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STC failure occurred mid transfer. stcx.SnapshotError: HSR Commit failed after 3 attempts

Emily Glass

Last Updated: April 06, 2018 15:18

1. Scope

This article describes the cause and possible solution for the error STC failure occurred mid transfer. stcx.SnapshotError: HSR Commit failed after 3 attempts.

2. Cause

While running a backup, the agent was unable to commit the finalization data for the volume. The ShadowSnap agent could not query the incremental tracking state on the volume.
The ShadowSnap agent could not read the volume's disk headers.

2. Solution

Starting with Version 3.2.0 of ShadowSnap, this error may appear. The backup state was determined to be a failed backup requiring a differential merge to be executed in order to correct the incremental tracking state and repair the image headers.
The next backup after that error appears will be a differential merge.
This should be automatically executed by the agent. If not, we can force a differential merge.

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