Page MenuHomePhabricator
Create Task
Maniphest T212631

Kademlia rate limiter failing unexpectedly
Closed, ResolvedPublic
Actions

Description

The kademlia rate limiter started failing and bringing down RESTBase since this occurs in the master process. The error trace is:

TypeError: Cannot read property 'publisher' of null
    at Readable.<anonymous> (/srv/deployment/restbase/deploy-cache/revs/55fcd4be9d0c72ddf4b826813a6354249a5c3f64/node_modules/kad/lib/node.js:239:13)
    at emitOne (events.js:96:13)
    at Readable.emit (events.js:188:7)
    at addChunk (/srv/deployment/restbase/deploy-cache/revs/55fcd4be9d0c72ddf4b826813a6354249a5c3f64/node_modules/limitation/node_modules/readable-stream/lib/_stream_readable.js:291:12)
    at readableAddChunk (/srv/deployment/restbase/deploy-cache/revs/55fcd4be9d0c72ddf4b826813a6354249a5c3f64/node_modules/limitation/node_modules/readable-stream/lib/_stream_readable.js:278:11)
    at Readable.push (/srv/deployment/restbase/deploy-cache/revs/55fcd4be9d0c72ddf4b826813a6354249a5c3f64/node_modules/limitation/node_modules/readable-stream/lib/_stream_readable.js:245:10)
    at Immediate.pushItem (/srv/deployment/restbase/deploy-cache/revs/55fcd4be9d0c72ddf4b826813a6354249a5c3f64/node_modules/limitation/lib/decaying_counter_store.js:130:24)
    at runCallback (timers.js:672:20)
    at tryOnImmediate (timers.js:645:5)
    at processImmediate [as _immediateCallback] (timers.js:617:5)

It started on 2018-11-26T00:06:59 and has happened a total of 74 times as of 2018-12-26T18:16:00.

Details

SubjectRepoBranchLines +/-
Bump service-runner version to v2.6.9mediawiki/services/cxservermaster+1 -1
Customize query in gerrit

Related Objects

Event Timeline

• mobrovac triaged this task as High priority.Dec 26 2018, 6:17 PM
• mobrovac created this task.
Restricted Application added a subscriber: Aklapper. · View Herald TranscriptDec 26 2018, 6:17 PM
• mobrovac edited projects, added Services (doing), Platform Team Workboards (Doing); removed Platform Team Legacy (Next), Services (next).Dec 26 2018, 7:33 PM

Ok, I tracked down the problem to the kad library. In order to have the fix in place, the following patches need to be merged (in this order):

Obviously, a more sustainable solution needs to be found, all of the above is just a temporary fix.

• mobrovac claimed this task.Dec 26 2018, 7:34 PM
• Pchelolo added a comment.Dec 26 2018, 10:28 PM

Even though this is just a workaround, we want to replace the fork with upstream ASAP, so this would be good enough to stop the bleeding. I approve this message!

gerritbot subscribed.Dec 27 2018, 5:05 PM

Change 481491 had a related patch set uploaded (by Mobrovac; owner: Mobrovac):
[mediawiki/services/cxserver@master] Bump service-runner version to v2.6.9

https://gerrit.wikimedia.org/r/481491

gerritbot added a project: Patch-For-Review.Dec 27 2018, 5:05 PM
KartikMistry added a subscriber: Nikerabbit.Dec 27 2018, 5:12 PM
KartikMistry subscribed.
Stashbot subscribed.Dec 27 2018, 5:15 PM

Mentioned in SAL (#wikimedia-operations) [2018-12-27T17:15:54Z] <mobrovac@deploy1001> Started deploy [restbase/deploy@ae7a537]: Fix rate-limiter crash - T212631 - deploy only on canary restbase1007

Stashbot added a comment.Dec 27 2018, 5:20 PM

Mentioned in SAL (#wikimedia-operations) [2018-12-27T17:20:18Z] <mobrovac@deploy1001> Finished deploy [restbase/deploy@ae7a537]: Fix rate-limiter crash - T212631 - deploy only on canary restbase1007 (duration: 04m 24s)

Stashbot added a comment.Dec 27 2018, 5:50 PM

Mentioned in SAL (#wikimedia-operations) [2018-12-27T17:50:18Z] <mobrovac@deploy1001> Started deploy [restbase/deploy@70c4752]: Fix rate-limiter crash - T212631

Stashbot added a comment.Dec 27 2018, 6:03 PM

Mentioned in SAL (#wikimedia-operations) [2018-12-27T18:03:28Z] <mobrovac@deploy1001> deploy aborted: Fix rate-limiter crash - T212631 (duration: 13m 09s)

Stashbot added a comment.Dec 27 2018, 6:04 PM

Mentioned in SAL (#wikimedia-operations) [2018-12-27T18:04:06Z] <mobrovac@deploy1001> Started deploy [restbase/deploy@a67f38e]: Fix rate-limiter crash (with increased deploy delays) - T212631

Stashbot added a comment.Dec 27 2018, 6:04 PM

Mentioned in SAL (#wikimedia-operations) [2018-12-27T18:04:15Z] <mobrovac@deploy1001> deploy aborted: Fix rate-limiter crash (with increased deploy delays) - T212631 (duration: 00m 09s)

Stashbot added a comment.Dec 27 2018, 6:04 PM

Mentioned in SAL (#wikimedia-operations) [2018-12-27T18:04:24Z] <mobrovac@deploy1001> Started deploy [restbase/deploy@a67f38e]: Fix rate-limiter crash (with increased deploy delays) - T212631

Stashbot added a comment.Dec 27 2018, 6:15 PM

Mentioned in SAL (#wikimedia-operations) [2018-12-27T18:15:44Z] <mobrovac@deploy1001> Finished deploy [restbase/deploy@a67f38e]: Fix rate-limiter crash (with increased deploy delays) - T212631 (duration: 11m 20s)

• mobrovac closed this task as Resolved.Dec 27 2018, 7:31 PM
• mobrovac edited projects, added Services (done), Platform Team Workboards (Done with CPT); removed Platform Team Workboards (Doing), Services (doing).

RESTBase has been deployed. Resolving.

gerritbot added a comment.Dec 28 2018, 3:46 AM

Change 481491 merged by jenkins-bot:
[mediawiki/services/cxserver@master] Bump service-runner version to v2.6.9

https://gerrit.wikimedia.org/r/481491

• mobrovac removed a project: Patch-For-Review.Dec 28 2018, 10:14 AM
• Pchelolo mentioned this in T200374: Update indirect dependency on github.com/gwicke/kad.git.Jan 15 2019, 7:19 PM
Content licensed under Creative Commons Attribution-ShareAlike (CC BY-SA) 4.0 unless otherwise noted; code licensed under GNU General Public License (GPL) 2.0 or later and other open source licenses. By using this site, you agree to the Terms of Use, Privacy Policy, and Code of Conduct. · Wikimedia Foundation · Privacy Policy · Code of Conduct · Terms of Use · Disclaimer · CC-BY-SA · GPL · Credits