OceanBase Database Proxy Enterprise Edition V4.3.6

V4.3.6 BP1

Version information

• Release date: January 9, 2026

• Version: V4.3.6 BP1

• RPM version: obproxy-4.3.6.1-212026010819

Bug fixes

• Fixed missing port information for VIPs under the ppv2 protocol.
• Fixed disconnections caused by cs_id leaks.
• Fixed application errors preventing access to OceanBase clusters after startup.
• Fixed high latency for business SQL prepare execution.
• Fixed ODP logs not honoring log configuration (syslog_level), risking log loss.
• Fixed disconnections on weak-read PREPARE.
• Fixed error 4013 in OBKV stress tests with OceanBase Database V4.3.5 and ODP V4.3.6.
• Fixed actual log file size being max_log_file_size/2 when max_log_file_size was set.

V4.3.6

Version information

• Release date: November 10, 2025

• Version: V4.3.6

• RPM version: obproxy-4.3.6.0-192025110620

Version overview

ODP V4.3.6 is the latest long-term support (LTS) release in the ODP 4.3.x series. It focuses on stability and core upgrades and is recommended for POC and production on cloud and on-premises. For the SQL proxy, it adds Azure ppv2 support; logout logging for auditing and observability; memory and fragmentation improvements; dynamic adjustment when memory limits are exceeded; and improved CRASH interception. For the RPC proxy, it adds kernel-feedback re-routing, the new HBase put protocol, RPC request lifecycle control, and improved retries and cross-partition sub-request handling.

Key features

SQL proxy

Connection management

Under Azure ppv2, PP2_SUBTYPE_AZURE_PRIVATEENDPOINT_LINKID maps to tenant information. The new ODP version parses this field to support ppv2 on Azure.

Stability improvements

• Memory optimization

  • Reduced fragmentation-prone PS module allocations.

  • When memory exceeds the limit, ODP can raise its memory ceiling via signals to avoid alarms and new connection failures.

• Improved CRASH signal interception via enable_crash_error_log (default True, dynamically configurable).

Usability improvements

Logout events (COM_QUIT) are logged to obproxy_diagnosis.log with unified disconnect formats alongside existing login and abnormal disconnect logs.

RPC proxy

Routing improvements

Re-routing when routing is inaccurate, using OceanBase feedback. With distributed routing, clients must supply tablet_id and option_flag; OceanBase uses both to enable distributed execution.

Connection management

New HBase put fast path in OBKV reduces layered conversion overhead after parsing.

Stability improvements

• RPC request lifecycle control for client_net_handler, request_sm, and server_net_handler states.

• Improved retries around schema changes and stale location cache.

• Decoupled parent/child and state machines for cross-partition OBKV sub-requests.

Usability improvements

rpc_enable_sub_req_log controls Slow RPC and digest logging for sub-requests.

Compatibility changes

Parameter changes

Supported OceanBase Database versions

OceanBase Database 4.x, 3.x, and earlier:

• For 3.x and earlier, use ODP V3.2.11.

• For 4.x, use the latest ODP V4.3.1 BP or V4.3.6 BP (LTS).

Known issues

Clusters with client_session_id_version=2 running more than seven days may see connection failures. Upgrade to a fixed build.

Bug fixes

• Fixed slow memory release after disconnect when text PS prepare pushed memory above 90%.
• Fixed ODP startup when /etc/hosts lacked IP hostnames.
• Fixed negative odp_current_session with service_name, causing false OCP alarms.
• Fixed memory leaks on COM_RESET_CONNECTION / COM_CHANGE_USER variable sync.
• Fixed overflow when getaddrinfo returned more than 64 IPs.
• Fixed inaccurate DML routing for column names containing #.
• Fixed core after digest_sql_length changes due to stack limits.
• Fixed client hangs on multi-request sends with fast OceanBase responses.
• Fixed core when SQL contained status.
• Fixed hang with service_name and SQL over 16 MB.
• Fixed 30s timeout on show proxymemory objpool; under leak diagnostics.
• Fixed stack overflow parsing round(9.99,-9.9), round(9.99,-10), round(99.99,-20).
• Fixed core on non-partitioned OB_SCHEMA_ERROR retry with empty part info.
• Fixed core for large requests with xa_start variable sync.
• Fixed proxysys unable to connect when ODP was over memory limit.
• Fixed routing when multi-column partition metadata fetch failed.
• Fixed error 4016 when tablet_id retries exhausted after split.
• Fixed errors when PS close/reset did not sync session.
• Fixed errors when TRUNCATE changed routing before cache refresh on retry.
• Fixed occasional failure disabling distributed routing due to thread cache.
• Fixed uncleared sub-requests when OceanBase could not respond and ODP could not read results.
• Fixed error 4016 on cross-partition requests during TRUNCATE.
• Fixed no performance recovery within 2 minutes when isolating the RPC port with rpc_enable_congestion off.
• Fixed error 4016 for over 2 minutes on node offline with rpc_enable_congestion off.
• Fixed possible leak when part_num was 0 fetching table_entry on single-partition routing.
• Fixed error 4016 when PS close sync returned wrong transaction-end flags from OceanBase.