Fivetran: Multiple database connector syncs are failing due to a decryption error.: "java.io.IOException: javax.crypto.IllegalBlockSizeException: Input length must be multiple of 16 when decrypting with padded cipher"

Incident Report for Fivetran

Resolved

Description:
Multiple database connector syncs are failing due to a decryption error: "java.io.IOException: javax.crypto.IllegalBlockSizeException: Input length must be multiple of 16 when decrypting with padded cipher"

Timeline:
This issue began on Sep 17, 2025 at 5:21AM UTC and was resolved on Sep 17, 2025 at 7:30AM UTC.

Cause:
The issue was caused by a bug introduced in a recent code change.

Resolution:
We resolved the issue by rolling back the change, which restored normal functionality.
Posted Sep 17, 2025 - 09:18 UTC