"Covariant return type change detected" warnings with java10

[INFO] C:\projects\apache\oak\trunk\oak-store-document\src\main\java\org\apache\jackrabbit\oak\plugins\document\persistentCache\broadcast\TCPBroadcaster.java:327: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.flip() has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.flip()
[INFO] C:\projects\apache\oak\trunk\oak-store-document\src\main\java\org\apache\jackrabbit\oak\plugins\document\persistentCache\broadcast\UDPBroadcaster.java:135: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.limit(int) has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.limit(int)
[INFO] C:\projects\apache\oak\trunk\oak-store-document\src\main\java\org\apache\jackrabbit\oak\plugins\document\persistentCache\broadcast\UDPBroadcaster.java:138: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.position(int) has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.position(int)
[INFO] C:\projects\apache\oak\trunk\oak-store-document\src\main\java\org\apache\jackrabbit\oak\plugins\document\persistentCache\broadcast\TCPBroadcaster.java:226: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.position(int) has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.position(int)
[INFO] C:\projects\apache\oak\trunk\oak-store-document\src\main\java\org\apache\jackrabbit\oak\plugins\document\persistentCache\broadcast\InMemoryBroadcaster.java:35: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.position(int) has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.position(int)
[INFO] C:\projects\apache\oak\trunk\oak-store-document\src\main\java\org\apache\jackrabbit\oak\plugins\document\persistentCache\PersistentCache.java:519: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.limit(int) has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.limit(int)
[INFO] C:\projects\apache\oak\trunk\oak-store-document\src\main\java\org\apache\jackrabbit\oak\plugins\document\persistentCache\PersistentCache.java:522: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.position(int) has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.position(int)
[INFO] C:\projects\apache\oak\trunk\oak-store-document\src\main\java\org\apache\jackrabbit\oak\plugins\document\persistentCache\PersistentCache.java:535: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.position(int) has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.position(int)
[INFO] C:\projects\apache\oak\trunk\oak-segment-tar\src\main\java\org\apache\jackrabbit\oak\segment\data\SegmentDataV12.java:196: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.position(int) has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.position(int)
[INFO] C:\projects\apache\oak\trunk\oak-segment-tar\src\main\java\org\apache\jackrabbit\oak\segment\data\SegmentDataV12.java:197: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.limit(int) has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.limit(int)
[INFO] C:\projects\apache\oak\trunk\oak-segment-tar\src\main\java\org\apache\jackrabbit\oak\segment\data\SegmentDataUtils.java:57: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.position(int) has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.position(int)
[INFO] C:\projects\apache\oak\trunk\oak-segment-tar\src\main\java\org\apache\jackrabbit\oak\segment\data\SegmentDataUtils.java:58: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.limit(int) has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.limit(int)
[INFO] C:\projects\apache\oak\trunk\oak-segment-tar\src\main\java\org\apache\jackrabbit\oak\segment\file\tar\index\IndexWriter.java:110: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.position(int) has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.position(int)
[INFO] C:\projects\apache\oak\trunk\oak-segment-tar\src\main\java\org\apache\jackrabbit\oak\segment\file\tar\index\IndexLoaderV1.java:62: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.mark() has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.mark()
[INFO] C:\projects\apache\oak\trunk\oak-segment-tar\src\main\java\org\apache\jackrabbit\oak\segment\file\tar\index\IndexLoaderV1.java:64: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.reset() has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.reset()
[INFO] C:\projects\apache\oak\trunk\oak-segment-tar\src\main\java\org\apache\jackrabbit\oak\segment\file\tar\index\IndexLoaderV1.java:72: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.mark() has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.mark()
[INFO] C:\projects\apache\oak\trunk\oak-segment-tar\src\main\java\org\apache\jackrabbit\oak\segment\file\tar\index\IndexLoaderV1.java:101: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.reset() has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.reset()
[INFO] C:\projects\apache\oak\trunk\oak-segment-tar\src\main\java\org\apache\jackrabbit\oak\segment\file\tar\index\IndexLoaderV2.java:62: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.mark() has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.mark()
[INFO] C:\projects\apache\oak\trunk\oak-segment-tar\src\main\java\org\apache\jackrabbit\oak\segment\file\tar\index\IndexLoaderV2.java:64: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.reset() has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.reset()
[INFO] C:\projects\apache\oak\trunk\oak-segment-tar\src\main\java\org\apache\jackrabbit\oak\segment\file\tar\index\IndexLoaderV2.java:72: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.mark() has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.mark()
[INFO] C:\projects\apache\oak\trunk\oak-segment-tar\src\main\java\org\apache\jackrabbit\oak\segment\file\tar\index\IndexLoaderV2.java:101: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.reset() has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.reset()
[INFO] C:\projects\apache\oak\trunk\oak-segment-tar\src\main\java\org\apache\jackrabbit\oak\segment\file\tar\binaries\BinaryReferencesIndexLoader.java:71: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.position(int) has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.position(int)
[INFO] C:\projects\apache\oak\trunk\oak-segment-tar\src\main\java\org\apache\jackrabbit\oak\segment\file\tar\binaries\BinaryReferencesIndexLoader.java:73: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.rewind() has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.rewind()
[INFO] C:\projects\apache\oak\trunk\oak-segment-tar\src\main\java\org\apache\jackrabbit\oak\segment\file\tar\binaries\BinaryReferencesIndexLoaderV1.java:61: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.limit(int) has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.limit(int)
[INFO] C:\projects\apache\oak\trunk\oak-segment-tar\src\main\java\org\apache\jackrabbit\oak\segment\file\tar\binaries\BinaryReferencesIndexLoaderV1.java:63: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.position(int) has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.position(int)
[INFO] C:\projects\apache\oak\trunk\oak-segment-tar\src\main\java\org\apache\jackrabbit\oak\segment\file\tar\binaries\BinaryReferencesIndexLoaderV1.java:82: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.mark() has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.mark()
[INFO] C:\projects\apache\oak\trunk\oak-segment-tar\src\main\java\org\apache\jackrabbit\oak\segment\file\tar\binaries\BinaryReferencesIndexLoaderV1.java:84: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.reset() has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.reset()
[INFO] C:\projects\apache\oak\trunk\oak-segment-tar\src\main\java\org\apache\jackrabbit\oak\segment\file\tar\binaries\BinaryReferencesIndexLoaderV2.java:61: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.limit(int) has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.limit(int)
[INFO] C:\projects\apache\oak\trunk\oak-segment-tar\src\main\java\org\apache\jackrabbit\oak\segment\file\tar\binaries\BinaryReferencesIndexLoaderV2.java:63: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.position(int) has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.position(int)
[INFO] C:\projects\apache\oak\trunk\oak-segment-tar\src\main\java\org\apache\jackrabbit\oak\segment\file\tar\binaries\BinaryReferencesIndexLoaderV2.java:82: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.mark() has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.mark()
[INFO] C:\projects\apache\oak\trunk\oak-segment-tar\src\main\java\org\apache\jackrabbit\oak\segment\file\tar\binaries\BinaryReferencesIndexLoaderV2.java:84: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.reset() has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.reset()
[INFO] C:\projects\apache\oak\trunk\oak-segment-tar\src\main\java\org\apache\jackrabbit\oak\segment\file\tar\GraphLoader.java:78: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.mark() has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.mark()
[INFO] C:\projects\apache\oak\trunk\oak-segment-tar\src\main\java\org\apache\jackrabbit\oak\segment\file\tar\GraphLoader.java:80: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.reset() has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.reset()
[INFO] C:\projects\apache\oak\trunk\oak-segment-tar\src\main\java\org\apache\jackrabbit\oak\segment\file\tar\SegmentTarWriter.java:142: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.rewind() has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.rewind()
[INFO] C:\projects\apache\oak\trunk\oak-segment-tar\src\main\java\org\apache\jackrabbit\oak\segment\file\tar\FileAccess.java:72: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.position(int) has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.position(int)
[INFO] C:\projects\apache\oak\trunk\oak-segment-tar\src\main\java\org\apache\jackrabbit\oak\segment\file\tar\FileAccess.java:73: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.limit(int) has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.limit(int)
[INFO] C:\projects\apache\oak\trunk\oak-segment-tar\src\main\java\org\apache\jackrabbit\oak\segment\file\tar\SegmentTarManager.java:209: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.position(int) has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.position(int)
[INFO] C:\projects\apache\oak\trunk\oak-segment-tar\src\main\java\org\apache\jackrabbit\oak\segment\file\FileStore.java:489: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.rewind() has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.rewind()
[INFO] C:\projects\apache\oak\trunk\oak-segment-tar\src\main\java\org\apache\jackrabbit\oak\segment\memory\MemoryStore.java:118: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.rewind() has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.rewind()
[INFO] C:\projects\apache\oak\trunk\oak-segment-tar\src\main\java\org\apache\jackrabbit\oak\segment\SegmentStream.java:156: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.position(int) has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.position(int)
[INFO] C:\projects\apache\oak\trunk\oak-segment-azure\src\main\java\org\apache\jackrabbit\oak\segment\azure\AzureUtilities.java:69: Covariant return type change detected: java.nio.Buffer java.nio.ByteBuffer.rewind() has been changed to java.nio.ByteBuffer java.nio.ByteBuffer.rewind()