public void serializeExistedJarToMD5(OutputStream outputStream) throws IOException {
    ReadWriteIOUtils.write(existedJarToMD5.size(), outputStream);
    for (Map.Entry<String, String> entry : existedJarToMD5.entrySet()) {
      ReadWriteIOUtils.write(entry.getKey(), outputStream);
      ReadWriteIOUtils.write(entry.getValue(), outputStream);
    }
  }
Validate whether the trigger can be dropped.
iotdb-core/confignode/src/main/java/org/apache/iotdb/confignode/persistence/TriggerInfo.java