Solr - use 64-bit Java, not 32-bit Java on Windows 7 64-bit

Question

I have a Windows 7 64-bit machine. I have Java Runtime Environment for both 32-bit and 64 bit installed on the machine. How do I tell Solr to use the 64-bit version of JRE when I start up Solr?

Answer 1

Assuming you are running Solr in Tomcat: Set your JAVA_HOME environment variable to point to the 64-bit version of Java instead of the 32-bit. Then execute startup.bat in Tomcat.

Other servlet containers should also be observing the JAVA_HOME environment variable, but I cannot speak for any other than Tomcat.

Answer 2

If, by, start up SOLR you mean start Tomcat with the solr.war installed, then your question is really about how to tell Tomcat to use 64 bit java. I don't have the answer exactly, but I think you can just edit the catalina.bat file. In any case, Google for Tomcat + 64-bit java and see what comes up.

Answer 3

Thanks for the suggestions. But I found out what I did wrong. By starting up Solr, I meant running the 'java -jar start.jar' command with the Windows Command Prompt. To start up Solr using the 64-bit JRE, you have to use the Windows Command Prompt for 64-bit. I wasn't aware of two different versions of the Windows Command Prompt (32-bit and 64-bit).