nodejs-spanner: Error 13 INTERNAL: GOAWAY received

Environment details

• OS: CentOS
• Node.js version: v8.9.4
• npm version: v5.10.0
• @google-cloud/spanner version: v1.4.3

Steps to reproduce

1. ???
2. ???

Have an API which is using this library a lot for both read and write usage. Not sure what is currently causing this but will dig in more if needed. Getting a few hundred of these per day, seem to come in bursts.

Stack trace:

0: "Error: 13 INTERNAL: GOAWAY received"     
    1: "at Object.exports.createStatusError (/opt/app/node_modules/grpc/src/common.js:87:15)"     
    2: "at ClientReadableStream._emitStatusIfDone (/opt/app/node_modules/grpc/src/client.js:235:26)"     
    3: "at ClientReadableStream._receiveStatus (/opt/app/node_modules/grpc/src/client.js:213:8)"     
    4: "at Object.onReceiveStatus (/opt/app/node_modules/grpc/src/client_interceptors.js:1282:15)"     
    5: "at InterceptingListener._callNext (/opt/app/node_modules/grpc/src/client_interceptors.js:590:42)"     
    6: "at InterceptingListener.onReceiveStatus (/opt/app/node_modules/grpc/src/client_interceptors.js:640:8)"     
    7: "at /opt/app/node_modules/grpc/src/client_interceptors.js:1045:24"