小编zxz*_*zxz的帖子

Apache Spark最近将版本更新为0.8.1,在该yarn-client模式下可用.我的问题是,纱线客户端模式究竟意味着什么？在文档中它说:

使用yarn-client模式,该应用程序将在本地启动.就像在Local/Mesos/Standalone模式下运行应用程序或spark-shell一样.启动方法也与它们类似,只需确保在需要指定主URL时,使用"yarn-client"代替

"本地推出"是什么意思？在哪里？在Spark集群上？
与纱线独立模式有什么区别？

我使用的版本是neo4j-enterprise-2.2.0-M02

我的问题是:如何在后端或浏览器中配置用户(如添加新用户,更改密码等)而不是REST API？我可以通过neo4j-shell来做吗？想象一下我是一名DBA,通过REST API做这件事并不是很方便.

任何帮助将不胜感激!

最近我开始使用hadoop.现在我想从远程主机访问hdfs,它没有安装hadoop-client,只是依赖于hadoop-client-2.0.4-alpha.jar.

但是当我尝试访问hdfs时,我得到以下异常:

java.io.IOException: Failed on local exception: com.google.protobuf.InvalidProtocolBufferException: Message missing required fields: callId, status; Host Details : local host is: "webserver/127.0.0.1"; destination host is: "222.333.111.77":8020;
        at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:761)
        at org.apache.hadoop.ipc.Client.call(Client.java:1239)
        at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:202)
        at $Proxy25.getFileInfo(Unknown Source)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:164)
        at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:83)
        at $Proxy25.getFileInfo(Unknown Source)
        at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.getFileInfo(ClientNamenodeProtocolTranslatorPB.java:630)
        at org.apache.hadoop.hdfs.DFSClient.getFileInfo(DFSClient.java:1559)
        at org.apache.hadoop.hdfs.DistributedFileSystem.getFileStatus(DistributedFileSystem.java:811)
        at org.apache.hadoop.fs.FileSystem.exists(FileSystem.java:1345)
        at com.kongming.kmdata.service.ExportService.copyToLocalFileFromHdfs(ExportService.java:60)
        at com.kongming.kmdata.service.KMReportManager.run(KMReportManager.java:105)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
        at java.util.concurrent.FutureTask.run(FutureTask.java:138)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:662)
Caused by: com.google.protobuf.InvalidProtocolBufferException: Message missing required …