[I] MappedByteBuffer unmapping on JDK 9+ (logging-log4j2)

["ppkarwasz (via GitHub)" <gi...@apache.org>]

ppkarwasz opened a new issue, #1646:
URL: https://github.com/apache/logging-log4j2/issues/1646

   ## Description
   
   The `MemoryMappedFileAppender` fails to unmap its buffers on JRE 9+: the unmapping code (cf. [`MemoryMappedFileAppender#unsafeUnmap()`](https://github.com/apache/logging-log4j2/blob/92538f9752651f73e7bb66e490efc233959fa143/log4j-core/src/main/java/org/apache/logging/log4j/core/appender/MemoryMappedFileManager.java#L225) requires:
   ```
   --add-opens java.base/java.nio=ALL-UNNAMED
   --add-exports java.base/jdk.internal.ref=ALL-UNNAMED
   ```
   These two permissions are not given by default.
   
   Since Java 9 the cleaner is accessible through `sun.misc.Unsafe#invokeCleaner` instead.
   


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Re: [I] MappedByteBuffer unmapping on JDK 9+ (logging-log4j2)

["ppkarwasz (via GitHub)" <gi...@apache.org>]

ppkarwasz closed issue #1646: MappedByteBuffer unmapping on JDK 9+
URL: https://github.com/apache/logging-log4j2/issues/1646


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