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dispatch queue back-pressure and deadlock #3035

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kostasrim opened this issue May 9, 2024 · 0 comments
Open

dispatch queue back-pressure and deadlock #3035

kostasrim opened this issue May 9, 2024 · 0 comments
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@kostasrim
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dispatch queue can deadlock:

  • if a pubsub connection both publishes and subscribes to the same channel and sends multiple messages that the queue is:
    Publish <----- Publish <----- Publish <----- ends up Publish <----- SendPubMessage <----- SendPubMessage <----- SendPubMessage and deadlocks because the top message Publish now will block on EnsureBelowLimit.

  • If intrusive messages populate the queue recursively nonstop then the rest of the queue will starve
@kostasrim kostasrim added the bug Something isn't working label May 9, 2024
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