Hints not being sent from 3.0 to 4.0?

Hi, We are currently in the process of upgrading our environment from 3.0.27 to 4.0.4. However I see some issues with hints not being sent from v3 nodes to v4 nodes. We have a test environment with 2DCs, we are currently writing to DC1 and DC2 have been upgraded from version 3.0.27 -> 4.0.4 Afte

Re: Hints not being sent from 3.0 to 4.0?

Is it over max hint window ? if over, better to do a full repair. check table system.hints, do you see rows ? As I remember, during upgrade, transactions will store in hints until other cluster have done upgrade, so for safety, change default 3 hours hint window to long time just before starting