On 11/06/2021 21:53, Joel Griffith wrote:
Hi everyone,
I have two Ubuntu 20.04 servers, both with Tomcat 9 and Java 8 installed
from the standard repositories.
On the first, I installed Java 8 before installing Tomcat 9. When I
installed Tomcat 9, it evidently found the existing Java 8 installation,
and when I run the server it reports that it's using Java 8
(`/usr/lib/jvm/java-8-openjdk-amd64/bin/java`).
On the second, I installed Tomcat 9 before installing Java. Thus, Tomcat
found no existing Java on the system, and it installed the additional
packages 'openjdk-11-jre-headless', 'default-jre-headless', and
'java-common' as dependencies that it did not install on the first system.
When I run Tomcat on this one, it reports that it's using Java 11
(`/usr/lib/jvm/default-java/bin/java`, which symlinks to
`/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java`), even though I've since
installed Java 8 on that server, too.
Both systems use Java 8 as their default at the OS level (outside of
Tomcat):
$ java -version
openjdk version "1.8.0_292"
so I think it's a Tomcat-specific discrepancy.
I assume that there's a file Tomcat uses to record which version of Java it
established at installation and which continues to affect how it runs now.
Is that right, and if so, where is this file?
Nope. Nothing to do with Tomcat. You'll need to ask Ubuntu support what
is going on.
Mark
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