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在执行hadoop mapreduce 作业时报错: 集群配置
Hadoop 2.8 with openjdk-9.
0002_000002. Got exception: org.apache.hadoop.security.AccessControlException: Unable to find SASL server implementation for DIGEST-MD5
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(java.base@9-internal/Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(java.base@9-internal/NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(java.base@9-internal/DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(java.base@9-internal/Constructor.java:453) at org.apache.hadoop.yarn.ipc.RPCUtil.instantiateException(RPCUtil.java:53) at org.apache.hadoop.yarn.ipc.RPCUtil.instantiateIOException(RPCUtil.java:80) at org.apache.hadoop.yarn.ipc.RPCUtil.unwrapAndThrowException(RPCUtil.java:119) at org.apache.hadoop.yarn.api.impl.pb.client.ContainerManagementProtocolPBClientImpl.startContainers(ContainerManagementProtocolPBClientImpl.java:109) at sun.reflect.NativeMethodAccessorImpl.invoke0(java.base@9-internal/Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(java.base@9-internal/NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(java.base@9-internal/DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(java.base@9-internal/Method.java:531) at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:398) at org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invokeMethod(RetryInvocationHandler.java:163) at org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invoke(RetryInvocationHandler.java:155) at org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invokeOnce(RetryInvocationHandler.java:95) at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:335) at com.sun.proxy.$Proxy87.startContainers(Unknown Source) at org.apache.hadoop.yarn.server.resourcemanager.amlauncher.AMLauncher.launch(AMLauncher.java:119) at org.apache.hadoop.yarn.server.resourcemanager.amlauncher.AMLauncher.run(AMLauncher.java:250) at java.util.concurrent.ThreadPoolExecutor.runWorker(java.base@9-internal/ThreadPoolExecutor.java:1158) at java.util.concurrent.ThreadPoolExecutor$Worker.run(java.base@9-internal/ThreadPoolExecutor.java:632) at java.lang.Thread.run(java.base@9-internal/Thread.java:804) Caused by: org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.security.AccessControlException): Unable to find SASL server implementation for DIGEST-MD5 at org.apache.hadoop.ipc.Client.getRpcResponse(Client.java:1481) at org.apache.hadoop.ipc.Client.call(Client.java:1427) at org.apache.hadoop.ipc.Client.call(Client.java:1337) at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:227) at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:116) at com.sun.proxy.$Proxy86.startContainers(Unknown Source) at org.apache.hadoop.yarn.api.impl.pb.client.ContainerManagementProtocolPBClientImpl.startContainers(ContainerManagementProtocolPBClientImpl.java:106) ... 15 more 百度一天没发现解决方法,在stackoverflow终于找到了解决答案,是JDK 版本的问题,与是否使用安全机制没有关系 问题链接:https://stackoverflow.com/questions/41185251/spark-hadoop-unable-to-find-sasl-server-implementation-for-digest-md5 我的问题:一开始配置安装了oracle的jdk 1.8,在安装hadoop 集群时,因为更新了一下软件,jdk版本使用ubuntu的版本openjdk-.1.9配,没有使用自己安装,一直保以上错误以上jdk是后来修改的,我自己安装的是后来将置到hadoop-env.sh成为后来的openjdk的路径,故造成以上错误.
解决方法: 修改自己已安装的JDK 版本 vi hadoop-env.sh export JAVA_HOME=/usr/java转载地址：http://wwnzb.baihongyu.com/