10.10 talos runs frequently fail with "FAIL: Graph server unreachable (5 attempts)" due to "RETURN:[Errno 8] nodename nor servname provided, or not known"

RESOLVED FIXED

Status

Infrastructure & Operations
CIDuty
RESOLVED FIXED
3 years ago
2 months ago

People

(Reporter: philor, Unassigned)

Tracking

Details

(Reporter)

Description

3 years ago
Unlike so many instances of "FAIL: Graph server unreachable (5 attempts)", this apparently really is an unreachable problem, because... DNS goes away? 10.10 caches a bad DNS lookup instead of trying again?

https://treeherder.mozilla.org/logviewer.html#?job_id=5045963&repo=try

11:49:09 CRITICAL - FAIL: Graph server unreachable (5 attempts)
11:49:09 INFO - RETURN:[Errno 8] nodename nor servname provided, or not known
11:49:09 ERROR - Traceback (most recent call last):
11:49:09 INFO - File "/builds/slave/talos-slave/test/build/venv/bin/talos", line 9, in <module>
11:49:09 INFO - load_entry_point('talos==0.0', 'console_scripts', 'talos')()
11:49:09 INFO - File "/builds/slave/talos-slave/test/build/venv/lib/python2.7/site-packages/talos/run_tests.py", line 302, in main
11:49:09 INFO - sys.exit(run_tests(parser))
11:49:09 INFO - File "/builds/slave/talos-slave/test/build/venv/lib/python2.7/site-packages/talos/run_tests.py", line 276, in run_tests
11:49:09 INFO - talos_results.output(results_urls, **results_options)
11:49:09 INFO - File "/builds/slave/talos-slave/test/build/venv/lib/python2.7/site-packages/talos/results.py", line 87, in output
11:49:09 INFO - raise e
11:49:09 INFO - talos.utils.TalosError: Graph server unreachable (5 attempts)
11:49:09 INFO - [Errno 8] nodename nor servname provided, or not known
11:49:09 ERROR - Return code: 1
11:49:09 CRITICAL - # TBPL WARNING #

Comment 1

3 years ago
I suspect this is part of the jobs that are getting starred into 1124697
(Reporter)

Comment 2

3 years ago
The current batch? No, those are graphserver returning "Service Unavailable", as of just recently, while this is what the 10.10 slaves have done for as long as they've existed, not contacting it at all.

"Graph server unreachable" is nearly without meaning, it's the highlighted error for absolutely every single failure which results from anything happening other than graphserver returning whatever it is that it returns for success. If you send two values when you should send three, "GSU." If you are a slave that graphserver doesn't know by name, "GSU." If you are a new platform which loses the ability to resolve graphs.mozilla.org periodically, "GSU." If graphs.m.o actually really is unreachable, "GSU." If it's perfectly reachable, but returns an error of any sort including 503, "GSU."

Comment 3

3 years ago
There are reports of significant dns issues in 10.10, let's see if reimaging them as 10.10.2 in bug 1134223
(once we get the issues with the image sorted) addresses the issue.

Updated

3 years ago
Blocks: 1134223
(Reporter)

Updated

3 years ago
Keywords: intermittent-failure
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Kim, this seems to be pretty frequent now on 10.10
Flags: needinfo?(kmoir)
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