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docs(grouping): Note that fingerprint values are concatenated before hashing - #20236
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…hashing Co-Authored-By: Matt Duncan <matt.duncan@sentry.io>
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Co-Authored-By: Matt Duncan <matt.duncan@sentry.io>
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Sentry joins custom fingerprint values with no separator before hashing (
hash_from_valuesinsrc/sentry/grouping/utils.py), so different arrays can collide, e.g.["sync", "7", "42"]and["sync", "74", "2"]. This adds a short note to the event grouping page with a workaround: label each value.Addresses getsentry/sentry#128520. A code fix would re-hash existing custom-fingerprint groups, so this documents the current behavior instead.
via matt.duncan.
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