Fixes #1272: fix map concurrent writes when rendering html templates in ui #1280
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lx223
changed the title
lx223
changed the title
povilasv
approved these changes
Jun 27, 2019
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This makes sense, we were writing to map concurrently. Thanks for fixing this! |
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That was quick @lx223 ! (: |
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Since we probably copied this part from Prometheus I would check Prometheus codebase as well if they have same bug 🤔 |
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Also we are missing CHANGELOG entry (: But it will be part of release shephard items to do. |
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Ah, sorry. Should have added the entry in CHANGELOG. I'll put up another PR. |
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Changes
template.Funcsto overwrite prefix rendering function to avoid concurrent map writesVerification
Run
go run github.com/improbable-eng/thanos/cmd/thanos queryAnd then concurrently HTTP GET "http://0.0.0.0:10902/graph" 1000 times
Before change:
It panics with concurrent map writes.
After change:
No longer panics.