tidb oom during adding index after injection ddl owner network partition

[Lily2025]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

1、enable tidb_enable_dist_task and global sort 2、run sysbench 3、add index for two tables 4、injection ddl owner network partition

2. What did you expect to see? (Required)

no oom

3. What did you see instead (Required)

one tidb oom

4. What is your TiDB version? (Required)

./tidb-server -V Release Version: v8.4.0 Edition: Community Git Commit Hash: 8516d55cfd97d42b53b86851e7c5c9793cdeabaf Git Branch: HEAD UTC Build Time: 2024-10-11 06:12:35 GoVersion: go1.23.2 Race Enabled: false Check Table Before Drop: false Store: unistore