[v14] Reuse tunnel resolvers instead of creating one per connection attempt#37719
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rosstimothy merged 1 commit intobranch/v14from Feb 5, 2024
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[v14] Reuse tunnel resolvers instead of creating one per connection attempt#37719rosstimothy merged 1 commit intobranch/v14from
rosstimothy merged 1 commit intobranch/v14from
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rosstimothy
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…#37566) The `CachingResolver` is backed by a `FnCache` but does not expose a way to close the underlying cache. This leads to memory leaks as captured in #37025. Instead of modifying the resolver to allow explicit cleanup to occur, the resolvers were refactored to be created once per process instead of per connenction attempt to the cluster. Since the cluster address is read from the config file, it won't be changed for the duration of the process which allows us to safely use a single resolver. The one potential downside to this approach is the cache may return possibly stale errors during an outage until the entry is TTLed. Fixes #37025
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strideynet
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zmb3
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Backport #37566 to branch/v14
changelog: Fix memory leak in tbot caused by never closing reverse tunnel address resolvers