/usr/local/lib/node_modules/pino-gelf/lib/transformer/standard-gelf.js:7
short_message: data.msg.substring(0, 65),
^
TypeError: Cannot read property 'substring' of undefined
at module.exports (/usr/local/lib/node_modules/pino-gelf/lib/transformer/standard-gelf.js:7:29)
at /usr/local/lib/node_modules/pino-gelf/lib/transformer/index.js:9:26
at DestroyableTransform._transform (/usr/local/lib/node_modules/pino-gelf/lib/pipeline.js:12:23)
at DestroyableTransform.Transform._read (/usr/local/lib/node_modules/pino-gelf/node_modules/through2/node_modules/readable-stream/lib/_stream_transform.js:184:10)
at DestroyableTransform.Transform._write (/usr/local/lib/node_modules/pino-gelf/node_modules/through2/node_modules/readable-stream/lib/_stream_transform.js:172:83)
at doWrite (/usr/local/lib/node_modules/pino-gelf/node_modules/through2/node_modules/readable-stream/lib/_stream_writable.js:428:64)
at writeOrBuffer (/usr/local/lib/node_modules/pino-gelf/node_modules/through2/node_modules/readable-stream/lib/_stream_writable.js:417:5)
at DestroyableTransform.Writable.write (/usr/local/lib/node_modules/pino-gelf/node_modules/through2/node_modules/readable-stream/lib/_stream_writable.js:334:11)
at Transform.ondata (/usr/local/lib/node_modules/pino-gelf/node_modules/readable-stream/lib/_stream_readable.js:639:20)
at emitOne (events.js:116:13)
events.js:183
throw er; // Unhandled 'error' event
^
Occasionally getting this error: