We have had PropertyFileSnitch for a long time even though 
GossipingPropertyFileSnitch is effectively a superset of what it offers and is 
much less error prone.  There are some unexpected behaviors when things aren’t 
configured correctly with PFS.  For example, if you replace nodes in one DC and 
add those nodes to that DCs property files and not the other DCs property files 
- the resulting problems aren’t very straightforward to troubleshoot.

We could try to improve the resilience and fail fast error checking and error 
reporting of PFS, but honestly, why wouldn’t we deprecate and remove 
PropertyFileSnitch?  Are there reasons why GPFS wouldn’t be sufficient to 
replace it?
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