[BUG] `GET /channels/{channelId}/statistics` intermittently returns 500 during undeploy of an unrelated channel
维护者通常 1 天内回复
还没有人认领这个 Issue。
评估
- 难度
- 4/5
- 预计耗时
- 3-5 天
- 新手友好度
- 38/100
调研方向
The GET /channels/{channelId}/statistics path (and the includeUndeployed variant) currently reads D_MS tables for every channel, so a concurrent undeploy of another channel can drop a table and raise DonkeyDaoException wrapping SQLSyntaxErrorException; serialising that exception then fails and the client only sees a generic 500. Start from the statistics handler and the Donkey DAO that enumerates those tables. Done when a request naming channel A only reads what it needs for A and the two-thread repro no longer 500s.
由索引模型根据 Issue 内容生成。
描述
Repro:
- In one thread, loop: deploy channel B, send a message through it, remove channel B.
- In another thread, loop:
GET /channels/{A}/statistics.GET /channels/statistics?channelId={A}&includeUndeployed=truefails the same way.
Expected:
- A request naming channel A reads only what it needs to answer about channel A.
Actual:
- Each request reads
D_MS<n>for every channel the server knows about, A or not. - Roughly one request in forty fails with HTTP 500 under the loop above.
- The server log shows
DonkeyDaoException: java.sql.SQLSyntaxErrorException: Table/View 'D_MS<n>' does not exist,
for the channel being removed, not for A. - The client sees only
{"message":"Request failed.","status":"500"}, because serialising the
SQLExceptioninto the error response throws as well.
- 主要语言
- Java
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- 3 天 6 小时
- 30 天内合并 PR
- 15
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