Detect pid reuse

Aaron Seigo aseigo@REDACTED
Thu Jul 9 09:26:43 CEST 2020

On 2020-07-06 14:09, Dinislam Salikhov wrote:
> If I want to send a command to the database, I search for the pid of
> the corresponding connection (in supervisor's children list). And

Perhaps register the processes with a name so that instead of searching 
for a literal pid, which may indeed change and requires more bookkeeping 
in your application code, you lookup the relevant connect by a name in a 
process registry. Should the old connection go away, the new one takes 
over the same name.

If you have multiple connections to any given db (a pool of pools, if 
you will), using a process group module like pg makes this easy.

Even then, you'll obviously need to handle the failure case of the 
process exiting between the message being sent and the response being 
received, but at least the lookup will be consistent.

Aaron Seigo

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