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Status Not under consideration
Workspace Informix
Components Informix Server
Created by Guest
Created on Oct 20, 2014

Allow DBA to re-initialize OS process cache created by the resolver routines

This is a follow up of RFE 33797.
The original RFE was closed as "Delivered", but I think the analysis was incorrect.

The complain is that whenever a OS process calls gethostbyaddr() or equivalent, the OS itself will cache some information about the current resolver configuration, like the /etc/nssitch.conf and /etc/resolv.conf setup.

The answer to my previous RFE stated that by resetting the NS_CACHE entry this would be solved, but that's not the case.
Setting the cache times to 0 will clear the information kept by the engine, but will not reset the internal OS cache of the OS.
In practical terms this means that if a customer changes their DNS settings they'll have to restart the Informix system in order to be able to use the new configuration.
That's clearly inconvenient. What we need is a way to force ALL MSC VPs to run the res_init() OS function.

For further details, I suggest the following post that shows a workaround:

I'd appreciate a careful investigation in order to understand the technical details.
After that, the option to fix it or not is beyond me.