问题
[root@SudeepMangu bin]# ./cassandra -f
xss = -ea -javaagent:/home/sudeep/apache-cassandra-1.2.5-src/lib/jamm-0.2.5.jar -XX:+UseThreadPriorities -XX:ThreadPriorityPolicy=42 -Xms930M -Xmx930M -Xmn200M -XX:+HeapDumpOnOutOfMemoryError -Xss160k
Exception in thread "main" java.lang.NoClassDefFoundError: *org/apache/cassandra/service/CassandraDaemon* Caused by: java.lang.ClassNotFoundException: org.apache.cassandra.service.CassandraDaemon at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) Could not find the main class: org.apache.cassandra.service.CassandraDaemon. Program will exit.
回答1:
I'm betting you are starting the server under windows.
Exception in thread "main" java.lang.NoClassDefFoundError
You are getting this exception because you haven't set the CASSANDRA_HOME variable, so when you start the server you are trying to find the path to Cassandra but you cant, because that path is constructed using that environment variable.
Simply add the system variable:
setx CASSANDRA_HOME "C:\path\to\cassandra\" // Windows
export CASSANDRA_HOME=/path/to/cassandra/ // Unix
Just a heads up doing this in the cmd will require you to open a new prompt.You can also do it using the GUI approach in Windows.
回答2:
If you do not have an administrative privileges then you might want to add it to the cassandra.bat file as
set CASSANDRA_HOME="C:\Program Files\apache-cassandra-1.2.8"
来源：https://stackoverflow.com/questions/16851308/i-am-getting-this-error-when-i-am-starting-cassandra-server