Parse error crashing app

[cmoncrief]

I'm getting the following errors a couple of times per day. I updated to the latest agent version yesterday in hopes that it would fix it, but it has happened again today.

First we get this:

Error: Parse Error
Stack: Error: Parse Error
at Socket.socketOnData (http.js:1583:20)
at TCP.onread (net.js:527:27)
at TCP.<anonymous> (/app/node_modules/newrelic/node_modules/continuation-local-storage/node_modules/async-listener/glue.js:177:31)

Followed immediately by:

 SyntaxError: Unexpected end of input
 Stack: SyntaxError: Unexpected end of input
 at Object.parse (native)
 at IncomingMessage.<anonymous> (/app/lib/server/controllers/app/socket-rates.js:143:30)
at IncomingMessage.emit (events.js:95:17)
at IncomingMessage.<anonymous> (_stream_readable.js:748:14)
at IncomingMessage.emit (events.js:92:17)
at emitReadable_ (_stream_readable.js:410:10)
at emitReadable (_stream_readable.js:406:5)
at readableAddChunk (_stream_readable.js:168:9)
at IncomingMessage.Readable.push (_stream_readable.js:130:10)
at HTTPParser.parserOnBody [as onBody] (http.js:142:22)

We're running Express 3.5 on Heroku and the NR agent is required on line 1.

[groundwater]

Hi @cmoncrief, the second error looks like it's being emitted here /app/lib/server/controllers/app/socket-rates.js. Can you share what's at line 143?

[cmoncrief]

I missed that completely when I opened this. There's a JSON.parse on that source line which is throwing. This looks like it's on our side, sorry for the trouble!

[groundwater]

No worries 😄