Java. lang. OutOfMemoryError: Java heap space Solution

Java. lang. OutOfMemoryError: Java heap space exception may be caused by the JAVA stack setting being too small.

There are roughly two solutions based on the answers on the Internet:

1. Add set JAVA_OPTS =-Xms200m-Xmx512m at the beginning of D:/apache-tomcat-6.0.18/bin/catalina. bat.

Note: The setting takes effect only when tomcat is started by startup. bat. If the tomcat service is started by using windows system services, the above settings will not take effect,
That is to say, set JAVA_OPTS =-Xms200m-Xmx512m does not work.

2. Modify the startup parameters in Eclilpse and add-Xms200m-Xmx512m to the VM arguments, as shown in.

Solve the problem.