Question

问题：Eclipse Hadoop插件问题（本地异常调用localhost / 127.0.0.1：50070失败：java.io.EOFException）。任何人都可以给我解决方案吗？

我正在进行Cloudera培训教程。其中使用Eclipse（Helios）3.6和Hadoop.0.20.2-cdh3u2版本。

我已经下载了hadoop-eclipse-plugin-0.20.3-SNAPSHOT.jar并将其复制到/ home / training / eclipse / plugins /文件夹中。

Run --> Eclipse --> gone to File (which is in Menu bar) --> New --> other

来自其他选择MapReduce项目。我选择了Specify Hadoop库位置。并将位置指定为“/ usr / lib / hadoop”。在这个位置，我有以下文件。

bin                                hadoop-examples-0.20.2-cdh3u2.jar
build.xml                          hadoop-examples.jar
CHANGES.txt                        hadoop-test-0.20.2-cdh3u2.jar
conf                               hadoop-test.jar
contrib                            hadoop-tools-0.20.2-cdh3u2.jar
example-confs                      hadoop-tools.jar
hadoop-0.20.2-cdh3u2-ant.jar       ivy
hadoop-0.20.2-cdh3u2-core.jar      ivy.xml
hadoop-0.20.2-cdh3u2-examples.jar  lib
hadoop-0.20.2-cdh3u2-test.jar      LICENSE.txt
hadoop-0.20.2-cdh3u2-tools.jar     logs
hadoop-ant-0.20.2-cdh3u2.jar       NOTICE.txt
hadoop-ant.jar                     pids
hadoop-core-0.20.2-cdh3u2.jar      README.txt
hadoop-core.jar                    webapps

并将Mpareduce项目命名为“myhadoop”并单击完成按钮。我在DFS Locations按钮上获得了Mapreduce按钮，但不是它的雇主。

消失并检查了我的dfs和mapred端口。

我的core-site.xml是

<configuration>
  <property>
    <name>fs.default.name</name>
    <value>hdfs://localhost:8020</value>
  </property>

我的mapred-site.xml

<configuration>
  <property>
    <name>mapred.job.tracker</name>
    <value>localhost:8021</value>
  </property>

在Map ReTo中定义了eclipse中的Hadoop位置，我给出了如下所示。

Map/Reduce Master
Host: localhost
port 50021

DFS Master:
Host :localhost
Port:50020

同样我选择使用M / R主机。

我已经运行了cloudera的示例wordcount程序，但它给了我以下问题。请给我解决方案，我试试2天。，....

Exception in thread "main" java.io.IOException: Call to localhost/127.0.0.1:50070 failed on local exception: java.io.EOFException
    at org.apache.hadoop.ipc.Client.wrapException(Client.java:1142)
    at org.apache.hadoop.ipc.Client.call(Client.java:1110)
    at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:226)
    at $Proxy0.getProtocolVersion(Unknown Source)
    at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:398)
    at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:384)
    at org.apache.hadoop.hdfs.DFSClient.createRPCNamenode(DFSClient.java:111)
    at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:213)
    at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:180)
    at org.apache.hadoop.hdfs.DistributedFileSystem.initialize(DistributedFileSystem.java:89)
    at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:1514)
    at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:67)
    at org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:1548)
    at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:1530)
    at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:228)
    at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:111)
    at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:212)
    at org.apache.hadoop.fs.Path.getFileSystem(Path.java:183)
    at org.apache.hadoop.mapreduce.lib.input.FileInputFormat.addInputPath(FileInputFormat.java:368)
    at WordCount.main(WordCount.java:65)
Caused by: java.io.EOFException
    at java.io.DataInputStream.readInt(DataInputStream.java:375)
    at org.apache.hadoop.ipc.Client$Connection.receiveResponse(Client.java:815)
    at org.apache.hadoop.ipc.Client$Connection.run(Client.java:724)

Answer 1

尝试将配置中的计算机名称从localhost更改为主机名

Eclipse Hadoop插件问题（调用localhost / 127.0.0.1:50070）任何机构都可以为我提供解决方案吗？

1 个答案: