KazooClient thread-safety and instance reuse

[bossie]

I couldn't immediately find an answer in the docs re: thread-safety and reuse of KazooClient.

I would like to know if an instance of KazooClient is supposed to be short-lived and limited to a single thread or if a shared instance can be used from multiple threads.

In particular, is there any problem with:

1. instantiate + start() a single instance of KazooClient at the startup of a web application and reusing it everywhere;
2. stop() and close() said instance at shutdown?

Thanks!

[ceache]

Hi, It can safely be used across multiple threads, but do *not* use it across processes (forks). Cheers,

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On Wed, Sep 6, 2023, 10:37 Jan Van den bosch ***@***.***> wrote: I couldn't immediately find an answer in the docs re: thread-safety and reuse of KazooClient. I would like to know if an instance of KazooClient is supposed to be short-lived and limited to a single thread or if a shared instance can be used from multiple threads. In particular, is there any problem with: 1. instantiate + start() a single instance of KazooClient at the startup of a web application and reusing it everywhere; 2. stop() and close() said instance at shutdown? Thanks! — Reply to this email directly, view it on GitHub <#728>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAIFTHW7WQJGDOH3IXGPXV3XZCDEFANCNFSM6AAAAAA4NOM42E> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[bossie]

Thanks. So would you recommend using a single KazooClient instance across the entire application? Are there any drawbacks, considerations?

[ceache]

None, we have been doing single kazoo client shared by multiple threads for years now. Only advice is make sure you run a little code on the watchers' thread as possible (there is only one per KazooClient) since it will be shared. Create a worker thread and pass it all the events for processing using a queue.Queue. Cheers,

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On Wed, Sep 6, 2023, 11:19 Jan Van den bosch ***@***.***> wrote: Thanks. So would you recommend using a single KazooClient instance across the entire application? Are there any drawbacks, considerations? — Reply to this email directly, view it on GitHub <#728 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAIFTHS4WPODHYISAQJYRE3XZCIBNANCNFSM6AAAAAA4NOM42E> . You are receiving this because you commented.Message ID: ***@***.***>

[bossie]

That's clear, thanks.