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今天装hbase 伪分布式的时候,出现了一个错误
2019-03-19 21:21:22,920 ERROR [main] regionserver.HRegionServer: Failed construction RegionServer
java.lang.NoClassDefFoundError: org/apache/htrace/SamplerBuilder
at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:644)
at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:628)
at org.apache.hadoop.hdfs.DistributedFileSystem.initialize(DistributedFileSystem.java:149)
at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:2667)
at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:93)
at org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:2701)
at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:2683)
at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:372)
at org.apache.hadoop.fs.Path.getFileSystem(Path.java:295)
at org.apache.hadoop.hbase.util.CommonFSUtils.getRootDir(CommonFSUtils.java:362)
at org.apache.hadoop.hbase.util.CommonFSUtils.isValidWALRootDir(CommonFSUtils.java:411)
at org.apache.hadoop.hbase.util.CommonFSUtils.getWALRootDir(CommonFSUtils.java:387)
at org.apache.hadoop.hbase.regionserver.HRegionServer.initializeFileSystem(HRegionServer.java:704)
at org.apache.hadoop.hbase.regionserver.HRegionServer.<init>(HRegionServer.java:613)
at org.apache.hadoop.hbase.master.HMaster.<init>(HMaster.java:489)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.apache.hadoop.hbase.master.HMaster.constructMaster(HMaster.java:3093)
at org.apache.hadoop.hbase.master.HMasterCommandLine.startMaster(HMasterCommandLine.java:236)
at org.apache.hadoop.hbase.master.HMasterCommandLine.run(HMasterCommandLine.java:140)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
at org.apache.hadoop.hbase.util.ServerCommandLine.doMain(ServerCommandLine.java:149)
at org.apache.hadoop.hbase.master.HMaster.main(HMaster.java:3111)
Caused by: java.lang.ClassNotFoundException: org.apache.htrace.SamplerBuilder
at java.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 25 more
2019-03-19 21:21:22,921 ERROR [main] master.HMasterCommandLine: Master exiting
java.lang.RuntimeException: Failed construction of Master: class org.apache.hadoop.hbase.master.HMaster.
at org.apache.hadoop.hbase.master.HMaster.constructMaster(HMaster.java:3100)
at org.apache.hadoop.hbase.master.HMasterCommandLine.startMaster(HMasterCommandLine.java:236)
at org.apache.hadoop.hbase.master.HMasterCommandLine.run(HMasterCommandLine.java:140)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
at org.apache.hadoop.hbase.util.ServerCommandLine.doMain(ServerCommandLine.java:149)
at org.apache.hadoop.hbase.master.HMaster.main(HMaster.java:3111)
Caused by: java.lang.NoClassDefFoundError: org/apache/htrace/SamplerBuilder
at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:644)
at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:628)
at org.apache.hadoop.hdfs.DistributedFileSystem.initialize(DistributedFileSystem.java:149)
at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:2667)
at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:93)
at org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:2701)
at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:2683)
at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:372)
at org.apache.hadoop.fs.Path.getFileSystem(Path.java:295)
at org.apache.hadoop.hbase.util.CommonFSUtils.getRootDir(CommonFSUtils.java:362)
at org.apache.hadoop.hbase.util.CommonFSUtils.isValidWALRootDir(CommonFSUtils.java:411)
at org.apache.hadoop.hbase.util.CommonFSUtils.getWALRootDir(CommonFSUtils.java:387)
at org.apache.hadoop.hbase.regionserver.HRegionServer.initializeFileSystem(HRegionServer.java:704)
at org.apache.hadoop.hbase.regionserver.HRegionServer.<init>(HRegionServer.java:613)
at org.apache.hadoop.hbase.master.HMaster.<init>(HMaster.java:489)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.apache.hadoop.hbase.master.HMaster.constructMaster(HMaster.java:3093)
... 5 more
Caused by: java.lang.ClassNotFoundException: org.apache.htrace.SamplerBuilder
at java.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 25 more
解决方案:
把/hbase-2.1.2/lib/client-facing-thirdparty
目录下的htrace-core-3.1.0-incubating.jar
复制到/hbase-2.1.2/lib
即可。
我觉得是hbase寻找这个类的时候直接在 /hbase-2.1.2/lib 下寻找,发现找不到,所以调用这个构造函数的时候无法生成RegionServer对象。就抛出了异常。所以就把htrace-core-3.1.0-incubating.jar
这个包放到/hbase-2.1.2/lib这里就可以解决了。只是个人猜想。
本文标签: 解决方案failedconstructionregionserver
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