There are lots of questions that ask this or a similar question.
They all give the command that has to be executed, what I don't understand is where do I write this command. I want to permanently increase the heap space for my tomcat apps.
I read this page http://javahowto.blogspot.com/2006/06/6-common-errors-in-setting-java-heap.html and it says under the Tomcat section
Stop Tomcat server, set environment variable CATALINA_OPTS, and then restart Tomcat. Look at the file tomcat-install/bin/catalina.sh or catalina.bat for how this variable is used. For example,
set CATALINA_OPTS=-Xms512m -Xmx512m (Windows, no "" around the value)
export CATALINA_OPTS="-Xms512m -Xmx512m" (ksh/bash, "" around the value)
setenv CATALINA_OPTS "-Xms512m -Xmx512m" (tcsh/csh, "" around the value)
So I replaced the line
set CATALINA_OPTS=
with
set CATALINA_OPTS=-Xms512m -Xmx512m
But I still get the error.
javax.servlet.ServletException: Servlet execution threw an exception
root cause
java.lang.OutOfMemoryError: Java heap space java.lang.reflect.Array.multiNewArray(Native Method) java.lang.reflect.Array.newInstance(Array.java:90) nom.tam.util.ArrayFuncs.newInstance(ArrayFuncs.java:1028) nom.tam.fits.ImageData.read(ImageData.java:259) nom.tam.fits.Fits.readHDU(Fits.java:573) controller.UploadServlet.retreiveFITSFileFields(UploadServlet.java:206) controller.ScanServerFiles.doPost(ScanServerFiles.java:39) javax.servlet.http.HttpServlet.service(HttpServlet.java:637) javax.servlet.http.HttpServlet