langchain.schema.output_parser。OutputParserException：获取无效的 JSON 对象。错误：额外数据：第 7 行第 1 列 （char 1406）

问：

对于以下代码片段，chain.run（） 字符串的输出出现间歇性 json 解析错误

查询 LLM 的 python 函数概述：-

    output_parser = StructuredOutputParser.from_response_schemas(response_schemas)
    format_instructions = output_parser.get_format_instructions()

template = """
Create a NIFI pipeline using standard NIFI processors. You can use a custom NIFI processor    only if it fits to the  examples given below. 
format the output as JSON with the following keys: pipelineDesription implementationSteps processorList connectorList """

prompt_template = PromptTemplate(input_variables=["question"], template=template, partial_variables={"format_instructions": format_instructions})
prompt_template.format(question=input_qa)
chain= LLMChain(llm=llm,prompt=prompt_template)
answer=chain.run( input_qa)
output_dict = output_parser.parse(answer)   =>   ERROR here 

错误详细信息：-

Traceback (most recent call last):
  File "D:\GenAI\adaptercopilot\venv\Lib\site-packages\langchain\output_parsers\json.py", line 86, in parse_and_check_json_markdown
    json_obj = parse_json_markdown(text)
               ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "D:\GenAI\adaptercopilot\venv\Lib\site-packages\langchain\output_parsers\json.py", line 68, in parse_json_markdown        
    parsed = json.loads(json_str)
             ^^^^^^^^^^^^^^^^^^^^
  File "D:\python\Lib\json\__init__.py", line 346, in loads
    return _default_decoder.decode(s)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "D:\python\Lib\json\decoder.py", line 340, in decode
    raise JSONDecodeError("Extra data", s, end)
json.decoder.JSONDecodeError: Extra data: line 7 column 1 (char 1406)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "D:\GenAI\adaptercopilot\Test.py", line 90, in <module>
    answer=(qaDataFlow(question))
            ^^^^^^^^^^^^^^^^^^^^
  File "D:\GenAI\adaptercopilot\adapterLLMModule\LLMModule.py", line 215, in qaDataFlow
    output_dict = output_parser.parse(answer)
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "D:\GenAI\adaptercopilot\venv\Lib\site-packages\langchain\output_parsers\structured.py", line 95, in parse
    return parse_and_check_json_markdown(text, expected_keys)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "D:\GenAI\adaptercopilot\venv\Lib\site-packages\langchain\output_parsers\json.py", line 88, in parse_and_check_json_markdolangchain.schema.output_parser.OutputParserException: Got invalid JSON object. Error: Extra data: line 7 column 1 (char 1406) 

当我检查 answer= chain.run（input_qa） 时，对于成功案例 print（answer） 给出

'''json { ...... } ``` 而对于不成功的情况，它打印（答案）给出 '''json { ...... } ``` \n''' 这在解析时标记为有额外数据。