Error has circular JSON structure

[hrsvrma]

HI,

Error returned/thrown from @elastic/elasticsearch@6 has circular structure hence it is difficult to stringify using JSON.stringify or send in API response (i.e. using express.js). The Error in legacy version is not circular though.

TypeError: Converting circular structure to JSON
at JSON.stringify ()

I am curious to know the reason behind circular structure of Error. And please suggest if there is a simple way to de-circle the Error circular structure.

Thanks

[delvedor]

Hello!
I'll open a pr to address this, but you should avoid sending the entire error message to your users, it will expose you to security vulnerabilities since the error object contains all the connection metadata and much more.

[delvedor]

Closed in #849.

[hrsvrma]

Hi Delvedor,

Thanks for the pr 😀.

I am not sending the entire error message to user as I too understand the security risk involved. This is just for development environment where I prefer to get error in API response instead of looking into server logs.