Panic in mysql dml writer

[hongyunyan]

What did you do?

Run the schrddl workload in serial mode

What did you expect to see?

No response

What did you see instead?

[2025/03/18 02:11:42.002 +00:00] [PANIC] [mysql_writer_dml.go:200] ["Here are two invalid rows, one is Delete A, the other is Update A to B"] [Events="[{\"version\":0,\"dispatcher_id\":{\"low\":11766953444167129355,\"high\":7287039303564457910},\"physical_table_id\":2767,\"start_ts\":456724027949187358,\"commit_ts\":456724027949187359,\"table_info_version\":456724026363215891,\"seq\":105,\"state\":0,\"length\":13,\"approximate_size\":1750,\"row_types\":\"AgICAgICAgICAgICAgICAgICAgICAgICAgI=\",\"rows\":{},\"raw_rows\":null,\"table_info\":{\"schema-id\":2767,\"table-name\":{\"Schema\":\"ddl\",\"Table\":\"ta960c56f\",\"TableID\":2767,\"IsPartition\":false}},\"replicating_ts\":456724026756956209},{\"version\":0,\"dispatcher_id\":{\"low\":11766953444167129355,\"high\":7287039303564457910},\"physical_table_id\":2767,\"start_ts\":456724027949187407,\"commit_ts\":456724027949187408,\"table_info_version\":456724026363215891,\"seq\":106,\"state\":0,\"length\":10,\"approximate_size\":1298,\"row_types\":\"AgICAgICAgICAgICAgICAgICAgI=\",\"rows\":{},\"raw_rows\":null,\"table_info\":{\"schema-id\":2767,\"table-name\":{\"Schema\":\"ddl\",\"Table\":\"ta960c56f\",\"TableID\":2767,\"IsPartition\":false}},\"replicating_ts\":456724026756956209},{\"version\":0,\"dispatcher_id\":{\"low\":11766953444167129355,\"high\":7287039303564457910},\"physical_table_id\":2767,\"start_ts\":456724027949187443,\"commit_ts\":456724027949187444,\"table_info_version\":456724026363215891,\"seq\":107,\"state\":0,\"length\":13,\"approximate_size\":1085,\"row_types\":\"AAAAAAAAAAAAAAAAAA==\",\"rows\":{},\"raw_rows\":null,\"table_info\":{\"schema-id\":2767,\"table-name\":{\"Schema\":\"ddl\",\"Table\":\"ta960c56f\",\"TableID\":2767,\"IsPartition\":false}},\"replicating_ts\":456724026756956209},{\"version\":0,\"dispatcher_id\":{\"low\":11766953444167129355,\"high\":7287039303564457910},\"physical_table_id\":2767,\"start_ts\":456724027949187577,\"commit_ts\":456724027949187578,\"table_info_version\":456724026363215891,\"seq\":109,\"state\":0,\"length\":1,\"approximate_size\":71,\"row_types\":\"AQ==\",\"rows\":{},\"raw_rows\":null,\"table_info\":{\"schema-id\":2767,\"table-name\":{\"Schema\":\"ddl\",\"Table\":\"ta960c56f\",\"TableID\":2767,\"IsPartition\":false}},\"replicating_ts\":456724026756956209},{\"version\":0,\"dispatcher_id\":{\"low\":11766953444167129355,\"high\":7287039303564457910},\"physical_table_id\":2767,\"start_ts\":456724027949187635,\"commit_ts\":456724027949187636,\"table_info_version\":456724026363215891,\"seq\":110,\"state\":0,\"length\":1,\"approximate_size\":71,\"row_types\":\"AQ==\",\"rows\":{},\"raw_rows\":null,\"table_info\":{\"schema-id\":2767,\"table-name\":{\"Schema\":\"ddl\",\"Table\":\"ta960c56f\",\"TableID\":2767,\"IsPartition\":false}},\"replicating_ts\":456724026756956209},{\"version\":0,\"dispatcher_id\":{\"low\":11766953444167129355,\"high\":7287039303564457910},\"physical_table_id\":2767,\"start_ts\":456724027962294290,\"commit_ts\":456724027962294291,\"table_info_version\":456724026363215891,\"seq\":111,\"state\":0,\"length\":2,\"approximate_size\":142,\"row_types\":\"AAA=\",\"rows\":{},\"raw_rows\":null,\"table_info\":{\"schema-id\":2767,\"table-name\":{\"Schema\":\"ddl\",\"Table\":\"ta960c56f\",\"TableID\":2767,\"IsPartition\":false}},\"replicating_ts\":456724026756956209},{\"version\":0,\"dispatcher_id\":{\"low\":11766953444167129355,\"high\":7287039303564457910},\"physical_table_id\":2767,\"start_ts\":456724027962294371,\"commit_ts\":456724027962294372,\"table_info_version\":456724026363215891,\"seq\":113,\"state\":0,\"length\":2,\"approximate_size\":260,\"row_types\":\"AQE=\",\"rows\":{},\"raw_rows\":null,\"table_info\":{\"schema-id\":2767,\"table-name\":{\"Schema\":\"ddl\",\"Table\":\"ta960c56f\",\"TableID\":2767,\"IsPartition\":false}},\"replicating_ts\":456724026756956209},{\"version\":0,\"dispatcher_id\":{\"low\":11766953444167129355,\"high\":7287039303564457910},\"physical_table_id\":2767,\"start_ts\":456724027962294620,\"commit_ts\":456724027962294621,\"table_info_version\":456724026363215891,\"seq\":119,\"state\":0,\"length\":1,\"approximate_size\":81,\"row_types\":\"AQ==\",\"rows\":{},\"raw_rows\":null,\"table_info\":{\"schema-id\":2767,\"table-name\":{\"Schema\":\"ddl\",\"Table\":\"ta960c56f\",\"TableID\":2767,\"IsPartition\":false}},\"replicating_ts\":456724026756956209},{\"version\":0,\"dispatcher_id\":{\"low\":11766953444167129355,\"high\":7287039303564457910},\"physical_table_id\":2767,\"start_ts\":456724027962294862,\"commit_ts\":456724027962294863,\"table_info_version\":456724026363215891,\"seq\":126,\"state\":0,\"length\":4,\"approximate_size\":364,\"row_types\":\"AgIBAQE=\",\"rows\":{},\"raw_rows\":null,\"table_info\":{\"schema-id\":2767,\"table-name\":{\"Schema\":\"ddl\",\"Table\":\"ta960c56f\",\"TableID\":2767,\"IsPartition\":false}},\"replicating_ts\":456724026756956209},{\"version\":0,\"dispatcher_id\":{\"low\":11766953444167129355,\"high\":7287039303564457910},\"physical_table_id\":2767,\"start_ts\":456724027975401530,\"commit_ts\":456724027975401531,\"table_info_version\":456724026363215891,\"seq\":128,\"state\":0,\"length\":1,\"approximate_size\":133,\"row_types\":\"AgI=\",\"rows\":{},\"raw_rows\":null,\"table_info\":{\"schema-id\":2767,\"table-name\":{\"Schema\":\"ddl\",\"Table\":\"ta960c56f\",\"TableID\":2767,\"IsPartition\":false}},\"replicating_ts\":456724026756956209},{\"version\":0,\"dispatcher_id\":{\"low\":11766953444167129355,\"high\":7287039303564457910},\"physical_table_id\":2767,\"start_ts\":456724027975401872,\"commit_ts\":456724027975401873,\"table_info_version\":456724026363215891,\"seq\":135,\"state\":0,\"length\":3,\"approximate_size\":253,\"row_types\":\"AgIBAQ==\",\"rows\":{},\"raw_rows\":null,\"table_info\":{\"schema-id\":2767,\"table-name\":{\"Schema\":\"ddl\",\"Table\":\"ta960c56f\",\"TableID\":2767,\"IsPartition\":false}},\"replicating_ts\":456724026756956209},{\"version\":0,\"dispatcher_id\":{\"low\":11766953444167129355,\"high\":7287039303564457910},\"physical_table_id\":2767,\"start_ts\":456724027975401956,\"commit_ts\":456724027975401957,\"table_info_version\":456724026363215891,\"seq\":136,\"state\":0,\"length\":2,\"approximate_size\":142,\"row_types\":\"AAA=\",\"rows\":{},\"raw_rows\":null,\"table_info\":{\"schema-id\":2767,\"table-name\":{\"Schema\":\"ddl\",\"Table\":\"ta960c56f\",\"TableID\":2767,\"IsPartition\":false}},\"replicating_ts\":456724026756956209}]"] [stack="github.com/pingcap/ticdc/pkg/sink/mysql.(*MysqlWriter).generateBatchSQLInSafeMode\n\tgithub.com/pingcap/ticdc/pkg/sink/mysql/mysql_writer_dml.go:200\ngithub.com/pingcap/ticdc/pkg/sink/mysql.(*MysqlWriter).generateBatchSQL\n\tgithub.com/pingcap/ticdc/pkg/sink/mysql/mysql_writer_dml.go:134\ngithub.com/pingcap/ticdc/pkg/sink/mysql.(*MysqlWriter).prepareDMLs\n\tgithub.com/pingcap/ticdc/pkg/sink/mysql/mysql_writer_dml.go:90\ngithub.com/pingcap/ticdc/pkg/sink/mysql.(*MysqlWriter).Flush\n\tgithub.com/pingcap/ticdc/pkg/sink/mysql/mysql_writer.go:203\ngithub.com/pingcap/ticdc/downstreamadapter/worker.(*MysqlDMLWorker).Run\n\tgithub.com/pingcap/ticdc/downstreamadapter/worker/mysql_worker.go:118\ngithub.com/pingcap/ticdc/downstreamadapter/sink.(*MysqlSink).Run.func1\n\tgithub.com/pingcap/ticdc/downstreamadapter/sink/mysql_sink.go:124\ngolang.org/x/sync/errgroup.(*Group).Go.func1\n\tgolang.org/x/[email protected]/errgroup/errgroup.go:78"]```

### Versions of the cluster

Upstream TiDB cluster version (execute `SELECT tidb_version();` in a MySQL client):

```console
(paste TiDB cluster version here)

Upstream TiKV version (execute tikv-server --version):

(paste TiKV version here)

TiCDC version (execute cdc version):

(paste TiCDC version here)