tiflow v6.4.0

Improvements

• Remove the useless operate-source update command from dmctl #7246 @buchuitoudegou
• Fix the issue that DM full import fails if the upstream database uses DDL statements that are incompatible with TiDB. You can create the schema of target tables in TiDB manually in advance using DDL statements supported by TiDB to ensure successful import #37984 @lance6716
• Support replicating the exchange partition DDL statements #639 @asddongmen
• Improve non-batch sending performance for the MQ sink module #7353 @hi-rustin
• Improve performance of TiCDC puller when a table has a large number of Regions #7078 #7281 @sdojjy
• Support reading historical data in the downstream TiDB by using the tidb_enable_external_ts_read variable when Syncpoint is enabled #7419 @asddongmen

Bug fixes

• Fix the issue that DM WebUI generates the wrong allow-list parameter #7096 @zoubingwu
• Fix the issue that a DM-worker has a certain probability of triggering data race when it starts or stops #6401 @liumengya94
• Fix the issue that when DM replicates an UPDATE or DELETE statement but the corresponding row data does not exist, DM silently ignores the event #6383 @GMHDBJD
• Fix the issue that the secondsBehindMaster field is not displayed after you run the query-status command #7189 @GMHDBJD
• Fix the issue that updating the checkpoint may trigger a large transaction #5010 @lance6716
• Fix the issue that in full task mode, when a task enters the sync stage and fails immediately, DM may lose upstream table schema information #7159 @lance6716
• Fix the issue that deadlock may be triggered when the consistency check is enabled #7241 @buchuitoudegou
• Fix the issue that task precheck requires the SELECT privilege for the INFORMATION_SCHEMA table #7317 @lance6716
• Fix the issue that an empty TLS configuration causes an error #7384 @liumengya94
• Fix the issue that sasl-password in the changefeed query result is not masked #7182 @dveeden
• Fix the issue that TiCDC might become unavailable when too many operations in an etcd transaction are committed #7131 @asddongmen
• Fix the issue that redo logs might be deleted incorrectly #6413 @asddongmen
• Fix performance regression when replicating wide tables in Kafka Sink V2 #7344 @hi-rustin
• Fix the issue that checkpoint ts might be advanced incorrectly #7274 @hi-rustin
• Fix the issue that too many logs are printed due to improper log level of the mounter module #7235 @hi-rustin
• Fix the issue that a TiCDC cluster might have two owners #4051 @asddongmen