# org.apache.kafka.common.errors.ReassignmentInProgressException：分区my_topic-0没有进行中的重新分配

- **ID:** `kafka/no-reassignment-in-progress`
- **领域:** kafka
- **类别:** runtime_error
- **验证级别:** ai_generated
- **修复率:** 88%

## 根因

管理客户端尝试取消或修改一个不存在或已完成的重新分配，原因是元数据过期或分区标识符错误。

## 解决方案

1. ```
   First, verify the current reassignment status using `kafka-reassign-partitions.sh --bootstrap-server localhost:9092 --verify --reassignment-json-file reassign.json`. If completed, no further action needed.
   ```
2. ```
   If the reassignment never started due to a previous error, re-submit the reassignment JSON using `kafka-reassign-partitions.sh --execute` with the correct partition list.
   ```
3. ```
   Use the AdminClient API: `adminClient.listPartitionReassignments().all().get()` to check active reassignments before attempting cancel. Example Java code: `ListPartitionReassignmentsResult result = adminClient.listPartitionReassignments();`
   ```

## 无效尝试

- **** — If the reassignment is already complete, retrying the same cancel will always fail because there is no in-progress reassignment. (90% 失败率)
- **** — In modern Kafka (2.6+), reassignments are tracked via the 'reassign_partitions' topic; deleting ZK nodes is ineffective and may cause corruption. (70% 失败率)
- **** — Restarting a broker does not affect the reassignment state; the admin client will still see no in-progress reassignment. (80% 失败率)