private void checkBeforeDropPipeInternal(final String pipeName) {
    if (LOGGER.isDebugEnabled()) {
      LOGGER.debug(
          "Check before drop pipe {}, pipe exists: {}.", pipeName, isPipeExisted(pipeName));
    }
    // No matter whether the pipe exists, we allow the drop operation executed on all nodes to
    // ensure the consistency.
    // DO NOTHING HERE!
  }
Caller should ensure that the method is called in the lock {@link #acquireWriteLock}.
iotdb-core/confignode/src/main/java/org/apache/iotdb/confignode/persistence/pipe/PipeTaskInfo.java