I have worked on this also. It almost appears like:
jms_system_properties = javax.net.ssl.keyStore=/opt/splunk/keystore.jks,javax.net.ssl.keyStorePassword=changeit,javax.net.ssl.trustStore=/etc/pki/tls/certs/allTrustedPartners.jks,javax.net.ssl.trustStorePassword=Changeit1
is NOT being processed by the JMS App. File permissions and ownership have been verified as accessible for the Splunk application. Other attributes do appear to be processed, just not this one. We made a Java stand alone app with the same settings and that does work.
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