Julian Hyde created CALCITE-6588:
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             Summary: Support JDK 23 and Guava 33.3.0 in Avatica
                 Key: CALCITE-6588
                 URL: https://issues.apache.org/jira/browse/CALCITE-6588
             Project: Calcite
          Issue Type: Improvement
          Components: avatica
            Reporter: Julian Hyde
             Fix For: avatica-1.26.0


Support JDK 23 and Guava 33.3.0-jre, which are the latest available versions.

The lower bound has not changed: Avatica supports JDK down to 8, and Guava down 
to 19.0.

We will need to remove use of the {{getSubject}} method, which since JDK 23 
throws:
{noformat}
Caused by: java.lang.UnsupportedOperationException: getSubject is supported 
only if a security manager is allowed
        at java.base/javax.security.auth.Subject.getSubject(Subject.java:347)
        at 
org.apache.calcite.avatica.server.SubjectPreservingPrivilegedThreadFactory.newThread(SubjectPreservingPrivilegedThreadFactory.java:43)
{noformat}

The method has been deprecated for a while, but the deprecation did not cause a 
build failure, due to CALCITE-5136.



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