I am setting up SonarQube 8.9.10 (believe the last version supporting Java 11) in RHEL8. After setup everything, when I start, I get the following exception in web.log
2023.03.15 17:33:59 WARN web[][o.a.c.l.WebappClassLoaderBase] Failed to clear soft references from ObjectStreamClass$Caches for web application [sonar]
java.lang.ClassCastException: class java.io.ObjectStreamClass$Caches$1 cannot be cast to class java.util.Map (java.io.ObjectStreamClass$Caches$1 and java.util.Map are in module java.base of loader 'bootstrap')
at org.apache.catalina.loader.WebappClassLoaderBase.clearCache(WebappClassLoaderBase.java:2331)
at org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesObjectStreamClassCaches(WebappClassLoaderBase.java:2306)
at org.apache.catalina.loader.WebappClassLoaderBase.clearReferences(WebappClassLoaderBase.java:1675)
at org.apache.catalina.loader.WebappClassLoaderBase.stop(WebappClassLoaderBase.java:1605)
at org.apache.catalina.loader.WebappLoader.stopInternal(WebappLoader.java:455)
at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:257)
at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5505)
at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:257)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:187)