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https://issues.apache.org/jira/browse/OPENMEETINGS-2389?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Maxim Solodovnik resolved OPENMEETINGS-2389.
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Resolution: Fixed
I believe this one is fixed
Documentation is updated
> Installation - minimum version Java and error messages in Apache Tomcat vs
> OpenMeetings webapp
> ----------------------------------------------------------------------------------------------
>
> Key: OPENMEETINGS-2389
> URL: https://issues.apache.org/jira/browse/OPENMEETINGS-2389
> Project: Openmeetings
> Issue Type: Bug
> Components: Installer
> Affects Versions: 5.0.0-M4
> Reporter: Sebastian Wagner
> Priority: Minor
> Fix For: 5.0.0
>
>
> Its a bit confusing with the installer:
> OpenMeetings 5.x requires Java11, but when running the startup.sh script it
> will tell you first: Minimum version is 52 (which is java8)
>
> {code:java}
> Using CLASSPATH:
> /home/openmeetings/apache-openmeetings-5.0.0-SNAPSHOT/bin/bootstrap.jar:/home/openmeetings/apache-openmeetings-5.0.0-SNAPSHOT/bin/tomcat-juli.jar
> Exception in thread "main" java.lang.UnsupportedClassVersionError:
> org/apache/catalina/startup/Bootstrap : Unsupported major.minor version 52.0
> {code}
>
> Cause that is the minimum version for the Apache Tomcat server that
> OpenMeetings is packaged inside.
> But if you try java8 it will just not startup with:
> {code:java}
> 07-Jun-2020 05:34:40.770 INFO [main]
> org.apache.catalina.core.ApplicationContext.log No Spring
> WebApplicationInitializer types detected on classpath
> 07-Jun-2020 05:34:40.772 SEVERE [main]
> org.apache.catalina.core.StandardContext.listenerStart Error configuring
> application listener of class [org.apache.openmeetings.util.OMContextListener]
> java.lang.UnsupportedClassVersionError:
> org/apache/openmeetings/util/OMContextListener has been compiled by a more
> recent version of the Java Runtime (class file version 55.0), this version of
> the Java Runtime only recognizes class file versions up to 52.0 (unable to
> load class [org.apache.openmeetings.util.OMContextListener])
> {code}
> And it will actually not create above logs, unless you manually edit add some
> logging.properties as it won't even start the logger context.
> But in fact OpenMeetings require Java11.
> This could be probably be improved to just clearly make Java11 minimum
> requirement and fail right from the start with binary version 55.0 error.
>
>
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