RFR: 8364361: [process] java.lang.Process should implement Closeable [v11]

[Jaikiran Pai]

On Mon, 22 Sep 2025 22:25:59 GMT, Roger Riggs <rriggs at openjdk.org> wrote:

>> The teardown of a Process launched by `ProcessBuilder` includes the closing of streams and ensuring the termination of the process is the responsibility of the caller. The `Process.close()` method provides a clear and obvious way to ensure all the streams are closed and the process terminated.
>> 
>> The try-with-resources statement is frequently used to open streams and ensure they are closed on exiting the block. By implementing `AutoClosable.close()` the completeness of closing the streams and process termination can be done by try-with-resources.
>> 
>> The actions of the `close()` method are to close each stream and destroy the process if it has not terminated.
>
> Roger Riggs has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update close() to use "terminate" consistently.

I just noticed that the GitHub action job failure looks related:


STARTED    jdk.java.lang.Process.ProcessCloseTest::testStreamsCloseThrowing ...
...
FileDescriptor.handle: 00000598
FileDescriptor.handle to close again and fail: 00000598
org.opentest4j.AssertionFailedError: Unexpected exception message ==> expected: <Bad file descriptor> but was: <The handle is invalid>
    at org.junit.jupiter.api.AssertionFailureBuilder.build(AssertionFailureBuilder.java:151)
    at org.junit.jupiter.api.AssertionFailureBuilder.buildAndThrow(AssertionFailureBuilder.java:132)
    at org.junit.jupiter.api.AssertEquals.failNotEqual(AssertEquals.java:197)
    at org.junit.jupiter.api.AssertEquals.assertEquals(AssertEquals.java:182)
    at org.junit.jupiter.api.Assertions.assertEquals(Assertions.java:1156)
    at jdk.java.lang.Process.ProcessCloseTest.testStreamsCloseThrowing(ProcessCloseTest.java:533)

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PR Comment: https://git.openjdk.org/jdk/pull/26649#issuecomment-3346091852