Informix - Problem description
Problem IT32756 | Status: Closed |
DYNAMIC CHANGE OF LTAPEDEV TO NULL DEVICE MAY NOT MARK LOGS AS BACKED UP ON SECONDARY SERVERS | |
product: | |
INFORMIX SERVER / 5725A3900 / C10 - IDS 12.10 | |
Problem description: | |
The onmode -wm and onmode -wf commands may be used to dynamically change the value of the LTAPEDEV onconfig paramter to the null device, eg. /dev/null for Unix and Linux operating systems. When this command is run on a secondary server not all of the used log files may be marked as backed up. If the onmode command is then run again to change the LTAPEDEV parameter to a non-null value then a problem will occur when the logs cycle round and encounter those logs that have not been marked as backed up. The secondary server will become stuck trying to switch into the log that is not backed up with the logrecover thread spinning in a loop. A typical stack for this thread is: yield_processor_svp mt_yield lgr_set_logf dologrecvr th_init_initgls The thread will frequently be seen to be in a running state. Furthermore the communications with the primary server may become blocked. If the problem secondary server is an HDR then the primary may hang on a checkpoint request until such time as the timeout value set for the HDR communications is exceeded and the connection will be dropped. | |
Problem Summary: | |
**************************************************************** * USERS AFFECTED: * * Users of Informix Server prior to 12.10.xC15 and 14.10.xC6. * **************************************************************** * PROBLEM DESCRIPTION: * * See Error Description * **************************************************************** * RECOMMENDATION: * * Upgrade to Informix Server 12.10.xC15 (when available) or * * 14.10.xC6 (when available). * **************************************************************** | |
Local Fix: | |
Solution | |
Workaround | |
**************************************************************** * USERS AFFECTED: * * Users of Informix Server prior to 12.10.xC15 and 14.10.xC6. * **************************************************************** * PROBLEM DESCRIPTION: * * See Error Description * **************************************************************** * RECOMMENDATION: * * Upgrade to Informix Server 12.10.xC15 (when available) or * * 14.10.xC6 (when available). * **************************************************************** | |
Comment | |
Fixed in Informix Server 12.10.xC15 and 14.10.xC6. | |
Timestamps | |
Date - problem reported : Date - problem closed : Date - last modified : | 05.05.2020 12.05.2021 12.05.2021 |
Problem solved at the following versions (IBM BugInfos) | |
Problem solved according to the fixlist(s) of the following version(s) |