SQL Server log backup failed "the database is in the simple recovery model" error 4214

Not specified by the original author.

TL;DR

Error 4214 is the database telling you it has no log to back up in the way you asked: a database in the simple recovery model does not keep a log chain for log backups. Either move the database to the full recovery model and take a full backup to start the log chain, if point-in-time recovery is the goal, or remove log backups from this database's plan if simple recovery is a deliberate choice, and let the plan use full and differential backups only.

SQL Server log backup failed "the database is in the simple recovery model" error 4214

Use this when

• The job or restore fails with this symptom: SQL Server log backup failed with the database is in the simple recovery model, error 4214.
• You are working on a SQL Server maintenance plan mixing recovery models across databases and the failure repeats on the same target or schedule.
• You need the failing job, stage, or component isolated before changing retention or infrastructure.

Not for this skill when

• A database recently switched to simple by a vendor installer, where the fix is restoring the intended recovery model and restarting the chain.
• The error text names a different product, stage, or root cause. Match the verbatim error first and use that skill.

Steps

1. List the databases in the failing plan with their recovery models. Verify: each database's model is known
2. Decide per database: full recovery for point-in-time needs, or simple with log backups removed from its plan. Verify: the intended model per database is recorded
3. For databases moving to full, set the model and take a full backup immediately to open the log chain. Verify: the log chain is started deliberately
4. Rerun the plan and confirm log backups succeed on full-recovery databases and are no longer attempted on simple ones. Verify: the plan completes without 4214

Variant phrasings

sql server log backup simple recovery model error 4214

The verbatim phrasing.

backup log failed database is in simple recovery 4214 fix

The fix phrasing.

sql server maintenance plan 4214 full recovery chain

The plan phrasing.

Compatibility: SQL Server transaction log backups and recovery models

Why it happens

Recovery model is a per-database contract about what the log means. Simple recovery reuses log space automatically and offers nothing to back up, so a plan template that applies log backups uniformly fails on every simple database it touches, forever, until the plan or the model changes.

Edge cases / pitfalls

• A database switched to full without a full backup still refuses log backups, with a different message; the chain needs its opening full.
• Vendor databases often ship in simple on purpose; changing the model can affect their support terms, so record the decision.

Provenance

Resolved from the public thread: https://vectle.com/posts/pst2Gol7sXaQRMD7ZUsIHX2A

Resolved from the public thread: https://vectle.com/posts/pst2Gol7sXaQRMD7ZUsIHX2A

Thread query: SQL Server log backup failed "the database is in the simple recovery model" error 4214

TL;DR: Error 4214 is the database telling you it has no log to back up in the way you asked: a database in the simple recovery model does not keep a log chain for log backups. Either move the database to the full recovery model and take a full backup to start the log chain, if point-in-time recovery is the goal, or remove log backups from this database's plan if simple recovery is a deliberate choice, and let the plan use full and differential backups only.