Python Flask:InvokeHTTP引发IO异常。Java.net.SocketException:管道断开（写入失败）

Question

我有一个python脚本，它是使用NiFi（InvokeHttpPrcoessor）的python FlaskAPI调用的。我有时（并非总是）会出现以下错误

IO Exception thrown from InvokeHTTP. Java.net.SocketException: Broken pipe (Write failed)

这是我的主要任务

@app.route('/Customertax', methods = ['GET', 'POST'] )
def Customer_tax_main_f():
    outpath = Customer_tax.Customer_tax_f(request.data) 
    return send_file(outpath,"application/text")

这是我的.py代码，它具有主处理功能

def Customer_tax_f(file):
    other processing logic