# org.apache.kafka.common.errors.InvalidCommitOffsetSyncException：由于与组协调器的同步冲突，偏移提交失败

- **ID:** `kafka/invalid-commit-offset-sync`
- **领域:** kafka
- **类别:** runtime_error
- **验证级别:** ai_generated
- **修复率:** 80%

## 根因

消费者在组协调器正在进行再平衡或纪元变更时尝试提交偏移量，导致同步不匹配。

## 版本兼容性

| 版本 | 状态 | 引入 | 弃用 |
|------|------|------|------|
| kafka 3.4.0 | active | — | — |
| kafka 3.5.0 | active | — | — |
| kafka 3.6.0 | active | — | — |

## 解决方案

1. ```
   Set 'enable.auto.commit=false' and manually commit offsets only after ensuring the consumer is in a stable state (e.g., after a successful poll that does not trigger rebalance). Add a retry loop with exponential backoff for commit calls.
   ```
2. ```
   Upgrade the Kafka client library to version 3.7.0 or later, which includes a fix for coordinator epoch synchronization in offset commits.
   ```

## 无效尝试

- **** — A restart triggers another rebalance, which may re-introduce the synchronization conflict, especially if the coordinator state is stale. (65% 失败率)
- **** — This does not prevent the epoch change that causes the conflict; it only delays rebalance detection, possibly masking the underlying issue. (50% 失败率)