Table resolvedTs is missing after truncate table DDL.

[asddongmen]

What I did?

The integration test case multi_source is unstable, and I cannot determine the cause based on the current logs.

So I added a debug log in the eventStore to print the received resolvedTs and retested.

In the retest logs, I found that this dispatcher was not reset after registration.

[2025/01/16 02:44:50.689 +00:00] [INFO] [event_broker.go:293] ["dispatcher not reset"] [dispatcher=73875005148128948212000780908188640696]
[2025/01/16 02:45:50.689 +00:00] [INFO] [event_broker.go:293] ["dispatcher not reset"] [dispatcher=73875005148128948212000780908188640696]
[2025/01/16 02:46:50.689 +00:00] [INFO] [event_broker.go:293] ["dispatcher not reset"] [dispatcher=73875005148128948212000780908188640696]
[2025/01/16 02:47:50.689 +00:00] [INFO] [event_broker.go:293] ["dispatcher not reset"] [dispatcher=73875005148128948212000780908188640696]

I identified its tableID as 210.

[2025/01/16 02:43:57.523 +00:00] [INFO] [event_dispatcher_manager.go:434] ["new dispatcher created"] [ID=73875005148128948212000780908188640696] [changefeedID=5137061994273448495694501480027201430] [namespace=default] **[tableSpan="TableID:210** StartKey:\"t\\200\\000\\000\\000\\000\\000\\000\\377\\322_r\\000\\000\\000\\000\\000\\372\" EndKey:\"t\\200\\000\\000\\000\\000\\000\\000\\377\\322_s\\000\\000\\000\\000\\000\\372\" "] [startTs=455342903358128172]

I then searched for its resolvedTs log but found no results.

> cat cdc.log | grep "hyy advance resolved ts" | grep "tableID=210" | wc -l
0

However, I was able to find resolvedTs logs for other tables.

 cat cdc.log | grep "hyy advance resolved ts"  | wc -l
 757
 
 > cat cdc.log | grep "hyy advance resolved ts"  | tail
[2025/01/16 02:52:54.494 +00:00] [DEBUG] [event_store.go:521] ["hyy advance resolved ts"] [tableID=182] [dispatcherID=4509240733371491341320306463344308135] [resolvedTs=455343072729628675] [maxEventCommitTs=455342902611017742]
[2025/01/16 02:52:55.495 +00:00] [DEBUG] [event_store.go:521] ["hyy advance resolved ts"] [tableID=182] [dispatcherID=4509240733371491341320306463344308135] [resolvedTs=455343072991510531] [maxEventCommitTs=455342902611017742]
[2025/01/16 02:52:56.496 +00:00] [DEBUG] [event_store.go:521] ["hyy advance resolved ts"] [tableID=182] [dispatcherID=4509240733371491341320306463344308135] [resolvedTs=455343073253916676] [maxEventCommitTs=455342902611017742]

From this, I concluded that the resolvedTs for tableID=210 is missing.

Failed Test Link: https://github.com/pingcap/ticdc/actions/runs/12800697540/job/35688920752?pr=882
Log Link: https://github.com/pingcap/ticdc/actions/runs/12800697540/artifacts/2438463597

[asddongmen]

I ran test based on #882 .