public void releaseBackupLock() {
    ReentrantLock backupLock = getBackupLock();
    if (backupLock.isHeldByCurrentThread()) {
      backupLock.unlock();
    }
  }
Release the lock that is preventing operations on this disk store during the backup process.
geode-core/src/main/java/org/apache/geode/internal/cache/DiskStoreImpl.java