void beginDestroyRegion(DiskRegion dr) {
    if (dr.isBackup()) {
      getDiskInitFile().beginDestroyRegion(dr);
    }
  }
stops the compactor outside the write lock. Once stopped then it proceeds to destroy the
current & old oplogs
geode-core/src/main/java/org/apache/geode/internal/cache/DiskStoreImpl.java