Bug: Intermittent browser/components/downloads/test/browser/browser_pdfjs_preview.js | Found a tab after previous test timed out: about:downloads -  | Test timed out -
Status: RESOLVED
Priority: P5
Resolution: INCOMPLETE
Created: 2020-05-21 20:35:58+00:00
Resolved: 2021-12-28 17:01:21+00:00

**Filed by:** btara [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer.html#?job_id=303260499&repo=autoland
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/Y52Ykt8DTF6kg9tJCziTlg/runs/0/artifacts/public/logs/live_backing.log

---

```
...
[task 2020-05-21T19:49:26.335Z] 19:49:26     INFO - Executing user events
[task 2020-05-21T19:49:26.335Z] 19:49:26     INFO - selectedBrowser has currentURI: about:downloads
[task 2020-05-21T19:49:26.336Z] 19:49:26     INFO - TEST-PASS | browser/components/downloads/test/browser/browser_pdfjs_preview.js | undefined assertion name - 
[task 2020-05-21T19:49:26.336Z] 19:49:26     INFO - TEST-PASS | browser/components/downloads/test/browser/browser_pdfjs_preview.js | Download item target exists - {} == true - 
[task 2020-05-21T19:49:26.336Z] 19:49:26     INFO - Waiting for double-click content task
[task 2020-05-21T19:49:26.336Z] 19:49:26     INFO - /Executing user events
[task 2020-05-21T19:49:26.336Z] 19:49:26     INFO - Waiting for previewHappened
[task 2020-05-21T19:49:26.336Z] 19:49:26     INFO - Buffered messages finished
[task 2020-05-21T19:49:26.336Z] 19:49:26     INFO - TEST-UNEXPECTED-FAIL | browser/components/downloads/test/browser/browser_pdfjs_preview.js | Test timed out - 
[task 2020-05-21T19:49:26.336Z] 19:49:26     INFO - GECKO(6324) | MEMORY STAT | vsize 19406465MB | vsizeMaxContiguous 66050235MB | residentFast 1513MB
[task 2020-05-21T19:49:26.337Z] 19:49:26     INFO - TEST-OK | browser/components/downloads/test/browser/browser_pdfjs_preview.js | took 90183ms
[task 2020-05-21T19:49:26.337Z] 19:49:26     INFO - Not taking screenshot here: see the one that was previously logged
[task 2020-05-21T19:49:26.337Z] 19:49:26     INFO - TEST-UNEXPECTED-FAIL | browser/components/downloads/test/browser/browser_pdfjs_preview.js | Found a tab after previous test timed out: about:downloads - 
[task 2020-05-21T19:49:26.355Z] 19:49:26     INFO - checking window state
[task 2020-05-21T19:49:27.975Z] 19:49:27     INFO - GECKO(6324) | Completed ShutdownLeaks collections in process 8676
[task 2020-05-21T19:49:27.975Z] 19:49:27     INFO - GECKO(6324) | Completed ShutdownLeaks collections in process 6360
[task 2020-05-21T19:49:27.994Z] 19:49:27     INFO - GECKO(6324) | Completed ShutdownLeaks collections in process 3848
[task 2020-05-21T19:49:28.013Z] 19:49:28     INFO - GECKO(6324) | Completed ShutdownLeaks collections in process 6552
[task 2020-05-21T19:49:28.084Z] 19:49:28     INFO - GECKO(6324) | Completed ShutdownLeaks collections in process 6676
[task 2020-05-21T19:49:29.245Z] 19:49:29     INFO - GECKO(6324) | Completed ShutdownLeaks collections in process 6836
[task 2020-05-21T19:49:29.245Z] 19:49:29     INFO - TEST-START | Shutdown
[task 2020-05-21T19:49:29.245Z] 19:49:29     INFO - Browser Chrome Test Summary
[task 2020-05-21T19:49:29.245Z] 19:49:29     INFO - Passed:  161
[task 2020-05-21T19:49:29.245Z] 19:49:29     INFO - Failed:  2
[task 2020-05-21T19:49:29.245Z] 19:49:29     INFO - Todo:    0
[task 2020-05-21T19:49:29.246Z] 19:49:29     INFO - Mode:    e10s
[task 2020-05-21T19:49:29.246Z] 19:49:29     INFO - *** End BrowserChrome Test Results ***
[task 2020-05-21T19:49:29.714Z] 19:49:29     INFO - GECKO(6324) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2020-05-21T19:49:29.719Z] 19:49:29     INFO - GECKO(6324) | ###!!! [Parent][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2020-05-21T19:49:30.298Z] 19:49:30     INFO - GECKO(6324) | 1590090570291	Marionette	TRACE	Received observer notification xpcom-will-shutdown
[task 2020-05-21T19:49:30.298Z] 19:49:30     INFO - GECKO(6324) | 1590090570291	Marionette	INFO	Stopped listening on port 2828
[task 2020-05-21T19:49:30.298Z] 19:49:30     INFO - GECKO(6324) | 1590090570292	Marionette	DEBUG	Marionette stopped listening
[task 2020-05-21T19:49:30.338Z] 19:49:30     INFO - GECKO(6324) | ###!!! [Child][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2020-05-21T19:49:31.572Z] 19:49:31     INFO - TEST-INFO | Main app process: exit 0
[task 2020-05-21T19:49:31.572Z] 19:49:31     INFO - runtests.py | Application ran for: 0:02:32.802000
```