v25.2.6

Bug Fixes

• Fix a small bug where metrics registrations could hang around briefly after a partition is stopped. by @oleiman in #27768
• Redpanda will now properly clean up discarded on-disk files on certain error cases in the Iceberg topics write path. by @andrwng in #27765
• #27344 Fixed an issue with metrics being registered twice when using an Iceberg REST catalog. by @wdberkeley in #27688
• #27731 Iceberg/JSON Schema: Fix a bug where we would fail to parse integers when schema indicates number (floating point). by @nvartolomei in #27735

Improvements

• Log cluster configuration updates by @daisukebe in #27730
• Prevents an oversized allocation in raft heartbeats. by @WillemKauf in #27776
• Prevents an oversized allocation in the partition balancing subsystem. by @WillemKauf in #27760
• Redpanda will now log less frequently to warn about using the default Iceberg partition spec with ÅWS Glue. by @andrwng in #27743
• Redpanda will now log trace-level messages about failed requests to the Iceberg REST catalog. by @andrwng in #27743
• Via the Kafka API, Credentials of superusers are permitted to be altered or removed only by an authenticated superuser. by @IoannisRP in #27702

Full Changelog: v25.2.5...v25.2.6