yangyichao-mango opened a new issue #2922:
URL: https://github.com/apache/incubator-dolphinscheduler/issues/2922
**Describe the bug**
There is a Serde Exception in `TaskNode`, because we use Jackson UDSerde
`JSONUtils.JsonDataSerializer` and `JSONUtils.JsonDataDeserializer` in
`TaskNode` fields.
The UDSerde can convert "[]" to ""[]"" because the `JsonDataDeserializer`
node.toString() implement.
**To Reproduce**
Steps to reproduce the behavior, for example:
`public static void main(String[] args) {
String a =
"{\"conditionResult\":\"{\\\"successNode\\\":[\\\"\\\"],\\\"failedNode\\\":[\\\"\\\"]}\","
+
"\"conditionsTask\":false,\"depList\":[],\"dependence\":\"{}\",\"forbidden\":false,"
+
"\"id\":\"tasks-86823\",\"maxRetryTimes\":1,\"name\":\"shell test\","
+
"\"params\":\"{\\\"resourceList\\\":[],\\\"localParams\\\":[],\\\"rawScript\\\":\\\"echo
"
+
"'yyc'\\\"}\",\"preTasks\":\"[]\",\"retryInterval\":1,\"runFlag\":\"NORMAL\","
+
"\"taskInstancePriority\":\"HIGHEST\",\"taskTimeoutParameter\":{\"enable\":false,\"interval\":0},"
+
"\"timeout\":\"{}\",\"type\":\"SHELL\",\"workerGroup\":\"default\"}";
TaskNode taskNode = JSONUtils.parseObject(a, TaskNode.class);
}`
**Expected behavior**
`com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot
deserialize instance of `java.util.ArrayList` out of VALUE_STRING token
at [Source: (String)""[]""; line: 1, column: 1]`
**Screenshots**
**Which version of Dolphin Scheduler:**
-[1.3.0]
**Requirement or improvement
- We can remove the UDSerde `JSONUtils.JsonDataSerializer` and
`JSONUtils.JsonDataDeserializer` in JSONUtils.
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