安装gitblit后启动执行
sudo java -jar gitblit.jar --baseFolder data
就会报错误，Error: A JNI error has occurred, please check your installation and try again，网上一堆都是说，java和javac版本不一样，
但是是我的版本一样还是报这个错误，到底问题出在哪里呢？？
[root@iZwz91ua0udzue2cvh1m18Z ~]# java -verison
Unrecognized option: -verison
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.
[root@iZwz91ua0udzue2cvh1m18Z ~]# java -version
java version "1.8.0_202"
Java(TM) SE Runtime Environment (build 1.8.0_202-b08)
Java HotSpot(TM) 64-Bit Server VM (build 25.202-b08, mixed mode)
[root@iZwz91ua0udzue2cvh1m18Z ~]# javac -version
javac 1.8.0_202
[root@iZwz91ua0udzue2cvh1m18Z ~]# cd /opt/gitblit
[root@iZwz91ua0udzue2cvh1m18Z gitblit]# java -jar gitblit.jar
Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" java.lang.NoClassDefFoundError: org/kohsuke/args4j/CmdLineException
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
at java.lang.Class.privateGetMethodRecursive(Class.java:3048)
at java.lang.Class.getMethod0(Class.java:3018)
at java.lang.Class.getMethod(Class.java:1784)
at sun.launcher.LauncherHelper.validateMainClass(LauncherHelper.java:544)
at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:526)
Caused by: java.lang.ClassNotFoundException: org.kohsuke.args4j.CmdLineException
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 7 more
出现这个问题是因为jdk与gitblit版本不兼容。