For appeals, questions and feedback about Oracle Forums, please email oracle-forums-moderators_us@oracle.com. Technical questions should be asked in the appropriate category. Thank you!
The agent check fail and timedout and DB instnace crash happening due to nofiles(descriptors) 4096 set to low value.
According to Oracle Documentation the Open file descriptors should be set to atleast 65536 for root, grid, and oracle user.