The standby database has been delayed. Check that the MRP is wait_ for_ Log, apply after restarting MRP_ Log but wait again later_ for_ log

select error,status from gv$archive_dest where dest_id=10;

• ORA-16191: Primary log shipping client not logged on standby

The analysis reason ：
11g Changing the password in one instance will not be synchronized to other instances and standby databases , Although with scan Connect , however scan Is load distribution ip Of , Later, the connection will fall on an instance .
12CR2 The password file will be synchronized later , And the password file is saved in ASM Shared files .

• 12c Of DG Automatically synchronize password files