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num_clients about mcrouter HOT 4 CLOSED

facebook avatar facebook commented on May 3, 2024
num_clients

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Comments (4)

alikhtarov avatar alikhtarov commented on May 3, 2024

Looks like there's a bug in how we increment/decrement num_clients_stats in server.cpp. It's an unsigned int, so if we decrement more than we increment we end up with an underflow and a large number that you observe.

Can you add some logging to server.cpp near stat_incr and stat_decr to investigate (i.e. LOG(ERROR) << "incremented";) and see if you can catch the mismatched incr/decrs? We're also debugging internally.

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samek avatar samek commented on May 3, 2024

As you know I could't build the latest version I've used Docker which was 6 months old. After changing to another version (more recent) this never appeared again.
I'll now try with the Latest build which I've just made.

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alikhtarov avatar alikhtarov commented on May 3, 2024

@samek Any luck reproducing this bug? We didn't see it on our side either.

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samek avatar samek commented on May 3, 2024

Not anymore.

I've been running the latest version ever since.

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