Notice "JAVA executable path was not found"

I’ve been trying to get the YUI minifier to work, but every time I fill in the paths I get to see the following error:

JAVA executable (/usr/lib/jvm/jre-1.6.0-openjdk.x86_64/bin/java) is not a valid file.

I found my executable from my server like this:
update-alternatives --display java

That gives me back the following:

java - status is auto.
link currently points to /usr/lib/jvm/jre-1.6.0-openjdk.x86_64/bin/java
/usr/lib/jvm/jre-1.6.0-openjdk.x86_64/bin/java - priority 16000
slave jre: /usr/lib/jvm/jre-1.6.0-openjdk.x86_64
slave jre_exports: /usr/lib/jvm-exports/jre-1.6.0-openjdk.x86_64
slave keytool: /usr/lib/jvm/jre-1.6.0-openjdk.x86_64/bin/keytool
slave orbd: /usr/lib/jvm/jre-1.6.0-openjdk.x86_64/bin/orbd
slave pack200: /usr/lib/jvm/jre-1.6.0-openjdk.x86_64/bin/pack200
slave rmid: /usr/lib/jvm/jre-1.6.0-openjdk.x86_64/bin/rmid
slave rmiregistry: /usr/lib/jvm/jre-1.6.0-openjdk.x86_64/bin/rmiregistry
slave servertool: /usr/lib/jvm/jre-1.6.0-openjdk.x86_64/bin/servertool
slave tnameserv: /usr/lib/jvm/jre-1.6.0-openjdk.x86_64/bin/tnameserv
slave unpack200: /usr/lib/jvm/jre-1.6.0-openjdk.x86_64/bin/unpack200
slave java.1.gz: /usr/share/man/man1/java-java-1.6.0-openjdk.1.gz
slave keytool.1.gz: /usr/share/man/man1/keytool-java-1.6.0-openjdk.1.gz
slave orbd.1.gz: /usr/share/man/man1/orbd-java-1.6.0-openjdk.1.gz
slave pack200.1.gz: /usr/share/man/man1/pack200-java-1.6.0-openjdk.1.gz
slave rmid.1.gz: /usr/share/man/man1/rmid-java-1.6.0-openjdk.1.gz
slave rmiregistry.1.gz: /usr/share/man/man1/rmiregistry-java-1.6.0-openjdk.1.gz
slave servertool.1.gz: /usr/share/man/man1/servertool-java-1.6.0-openjdk.1.gz
slave tnameserv.1.gz: /usr/share/man/man1/tnameserv-java-1.6.0-openjdk.1.gz
slave unpack200.1.gz: /usr/share/man/man1/unpack200-java-1.6.0-openjdk.1.gz
Current best' version is /usr/lib/jvm/jre-1.6.0-openjdk.x86_64/bin/java.

Figuring the ‘best version’ is the one to use I try to use that one.

What’s still wrong here?

https://www.ads-software.com/plugins/w3-total-cache/