I am also seeing a similar issue when the Connect-SOAP is throwing a inboundMappingException due to empty SOAP body. The logs are empty and in tracer I see NoClassDefFound for com/pega/apache/log4j/spi/ThrowableInformation class. This relates to the ThrowableInformation Class file inside the prlogging-1.2.14 jar file. However I am able to see the jar and the class in the DB.
So it seems as if Pega is not able to load the class from the DB and instead trying to locate is from somewhere else.
How do I ensure that Pega looks at the DB for this class and not to the JVM?