14.1.0.beta2 fails to find imports in node_modules tree for vaadin-combo-box & vaadin-time-picker

When I do a Maven clean & install and then run my app from IntelliJ 2019.3 Ultimate edition EAP using external Tomcat 9.0.x, I see this message about missing vaadin-combo-box & vaadin-time-picker.

[RMI TCP Connection(2)-127.0.0.1] INFO dev-updater - 

  Failed to find the following imports in the `node_modules` tree:
      - @vaadin/vaadin-combo-box/src/vaadin-combo-box.js
      - @vaadin/vaadin-time-picker/src/vaadin-time-picker.js
  If the build fails, check that npm packages are installed.

  To fix the build remove `node_modules` directory to reset modules.
  In addition you may run `npm install` to fix `node_modules` tree structure.

Taking that advice to delete the node_modules folder from my project, and rebuild, does not help. The folder is recreated, but the error message appears again after a clean, install, and run.

I presume the failure above is the cause of further error messages:

[webpack] ERROR dev-webpack - ERROR in ../node_modules/@vaadin/flow-frontend/comboBoxConnector-es6.js
[webpack] ERROR dev-webpack - Module not found: Error: Can't resolve '@vaadin/vaadin-combo-box/src/vaadin-combo-box-placeholder.js' in '/Users/basilbourque/IdeaProjects/pics2go/node_modules/@vaadin/flow-frontend'
[webpack] ERROR dev-webpack -  @ ../node_modules/@vaadin/flow-frontend/comboBoxConnector-es6.js 4:0-99 7:36-55
[webpack] ERROR dev-webpack -  @ ../target/frontend/generated-flow-imports.js
[webpack] ERROR dev-webpack - 
[webpack] ERROR dev-webpack - ERROR in ../node_modules/@vaadin/flow-frontend/comboBoxConnector-es6.js
[webpack] ERROR dev-webpack - Module not found: Error: Can't resolve '@vaadin/vaadin-combo-box/src/vaadin-combo-box-placeholder.js' in '/Users/basilbourque/IdeaProjects/pics2go/node_modules/@vaadin/flow-frontend'
[webpack] ERROR dev-webpack -  @ ../node_modules/@vaadin/flow-frontend/comboBoxConnector-es6.js 4:0-99 7:36-55
[webpack] ERROR dev-webpack -  @ ../target/frontend/generated-flow-imports.js
[webpack] ERROR dev-webpack - ℹ ｢wdm｣: Failed to compile.
[webpack] ERROR dev-webpack - 
------------------ Frontend compilation failed. -----------------

[caalador]

This state could be reliably duplicated using the base-starter-spring with 14.1.0.rc1 by: • Run mvn spring-boot:run (things work as expected) • Stop the server • Delete folders node_modules and target • Run mvn package -Pproduction

This will for some reason leave the project in a state where we are missing vaadin-custom-field in the package-lock.json and thus it is not dowloaded to node_modules but only under the shrinkwrap targets.

to fix the situation a npm ddp or deletion of package-lock.json and target (should be fine with mvn clean package -Pproduction) should be done until an automatic solution can be found.

[Silock1]

This state could be reliably duplicated using the base-starter-spring with 14.1.0.rc1 by: • Run mvn spring-boot:run (things work as expected) • Stop the server • Delete folders node_modules and target • Run mvn package -Pproduction

This will for some reason leave the project in a state where we are missing vaadin-custom-field in the package-lock.json and thus it is not dowloaded to node_modules but only under the shrinkwrap targets.

to fix the situation a npm ddp or deletion of package-lock.json and target (should be fine with mvn clean package -Pproduction) should be done until an automatic solution can be found.

Thanks ! It worked for me.