Run JVM and JDK 1.4.2 from IBM in parallel

[Former Member]

Hi all experts and gurus

We are about to upgrade JVM to 4.1 in our production portal. But before I am going to start with it in production I would like to know if itu2019s possible to run JVM and JDK 1.4.2 from IBM in parallel in a cluster configuration with many Java instances.

Please help us out with this.

Thank you in advance

Best Regards

Daniel Jadeholt

[Former Member · Accepted solution]

Hi Daniel,

I see no harm in having multiple JDKs as far as you keep them in different directories. After all, JAVA_HOME, PATH and CLASSPATH are the controlling environment variables you setup locally for each SAP server on the same host.

1302762 - Multiple JDKs on a single host

Br,

Venky

[Former Member · Accepted solution]

Hi,

Thank you for the reply it was very useful information, I will keep this in mind when upgrading the production systems.

Best regards

Daniel Jadeholt

[Former Member]

Which OS will you be installing on? It's likely that you'll be fine, since you'll be able to configure the primary JVM via update-alternatives.

This is how we configure all of ours:

Install IBM JDK into /opt/

Point installers explicitly to the IBM directory.

Keep the default JDK installed for all other functions.