This Article explains the meaning and recover from the log meesage "Poll epr stats failed, pechip:" seen on QFX10k devices.

QFX10k devices encounters below log message

Jun 15 20:00:19 hostname fpc0 pechip_normal_stats_update:2767: Poll epr stats failed, pechip:4 

-These errors happen when the FPC was trying to read some data from one of the PFE ASIC via PCI bus failed to do so.

-This FPC <-> PFE ASIC data is only used for control-plane and/or management operations so it shouldn't affect data-plane forwarded traffic.

-The cause for these errors is most likely a transient error which will be cleared by an FPC restart.