WARNING! You are using an unsupported Java runtime

[Rodger]

Dear Experts,

I've recently created a new server with Redhat 6.4.

uname -a

Linux black.testrac.com 2.6.32-358.11.1.el6.x86_64 #1 SMP Tue Jun 11 10:24:58 PDT 2013 x86_64 x86_64 x86_64 GNU/Linux

cat /etc/redhat-release

Red Hat Enterprise Linux Server release 6.4 (Santiago)

lsb_release -a

LSB Version: :base-4.0-amd64:base-4.0-noarch:core-4.0-amd64:core-4.0-noarch:graphics-4.0-amd64:graphics-4.0-noarch:printing-4.0-amd64:printing-4.0-noarch

Distributor ID: OracleServer

Description: Oracle Linux Server release 6.4

Release: 6.4

Codename: n/a

I unzipped NEO4J 1.9 community.

Dealt with the max open files warning.

cd /neo4j/neo4j-community-1.9/bin/

./neo4j start &

 WARNING! You are using an unsupported Java runtime. Please use Oracle(R) Java(TM) Runtime Environment 7.

Starting Neo4j Server...WARNING: not changing user

process [3808]... waiting for server to be ready.....

java -version

java version "1.7.0_19"

OpenJDK Runtime Environment (rhel-2.3.9.1.0.1.el6_4-x86_64)

OpenJDK 64-Bit Server VM (build 23.7-b01, mixed mode)

rpm -qa | grep -i "jre"

jre-1.7.0_21-fcs.x86_64

rpm -qa | grep -i "jvm"

- nothing

/usr/sbin/alternatives --config java

There are 3 programs which provide 'java'.

  Selection    Command

-----------------------------------------------

*+ 1           /usr/lib/jvm/jre-1.7.0-openjdk.x86_64/bin/java

   2           /usr/lib/jvm/jre-1.6.0-openjdk.x86_64/bin/java

   3           /usr/lib/jvm/jre-1.5.0-gcj/bin/java

Enter to keep the current selection[+], or type selection number: 

/usr/sbin/alternatives --config java

    There are 2 programs which provide 'java'.

    Selection    Command

    -----------------------------------------------

       1           /usr/lib/jvm/jre-1.4.2-gcj/bin/java

    *+ 2           /usr/lib/jvm/jre-1.6.0-sun/bin/java

    Enter to keep the current selection[+], or type selection number:

/usr/sbin/alternatives --config javac

There are 2 programs which provide 'javac'.

  Selection    Command

-----------------------------------------------

   1           /usr/lib/jvm/java-1.6.0-openjdk.x86_64/bin/javac

*+ 2           /usr/lib/jvm/java-1.7.0-openjdk.x86_64/bin/javac

What is the secret to making this error go away?

If I have java version 7 or 1.7 JDK and JRE packages installed, why am I getting these errors.  

Thanks a lot!

[Lasse Westh-Nielsen]

Rodger,

What is JAVA_HOME set to? I believe that is where the start script looks to find a JRE/ JDK. 

Regards,

Lasse

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[Rodger]

Good one!  That worked to get NEO4J started. 

I remember now from before, on Windows. 

without bin

> JAVA_HOME=C:\Program Files (x86)\Java\jdk1.7.0_15

with bin

> JAVA_PATH=C:\Program Files (x86)\Java\jdk1.7.0_15\bin

without bin

> JRE_HOME=C:\Program Files (x86)\Java\jre7

I set JAVA_HOME and JAVA_PATH in the .bash files and it worked. 

export JAVA_HOME=/usr/java/jre1.7.0_21

export JAVA_PATH=/usr/java/jre1.7.0_21/bin

---

It seems that a pre check script is in order to look for the environment variables, the right java version, etc.

Oracle has had big precheck routines for a while now.

Especially with the big ERP software like Apps R12.

But now, just for the database, there is a whole package for the pre checks:

rpm -qa | grep -i "preins"

oracle-rdbms-server-11gR2-preinstall-1.0-7.el6.x86_64

---

Turns out that some of those links in 

/usr/sbin/alternatives 

are completely bogus! What a waste of my time.