Zamknięcie serwera Hbase Region

Question

Jestem Mohanselvakumar i jestem nowy w systemie Hbase, prosząc o pomoc w następujących sprawach z jednym z serwerów hbase.

Scenariusz to zbiór 10 węzłów węzłów z 2 węzłami nazw (jeden podstawowy i drugi zapasowy).

Na 10 węzłach korzystam z usługi Datanode oraz usługi Regionserver na wszystkich węzłach.

Teraz problem dotyczy 10 węzłów, jeden z węzłów ciągle ulega awarii z powodu następującego wyjątku;

Frequent Error No:01 

2013-01-25 12:10:51,918 FATAL org.apache.hadoop.hbase.regionserver.HRegionServer: ABORTING region server serverName=DC1AuthDFSC1D1.cidr.gov.in,6020,1359093222948, load=(requests=10, regions=876, usedHeap=1925, maxHeap=11897): regionserver:6020-0x3c13d364d92db2-0x3c13d364d92db2 regionserver:6020-0x3c13d364d92db2-0x3c13d364d92db2 received expired from ZooKeeper, aborting 
org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired 
    at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.connectionEvent(ZooKeeperWatcher.java:328) 
    at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:246) 
    at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:530) 
    at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:506) 
2013-01-25 12:10:51,931 INFO org.apache.hadoop.hbase.regionserver.HRegionServer: Dump of metrics: request=0.0, regions=876, stores=992, storefiles=2380, storefileIndexSize=769, memstoreSize=19, compactionQueueSize=0, flushQueueSize=0, usedHeap=2043, maxHeap=11897, blockCacheSize=808359784, blockCacheFree=1686753176, blockCacheCount=11005, blockCacheHitCount=80692, blockCacheMissCount=149039, blockCacheEvictedCount=0, blockCacheHitRatio=35, blockCacheHitCachingRatio=87 
2013-01-25 12:10:51,931 INFO org.apache.hadoop.hbase.regionserver.HRegionServer: STOPPED: regionserver:6020-0x3c13d364d92db2-0x3c13d364d92db2 regionserver:6020-0x3c13d364d92db2-0x3c13d364d92db2 received expired from ZooKeeper, aborting 
2013-01-25 12:10:51,932 INFO org.apache.zookeeper.ClientCnxn: EventThread shut down 
2013-01-25 12:10:54,703 INFO org.apache.hadoop.hbase.regionserver.LogRoller: LogRoller exiting. 
2013-01-25 12:10:58,660 INFO org.apache.hadoop.hbase.regionserver.CompactSplitThread: regionserver6020.compactor exiting 
2013-01-25 12:11:00,866 INFO org.apache.hadoop.hbase.regionserver.MemStoreFlusher: regionserver6020.cacheFlusher exiting 
2013-01-25 12:11:02,647 INFO org.apache.hadoop.ipc.HBaseServer: Stopping server on 6020 
2013-01-25 12:11:02,648 INFO org.apache.hadoop.ipc.HBaseServer: IPC Server handler 0 on 6020: exiting 
2013-01-25 12:11:02,648 INFO org.apache.hadoop.ipc.HBaseServer: PRI IPC Server handler 5 on 6020: exiting 
2013-01-25 12:11:02,648 INFO org.apache.hadoop.ipc.HBaseServer: PRI IPC Server handler 3 on 6020: exiting 
2013-01-25 12:11:02,648 INFO org.apache.hadoop.ipc.HBaseServer: Stopping IPC Server listener on 6020 
2013-01-25 12:11:02,648 INFO org.apache.hadoop.ipc.HBaseServer: IPC Server handler 7 on 6020: exiting 
2013-01-25 12:11:02,648 INFO org.apache.hadoop.ipc.HBaseServer: PRI IPC Server handler 6 on 6020: exiting 
2013-01-25 12:11:02,648 INFO org.apache.hadoop.ipc.HBaseServer: IPC Server handler 5 on 6020: exiting 
2013-01-25 12:11:02,648 INFO org.apache.hadoop.ipc.HBaseServer: Stopping IPC Server Responder 
2013-01-25 12:11:02,649 INFO org.apache.hadoop.ipc.HBaseServer: IPC Server handler 3 on 6020: exiting 
2013-01-25 12:11:02,649 INFO org.apache.hadoop.ipc.HBaseServer: PRI IPC Server handler 0 on 6020: exiting 

---

Frequent Error No:02 

    2013-01-25 12:11:19,106 INFO org.apache.hadoop.hbase.regionserver.Leases: regionserver6020 closing leases 
    2013-01-25 12:11:19,106 INFO org.apache.hadoop.hbase.regionserver.Leases: regionserver6020 closed leases 
    2013-01-25 12:11:19,136 INFO org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation: Closed zookeeper sessionid=0x13c13d323792d99 
    2013-01-25 12:11:19,138 INFO org.apache.zookeeper.ZooKeeper: Session: 0x13c13d323792d99 closed 
    2013-01-25 12:11:19,138 INFO org.apache.zookeeper.ClientCnxn: EventThread shut down 
    2013-01-25 12:11:19,143 INFO org.apache.hadoop.hbase.regionserver.HRegionServer: regionserver6020 exiting 
    2013-01-25 12:11:19,152 INFO org.apache.hadoop.hbase.regionserver.ShutdownHook: Shutdown hook starting; hbase.shutdown.hook=true; fsShutdownHook=Thread[Thread-14,5,main] 
    2013-01-25 12:11:19,152 INFO org.apache.hadoop.hbase.regionserver.HRegionServer: STOPPED: Shutdown hook 
    2013-01-25 12:11:19,152 INFO org.apache.hadoop.hbase.regionserver.ShutdownHook: Starting fs shutdown hook thread. 
    2013-01-25 12:11:19,153 ERROR org.apache.hadoop.hdfs.DFSClient: Exception closing file 

Answer 1

Zookeeper ważności może się zdarzyć z powodu braku pamięci na węźle, GC, które są zbyt długie itd. Patrz punkt 12.9.2.7 here.

Answer 2

Możesz dodać limit czasu sesji w HBase-site.xml jak ten

 <property> 
     <name>zookeeper.session.timeout</name> 
     <value>60000</value> 
     </property> 

Hopping to pomóc