1638254 - Intermittent TEST-UNEXPECTED-CRASH | /encoding/legacy-mb-korean/<something> | expected OK followed or not by crash in /html/syntax/parsing<something>

Status: RESOLVED FIXED

(Core :: Widget: Gtk, defect, P5)

Description

[Treeherder Bug Filer]

Filed by: apavel [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer.html#?job_id=302394407&repo=autoland
Full log: https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/Fs9s3db8TU-2BcgORU9wLA/runs/0/artifacts/public/logs/live_backing.log

---

[task 2020-05-15T03:33:24.814Z] 03:33:24 INFO - TEST-START | /encoding/legacy-mb-korean/euc-kr/euckr-encode-form-ks_c_5601-1987.html?17001-last
[task 2020-05-15T03:33:24.814Z] 03:33:24 INFO - Closing window 589
[task 2020-05-15T03:33:24.923Z] 03:33:24 INFO - PID 25875 | Maximum number of clients reachedMaximum number of clients reachedMaximum number of clients reachedUnable to init server: Could not connect: Connection refused
[task 2020-05-15T03:33:24.924Z] 03:33:24 INFO - PID 25875 | (/builds/worker/workspace/build/application/firefox/firefox-bin:25638): Gtk-WARNING **: 03:33:24.914: cannot open display: :0
[task 2020-05-15T03:33:24.925Z] 03:33:24 INFO - PID 25875 | [Parent 25875, Gecko_IOThread] WARNING: FileDescriptorSet destroyed with unconsumed descriptors: file /builds/worker/checkouts/gecko/ipc/chromium/src/chrome/common/file_descriptor_set_posix.cc, line 19
[task 2020-05-15T03:33:24.925Z] 03:33:24 INFO - PID 25875 | [Parent 25875, Gecko_IOThread] WARNING: FileDescriptorSet destroyed with unconsumed descriptors: file /builds/worker/checkouts/gecko/ipc/chromium/src/chrome/common/file_descriptor_set_posix.cc, line 19
[task 2020-05-15T03:33:24.925Z] 03:33:24 INFO - PID 25875 | [Parent 25875, Gecko_IOThread] WARNING: FileDescriptorSet destroyed with unconsumed descriptors: file /builds/worker/checkouts/gecko/ipc/chromium/src/chrome/common/file_descriptor_set_posix.cc, line 19
[task 2020-05-15T03:33:24.928Z] 03:33:24 INFO - PID 25875 | [Parent 25875, Gecko_IOThread] WARNING: FileDescriptorSet destroyed with unconsumed descriptors: file /builds/worker/checkouts/gecko/ipc/chromium/src/chrome/common/file_descriptor_set_posix.cc, line 19
[task 2020-05-15T03:33:24.929Z] 03:33:24 INFO - PID 25875 | [Parent 25875, Gecko_IOThread] WARNING: FileDescriptorSet destroyed with unconsumed descriptors: file /builds/worker/checkouts/gecko/ipc/chromium/src/chrome/common/file_descriptor_set_posix.cc, line 19
[task 2020-05-15T03:33:24.929Z] 03:33:24 INFO - PID 25875 | [Parent 25875, Gecko_IOThread] WARNING: FileDescriptorSet destroyed with unconsumed descriptors: file /builds/worker/checkouts/gecko/ipc/chromium/src/chrome/common/file_descriptor_set_posix.cc, line 19
[task 2020-05-15T03:33:24.931Z] 03:33:24 INFO - PID 25875 | A content process crashed and MOZ_CRASHREPORTER_SHUTDOWN is set, shutting down
[task 2020-05-15T03:33:25.077Z] 03:33:25 INFO - NoSuchWindowException on command, setting status to CRASH
[task 2020-05-15T03:33:25.108Z] 03:33:25 INFO - TEST-UNEXPECTED-CRASH | /encoding/legacy-mb-korean/euc-kr/euckr-encode-form-ks_c_5601-1987.html?17001-last | expected OK
[task 2020-05-15T03:33:25.109Z] 03:33:25 INFO - TEST-INFO took 371ms
[task 2020-05-15T03:33:25.170Z] 03:33:25 INFO - ....
[task 2020-05-15T03:33:25.170Z] 03:33:25 INFO - TEST-OK | /html/syntax/parsing/html5lib_isindex.html?run_type=write | took 520ms
[task 2020-05-15T03:33:25.171Z] 03:33:25 INFO - TEST-START | /html/syntax/parsing/html5lib_isindex.html?run_type=uri
[task 2020-05-15T03:33:25.172Z] 03:33:25 INFO - Closing window 109
[task 2020-05-15T03:33:25.288Z] 03:33:25 INFO - PID 25875 | 1589513605279 Marionette INFO Stopped listening on port 47748
[task 2020-05-15T03:33:25.425Z] 03:33:25 INFO - Browser exited with return code 0
[task 2020-05-15T03:33:25.425Z] 03:33:25 INFO - PROCESS LEAKS None
[task 2020-05-15T03:33:25.426Z] 03:33:25 INFO - Closing logging queue
[task 2020-05-15T03:33:25.426Z] 03:33:25 INFO - queue closed
[task 2020-05-15T03:33:25.539Z] 03:33:25 INFO - ....
[task 2020-05-15T03:33:25.539Z] 03:33:25 INFO - TEST-OK | /html/syntax/parsing/html5lib_isindex.html?run_type=uri | took 368ms

Comment 1

[Andreea Pavel [:apavel]]

Hi Jonathan, there are some wpt failures regarding encoding that showed up on the tree recently:

Some have just one crash: https://treeherder.mozilla.org/logviewer.html#/jobs?job_id=302394407&repo=autoland&lineNumber=6331
Some have a crash in /html/syntax/parsing/<something> before the encoding crash: https://treeherder.mozilla.org/logviewer.html#/jobs?job_id=302394429&repo=autoland&lineNumber=6347

Retriggers: https://treeherder.mozilla.org/#/jobs?repo=autoland&group_state=expanded&resultStatus=pending%2Crunning%2Csuccess%2Ctestfailed%2Cbusted%2Cexception&searchStr=linux%2C18.04%2Cx64%2Cshippable%2Copt%2Cweb%2Cplatform%2Ctests%2Ctest-linux1804-64-shippable%2Fopt-web-platform-tests-e10s-4%2Cw%28wpt4%29&tochange=4516108eef2b87a2ced90ec8e177304f2ad75774&fromchange=85a07c4132a349369d692666ebd1ef667c6a01ee&selectedTaskRun=UM_N_oOMS1yXHvgAbUogww-0

Can you please take a look?

Also, can we use this as a general bug for those failures?

Comment 2

[Jonathan Kew [:jfkthame]]

It looks to me like this doesn't really have anything to do with the specific encoding test, what's actually happening is some kind of X-windows resource exhaustion:

[task 2020-05-15T03:33:24.923Z] 03:33:24 INFO - PID 25875 | Maximum number of clients reachedMaximum number of clients reachedMaximum number of clients reachedUnable to init server: Could not connect: Connection refused

Note "Maximum number of clients reached", which I believe refers to X clients. Then we have a warning from Gtk, "cannot open display", which presumably is because of the X-windows failure. Which leads to "A content process crashed", without really getting to run the testcase at all.

Not sure where this belongs -- maybe Widget:Gtk?

Comment 3

[Sebastian Hengst [:aryx] (needinfo me if it's about an intermittent or backout)]

Edwin, have you observed this behavior before?

Comment 4

[Edwin Takahashi (:egao | infrequent contributor)]

No, I have not seen this before.

Comment 5

[Sebastian Hengst [:aryx] (needinfo me if it's about an intermittent or backout)]

Could it be related to bug 1637085? It landed directly before it started and got backed out after this ended?

Comment 6

[Sebastian Hengst [:aryx] (needinfo me if it's about an intermittent or backout)]

Try push with bug 1637085 applied didn't reproduce the issue.

Comment 7

[Narcis Beleuzu [:NarcisB]]

Retriggs are pointing to Bug 1637085
https://treeherder.mozilla.org/#/jobs?repo=autoland&searchStr=Linux%2C18.04%2Cx64%2Cshippable%2Copt%2CWeb%2Cplatform%2Ctests%2Ctest-linux1804-64-shippable%2Fopt-web-platform-tests-e10s-4%2CW%28wpt4%29&tochange=1bd7b87768127dcaeb8b8844f2e1d175e277208b&fromchange=566430349999f5c1eb844ea6e01f9ef349258986&selectedTaskRun=N-8zmXyeTbOwipVO3wsPXg-0

Comment 8

[Cristina Coroiu [:ccoroiu]]

This was backed out for frequent failures here: https://hg.mozilla.org/integration/autoland/rev/31e3dab240a28c162943acad26fb543c54144dc0
Please check this comment: https://bugzilla.mozilla.org/show_bug.cgi?id=1637085#c3
No new failures since the backout was pushed.

Comment 9

[Intermittent Failures Robot]

47 failures in 5488 pushes (0.009 failures/push) were associated with this bug in the last 7 days.

This is the #33 most frequent failure this week.

** This failure happened more than 30 times this week! Resolving this bug is a high priority. **

** Try to resolve this bug as soon as possible. If unresolved for 2 weeks, the affected test(s) may be disabled. **

Repository breakdown:

• autoland: 47

Platform breakdown:

• linux1804-64-shippable: 47

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1638254&startday=2020-05-11&endday=2020-05-17&tree=all