Snapshot exception

i am trying to take snapshot for every 5 min (ex: 5th min, 10th min, 15th min, 20th min ...), it works fine but some times it giving error

ConcurrentSnapshotExecutionException[[MyBackup:my_snapshot_2015-06-03-05-21] a snapshot is already running

i am using elasticsearch 1.2.2 . please help me what is the problem...?

The previous Snapshot operation is still running.
You should check it first or ignore this error.

thanks david. i stopped the previous snapshot

or you can check if there is any snapshot that is currently running