启动Hadoop HDFS时的“Incompatible clusterIDs”错误原因分析
Hadoop HDFS时的“Incompatible clusterIDs”错误原因分析.pdf “IncompatibleclusterIDs”的错误原因是在执行“hdfsnamenode-format”之前,没有清空DataNode节点的data目录。 网上一些文章和帖子说是tmp目录,它本身也是没问题的,但Hadoop2.4.0是data目录,实际上这个信息已经由日志的“/data/hadoop/hadoop-2.4.0/data”指出,所以不能死死的参照网上的解决办法,遇到问题时多仔细观察。 从上述描述不难看出,解决办法就是清空所有DataNode的data目录,但注意不要将data目录本身给删除了。 data目录由core-site.xml文件中的属性“dfs.datanode.data.dir”指定。 2014-04-1719:30:33,075INFOorg.apache.hadoop.hdfs.server.common.Storage:Lockon/data/hadoop/hadoop-2.4.0/data/in_use.lockacquiredbynodename28326@localhost 2014-04-1719:30:33,078FATALorg.apache.hadoop.hdfs.server.datanode.DataNode:InitializationfailedforblockpoolBlockpool(DatanodeUuidunassigned)serviceto/172.25.40.171:9001 java.io.IOException:IncompatibleclusterIDsin/data/hadoop/hadoop-2.4.0/data:namenodeclusterID=CID-50401d89-a33e-47bf-9d14-914d8f1c4862;datanodeclusterID=CID-153d6fcb-d037-4156-b63a-10d6be224091 atorg.apache.hadoop.hdfs.server.datanode.DataStorage.doTransition(DataStorage.java:472) atorg.apache.hadoop.hdfs.server.datanode.DataStorage.recoverTransitionRead(DataStorage.java:225) atorg.apache.hadoop.hdfs.server.datanode.DataStorage.recoverTransitionRead(DataStorage.java:249) atorg.apache.hadoop.hdfs.server.datanode.DataNode.initStorage(DataNode.java:929) atorg.apache.hadoop.hdfs.server.datanode.DataNode.initBlockPool(DataNode.java:900) atorg.apache.hadoop.hdfs.server.datanode.BPOfferService.verifyAndSetNamespaceInfo(BPOfferService.java:274) atorg.apache.hadoop.hdfs.server.datanode.BPServiceActor.connectToNNAndHandshake(BPServiceActor.java:220) atorg.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:815) atjava.lang.Thread.run(Thread.java:744) 2014-04-1719:30:33,081WARNorg.apache.hadoop.hdfs.server.datanode.DataNode:Endingblockpoolservicefor:Blockpool(DatanodeUuidunassigned)serviceto/172.25.40.171:9001 2014-04-1719:30:33,184WARNorg.apache.hadoop.hdfs.server.datanode.DataNode:BlockpoolIDneeded,butservicenotyetregisteredwithNN java.lang.Exception:trace atorg.apache.hadoop.hdfs.server.datanode.BPOfferService.getBlockPoolId(BPOfferService.java:143) atorg.apache.hadoop.hdfs.server.datanode.BlockPoolManager.remove(BlockPoolManager.java:91) atorg.apache.hadoop.hdfs.server.datanode.DataNode.shutdownBlockPool(DataNode.java:859) atorg.apache.hadoop.hdfs.server.datanode.BPOfferService.shutdownActor(BPOfferService.java:350) atorg.apache.hadoop.hdfs.server.datanode.BPServiceActor.cleanUp(BPServiceActor.java:619) atorg.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:837) atjava.lang.Thread.run(Thread.java:744) 2014-04-1719:30:33,184INFOorg.apache.hadoop.hdfs.server.datanode.DataNode:RemovedBlockpool(DatanodeUuidunassigned) 2014-04-1719:30:33,184WARNorg.apache.hadoop.hdfs.server.datanode.DataNode:BlockpoolIDneeded,butservicenotyetregisteredwithNN java.lang.Exception:trace atorg.apache.hadoop.hdfs.server.datanode.BPOfferService.getBlockPoolId(BPOfferService.java:143) atorg.apache.hadoop.hdfs.server.datanode.DataNode.shutdownBlockPool(DataNode.java:861) atorg.apache.hadoop.hdfs.server.datanode.BPOfferService.shutdownActor(BPOfferService.java:350) atorg.apache.hadoop.hdfs.server.datanode.BPServiceActor.cleanUp(BPServiceActor.java:619) atorg.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:837) atjava.lang.Thread.run(Thread.java:744) 2014-04-1719:30:35,185WARNorg.apache.hadoop.hdfs.server.datanode.DataNode:ExitingDatanode 2014-04-1719:30:35,187INFOorg.apache.hadoop.util.ExitUtil:Exitingwithstatus0 2014-04-1719:30:35,189INFOorg.apache.hadoop.hdfs.server.datanode.DataNode:SHUTDOWN_MSG: /************************************************************ SHUTDOWN_MSG:ShuttingdownDataNodeatlocalhost/127.0.0.1 ************************************************************/