Multiple EBS snapshots for a volume are stuck at less than or equal to 100% progress in pending state and when I try to launch a new one I receive the following error: ConcurrentSnapshotLimitExceeded. How can I resolve this issue?

Amazon EBS allows up to 5 snapshots per volume to be in progress concurrently. When multiple snapshots are running concurrently, newer snapshots remain in the pending state until pending snapshot with oldest "Started" time moves to the completed state.

EBS snapshots can be deleted while they are in progress, and if you initiate a new snapshot, the displayed progress percentage might be stuck for an extended period of time. The deleted snapshot progress will continue until 100% completion, and if you try to initiate more than 5 snapshots (including any that may have been deleted while they were in progress) you will receive the error message ConcurrentSnapshotLimitExceeded.

This can be caused by:

  • Multiple snapshots running concurrently
  • Deletion of a snapshot while it is in progress

You've reached the limit on the number of concurrent snapshots you can create on the specified volume. Wait until the 'pending' requests have completed, and check that you do not have snapshots that are in an incomplete state, such as 'error', which count against your concurrent snapshot limit.

Note: As a best practice, allow sufficient time for the previous snapshot to be completed. AWS recommends waiting 15 seconds between create-snapshot API requests for the same volume. For additional information, see Amazon EBS FAQs.

Elastic Block Store, EBS, snapshot, ConcurrentSnapshotLimitExceeded

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Published: 2017-01-06