SyntaxError: Unexpected token < in JSON at position 0 (in ext.growthExperiments.DataStore)
Closed, ResolvedPublicPRODUCTION ERROR
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Assigned To

Authored By

	• mewoph
	May 26 2022, 10:15 PM

Description

Error

mwversion: undefined
reqId: undefined
Find reqId in Logstash

normalized_message

SyntaxError: Unexpected token < in JSON at position 0

exception.trace

at GrowthTasksApi.handleError  https://en.wikipedia.org/w/load.php?lang=en&modules=ext.growthExperiments.DataStore%2CHelp%2CHomepage%7Cext.growthExperiments.Homepage.Mentorship%2CSuggestedEdits%7Cext.guidedTour.tour.homepage_welcome%7Cjquery%2Coojs-ui-core%2Coojs-ui-widgets%7Coojs-ui.styles.icons-content%2Cicons-editing-advanced%2Cicons-editing-citation&skin=vector&version=3lzkr:21:230
at mightThrow  https://en.wikipedia.org/w/load.php?lang=en&modules=ext.growthExperiments.DataStore%2CHelp%2CHomepage%7Cext.growthExperiments.Homepage.Mentorship%2CSuggestedEdits%7Cext.guidedTour.tour.homepage_welcome%7Cjquery%2Coojs-ui-core%2Coojs-ui-widgets%7Coojs-ui.styles.icons-content%2Cicons-editing-advanced%2Cicons-editing-citation&skin=vector&version=3lzkr:295:881
at process  https://en.wikipedia.org/w/load.php?lang=en&modules=ext.growthExperiments.DataStore%2CHelp%2CHomepage%7Cext.growthExperiments.Homepage.Mentorship%2CSuggestedEdits%7Cext.guidedTour.tour.homepage_welcome%7Cjquery%2Coojs-ui-core%2Coojs-ui-widgets%7Coojs-ui.styles.icons-content%2Cicons-editing-advanced%2Cicons-editing-citation&skin=vector&version=3lzkr:296:544

Impact

Notes

https://logstash.wikimedia.org/app/discover#/doc/logstash-*/logstash-2022.05.26?id=k4PO_YABQPMIvrie60VY

Event Timeline

• mewoph created this task.May 26 2022, 10:15 PM

Restricted Application added a subscriber: Aklapper. · View Herald TranscriptMay 26 2022, 10:15 PM

Daimona subscribed.May 27 2022, 10:06 AM

Something in our client-side code using GrowthTasksApi attempted to parse a non JSON string, which was probably an uncaught error returned from the server. I guess we could rework GrowthTasksApi to log some snippet of the error message in this case?

Krinkle renamed this task from SyntaxError: Unexpected token < in JSON at position 0 to SyntaxError: Unexpected token < in JSON at position 0 (in ext.growthExperiments.DataStore).May 30 2022, 8:31 PM

Krinkle moved this task from Untriaged to May 2022 on the Wikimedia-production-error board.

Sgs subscribed.May 31 2022, 8:31 AM

MShilova_WMF edited projects, added Growth-Team; removed Growth-Team (Sprint 0 (Growth Team)).Jun 27 2022, 6:45 PM

MShilova_WMF moved this task from Inbox to Up next Sprint on the Growth-Team board.

Not seen since July 12–and even then, just a single instance. Closing this.

SyntaxError: Unexpected token < in JSON at position 0 (in ext.growthExperiments.DataStore)Closed, ResolvedPublicPRODUCTION ERRORActions