Release Note 2.1.2

[yiguolei]

Release Note 2.1.1

Behavior Changed

1. Set the default value of the data_consistence property of EXPORT to partition to make export more stable during load. [fix](Export) Set the default value of the data_consistence property of export to partition #32830
2. Some of mysql connector (eg, dotnet MySQL.Data) rely on variable's column type to make connection.
   eg, select @@autocommit should with column type BIGINT, not BIT, otherwise it will throw error. So we change column type of @@autocommit to BIGINT. [fix](variables) change column type of @@autocommit to BIGINT #33282

Upgrade Problem

1. Normal workload group is not created when upgrade from 2.0 or other old versions. [Fix](executor)Fix normal group can not be appended when image exits #33197

New Feature

1. Add processlist table in information_schema database, users could use this table to query active connections. [Feature](information_schema) add processlist table for information_schema db #32511
2. Add a new table valued function local to allow access file system like shared storage. [local-tvf] add shared_storage parameter doc doris-website#494

Optimization

1. Skip some useless process to make graceful stop more quickly in k8s env. [bugfix](stop) should skip the loop when graceful stop #33212
2. Add rollup table name in profile to help find the mv selection problem. [profile](name) add table rollup name in profile #33137
3. Add test connection function to DB2 database to allow user check the connection when create DB2 catalog. [fix](jdbc catalog) fix db2 test connection sql #33335
4. Add DNS Cache for FQDN to accelerate the connect process among BEs in k8s env. [opt](fqdn) Add DNS Cache for FE and BE #32869
5. Refresh external table's rowcount async to make the query plan more stable. [opt](rowcount) refresh external table's rowcount async #32997

Bugfix

1. Fix iceberg catalog of hms and hadoop do not support iceberg properties like "io.manifest.cache-enabled" to enable manifest cache in iceberg. [BugFix](Iceberg Catalog) Fix iceberg catalog of hms and hadoop not support iceberg properties #33113
2. The offset params in lead/lag function could use 0 as offset. [improve](function) the offset params in lead/lag function could use 0 #33174
3. Fix some timeout issues with load. [bugfix](asyncwriter) async writer's lock should not include finish or close method #33077 [fix](move-memtable) fix timeout to get tablet schema (#33256) #33260
4. Fix core problem related with array/map/struct compaction process. [FIX](agg) fix vertical_compaction_reader for agg table with array/map type #33130 [Bug](array) fix array column core dump in get_shrinked_column as not check type #33295
5. Fix runtime filter wait timeout. [pipelineX](runtime filter) Fix task timeout caused by runtime filter(#33332) #33369
6. Fix unix_timestamp core for string input in auto partition. [Fix](function) Fix unix_timestamp core for string input #32871

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