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_posts/2025-08-26-ADG-SWITCHOVER-Switching-to-New-Standby-Reports-Password-File-Mismatch.md

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+---
+layout: post
+title: "ADG SWITCHOVER Switching to New Standby Reports Password File Mismatch"
+excerpt: "After the original primary issued alter database switchover to escfsdb;, the new primary started normally.
+The new standby (original primary) started MRP and reported the following error: MRP0:Background Media Recovery terminated with error 46952"
+date: 2025-08-26 15:00:00 +0800
+categories: [ORA-46952, Oracle, Database]
+tags: [mismtch for password, oracle]
+image: /assets/images/posts/ADG-SWITCHOVER-Switching-to-New-Standby-Reports-Password-File-Mismatch.jpg
+---
+
+## Problem Description  
+Oracle 12.2 RAC ADG switchover primary/standby switch.  
+After the original primary issued `alter database switchover to escfsdb;`, the new primary started normally.  
+The new standby (original primary) started MRP and reported the following error:  
+```
+MRP0:Background Media Recovery terminated with error 46952
+2023-09-17T00:09:43.472636+08:00
+Errors in file /u01/app/oracle/diag/rdbms/ef/ef1/trace/ef1_pr00_221142.trc:
+ORA-46952:standby database format mismtch for password file '+DATAC1/ef/PASSWORD/pwdef.359.1001353187'
+```
+
+## Analysis  
+Primary, DB alert log  
+```
+Starting ORACLE instance (normal) (OS id: 214994)
+2023-09-17T00:08:51.478593+08:00
+CLI notifier numLatches:131 maxDescs:5068
+2023-09-17T00:08:51.481305+08:00
+
+2023-09-17T00:08:51.481378+08:00
+Dump of system resources acquired for SHARED GLOBAL AREA (SGA)
+
+...
+
+2023-09-17T00:09:22.805928+08:00
+replication_dependency_tracking turned off (no async multimaster replication found)
+Physical standby database opened for read only access.
+Completed: ALTER DATABASE OPEN /* db agent *//* {1:25046:29480} */
+
+...
+
+2023-09-17T00:09:42.104231+08:00
+Archived Log entry 747327 added for thread 1 sequence 187866 rlc 1001353316 ID 0xf03f7b79 LAD2 :
+2023-09-17T00:09:42.454884+08:00
+Completed: alter database recover managed standby database using current logfile disconnect from session
+2023-09-17T00:09:42.510539+08:00
+
+...
+
+2023-09-17T00:09:43.353601+08:00
+Media Recovery Waiting for thread 2 sequence 184825 (in transit)
+2023-09-17T00:09:43.357045+08:00
+Recovery of Online Redo Log: Thread 2 Group 31 Seq 184825 Reading mem 0
+Mem# 0: +DATAC1/ef/ONLINELOG/group_31.443.1011206587
+MRP0: Background Media Recovery terminated with error 46952
+2023-09-17T00:09:43.472636+08:00
+Errors in file /u01/app/oracle/diag/rdbms/ef/ef1/trace/ef1_pr00_221142.trc:
+ORA-46952: standby database format mismatch for password file '+DATAC1/ef/PASSWORD/pwdef.359.1001353187' <<<<<<< Here
+2023-09-17T00:09:43.474426+08:00
+Managed Standby Recovery not using Real Time Apply
+2023-09-17T00:09:43.755738+08:00
+Clearing online redo logfile 3 complete
+Clearing online redo logfile 4 +DATAC1/ef/ONLINELOG/group_4.372.1001353523
+```
+This phenomenon of ours is a good match for "Standby Database MRP Fails With ORA-46952: Standby Database Format Mismatch For Password ( Doc ID 2503352.1 )". The final solution is to copy the password file from the primary database to the standby database.  
+
+## Solution  
+1- Rename all password files on standby.  
+2- Start the archive apply:  
+```
+SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE DISCONNECT FROM SESSION;
+```
+3- Copy the password file from production node 1 to standby.  
+Since version 12.2 is already out of premier support, it is recommended to upgrade to version 19c as soon as possible. Thank you.  
+
+## REFERENCE INFORMATION  
+Standby Database MRP Fails With ORA-46952: Standby Database Format Mismatch For Password (Doc ID 2503352.1)