Logger temporarily in single log mode, using [primary | secondary] log
active.log.dataset.name
The Physical Logger encountered an error when trying to allocate or initialize an active log data set. Messages will have been issued previously to identify exactly what type of problem occurred. This message will only be issued if dual logging has been specified for active log data. The message identifies which data set is used as the active log data set, and whether that is the primary or secondary active log.
The Logger will temporarily switch to single logging mode, but will continue operating normally otherwise. The Logger will resume dual logging mode when it switches to the next pair of active logs, assuming that both the primary and secondary active logs can be allocated and initialized.
Investigate the earlier messages that indicate why the primary or secondary active log could not be used, and take any corrective action they indicate. If you cannot correct the problem, contact Informatica Corporation Product Support.