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hotfix(exporter): fix data race #1883
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olegshmuelov
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isn't
ttlcache
already thread safe? why we need the mutex here then?There was a problem hiding this comment.
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Without the mutex, there’s a risk of race conditions where multiple goroutines might attempt to create and set the same observer simultaneously.
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this can be also solved by the cache's
GetOrSet
func, but involves creating the observer each time and sometimes for nothing. though it will be GC'd quickly if not used, there is no goroutine in the creation.