Are you also having the same error?

Solution

This happens when MW_HOME is not defined and weblogic.jar is getting called twice in CLASSPATH. To fix this, check below two points.

Ensure weblogic.jar in CLASSPATH is not duplicated. You can check CLASSPATH section when it prints while starting. Set MW_HOME either on Unix shell or in startup scripts.

Start Oracle WebLogic now, it should work!

BEA 000362 Server failed  Reason  Parsing Failure in config xml  java lang IllegalArgumentException - 16BEA 000362 Server failed  Reason  Parsing Failure in config xml  java lang IllegalArgumentException - 52BEA 000362 Server failed  Reason  Parsing Failure in config xml  java lang IllegalArgumentException - 96BEA 000362 Server failed  Reason  Parsing Failure in config xml  java lang IllegalArgumentException - 25BEA 000362 Server failed  Reason  Parsing Failure in config xml  java lang IllegalArgumentException - 84BEA 000362 Server failed  Reason  Parsing Failure in config xml  java lang IllegalArgumentException - 74BEA 000362 Server failed  Reason  Parsing Failure in config xml  java lang IllegalArgumentException - 7BEA 000362 Server failed  Reason  Parsing Failure in config xml  java lang IllegalArgumentException - 93BEA 000362 Server failed  Reason  Parsing Failure in config xml  java lang IllegalArgumentException - 86BEA 000362 Server failed  Reason  Parsing Failure in config xml  java lang IllegalArgumentException - 97BEA 000362 Server failed  Reason  Parsing Failure in config xml  java lang IllegalArgumentException - 44BEA 000362 Server failed  Reason  Parsing Failure in config xml  java lang IllegalArgumentException - 6BEA 000362 Server failed  Reason  Parsing Failure in config xml  java lang IllegalArgumentException - 89BEA 000362 Server failed  Reason  Parsing Failure in config xml  java lang IllegalArgumentException - 77BEA 000362 Server failed  Reason  Parsing Failure in config xml  java lang IllegalArgumentException - 87BEA 000362 Server failed  Reason  Parsing Failure in config xml  java lang IllegalArgumentException - 58BEA 000362 Server failed  Reason  Parsing Failure in config xml  java lang IllegalArgumentException - 51BEA 000362 Server failed  Reason  Parsing Failure in config xml  java lang IllegalArgumentException - 99BEA 000362 Server failed  Reason  Parsing Failure in config xml  java lang IllegalArgumentException - 54BEA 000362 Server failed  Reason  Parsing Failure in config xml  java lang IllegalArgumentException - 63BEA 000362 Server failed  Reason  Parsing Failure in config xml  java lang IllegalArgumentException - 81BEA 000362 Server failed  Reason  Parsing Failure in config xml  java lang IllegalArgumentException - 71BEA 000362 Server failed  Reason  Parsing Failure in config xml  java lang IllegalArgumentException - 86