我已经将hadoop版本从1.0.4升级到2.2.0。mapreduce作业之前运行良好。现在我已经添加了几乎所有为hadoop2.2.0提供的jar。但它还是给了我一个例外。告诉我哪里做错了。
Exception in thread "main" java.lang.NoClassDefFoundError: com/google/protobuf/ServiceException
at org.apache.hadoop.ipc.ProtobufRpcEngine.<clinit>(ProtobufRpcEngine.java:69)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:270)
at org.apache.hadoop.conf.Configuration.getClassByNameOrNull(Configuration.java:1659)
at org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:1624)
at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:1718)
at org.apache.hadoop.ipc.RPC.getProtocolEngine(RPC.java:203)
at org.apache.hadoop.ipc.RPC.getProtocolProxy(RPC.java:537)
at org.apache.hadoop.hdfs.NameNodeProxies.createNNProxyWithClientProtocol(NameNodeProxies.java:328)
at org.apache.hadoop.hdfs.NameNodeProxies.createNonHAProxy(NameNodeProxies.java:235)
at org.apache.hadoop.hdfs.NameNodeProxies.createProxy(NameNodeProxies.java:139)
at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:510)
at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:453)
at org.apache.hadoop.hdfs.DistributedFileSystem.initialize(DistributedFileSystem.java:136)
at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:2433)
at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:88)
at org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:2467)
at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:2449)
at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:367)
at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:166)
Caused by: java.lang.ClassNotFoundException: com.google.protobuf.ServiceException
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)
提前谢谢。
1条答案
按热度按时间5n0oy7gb1#
请检查您的行李
protobuf
附属国。AfairHadoop2.x需要2.5.x(请检查你的HadoopDependencies),你可以选择一个过时的,因为一些外部组件。请注意:如果你的工作
org.apache.hadoop.mapreduce
它可能与hadoop2.x二进制不兼容。在这种情况下,应该重新编译。“旧”api不应该有这样的问题org.apache.hadoop.mapred
. 但我建议在任何情况下重新编译。希望这至少有帮助。