License service: possible memory leak

[sebelga]

From my comment: #57295 (comment)
we might have a memory leak on the License service that subscribes to license check but never unsubscribe.

licensing.license$.subscribe(license => {
  const { state, message } = license.check(pluginId, minimumLicenseType);
  const hasRequiredLicense = state === LICENSE_CHECK_STATE.Valid;

  if (hasRequiredLicense) {
    this.licenseStatus = { isValid: true };
  } else {
    this.licenseStatus = {
      isValid: false,
      message: message || defaultErrorMessage,
    };
    if (message) {
      logger.info(message);
    }
  }
});

[elasticmachine]

Pinging @elastic/es-ui (Team:Elasticsearch UI)

[cjcenizal]

@sebelga Is this issue still valid? If so, could you add details in the description regarding the affected app and the file that contains this code? Could you also add a feature label? Thanks!

[cjcenizal]

I looked in this and found that the lifecycle methods are only called when the Kibana server starts up, so we won't create a leak in this case.