Given the following scenario:

snapshot.mode=never and a blocking snapshot triggered. If it will not finish and the connector is restarted, since the snapshot.mode does not permit the snapshot it will then throw an error. This is just because the snapshot context for the blocking snapshot is the same for the initial snapshot and a not completed snapshot will be detected.

We want to enhance this behavior adding a specific flag for marking the blocking snapshot and skip the check (validation of snapshot mode) in case there is a blocking snapshot in progress.