我正在尝试遵循kafka网站上的指南: https://kafka.apache.org/quickstart 但是当我使用kafka_2.12-2.5.0并尝试启动Zookeeper时,我得到了:
$ bin/zookeeper-server-start.sh config/zookeeper.properties
Exception in thread "main" java.lang.UnsupportedClassVersionError: org/apache/zookeeper/server/quorum/QuorumPeerMain : Unsupported major.minor version 52.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)
我正在使用redhat7.1。 试图更新Java:
$ sudo yum install java-1.8.0-openjdk-devel
Loaded plugins: langpacks, product-id, subscription-manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
...
Package 1:java-1.8.0-openjdk-devel-1.8.0.31-2.b13.el7.x86_64 already installed and latest version
Nothing to do
我应该拥有哪个Java版本?
答案 0 :(得分:0)
这个'52 .0'意味着它是使用1.8 jdk编译的,但是您主要是尝试使用较低的jdk(甚至是非常高的不兼容?)运行。 默认情况下使用JAVA_HOME环境变量,因此希望您已经检查了以下基础知识:java_home,java --version ...甚至在运行指向正确的32/64 java之前强制执行java_home导出