starrocks

Release Date: June 5, 2026

Behavior Changes

• get_json_string and the other get_json_* functions now return the JSON parse error instead of NULL when implicit VARCHAR-to-JSON parsing fails under ALLOW_THROW_EXCEPTION. The default behavior (returning NULL when the mode is disabled) is unchanged. #73199
• pipeline_enable_large_column_checker is now enabled by default. #72798

Improvements

• Lake write-path load spill files now use a flat, single-level directory layout with the transaction ID baked into each filename, and are reclaimed by a txn-id-based vacuum pass. This moves bulk deletes off the write hot path and lets vacuum clean up spill files leaked by BE crashes. #73064
• SHOW statements (such as SHOW GRANTS and SHOW WAREHOUSES) are now allowed inside an explicit transaction, so BI/JDBC clients that automatically issue SHOW no longer break the transaction flow. #72954
• Java UDAF and UDTF now support STRUCT arguments and return types. #72911
• Scalar Java UDF now supports STRUCT arguments. #72620
• Java UDF now supports DATE and DATETIME types. #72337
• Java UDF now supports nested ARRAY/MAP types. #72283
• Added the FE configuration deploy_serialization_min_thread_pool_size. #72274
• Skipped redundant partition key expression building when an add_partition_value deduplication hit occurs. #73156
• Avoided a redundant latestSnapshot() call in PaimonMetadata#getTableVersionRange. #72892
• Deduplicated commutative AND/OR expressions in scalar operator common subexpression elimination. #72823

Bug Fixes

The following issues have been fixed:

• A memory leak introduced by the UDAF cache. #74025
• An incorrect implementation in aggregate combined functions. #74169
• An issue in shared-data combined txn log mode where the per-partition coordinator claim was not re-recorded on every sender's open, which could drop txn logs. #73962
• A read failure on Iceberg tables that use a custom LocationProvider, fixed by lazily initializing the LocationProvider in SerializableTable. #73482
• A serialization failure caused by the de.javakaffee UnmodifiableCollectionsSerializer, now replaced with a Java 17-compatible version. #73458
• HdfsFsManager copy error messages now include the underlying cause. #73414
• A concurrent SegmentFlushTask race in DeltaWriter::commit(). #73371
• Sort merge provider errors are now propagated to the fragment context instead of being lost. #73337
• An issue where Ranger row-filter/masking policies on Hive views were skipped, so policies on the view or its base tables were not applied. #73265
• Upgraded libthrift to 0.23.0 to address a security vulnerability (CVE). #73243
• An FE file-descriptor leak, fixed by reusing HttpClient instances. #73239
• Parquet broker load errors now include file/column/row context. #73236
• A slot lookup failure for output slots with an empty col_name in the Spark connector external scan. #73225
• A crash in SinkBuffer during graceful exit. #73202
• Query cache conflicts with local shuffle aggregation. #73194
• A use-after-free of the Hive partition descriptor across fragment teardown. #73176
• A thread-safety issue in lake vacuum, fixed by using localtime_r. #73088
• A race condition between PipelineTimerTask doRun and unscheduling during query context destruction. #73082
• Lock contention on read-only query-engine paths, reduced by relaxing DB locks. #73067
• An materialized view refresh failure with SQL Server tables in a JDBC catalog. #72962
• A JNI local-reference leak in JDBCScanner::_init_jdbc_scanner. #72913
• An issue where partition TopN could lose a child's output column. #72848
• An incorrect plan caused by not clearing LambdaArgument.transformedOp before INSERT OVERWRITE re-planning. #72832
• The coordinator lock was held during external resource cleanup. #72830
• Locker rollback is now exception-safe and the unlock order is fixed. #72789
• An incorrect byte order in ColumnDict.merge, now using unsigned byte order. #72778
• A stack-buffer-overflow when formatting into a temporary std::string. #72728
• The HAVING clause is now checked when disabling aggregation spill on a small LIMIT. #72705
• A hang caused by joining forwarded RPCs when draining the runtime_filter worker. #72626
• Incorrect lazy-materialization slot nullability for a materialized view over an outer join. #72621
• merge_condition was not preserved when applying a normal rowset commit. #72542
• Lock contention in TabletScheduler / TabletSchedCtx hot paths during clone, reduced by relaxing DB locks. #72475
• Locker did not roll back a partial intensive-lock acquisition. #72423
• A spillable hash join probe crash. #72397
• COALESCE children are now cast to a common type in the JOIN USING transformer. #72338
• DB READ lock was held too broadly for single-table proc directories, now relaxed to per-table. #72334
• A memory leak when caching the materialized view plan context. #72300
• FSE-v2 did not set the schema for shared-data sorted schema change. #72235
• ConsistencyChecker held a DB READ lock too broadly in periodic scans, now relaxed to per-table READ. #72218
• A BE crash when querying information_schema.warehouse_queries. #72019
• A trailing \r was not stripped before the closing enclose in CRLF CSV inputs. #71866
• Paimon primary key columns were incorrectly marked as non-nullable when querying an external catalog. #71660
• A redundant double slash was created when constructing the JDBC URL if the URI already ended with a trailing slash, breaking strict drivers such as ClickHouse. #70992