Hi All !!
Hope somebody can give me a clue about the better way to solve a problem.
CentOS 7, standalone mongoDB server, initially 3.6.1.
I’m trying to migrate that into the latest and the procedure suggest to proceed gradually.
I did update without problems from 3.6.1 to 3.6.20 and now I’m trying to migrate from 3.6.20 to 4.0.20.
I did install the 4.0.20 binaries and pointed it to the same area where the data were stored.
When I try to start it I end up with :
ERROR: child process failed, exited with “error number 62”
Looking here (https://docs.mongodb.com/manual/reference/exit-codes/) says :
62 Returned by mongod if the datafiles in --dbpath are incompatible with the version of mongod currently running.
There are some procedure to follow to fix the problem ?
I’m searching but so far I didn’t find a clear answer or a procedure I can follow to fix this problem or also how to have more details about the nature of the incompatibility.
Thanks for any help !