Matt Pavlovich created KARAF-7977:
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             Summary: Support JDK JAAS API migration 
                 Key: KARAF-7977
                 URL: https://issues.apache.org/jira/browse/KARAF-7977
             Project: Karaf
          Issue Type: Improvement
            Reporter: Matt Pavlovich


The JDK JAAS API is undergoing transition to better support Virtual Threads by 
removing APIs that utilize ThreadLocal.

Issue(s):

1. JDK 11 and 17 do not support the end-state APIs
2. Mixing JAAS APIs will break if users switch JDKs for the same Karaf and any 
code that uses JAAS security APIs.

API combinations:

doAs() + AccessController <-- deprecated for removal
callAs() + Subject.current() <-- first available in JDK 18 (or JDK 21 LTS)

There is not a current solution to provide:

1. Seamless transition for Karaf users across JDKs, unless the starting 
supported LTS version is JDK 21

2. Consistent JAAS API usage across Karaf 



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