The Primary Database was giving error in alert log that it was not able to send archivelogs to Standby. The error looked like the following: Tue Jun 5 10:31:36 2012 Errors in file /u01/oracle/admin/DB1/bdump/DB1_arcp_6846.trc: ORA-16055: FAL request rejected ARCH: FAL archive failed. Archiver continuing Diagnosis: To check the status of archiving the following sql was issued: Check what is the destination status select ds.dest_id id, ad.status, ds.database_mode db_mode, ad.archiver type, ds.recovery_mode, ds.protection_mode, ds.standby_logfile_count "SRLs", ...