Hbase 启动失败htrace

    今天在安装Hbase-1.1.2，配置文件检查了很多次，没有任何问题，但是发现slave上的HRegionServer总是启动失败，后来查阅日志，错误信息如下:

  

2016-01-02 20:15:53,145 INFO  [regionserver/slave6/10.72.51.199:16020] regionserver.HRegionServer: STOPPED: Failed initialization2016-01-02 20:15:53,146 ERROR [regionserver/slave6/10.72.51.199:16020] regionserver.HRegionServer: Failed initjava.lang.NoClassDefFoundError: org/htrace/Trace        at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:214)        at com.sun.proxy.$Proxy19.getFileInfo(Unknown Source)        at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.getFileInfo(ClientNamenodeProtocolTranslatorPB.java:752)        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)        at java.lang.reflect.Method.invoke(Method.java:606)        at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:187)        at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102)        at com.sun.proxy.$Proxy20.getFileInfo(Unknown Source)        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)        at java.lang.reflect.Method.invoke(Method.java:606)        at org.apache.hadoop.hbase.fs.HFileSystem$1.invoke(HFileSystem.java:279)        at com.sun.proxy.$Proxy21.getFileInfo(Unknown Source)        at org.apache.hadoop.hdfs.DFSClient.getFileInfo(DFSClient.java:1988)        at org.apache.hadoop.hdfs.DistributedFileSystem$18.doCall(DistributedFileSystem.java:1118)        at org.apache.hadoop.hdfs.DistributedFileSystem$18.doCall(DistributedFileSystem.java:1114)        at org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)        at org.apache.hadoop.hdfs.DistributedFileSystem.getFileStatus(DistributedFileSystem.java:1114)        at org.apache.hadoop.fs.FilterFileSystem.getFileStatus(FilterFileSystem.java:409)        at org.apache.hadoop.fs.FileSystem.exists(FileSystem.java:1400)        at org.apache.hadoop.hbase.regionserver.HRegionServer.setupWALAndReplication(HRegionServer.java:1606)        at org.apache.hadoop.hbase.regionserver.HRegionServer.handleReportForDutyResponse(HRegionServer.java:1362)        at org.apache.hadoop.hbase.regionserver.HRegionServer.run(HRegionServer.java:899)        at java.lang.Thread.run(Thread.java:745)Caused by: java.lang.ClassNotFoundException: org.htrace.Trace        at java.net.URLClassLoader$1.run(URLClassLoader.java:366)        at java.net.URLClassLoader$1.run(URLClassLoader.java:355)        at java.security.AccessController.doPrivileged(Native Method)        at java.net.URLClassLoader.findClass(URLClassLoader.java:354)        at java.lang.ClassLoader.loadClass(ClassLoader.java:425)        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)        at java.lang.ClassLoader.loadClass(ClassLoader.java:358)

   通过查阅资料，发现原来是htrace-core相关的jar包，解决方法是:

     将$HADOOP_HOME/share/hadoop/common/lib下的htrace-core-3.0.4.jar复制到$HBASE_HOME/lib下  

   其实我检查$HBASE/lib目录下，发现已经有一个htrace相关的包:htrace-core-3.1.0-incubating.jar ，不知什么原因，貌似这一个包加载失败了，在此备备注一下！