ticdc mysql sink memory quota is always zero after inject pd leader networkpartition which will trigger pd leader change

[Lily2025]

What did you do?

1、br restore 20000 warehouse to upstream and tidb downstream
2、create cdc changefeed with config
"replica_config": {
"ignore_ineligible_table": true,
"memory_quota": 2147483648
}
3、run tpcc with 32 threads
4、checkpoint lag got bigger and bigger
5、run ha-pdleader-to-all-network-partition-last-for-10m（pd change leader）
the time of pd leader changed : 2023-02-17 13:06
and this time ticdc0 restart abnormally（issue：https://github.com/pingcap/tiflow/issues/8170）

What did you expect to see?

ticdc mysql sink memory quota is normal as before

What did you see instead?

ticdc mysql sink memory quota is always zero after inject pd leader networkpartition which will trigger pd leader change

Versions of the cluster

sh-5.1# ./cdc version
Release Version: v6.6.0
Git Commit Hash: feae75e
Git Branch: heads/refs/tags/v6.6.0
UTC Build Time: 2023-02-15 15:38:00
Go Version: go version go1.19.5 linux/amd64
Failpoint Build: false

current status of DM cluster (execute query-status <task-name> in dmctl)

No response

[Lily2025]

/type bug
/severity major
/assign hicqu

[nongfushanquan]

/close

[ti-chi-bot]

@nongfushanquan: Closing this issue.

In response to this:

/close

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[asddongmen]

same as #8808

[nongfushanquan]

/remove-label affects-7.1