@Before
  public void setUp() throws Exception {
    server = getVM(0);
    client = getVM(1);

    uniqueName = getClass().getSimpleName() + "_" + testName.getMethodName();
    hostName = getHostName();

    DiskStoreImpl.SET_IGNORE_PREALLOCATE = true;

    invokeInEveryVM(() -> {
      DiskStoreImpl.SET_IGNORE_PREALLOCATE = true;
    });

    addIgnoredException(uniqueName);
  }
If IOException occurs while updating an entry in an already initialized DiskRegion, then the
cache server should be stopped.

<p>
TRAC #39079: Regions with persistence remain in use after IOException have occurred
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/InitializedDiskRegionWithIoExceptionRegressionTest.java