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Semaphore find_instance blocks for up to 2 min #323

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icristescu opened this issue May 5, 2021 · 1 comment
Open

Semaphore find_instance blocks for up to 2 min #323

icristescu opened this issue May 5, 2021 · 1 comment

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@icristescu
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Running a bootstrapped tezos node (1 block per minute) sometimes emits warnings

+306527809120us index_unix [WARNING] Semaphore find_instance was blocked for 47.988s
...
+211841313500us index_unix [WARNING] Semaphore find_instance was blocked for 2min33s

We should investigate - for instance we can report in the merge logs the time the t.rename_lock was taken.
@craigfe
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craigfe commented Jun 16, 2021

My WIP catapult tracing that was able to show this problem in combination with the bootstrap trace: https://github.com/CraigFe/index/tree/tracing. CC: @Ngoguey42.

@tomjridge tomjridge mentioned this issue Nov 5, 2021
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@icristescu @craigfe