MasterFileSystem.splitLog(MasterFileSystem.java:383)

        at org.apache.hadoop.hbase.master.MasterFileSystem.splitLog(MasterFileSystem.java:281)

        at org.apache.hadoop.hbase.master.handler.ServerShutdownHandler.process(ServerShutdownHandler.java:199)

        ... 4 more

2014-08-27 13:44:30,808 INFO  [main-EventThread] master.SplitLogManager: Done splitting /hbase/splitWAL/WALs%2Fnode4%2C60020%2C1409104233517-splitting%2Fnode4%252C60020%252C1409104233517.1409104239901

2014-08-27 13:44:30,807 ERROR [MASTER_SERVER_OPERATIONS-master:60000-4] executor.EventHandler: Caught throwable while processing event M_SERVER_SHUTDOWN

java.io.IOException: Server is stopped

        at org.apache.hadoop.hbase.master.handler.ServerShutdownHandler.process(ServerShutdownHandler.java:187)

        at org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:128)

        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:745)

2014-08-27 13:44:30,817 ERROR [MASTER_SERVER_OPERATIONS-master:60000-2] executor.EventHandler: Caught throwable while processing event M_SERVER_SHUTDOWN

java.io.IOException: failed log splitting for node3,60020,1409104234032, will retry

        at org.apache.hadoop.hbase.master.handler.ServerShutdownHandler.resubmit(ServerShutdownHandler.java:326)

        at org.apache.hadoop.hbase.master.handler.ServerShutdownHandler.process(ServerShutdownHandler.java:206)

        at org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:128)

        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:745)

Caused by: java.io.IOException: error or interrupted while splitting logs in [hdfs://master:9000/hbase/WALs/node3,60020,1409104234032-splitting] Task = installed = 1 done = 0 error = 0

        at org.apache.hadoop.hbase.master.SplitLogManager.splitLogDistributed(SplitLogManager.java:362)

        at org.apache.hadoop.hbase.master.MasterFileSystem.splitLog(MasterFileSystem.java:409)

        at org.apache.hadoop.hbase.master.MasterFileSystem.splitLog(MasterFileSystem.java:383)

        at org.apache.hadoop.hbase.master.MasterFileSystem.splitLog(MasterFileSystem.java:281)

        at org.apache.hadoop.hbase.master.handler.ServerShutdownHandler.process(ServerShutdownHandler.java:199)

        ... 4 more

2014-08-27 13:44:30,817 DEBUG [MASTER_SERVER_OPERATIONS-master:60000-0] master.DeadServer: Finished processing node3,60020,1409104234032

2014-08-27 13:44:30,818 ERROR [MASTER_SERVER_OPERATIONS-master:60000-0] executor.EventHandler: Caught throwable while processing event M_SERVER_SHUTDOWN

java.io.IOException: Server is stopped

        at org.apache.hadoop.hbase.master.handler.ServerShutdownHandler.process(ServerShutdownHandler.java:187)

        at org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:128)

        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:745)

2014-08-27 13:44:30,859 INFO  [main-EventThread] master.SplitLogManager: task /hbase/splitWAL/WALs%2Fnode1%2C60020%2C1409104233856-splitting%2Fnode1%252C60020%252C1409104233856.1409104237844 entered state: DONE node3,60020,1409118244326

2014-08-27 13:44:31,001 ERROR [main] master.HMasterCommandLine: Master exiting

java.lang.RuntimeException: HMaster Aborted

        at org.apache.hadoop.hbase.master.HMasterCommandLine.startMaster(HMasterCommandLine.java:192)

        at org.apache.hadoop.hbase.master.HMasterCommandLine.run(HMasterCommandLine.java:134)

        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)

        at org.apache.hadoop.hbase.util.ServerCommandLine.doMain(ServerCommandLine.java:126)

        at org.apache.hadoop.hbase.master.HMaster.main(HMaster.java:2799)

解决办法：

1.系统防火墙开启后主机ip对应主机名解析有问题,需要删除Hbase 的tmp文件夹重启（每个节点都要操作）

   将/etc/hosts中的127.0.0.1 psyDebian删除（从节点对应也删除）后程序运行正常。接着尝试运行HBase，没有出现问题！创建表也正常了！

    一开始也知道得删除hosts文件中127.0.1.1，但是没想到127.0.0.1 主机名也得删除。

2.hadoop 集群进入了safe model 模式，需要执行hadoop dfsadmin -safemode leave退出安全模式

3.存储在Hbase的数据有丢失，需要利用hadoop的回收站的机制恢复数据，或者删除HBase的数据

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