Add before you push to the queue to prevent race condition on size #2044
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Signed-off-by: Joe Elliott <number101010@gmail.com>
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Codecov Report
@@ Coverage Diff @@
## master #2044 +/- ##
==========================================
- Coverage 97.4% 97.39% -0.01%
==========================================
Files 207 207
Lines 10315 10286 -29
==========================================
- Hits 10047 10018 -29
Misses 224 224
Partials 44 44
Continue to review full report at Codecov.
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joe-elliott
changed the title
jpkrohling
approved these changes
Jan 28, 2020
| @@ -105,12 +105,13 @@ func (q *BoundedQueue) Produce(item interface{}) bool { | |||
| return false | |||
| } | |||
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| q.size.Add(1) | |||
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This actually looks like a real bug, we are subtracting in both code branches, but adding in only one. Good catch!
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Thanks for the PR! |
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Which problem is this PR solving?
Fixes #2042
Short description of the changes
Adding to size before we put an item in the channel prevents
q.size.Sub(1)hitting before the addition. This prevents the uint from underflowing to max value.This change fixed the issue described in #2042 in our environment.
cc @gouthamve