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https://issues.apache.org/jira/browse/DERBY-7126?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17446072#comment-17446072
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Richard N. Hillegas commented on DERBY-7126:
--------------------------------------------

My naive attempt to workaround the new hurdle introduced by JDK 18 was to 
programatically set the "java.security.manager" property just before calling 
System.setSecurityManager()--as we do with the other properties related to the 
SecurityManager. Unfortunately, this does not allow the SecurityManager to be 
installed. However, if I set that property on the boot command line, then the 
SecurityManager can be installed. I have attached a simple program 
(DERBY_7126_B), which demonstrates this behavior.

Here is the output from running the program against JDK 18 WITHOUT setting 
"java.security.manager":

{noformat}
mainline (18) > java DERBY_7126_B
Exception in thread "main" java.lang.UnsupportedOperationException: The 
Security Manager is deprecated and will be removed in a future release
        at java.base/java.lang.System.setSecurityManager(System.java:411)
        at DERBY_7126_B.main(DERBY_7126_B.java:34)
{noformat}

And here is the output from running the program against JDK 18 and setting 
"java.security.manager" on the boot command line:

{noformat}
mainline (18) > java -Djava.security.manager=allow DERBY_7126_B
WARNING: A terminally deprecated method in java.lang.System has been called
WARNING: System::setSecurityManager has been called by DERBY_7126_B 
(file:/Users/rhillegas/src/)
WARNING: Please consider reporting this to the maintainers of DERBY_7126_B
WARNING: System::setSecurityManager will be removed in a future release
{noformat}

Looks like another trip to the Open JDK security mailing list is in order.


> Make it possible to build and test Derby cleanly with OpenJDK 18
> ----------------------------------------------------------------
>
>                 Key: DERBY-7126
>                 URL: https://issues.apache.org/jira/browse/DERBY-7126
>             Project: Derby
>          Issue Type: Task
>          Components: Build tools
>    Affects Versions: 10.16.0.0
>            Reporter: Richard N. Hillegas
>            Assignee: Richard N. Hillegas
>            Priority: Major
>         Attachments: DERBY_7126_A.java, DERBY_7126_B.java, dcl_emc2sm.jar, 
> derby-7126-01-aa-regenerateSignedJars.diff, 
> derby-7126-02-aa-suppressDeprecationWarnings.diff
>
>
> Releases of Open JDK 18 can be found at https://jdk.java.net/178. We should 
> adjust Derby as necessary so that it builds cleanly (including javadoc) and 
> tests cleanly with this version of the platform.



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