Information during compilation sent to ErrorHandler. Why? Can this be avoided?

[mdmoura]

I implemented a custom ErrorHandler in Angular 9 to log errors to an API endpoint:

@Injectable()
export class GlobalErrorHandler extends ErrorHandler {

  constructor(private logService: LogApiService) {
    super();
  }

  handleError(error: any) {
    if (error instanceof Error) {
      try {
        let request: LogApiRequest = { 
          level: 'Error', 
          message: error.message,
          stack: error.stack
        };
        this.logService.send(request).subscribe();  
      } catch (error) {
        super.handleError(error);
      }
    }
    super.handleError(error);
  }
}

When I run the application I get a around 200 errors logged on the API like this one:

[webpack.Progress] 98% after emitting angular-compiler

I believe this is during compilation but it creates around 200 records on the database.

Should this messages be considered errors? Can this be avoided?

Angular Version:

Angular CLI: 9.1.1
Node: 13.5.0
OS: darwin x64

Angular: 9.1.1
... animations, cli, common, compiler, compiler-cli, core, forms
... language-service, platform-browser, platform-browser-dynamic
... platform-server, router
Ivy Workspace: Yes

Package                                    Version
--------------------------------------------------------------------
@angular-devkit/architect                  0.901.4
@angular-devkit/build-angular              0.901.4
@angular-devkit/build-optimizer            0.901.4
@angular-devkit/build-webpack              0.901.4
@angular-devkit/core                       9.1.4
@angular-devkit/schematics                 9.1.1
@ngtools/webpack                           9.1.4
@nguniversal/module-map-ngfactory-loader   8.1.1
@schematics/angular                        9.1.1
@schematics/update                         0.901.1
rxjs                                       6.5.5
typescript                                 3.8.3
webpack                                    4.42.0

[pkozlowski-opensource]

@mdmoura ideally we would need a reproduce scenario as there is not enough info here (how do you register error handler, do you build with the CLI or do you have any custom build extensions etc.). Could you please share a minimal GitHub repo demonstrating the issue?

Also, I'm a bit confused by the information you've provided since in the description you are mentioning Angular 9 while the version shared indicate Angular 8.

[mdmoura]

@pkozlowski-opensource Sorry, I copied the wrong Angular's version information on my first question. I just updated ...

I am registering the ErrorHandler in AppModule (Omitted imports, etc for simplicity):

@NgModule({
  providers: [
    { provide: ErrorHandler, useClass: GlobalErrorHandler }
  ],
  bootstrap: [AppComponent]
})

I created my Angular's project simply by using the ng new command.

When I created the ErrorHandler as I mentioned ... I will try to create a sample project.

[pkozlowski-opensource]

. I will try to create a sample project.

Yes, please! And please include exact commands you run to reproduce

[pkozlowski-opensource]

I'm going to close this issue for now as we haven't heard back with the reproduce scenario. Happy to re-open if / when we've got one.

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