amazon web services – aws lambda funtion call axios appsync error ECONNRESET

my lambda function call appsync through the axios and sometime it has error ECONNRESET:
sendGraphqlToAppSync axios failed : {“message”:”read ECONNRESET”,”name”:”Error”,”stack”:”Error: read ECONNRESET\n at TLSWrap.onStreamRead (internal/stream_base_commons.js:209:20)”,…
I read some answers then this may me error by internet client TCP conversation abruptly closed its end of the connection.
But I call appsync through the lambda function.
please let me know what is error and how to fix this.
Thank you.