Class extends value undefined is not a constructor or null

[nagarajatantry]

Please answer these questions before submitting a bug report.

What version of OpenTelemetry are you using?

v0.11.0

Please provide the code you used to setup the OpenTelemetry SDK

I am using tracer-web example.

What did you do?

I am trying to play around with exporters. I tried out the opentelemetry-exporter-collector and it works as expected. i.e. i start seeing traces in backend collector. Then I tried the same with opentelemetry-exporter-collector-proto

What did you expect to see?

I expected the traces to be exported to my backend in protobuf format.

What did you see instead?

I see an error in console

CollectorExporterNodeBase.js?a322:23 Uncaught TypeError: Class extends value undefined is not a constructor or null
    at Object.eval (CollectorExporterNodeBase.js?a322:23)
    at eval (CollectorExporterNodeBase.js:56)
    at Object../node_modules/@opentelemetry/exporter-collector-proto/build/src/CollectorExporterNodeBase.js (document-load.js:1938)
    at __webpack_require__ (document-load.js:790)
    at fn (document-load.js:101)
    at eval (CollectorTraceExporter.js?d14e:19)
    at Object../node_modules/@opentelemetry/exporter-collector-proto/build/src/CollectorTraceExporter.js (document-load.js:1962)
    at __webpack_require__ (document-load.js:790)
    at fn (document-load.js:101)
    at eval (index.js?22ba:28)

Additional context

Add any other context about the problem here.

[vmarchaud]

/cc @obecny

[obecny]

tracer-web - proto and grpc is not supported in web so only opentelemetry-exporter-collector can be used in web, the proto and grpc is for node only

[nagarajatantry]

thank you @obecny
Is it something open for contribution?

Also I tried the proto in basic-tracer-node example I am getting the below error

> [email protected] start /Users/ntantry/dev/github.com/opentelemetry-js/examples/basic-tracer-node
> node ./index.js

/Users/ntantry/dev/github.com/opentelemetry-js/examples/basic-tracer-node/node_modules/protobufjs/src/root.js:104
            throw err;
            ^

Error: ENOENT: no such file or directory, open '/Users/ntantry/dev/github.com/opentelemetry-js/examples/basic-tracer-node/node_modules/@opentelemetry/exporter-collector-proto/build/protos/opentelemetry/proto/common/v1/common.proto'
    at Object.openSync (fs.js:465:3)
    at Object.readFileSync (fs.js:368:35)
    at fetch (/Users/ntantry/dev/github.com/opentelemetry-js/examples/basic-tracer-node/node_modules/protobufjs/src/root.js:172:34)
    at Root.load (/Users/ntantry/dev/github.com/opentelemetry-js/examples/basic-tracer-node/node_modules/protobufjs/src/root.js:206:13)
    at Root.loadSync (/Users/ntantry/dev/github.com/opentelemetry-js/examples/basic-tracer-node/node_modules/protobufjs/src/root.js:247:17)
    at onInit (/Users/ntantry/dev/github.com/opentelemetry-js/examples/basic-tracer-node/node_modules/@opentelemetry/exporter-collector-proto/build/src/util.js:35:28)
    at Immediate.<anonymous> (/Users/ntantry/dev/github.com/opentelemetry-js/examples/basic-tracer-node/node_modules/@opentelemetry/exporter-collector-proto/build/src/CollectorExporterNodeBase.js:31:13)
    at processImmediate (internal/timers.js:461:21) {

[obecny]

fix is here #1539

[obecny]

Is it something open for contribution?

Contributions are always welcome. It would be a separate package though, are you thinking about proto over xmlhttprequest or grpc as well ? It would require extra packages to be included which might be heavy for web. If you think this is something that can be useful please create a new issue and describe it. This way other people can comment it, thx

[nagarajatantry]

Sorry for the delay in response. Yes I am thinking about using proto over http1.1 as well as in future with grpc.
Will create a new issue and we can track it there.
Thank you

[DanielGorlo]

Might be joining the party late here but I was wondering if anyone got protobuf exporter to run from client side.