构建 Storm 时 Zookeeper 的 ClassNotFoundException [英] ClassNotFoundException for Zookeeper while building Storm
本文介绍了构建 Storm 时 Zookeeper 的 ClassNotFoundException的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我是 Java 和 Storm 的新手，所以请原谅任何明显的错误.我正在尝试使用水槽连接器运行风暴但它因以下错误而崩溃:
I'm new to java and Storm so please forgive any obvious mistakes. I'm trying to run storm with a flume connector but It crashes with the following error:
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:297)
at java.lang.Thread.run(Thread.java:744)
Caused by: java.lang.ExceptionInInitializerError
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:270)
at clojure.lang.RT.loadClassForName(RT.java:2056)
at clojure.lang.RT.load(RT.java:419)
at clojure.lang.RT.load(RT.java:400)
at clojure.core$load$fn__4890.invoke(core.clj:5415)
at clojure.core$load.doInvoke(core.clj:5414)
at clojure.lang.RestFn.invoke(RestFn.java:408)
at clojure.core$load_one.invoke(core.clj:5227)
at clojure.core$load_lib.doInvoke(core.clj:5264)
at clojure.lang.RestFn.applyTo(RestFn.java:142)
at clojure.core$apply.invoke(core.clj:603)
at clojure.core$load_libs.doInvoke(core.clj:5302)
at clojure.lang.RestFn.applyTo(RestFn.java:137)
at clojure.core$apply.invoke(core.clj:603)
at clojure.core$require.doInvoke(core.clj:5381)
at clojure.lang.RestFn.invoke(RestFn.java:408)
at backtype.storm.cluster$loading__4784__auto__.invoke(cluster.clj:1)
at backtype.storm.cluster__init.load(Unknown Source)
at backtype.storm.cluster__init.<clinit>(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:270)
at clojure.lang.RT.loadClassForName(RT.java:2056)
at clojure.lang.RT.load(RT.java:419)
at clojure.lang.RT.load(RT.java:400)
at clojure.core$load$fn__4890.invoke(core.clj:5415)
at clojure.core$load.doInvoke(core.clj:5414)
at clojure.lang.RestFn.invoke(RestFn.java:408)
at clojure.core$load_one.invoke(core.clj:5227)
at clojure.core$load_lib.doInvoke(core.clj:5264)
at clojure.lang.RestFn.applyTo(RestFn.java:142)
at clojure.core$apply.invoke(core.clj:603)
at clojure.core$load_libs.doInvoke(core.clj:5302)
at clojure.lang.RestFn.applyTo(RestFn.java:137)
at clojure.core$apply.invoke(core.clj:603)
at clojure.core$require.doInvoke(core.clj:5381)
at clojure.lang.RestFn.invoke(RestFn.java:408)
at backtype.storm.daemon.nimbus__init.load(Unknown Source)
at backtype.storm.daemon.nimbus__init.<clinit>(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:270)
at clojure.lang.RT.loadClassForName(RT.java:2056)
at clojure.lang.RT.load(RT.java:419)
at clojure.lang.RT.load(RT.java:400)
at clojure.core$load$fn__4890.invoke(core.clj:5415)
at clojure.core$load.doInvoke(core.clj:5414)
at clojure.lang.RestFn.invoke(RestFn.java:408)
at clojure.core$load_one.invoke(core.clj:5227)
at clojure.core$load_lib.doInvoke(core.clj:5264)
at clojure.lang.RestFn.applyTo(RestFn.java:142)
at clojure.core$apply.invoke(core.clj:603)
at clojure.core$load_libs.doInvoke(core.clj:5302)
at clojure.lang.RestFn.applyTo(RestFn.java:137)
at clojure.core$apply.invoke(core.clj:603)
at clojure.core$require.doInvoke(core.clj:5381)
at clojure.lang.RestFn.invoke(RestFn.java:408)
at backtype.storm.testing$loading__4784__auto__.invoke(testing.clj:1)
at backtype.storm.testing__init.load(Unknown Source)
at backtype.storm.testing__init.<clinit>(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:270)
at clojure.lang.RT.loadClassForName(RT.java:2056)
at clojure.lang.RT.load(RT.java:419)
at clojure.lang.RT.load(RT.java:400)
at clojure.core$load$fn__4890.invoke(core.clj:5415)
at clojure.core$load.doInvoke(core.clj:5414)
at clojure.lang.RestFn.invoke(RestFn.java:408)
at clojure.core$load_one.invoke(core.clj:5227)
at clojure.core$load_lib.doInvoke(core.clj:5264)
at clojure.lang.RestFn.applyTo(RestFn.java:142)
at clojure.core$apply.invoke(core.clj:603)
at clojure.core$load_libs.doInvoke(core.clj:5302)
at clojure.lang.RestFn.applyTo(RestFn.java:137)
at clojure.core$apply.invoke(core.clj:605)
at clojure.core$use.doInvoke(core.clj:5392)
at clojure.lang.RestFn.invoke(RestFn.java:408)
at backtype.storm.LocalCluster$loading__4784__auto__.invoke(LocalCluster.clj:1)
at backtype.storm.LocalCluster__init.load(Unknown Source)
at backtype.storm.LocalCluster__init.<clinit>(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:270)
at clojure.lang.RT.loadClassForName(RT.java:2056)
at clojure.lang.RT.load(RT.java:419)
at clojure.lang.RT.load(RT.java:400)
at clojure.core$load$fn__4890.invoke(core.clj:5415)
at clojure.core$load.doInvoke(core.clj:5414)
at clojure.lang.RestFn.invoke(RestFn.java:408)
at clojure.lang.Var.invoke(Var.java:415)
at backtype.storm.LocalCluster.<clinit>(Unknown Source)
at com.storm.WordCountTopology.main(WordCountTopology.java:97)
... 6 more
Caused by: java.lang.ClassNotFoundException: org.apache.zookeeper.server.NIOServerCnxn$Factory
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:190)
at backtype.storm.zookeeper$loading__4784__auto__.invoke(zookeeper.clj:1)
at backtype.storm.zookeeper__init.load(Unknown Source)
at backtype.storm.zookeeper__init.<clinit>(Unknown Source)
... 96 more
我的pom文件
<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>com.storm</groupId>
<artifactId>my-storm</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<name>my-storm</name>
<url>http://maven.apache.org</url>
<properties>
<flume.version>1.3.0-cdh4.2.1</flume.version>
<hadoop.version>2.0.0-cdh4.2.1</hadoop.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<repositories>
<repository>
<id>clojars.org</id>
<url>http://clojars.org/repo</url>
</repository>
<repository>
<id>cdh-maven-repo</id>
<name>CDH Maven Repository</name>
<url>https://repository.cloudera.com/content/repositories/releases/</url>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>storm</groupId>
<artifactId>storm</artifactId>
<version>0.8.2</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.flume</groupId>
<artifactId>flume-ng-embedded-agent</artifactId>
<version>${flume.version}</version>
</dependency>
<dependency>
<groupId>org.apache.flume</groupId>
<artifactId>flume-ng-core</artifactId>
<version>${flume.version}</version>
<exclusions>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.flume</groupId>
<artifactId>flume-ng-configuration</artifactId>
<version>${flume.version}</version>
</dependency>
<dependency>
<groupId>org.apache.flume</groupId>
<artifactId>flume-ng-node</artifactId>
<version>${flume.version}</version>
</dependency>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-common</artifactId>
<version>${hadoop.version}</version>
</dependency>
<dependency>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
<version>3.4.5</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.5.8</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-release-plugin</artifactId>
<version>2.0-beta-9</version>
</plugin>
</plugins>
</build>
</project>
$uname -a :Linux 2.6.32-358.23.2.el6.x86_64 #1 SMP Thu Oct 17 10:27:22 CEST 2013 x86_64 x86_64 x86_64 GNU/Linux
$locate zookeeper
.m2/repository/org/apache/zookeeper/zookeeper/3.4.5-cdh4.2.1/zookeeper-3.4.5-cdh4.2.1.pom
你能解释一下我遗漏了什么吗?
Can you please explain what am I missing?
推荐答案
看来关键在这里:
Caused by: java.lang.ClassNotFoundException: org.apache.zookeeper.server.NIOServerCnxn$Factory
这似乎是由于使用了 zookeeper 的 3.4.5 版本造成的.您是否尝试过降级到 3.3.6 版本?
This seems caused by using the version 3.4.5 of zookeeper. Have you tried a downgrade to, maybe version 3.3.6?
branch-3.3 包含内部类 NIOServerCnxn$Factory 但 branch-3.4 有 NIOServerCnxnFactory 代替
The branch-3.3 contains that Inner Class NIOServerCnxn$Factory but the branch-3.4 has the NIOServerCnxnFactory instead
这篇关于构建 Storm 时 Zookeeper 的 ClassNotFoundException的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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