@Override
      public void afterHavingCompacted() {
        try {
          awaitLatch(compactorSignalledLatch);
          DiskRegion diskRegion = getDiskRegion(region);
          assertThat(diskRegion.getOplogIdToOplog()).hasSize(oplogSizeBeforeRolling);
        } catch (AssertionError | Exception e) {
          errorCollector.addError(e);
        } finally {
          compactorCompletedLatch.countDown();
        }
      }
If IOException occurs while initializing a region, then the cache servers should not be
stopped
geode-core/src/integrationTest/java/org/apache/geode/internal/cache/DiskRegionJUnitTest.java