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retrieval: fix memory leak in scrape cache

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This commit is contained in:
Fabian Reinartz 2017-06-26 00:24:54 +02:00
parent ca2b68889b
commit 2368d2c45b
1 changed files with 5 additions and 0 deletions
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5
retrieval/scrape.go
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@ -508,6 +508,11 @@ func (c *scrapeCache) getRef(met string) (string, bool) {
}
func (c *scrapeCache) addRef(met, ref string, lset labels.Labels) {
// Clean up the label set cache before overwriting the ref for a previously seen
// metric representation. It won't be caught by the cleanup in iterDone otherwise.
if e, ok := c.refs[met]; ok {
delete(c.lsets, e.ref)
}
c.refs[met] = &refEntry{ref: ref, lastIter: c.iter}
// met is the raw string the metric was ingested as. The label set is not ordered
// and thus it's not suitable to uniquely identify cache entries.