hadoop-0.20.2 & hbase-0.90.1 集群启动错误“org.apache.hadoop.ipc.RPC$VersionMismatch: Protocol org.apache.h...-优快云博客

本文详细介绍了遇到Hadoop-0.20.2与HBase-0.90.1版本不兼容导致的RPC版本不匹配问题，并提供了将HBase中使用到的Hadoop库更新至对应版本的解决方案，成功解决了Hadoop与HBase集群启动错误。

分类： NoSQL 2011-04-04 14:41 2214人阅读评论(0) 收藏举报

hadoop-0.20.2 & hbase-0.90.1集群启动错误问题解决：

问题如下：

org.apache.hadoop.ipc.RPC$VersionMismatch: Protocol org.apache.hadoop.hdfs.protocol.ClientProtocol version mismatch. (client = 42, server = 41)
        at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:364)
        at org.apache.hadoop.hdfs.DFSClient.createRPCNamenode(DFSClient.java:113)
        at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:215)
        at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:177)
        at org.apache.hadoop.hdfs.DistributedFileSystem.initialize(DistributedFileSystem.java:82)
        at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:1378)
        at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:66)
        at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:1390)
        at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:196)
        at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:95)
        at org.apache.hadoop.hbase.master.MasterFileSystem.<init>(MasterFileSystem.java:87)
        at org.apache.hadoop.hbase.master.HMaster.finishInitialization(HMaster.java:341)
        at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:277)
2011-01-21 00:14:41,550 INFO org.apache.hadoop.hbase.master.HMaster: Aborting

初步认为是hadoop-0.20.2 & hbase-0.90.1版本问题造成的，hbase-0.90.1/lib中hadoop-core-0.20-append-r1056497.jar使用的hadoop-core-0.20，因此将其替换为hadoop-0.20.2-core.jar即可