mongodb data_error ai_generated partial

MongoServerError: OplogTruncationFailed: oplog entry truncated during recovery for namespace local.oplog.rs

ID: mongodb/oplog-truncation-after-point-in-time-recovery

Also available as: JSON · Markdown · 中文

70%Fix Rate

80%Confidence

1Evidence

2024-03-22First Seen

Version Compatibility

Version	Status	Introduced	Deprecated	Notes
MongoDB 6.0	active	—	—	—
MongoDB 7.0	active	—	—	—
MongoDB 8.0	active	—	—	—

Root Cause

During point-in-time recovery from a backup, the oplog was truncated because the recovery timestamp exceeded the oplog window or the oplog was corrupted.

generic

中文

从备份进行时间点恢复期间，由于恢复时间戳超出 oplog 窗口或 oplog 损坏，oplog 被截断。

Workarounds

80% success Perform a full resync of the affected secondary from a healthy primary using rs.reconfig() or initial sync.
```
Perform a full resync of the affected secondary from a healthy primary using rs.reconfig() or initial sync.
```
75% success Use mongodump/mongorestore with --oplogReplay to restore from a backup that includes a consistent oplog window.
```
Use mongodump/mongorestore with --oplogReplay to restore from a backup that includes a consistent oplog window.
```
70% success If the primary is affected, promote a secondary with a valid oplog using rs.stepDown() and rs.reconfig().
```
If the primary is affected, promote a secondary with a valid oplog using rs.stepDown() and rs.reconfig().
```

中文步骤

Perform a full resync of the affected secondary from a healthy primary using rs.reconfig() or initial sync.

Use mongodump/mongorestore with --oplogReplay to restore from a backup that includes a consistent oplog window.

If the primary is affected, promote a secondary with a valid oplog using rs.stepDown() and rs.reconfig().

Dead Ends

Common approaches that don't work:

90% fail
Oplog size change affects future operations, not past truncation.
70% fail
Incompatible backup may have different oplog range, causing further errors.
100% fail
Direct modification can corrupt the replica set and cause data loss.