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https://issues.apache.org/jira/browse/DERBY-7149?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17646293#comment-17646293
 ] 

Richard N. Hillegas commented on DERBY-7149:
--------------------------------------------

I see the following new warnings when I build Derby with Open JDK build 
20-ea+27-2213:

{noformat}
    [javac] Note: Some input files use or override a deprecated API.
    [javac] Note: Recompile with -Xlint:deprecation for details.
    [javac] Note: Some input files use or override a deprecated API that is 
marked for removal.
    [javac] Note: Recompile with -Xlint:removal for details.
    [javac] 
/Users/rhillegas/derby/mainline/trunk/java/build/org/apache/derbyBuild/JiraConnector.java:117:
 warning: [deprecation] URL(String) in URL has been deprecated
    [javac]             URL url= new URL(XMLurl);
    [javac]                      ^
    [javac] 
/Users/rhillegas/derby/mainline/trunk/java/build/org/apache/derbyBuild/ReleaseNotesGenerator.java:386:
 warning: [deprecation] URL(String) in URL has been deprecated
    [javac]                     URL url = new 
URL(issue.getReleaseNoteAddress());
    [javac]                               ^
    [javac] 2 warnings
    [javac] 
/Users/rhillegas/derby/mainline/trunk/java/org.apache.derby.tools/org/apache/derby/impl/tools/ij/mtTester.java:107:
 warning: [removal] ThreadDeath in java.lang has been deprecated and marked for 
removal
    [javac]                             throw new ThreadDeath();
    [javac]                                       ^
    [javac] 
/Users/rhillegas/derby/mainline/trunk/java/org.apache.derby.tools/org/apache/derby/impl/tools/sysinfo/Main.java:571:
 warning: [deprecation] URL(String) in URL has been deprecated
    [javac]                       testJarURL = new URL(successString);
    [javac]                                    ^
    [javac] 2 warnings
    [javac] 
/Users/rhillegas/derby/mainline/trunk/java/org.apache.derby.optionaltools/org/apache/derby/optional/api/SimpleJsonUtils.java:254:
 warning: [deprecation] URL(String) in URL has been deprecated
    [javac]             URL url = new URL( url_string );
    [javac]                       ^
    [javac] 1 warning
    [javac] 
/Users/rhillegas/derby/mainline/trunk/java/org.apache.derby.tests/org/apache/derbyTesting/functionTests/tests/jdbcapi/CallableTest.java:1159:
 warning: [deprecation] URL(String) in URL has been deprecated
    [javac]                     URL domain = new URL("http://www.apache.org";);
    [javac]                                  ^
    [javac] 
/Users/rhillegas/derby/mainline/trunk/java/org.apache.derby.tests/org/apache/derbyTesting/functionTests/tests/upgradeTests/UpgradeClassLoader.java:173:
 warning: [deprecation] URL(String) in URL has been deprecated
    [javac]                     url[i] = new URL(oldURLJarLocation + "/" + 
jarFiles[i]);
    [javac]                              ^
    [javac] 
/Users/rhillegas/derby/mainline/trunk/java/org.apache.derby.tests/org/apache/derbyTesting/unitTests/harness/BasicUnitTestManager.java:185:
 warning: [removal] ThreadDeath in java.lang has been deprecated and marked for 
removal
    [javac]                     if (t instanceof ThreadDeath)
    [javac]                                      ^
    [javac] 
/Users/rhillegas/derby/mainline/trunk/java/org.apache.derby.tests/org/apache/derbyTesting/unitTests/harness/T_MultiThreadedIterations.java:194:
 warning: [removal] ThreadDeath in java.lang has been deprecated and marked for 
removal
    [javac]             catch (ThreadDeath death) // some other thread has died 
and want to see my stack 
    [javac]                    ^
    [javac] 4 warnings
{noformat}


> Make it possible to build and test Derby cleanly with JDK 20
> ------------------------------------------------------------
>
>                 Key: DERBY-7149
>                 URL: https://issues.apache.org/jira/browse/DERBY-7149
>             Project: Derby
>          Issue Type: Task
>          Components: Build tools
>    Affects Versions: 10.17.0.0
>            Reporter: Richard N. Hillegas
>            Assignee: Richard N. Hillegas
>            Priority: Major
>




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