When an index is being rebuilt on a table, what is the STATE of the tablespace it resides in?
getting a deadlock when a scheduled backup is being run.
SQL0911N The current transaction has been rolled back because of a deadlock
or timeout. Reason code "68". SQLSTATE=40001
The one prominent thing seen in the db2diag.log is the rebuilding of indexes at the same time.

Thank you,
Poorvi

RC=68 is a lock timeout. Capture lock and application info (example: db2pd, snapshots, db2_capture_locktimeout...) to understand what's happening.

Some info about what's (in)compatible with online backup:
https://www-304.ibm.com/support/docv...id=swg21214717