DB2 - Problem description
Problem IT41276 | Status: Closed |
SUSTAINED TRAP ON HADR STANDBY BLOCKS REPLAY-ONLY WINDOW | |
product: | |
DB2 FOR LUW / DB2FORLUW / B50 - DB2 | |
Problem description: | |
This problem only occurs on HADR standby database with the Reads On Standby (ROS) feature enabled. When the standby database replays a DDL or maintenance operation that requires a replay-only window, it needs to force off all ROS connections. This step can be blocked when there is suspended EDU due to a previous trap that can be sustained. The log replay on the standby will be blocked. Below is an example of the stack dump of the db2redom EDU that encounters this problem: 0x0900000000113994 thread_wait + 0x94 0x09000000141F26F4 sqloWaitEDUWaitPost + 0x1D4 0x090000001367E540 HdrForceAppsInReplayOnlyWindow__16sqeLocalDatabaseFP8sqeAgent + 0xAFC 0x0900000013677D84 sqlpPRecReadLog__FP8sqeAgentP8SQLP_ACBP9SQLP_DBCB + 0x12A8 0x0900000016296EB8 sqlpParallelRecovery__FP8sqeAgentP5sqlca + 0x14 0x090000001347C500 sqleSubCoordProcessRequest__FP8sqeAgent + 0x1F8 0x090000001457A3D4 RunEDU__8sqeAgentFv + 0x3AC 0x09000000140BDE3C EDUDriver__9sqzEDUObjFv + 0xF8 0x09000000140C3580 sqloEDUEntry + 0x264 After encountering this problem, the only way to resolve is to recycle the standby instance. | |
Problem Summary: | |
**************************************************************** * USERS AFFECTED: * * all * **************************************************************** * PROBLEM DESCRIPTION: * * See Error Description * **************************************************************** * RECOMMENDATION: * * Upgrade to Db2 V12.1 * **************************************************************** | |
Local Fix: | |
Solution | |
Workaround | |
**************************************************************** * USERS AFFECTED: * * all * **************************************************************** * PROBLEM DESCRIPTION: * * See Error Description * **************************************************************** * RECOMMENDATION: * * Upgrade to Db2 V12.1 * **************************************************************** | |
Timestamps | |
Date - problem reported : Date - problem closed : Date - last modified : | 19.06.2022 04.07.2022 08.09.2022 |
Problem solved at the following versions (IBM BugInfos) | |
Problem solved according to the fixlist(s) of the following version(s) |