Hello @GregDol    Thanks for using Cloudera Community. This is an Old Post, yet I am sharing a review for other Community Users, in case they encounter the concerned issue.    Reviewing the Post indicates the Issue is likely caused by missing "rt.jar" in the JDK used by the Solr Service. In other words, the concerned Class "java.time.zone.ZoneRulesProvider" is present in "/usr/java/jdk1.8.0_232-cloudera/jre/lib/rt.jar" for CDP Cluster (Path & Version may be different for Customer). The concerned JDK is used by the various Services running including Solr.   In your scenario, the concerned Class appears to be missing. Assuming your team wish to confirm whether a JAR consists of the Class, you may use Command [ /usr/java/jdk1.8.0_232-cloudera/bin/jar -tvf /usr/java/jdk1.8.0_232-cloudera/jre/lib/rt.jar] to list the Classes, which should include "java.time.zone.ZoneRulesProvider" as well. If your Team is using any different JDK, Review the same & ensure the "rt.jar" is present for Class "java.time.zone.ZoneRulesProvider" to be loaded successfully.    Regards, Smarak ... View more