[cy.session] cy.then() timed out after waiting 30000ms

[iskathi]

Current behavior

cy.session fails in very long tests (over 15 minutes in my case)

CypressError: `cy.then()` timed out after waiting `30000ms`.

Your callback function returned a promise that never resolved.

The callback function was:

async () => {
        if (!existingSession.hydrated) {
          const serverStoredSession = await sessions.getSession(existingSession.id).catch(lodash__WEBPACK_IMPORTED_MODULE_0___default.a.noop); // we have a saved session on the server AND setup matches

          if (serverStoredSession && serverStoredSession.setup === existingSession.setup.toString()) {
            lodash__WEBPACK_IMPORTED_MODULE_0___default.a.extend(existingSession, serverStoredSession);

            existingSession.hydrated = true;
          } else {
            onValidationError = throwValidationError;
            return runSetup(existingSession);
          }
        }

        Cypress.log({
          name: 'Restore Saved Session',
          event: true,
          state: 'passed',
          type: 'system',
          message: ``,
          groupStart: true
        });
        await navigateAboutBlank();

        _log.set({
          renderProps: () => {
            return {
              indicator: 'pending',
              message: `(saved) ${_log.get().message}`
            };
          }
        });

        dataLog.set({
          consoleProps: () => getConsoleProps(existingSession)
        });
        await sessions.setSessionData(existingSession);
      }
    at https://localhost:44301/__cypress/runner/cypress_runner.js:156066:83
From previous event:
    at Context.thenFn (https://localhost:44301/__cypress/runner/cypress_runner.js:156065:13)
    at Context.then (https://localhost:44301/__cypress/runner/cypress_runner.js:156509:21)
    at Context.<anonymous> (https://localhost:44301/__cypress/runner/cypress_runner.js:172859:19)
    at https://localhost:44301/__cypress/runner/cypress_runner.js:171717:15
From previous event:
    at CommandQueue.runCommand (https://localhost:44301/__cypress/runner/cypress_runner.js:171696:8)
    at next (https://localhost:44301/__cypress/runner/cypress_runner.js:171839:19)
From previous event:
    at next (https://localhost:44301/__cypress/runner/cypress_runner.js:171839:39)
    at https://localhost:44301/__cypress/runner/cypress_runner.js:171868:16

Desired behavior

Would be best if it did not fail

Test code to reproduce

I've managed to reproduce it with this tests after 2000 seconds

describe('sessions', () => {
    it('long', () => {
        cy.wrap(Cypress._.range(1, 200)).each((i: number) => {
            cy.session(`${i % 10}`, () => {
                cy.visit('https://www.tradingview.com/features/');
            });
            cy.visit('https://www.tradingview.com/news/');
            cy.wrap(Cypress._.range(1, 20)).each(() => {
                cy.get('[data-id="react-root"]').should('exist').should('be.visible');
            });
        });
    });
});

cypress.json

"redirectionLimit": 1000,

Cypress Version

9.3.1

Other

No response

[tbiethman]

@iskathi Thank you for the reproduction. I can confirm it produces posted error after running for some time.

[BlueWinds]

This doesn't seem to be related to cy.session, but rather the sheer number of assertions the test runs. The Cypress command log slows down heavily in large tests.

This is a real issue, and we're discussing how to fix it at the moment, but going to close as duplicate in favor of https://github.com/cypress-io/cypress/issues/4164, which contains links to other issues demonstrating the same slowdown without involving cy.origin.