For Oracle RAC sources, if the Extractor is configured to read change data only from archived redo logs, the Extractor executes ALTER SYSTEM ARCHIVE LOG CURRENT command in the beginning of the run. Then the Extractor waits for the archived redo logs for each Oracle redo thread to appear in the log directory. If the archived redo log with the expected log sequence number does not appear in the log directory after the specified amount of time, the Extractor reports this error and ends processing.
You can configure the related Extractor behavior by using the following runtime parameters in the replication configuraiton:
extract.log_wait_print_warning_cycles
extract.log_wait_cycles
extract.log_wait_cycle_time
Verify that the directory to which Oracle writes archived redo logs matches the log directory that is specified in the replication configuration.