mongodb resource_error ai_generated partial

MongoServerError: OplogSlotNotAvailable: 由于复制延迟无法分配oplog条目

MongoServerError: OplogSlotNotAvailable: Cannot allocate oplog entry due to replication lag

ID: mongodb/oplog-slot-not-available

其他格式: JSON · Markdown 中文 · English
80%修复率
85%置信度
1证据数
2024-03-15首次发现

版本兼容性

版本状态引入弃用备注
MongoDB 6.0.5 active — — —
MongoDB 7.0.1 active — — —

根因分析

从节点复制延迟导致主节点oplog槽位耗尽，无法处理新写入请求。

English

Secondary replication lag caused the primary to exhaust oplog slots, preventing new writes.

generic

官方文档

https://www.mongodb.com/docs/manual/reference/errors/

解决方案

  1. Temporarily reduce write load by throttling application writes or pausing batch jobs. Use db.setProfilingLevel(0) to disable profiling if enabled.
  2. Increase secondary's priority or add more secondaries to distribute replication load. Use rs.add('host:port') to add a new secondary.

无效尝试

常见但无效的做法:

  1. 60% 失败

    Increasing oplog size doesn't fix the underlying replication delay; it only delays exhaustion.

  2. 80% 失败

    Restarting the primary resets the oplog but doesn't resolve secondary lag; issue recurs quickly.