When taking backup on a busy node Backup fails if not able to get Log information

When a node is busy, not at saturation point but ... busy, in case of PXC we also have FC happening. 
The last step of the process in PXB is to take a snapshot of the log information with

Unfortunately this operation may go in timeout:

Causing the process to be aborted at the end. 

The line where this happens:
https://github.com/percona/percona-xtrabackup/blob/05b32eab68e301ab71a980ec186ff88bc12a4349/storage/innobase/xtrabackup/src/backup_mysql.cc#L1689

After a brief discussion with we noticed that it could be beneficial to increase the Lock wait timeout to allow the operation to be completed, or also include a retry step. 
In any case at the moment the use of the performance_schema.log_status table is not deprive of locking with all the correlate issues.