Thanks for answering Tatsuo,
The test I did was:
1) for loop inserting 50 values to a table.
2) stop one of the servers (in that moment the client in the loop gives the
error I commented)
3) The online backup starts and works perfectly.
4) I look for all the values in the table, and, in fact,
I'm confused. Even if pgpool-II sends sync message to one of the
backend servers, backend will not close the transaction if it's in an
explicit transaction. Thus the shared lock will remain, right? I think
just sending sync message to all backend servers does not solve the
whole problem. IMO what
