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https://issues.apache.org/jira/browse/HADOOP-17533?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17286088#comment-17286088
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Kihwal Lee commented on HADOOP-17533:
-------------------------------------
rpc v.4 is an ancient tung only spoken by very old hadoop versions. One of the
artifacts (kafka?) must include an older hadoop.
BTW, jira is for reporting bugs. Please use relevant mailing lists for usage
questions and issues.
> Server IPC version 9 cannot communicate with client version 4
> -------------------------------------------------------------
>
> Key: HADOOP-17533
> URL: https://issues.apache.org/jira/browse/HADOOP-17533
> Project: Hadoop Common
> Issue Type: Bug
> Reporter: Mariia
> Priority: Major
> Labels: hadoop, hdfs, java, maven
>
> `I want to connect to hdfs using java jast like this
> _String url = "hdfs://c7301.ambari.apache.org:8020/file.txt";_
> _FileSystem fs = null;_
> _InputStream in = null;_
> _try {_
> _Configuration conf = new Configuration();_
> _fs = FileSystem.get(URI.create(url), conf, "admin");_
> _in = fs.open(new Path(url));_
> _IOUtils.copyBytes(in, System.out, 4096, false);_
> _} catch (Exception e) {_
> _e.printStackTrace();_
> _} finally {_
> _IOUtils.closeStream(fs);_
> _}_
> *Error that i got*
> [2021-02-17 20:02:06,115] ERROR PriviledgedActionException as:admin
> cause:org.apache.hadoop.ipc.RemoteException: *Server IPC version 9 cannot
> communicate with* *client version 4
> (*org.apache.hadoop.security.UserGroupInformation:1124)
> org.apache.hadoop.ipc.RemoteException: *Server IPC version 9 cannot
> communicate with client version 4*
> at org.apache.hadoop.ipc.Client.call(Client.java:1070)
> at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:225)
> at com.sun.proxy.$Proxy4.getProtocolVersion(Unknown Source)
> at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:396)
> at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:379)
> at org.apache.hadoop.hdfs.DFSClient.createRPCNamenode(DFSClient.java:119)
> at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:238)
> at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:203)
> at
> org.apache.hadoop.hdfs.DistributedFileSystem.initialize(DistributedFileSystem.java:89)
> at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:1386)
> at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:66)
> at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:1404)
> at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:254)
> at org.apache.hadoop.fs.FileSystem$1.run(FileSystem.java:117)
> at org.apache.hadoop.fs.FileSystem$1.run(FileSystem.java:115)
> at java.base/java.security.AccessController.doPrivileged(Native Method)
> at java.base/javax.security.auth.Subject.doAs(Subject.java:423)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1121)
> at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:115)
> at Main.main(Main.java:38)
> \{{ I tried different solutions to the problem, but nothing helped. }}
> *Its my pom.xml file*
>
> <?xml version="1.0" encoding="UTF-8"?>
> <project xmlns="http://maven.apache.org/POM/4.0.0";
> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
> xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
> [http://maven.apache.org/xsd/maven-4.0.0.xsd]";>
> <modelVersion>4.0.0</modelVersion>
> <groupId>org.example</groupId>
> <artifactId>producer</artifactId>
> <version>1.0-SNAPSHOT</version>
> <properties>
> <maven.compiler.source>11</maven.compiler.source>
> <maven.compiler.target>11</maven.compiler.target>
> </properties>
> <dependencies>
> <dependency>
> <groupId>org.apache.kafka</groupId>
> <artifactId>kafka-clients</artifactId>
> <version>0.10.0.0</version>
> </dependency>
> <dependency>
> <groupId>org.apache.hadoop</groupId>
> <artifactId>hadoop-common</artifactId>
> <version>3.2.0</version>
> </dependency>
> <dependency>
> <groupId>org.apache.hadoop</groupId>
> <artifactId>hadoop-hdfs</artifactId>
> <version>3.2.0</version>
> </dependency>
> <dependency>
> <groupId>org.apache.hadoop</groupId>
> <artifactId>hadoop-yarn-common</artifactId>
> <version>3.2.0</version>
> </dependency>
> <dependency>
> <groupId>org.apache.hadoop</groupId>
> <artifactId>hadoop-mapreduce-client-common</artifactId>
> <version>3.2.0</version>
> </dependency>
> <dependency>
> <groupId>org.apache.hadoop</groupId>
> <artifactId>hadoop-mapreduce-client-core</artifactId>
> <version>3.2.0</version>
> </dependency>
> </dependencies>
> <build>
> <plugins>
> <plugin>
> <groupId>org.apache.maven.plugins</groupId>
> <artifactId>maven-shade-plugin</artifactId>
> <version>3.2.4</version>
> <executions>
> <execution>
> <phase>package</phase>
> <goals>
> <goal>shade</goal>
> </goals>
> <configuration>
> <transformers>
> <transformer
>
> implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
> <mainClass>Main</mainClass>
> </transformer>
> </transformers>
> </configuration>
> </execution>
> </executions>
> </plugin>
> </plugins>
> </build>
> </project>
> \{{}}
> *And its version of hdfs*
> Hadoop 3.1.1.3.1.4.0-315 Source code repository
> [email protected]:hortonworks/hadoop.git -r
> 58d0fd3d8ce58b10149da3c717c45e5e57a60d14 Compiled by jenkins on
> 2019-08-23T05:15Z Compiled with protoc 2.5.0 From source with checksum
> fcbd146ffa6d48fef0ed81332f9d6f0 This command was run using
> /usr/ddp/3.1.4.0-315/hadoop/hadoop-common-3.1.1.3.1.4.0-315.jar
>
> if someone knew a similar problem, please help
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