5.1.1 Hotfix TPCH-100 Q9 failed with protobuf exception
Open
Nobody has claimed this yet.
- Dominant language
- C++
- Stars
- 1k
- Forks
- 423
- Avg merge
- 1d 15h
- Merged PRs (30d)
- 24
Description
set @@session.tidb_enforce_mpp=1;
mysql --host 172.16.6.60 --port 4000 -Dtpch_100 < 9.sql
ERROR 1105 (HY000) at line 4: other error for mpp stream: DB::Exception: Exchange receiver meet error : DB::Exception: Exchange receiver meet error : DB::Exception: Exchange receiver meet error : DB::Exception: Exchange receiver meet error : DB::Exception: Fail to serialize response, response size: 2205825623
So the serialization limit is exceeded.
Contributor guide
No contributing guide indexed for this repository
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by running TPCH-100 Q9 from 9.sql with @@session.tidb_enforce_mpp=1 against the reported TiFlash setup, and confirm the MPP exchange receiver serialization error and response size. Trace the exchange response serialization path to determine how the limit is reached. Done means Q9 completes without the protobuf or serialization exception.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp
- Domain
- distributed-systems
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100