MongoError
data
resource_error
ai_generated
true
MongoError：连接池耗尽
MongoError: connection pool exhausted
ID: data/mongodb-connection-pool-exhausted
80%修复率
85%置信度
1证据数
2023-03-15首次发现
版本兼容性
| 版本 | 状态 | 引入 | 弃用 | 备注 |
|---|---|---|---|---|
| MongoDB 5.0 | active | — | — | — |
| MongoDB 6.0 | active | — | — | — |
| MongoDB 7.0 | active | — | — | — |
| Node.js driver 4.0+ | active | — | — | — |
根因分析
MongoDB 驱动程序的连接池中的所有连接都已被占用，无法创建新连接，通常是由于查询缓慢或池大小不足导致。
English
All connections in the MongoDB driver's connection pool are in use and no new connections can be created, typically due to slow queries or insufficient pool size.
官方文档
https://www.mongodb.com/docs/drivers/node/current/connection-pool-monitoring/解决方案
-
Increase maxPoolSize and add connection pooling monitoring to detect slow operations. In Node.js: `const client = new MongoClient(uri, { maxPoolSize: 100 });` -
Optimize slow queries by adding indexes and using explain() to identify full collection scans. Example: `db.collection.createIndex({ field: 1 });` -
Implement connection pool draining and retry logic in application code to gracefully handle transient exhaustion.
无效尝试
常见但无效的做法:
-
65% 失败
More connections increase contention and memory usage on the server, causing slower queries and more timeouts.
-
40% 失败
The root cause (slow queries or insufficient indexing) remains unaddressed.
-
55% 失败
Timeouts may kill slow queries but don't fix the underlying performance issue, leading to data inconsistency.