@Test
  public void testDeletePossiblyRenamedFileDoesNotDestroyChunks() throws Exception {
    ConcurrentHashMap spyFileRegion = Mockito.spy(fileAndChunkRegion);
    system = new FileSystem(spyFileRegion, fileSystemStats);

    String sourceFileName = "sourceFile";
    File file1 = system.createFile(sourceFileName);
    byte[] data = writeRandomBytes(file1);

    Mockito.doReturn(file1).when(spyFileRegion).remove(any());

    String destFileName = "destFile";
    system.renameFile(sourceFileName, destFileName);
    File destFile = system.getFile(destFileName);

    assertNotNull(system.getFile(sourceFileName));
    system.deleteFile(sourceFileName);
    assertNotNull(system.getChunk(destFile, 0));

  }
Test what happens a file rename is aborted in the middle due to the a cache closed exception.
The next member that uses those files should be able to clean up after the partial rename.
geode-lucene/src/test/java/org/apache/geode/cache/lucene/internal/filesystem/FileSystemJUnitTest.java