v3.4.2 Release Note – Help Center

Release Date: April 10, 2025

FE supports graceful shutdown to improve system availability. When exiting FE via ./stop_fe.sh -g, FE will first return a 500 status code to the front-end Load Balancer via the /api/health API to indicate that it is preparing to shut down, allowing the Load Balancer to switch to other available FE nodes. Meanwhile, FE will continue to run ongoing queries until they finish or timeout (default timeout: 60 seconds). #56823

The following issues have been fixed:

Partition pruning might not work if the partition column is a generated column. #54543
Incorrect parameter handling in the concat function could cause a BE crash during query execution. #57522
The ssl_enable property did not take effect when using Broker Load to load data. #57229
When NULL values exist, querying subfields of STRUCT-type columns could cause a BE crash. #56496
When modifying the bucket distribution of a table with the statement ALTER TABLE {table} PARTITIONS (p1, p1) DISTRIBUTED BY ..., specifying duplicate partition names could result in failure to delete internally generated temporary partitions. #57005
In a shared-data cluster, running SHOW PROC '/current_queries' resulted in the error "Error 1064 (HY000): Sending collect query statistics request fails". #56597
Running INSERT OVERWRITE loading tasks in parallel caused the error "ConcurrentModificationException: null", resulting in loading failure. #56557
After upgrading from v2.5.21 to v3.1.17, running multiple Broker Load tasks concurrently could cause exceptions. #56512

The default value of the BE configuration item avro_ignore_union_type_tag has been changed to true, enabling the direct parsing of ["NULL", "STRING"] as STRING type data, which better aligns with typical user requirements. #57553
The default value of the session variable big_query_profile_threshold has been changed from 0 to 30 (seconds). #57177
A new FE configuration item enable_mv_refresh_collect_profile has been added to control whether to collect Profile information during materialized view refresh. The default value is false (previously, the system collected Profile by default). #56971