Fix goroutine leak on config reload #551
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Promxy is leaking goroutines on config reloads leading to OOM kills in the long run. two issues : - oldState ServerGroups are not cancelled if appenders didn't change - Prometheus discovery target managers never close SyncCh blocking the ServerGroup Sync() goroutine forever
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Promxy is leaking goroutines on config reloads leading to OOM kills in the long run.
two issues :
This is a rebase of #508