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Fix #512 

Signed-off-by: beorn7 <beorn@soundcloud.com>
This commit is contained in:
beorn7 2018-12-06 11:35:30 +01:00
parent 9542e4005c
commit fae889635c
1 changed files with 7 additions and 1 deletions
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8
prometheus/registry.go
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@ -872,7 +872,13 @@ func checkMetricConsistency(
h = hashAddByte(h, separatorByte)
// Make sure label pairs are sorted. We depend on it for the consistency
// check.
sort.Sort(labelPairSorter(dtoMetric.Label))
if !sort.IsSorted(labelPairSorter(dtoMetric.Label)) {
// We cannot sort dtoMetric.Label in place as it is immutable by contract.
copiedLabels := make([]*dto.LabelPair, len(dtoMetric.Label))
copy(copiedLabels, dtoMetric.Label)
sort.Sort(labelPairSorter(copiedLabels))
dtoMetric.Label = copiedLabels
}
for _, lp := range dtoMetric.Label {
h = hashAdd(h, lp.GetName())
h = hashAddByte(h, separatorByte)