Multiple JDK versions , JAVA_HOME environment varible not being used

1) On a V7R1 system, JDK 5,6,7,8 installed, with no *SYS Java_Home, HTTP admin instance uses 3 different JDKs.

From WRKJVMJOB, 5=Work with

ADMIN1 JDK 1.6.0 32 bit
ADMIN2 JDK 1.7.0 64 bit
ADMIN4 JDK 1.7.0 32 bit
ADMIN5 JDK 1.6.0 32 bit
ADMIN3 JDK 1.6.0 32 bit

On a sandbox V7R1 system, JDK 5,6,7,8 installed, with a *SYS Java_Home '/QOpenSys/QIBM/ProdData/JavaVM/jdk80/32bit' , HTTP admin instance uses same 3 different JDKs.

From WRKJVMJOB, 5=Work with

ADMIN1 JDK 1.6.0 32 bit
ADMIN2 JDK 1.7.0 64 bit
ADMIN4 JDK 1.7.0 32 bit
ADMIN5 JDK 1.6.0 32 bit
ADMIN3 JDK 1.6.0 32 bit

This implies that the various HTTP Admin jobs are all hardcoded to use various JDKs, or possibly the Java_Home variable is not WAD.
Why would IBM do this?

2) Also, from the links Kevin provided, notice the pecking order differences for the various releases, if multiple JDKs installed.

V7R1 - JDK 6,5,7,4
V7R2 - JDK 7.1, 7.0, 6, 8
V7R3 - JDK 8, 7.1, 7.0

3) IBM i OS default JDKs - this is the JDK used if the JAVA_HOME environment is NOT configured system-wide or at the job scope.

IBM i 5.4 - Classic 1.4.2 64 bit
IBM i 6.1 - IT4J 5.0 32 bit
IBM i 7.1 - IT4J 6.0 32 bit
IBM i 7.2 - IT4J 7.1 32 bit
IBM i 7.3 - IT4J 8.0 32 bit

4) Anyone on V7R2 or V7R3 running 5722IP1 V5R3M0 IBM Infoprint Server for iSeries.
I believe this is a skip/shipped product, V5R3 still the latest.
What version JDK to you see being used for IP1?

5) Appears all my Java apps are currently hardcoded.

Paul



-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Rob Berendt
Sent: Wednesday, April 19, 2017 12:40 PM
To: Midrange Systems Technical Discussion
Subject: RE: Attn 7.1 users who plan on staying there for an indefinite time

I wonder why 7.3 IBM Navigator for i chooses 7.1 jdk by setting a job JAVA_HOME while everything else uses 8, including Domino?


Rob Berendt