using "topic.exists()" raises "TypeError: Channel's second argument must be a ChannelCredentials"

[MohsenElgendy]

Environment details

• OS: Ubuntu 16.04
• Node.js version: 9.3.0
• npm version: 5.5.1
• @google-cloud/pubsub version: 0.16.1

Steps to reproduce

1. Setup PubSub emulator and set PUBSUB_EMULATOR_HOST
2. run topic.exists()

This issue does not happen with PubSub version 0.15.0, when upgrading to 0.16.* and calling topic.exists() the following error occur:

[0] (node:48) UnhandledPromiseRejectionWarning: TypeError: Channel's second argument must be a ChannelCredentials
[0]     at ServiceClient.Client (/usr/src/app/node_modules/google-gax/node_modules/grpc/src/client.js:472:19)
[0]     at new ServiceClient (/usr/src/app/node_modules/google-gax/node_modules/grpc/src/client.js:884:12)
[0]     at /usr/src/app/node_modules/google-gax/lib/grpc.js:245:12
[0]     at <anonymous>
[0]     at process._tickCallback (internal/process/next_tick.js:160:7)
[0]     at Function.Module.runMain (module.js:703:11)
[0]     at startup (bootstrap_node.js:194:16)
[0]     at bootstrap_node.js:618:3
[0] (node:48) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
[0] (node:48) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

Thanks!

[stephenplusplus]

Would you mind doing a full un- and re-installation of your project's node_modules (rm -rf node_modules && npm install). If that still doesn't work, try npm cache clean --force before the command.

[MohsenElgendy]

Every time I try, I build a new Docker image, that means it is a clean install and I also tried the cache clean and it did not work. Could it be a problem with the Emulator version it self ?

[fardog]

I'm seeing this issue as well; an npm cache clean --force did not change the behavior, nor did whacking the package-lock.json and regenerating it from an npm install unfortunately.

{ '<redacted>': '1.2.0',
  npm: '5.5.1',
  ares: '1.10.1-DEV',
  cldr: '31.0.1',
  http_parser: '2.7.0',
  icu: '59.1',
  modules: '57',
  nghttp2: '1.25.0',
  node: '8.9.1',
  openssl: '1.0.2m',
  tz: '2017b',
  unicode: '9.0',
  uv: '1.15.0',
  v8: '6.1.534.47',
  zlib: '1.2.11' }

Let me know if i can provide any additional information.

Edit: the installation of pubsub was into a project that hasn't previously had any google cloud libraries intalled in it; it was installed with an npm install @google-cloud/pubsub which got me version 0.16.1; for the sake of getting things rolling, I tried an older version by specifying 0.15.0 and that version is working fine against the emulator.

[stephenplusplus]

This sounds like a problem with multiple versions of gRPC loading. I believe I've found the issue, and will be sending a PR soon.

[stephenplusplus]

0.16.2 is out! Please let me know if there are still any issues.

[MohsenElgendy]

Seamless, Great work!

[giltayar]

Thanks. This solved my problem. Just wanted to let you know that there are no prebuilt binaries for node 8 (at least for the version I'm using) and grpc-1.7.3. This makes my docker build times really long...

Is there any way I can know what prebuilt binaries there are for this version of grpc and node, so I can fine tune the node version?

[ncjones]

@giltayar Are you using Alpine? I think this is related to glibc vs musl (grpc/grpc#6850). For this and other reasons we switched from Alpine back to Debian and we are able to use prebuilt grpc binaries (using pubsub 0.16.2).

[giltayar]

Yes, I am. Ahhh.... thank you. I'll switch back to the regular debian. Thanks!

Although, given the love a lot of people have for Alpine, it would be nice to have prebuilt binaries for them too... 😉

[cmdshepard]

@stephenplusplus I'm experiencing the same issue with 0.16.3 when I downgrade to 0.16.2, I no longer get the error.

I'm trying to connect to the pubsub emulator.

OS: macOS 10.13.3
Node.js version: 8.7.0
npm version: 5.4.2
Yarn version: 1.3.2
version: 0.16.3

This is the error that I get on 0.16.3

TypeError: Channel's second argument must be a ChannelCredentials
    at ServiceClient.Client (/Users/mazahmadi/microservices/financial-processing-service/node_modules/google-gax/node_modules/grpc/src/client.js:472:19)
    at new ServiceClient (/Users/mazahmadi/microservices/financial-processing-service/node_modules/google-gax/node_modules/grpc/src/client.js:884:12)
    at /Users/mazahmadi/microservices/financial-processing-service/node_modules/google-gax/lib/grpc.js:251:12
    at <anonymous>
    at process._tickDomainCallback (internal/process/next_tick.js:228:7)
    at Function.Module.runMain (module.js:667:11)
    at Object.<anonymous> (/Users/mazahmadi/microservices/financial-processing-service/node_modules/babel-cli/lib/_babel-node.js:154:22)
    at Module._compile (module.js:624:30)
    at Object.Module._extensions..js (module.js:635:10)
    at Module.load (module.js:545:32)
    at tryModuleLoad (module.js:508:12)
    at Function.Module._load (module.js:500:3)
    at Function.Module.runMain (module.js:665:10)
    at startup (bootstrap_node.js:187:16)
    at bootstrap_node.js:608:3

[crivera]

I have the same issue in version 0.28.0

const pubsub = require('@google-cloud/pubsub')
const grpc = require('grpc')

const client = new pubsub.v1.SubscriberClient({
  servicePath: 'localhost',
  port: 8085,
  sslCreds: grpc.credentials.createInsecure()
})

Any help would be appreciated. Node 8.11.3

(node:39711) UnhandledPromiseRejectionWarning: TypeError: Channel's second argument must be a ChannelCredentials

[zombieleet]

@crivera Were you still able to fix this ?