Monitor Service - Mail Notification NPE if Job Notification setting 'Mail on' does not match the configured CONFIGURATION/Notification type and 'Mail to' is empty

Current Situation
When a Job configured with the following Notification settings:

• Mail on is not empty but does not correspond to the configured CONFIGURATION/Notification type
• Mail to is empty
  the Mail Notification throws a NPE exception:

  c.s.j.m.m.NotifierModel            - java.lang.NullPointerException
  java.lang.NullPointerException: null
  	at com.sos.joc.monitoring.notification.notifier.NotifierMail.checkJobNotificationTypes(NotifierMail.java:313) ~[sos-joc-monitoring-2.2.3.jar:?]
  	at com.sos.joc.monitoring.notification.notifier.NotifierMail.checkJobNotification(NotifierMail.java:262) ~[sos-joc-monitoring-2.2.3.jar:?]
  	at com.sos.joc.monitoring.notification.notifier.NotifierMail.notify(NotifierMail.java:56) ~[sos-joc-monitoring-2.2.3.jar:?] 
  

Desired Behaviour
The Mail Notification should not throw any NPE.

Test Instructions

• CONFIGURATION/Inventory
  • configure a shell job:
    • Job Properties: Script
      • exit 1
    • Notification: Mail on
      • SUCCESS
• CONFIGURATION/Notification
  • configure a mail notification with the type ERROR.
• Deploy an run the configured workflow.
• Expected result:
  • a Mail Notification should not be sent
    • because Notification type ERROR does not correspond to the Job Notification type SUCCESS.
  • the log file service-monitor.log should not contain any NPE exception.

Workaround

• Apply the following patch for JOC Cockpit 2.2.3:
  • https://download.sos-berlin.com/patches/2.2.3-patch/patch_20220809_JITL-687_JITL-701_JOC-1357_on_2.2.3_JOC.zip
    • Please refere to the documentation JS7 - Patches for JOC Cockpit