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  • 解决DGMGRL Unable to connect to database ORA12541: TNS:no listener问题

    晚上配了一套11.2.0.2 的DataGuard物理备库,准备用DGMGRL做切换测试,结果发现在切换过程中会遇到"Unable to connect to database"的问题,具体日志如下:  
    DGMGRL> switchover to dgogg
    Performing switchover NOW, please wait...
    New primary database "dgogg" is opening...
    Operation requires shutdown of instance "SBDB" on database "sbdb"
    Shutting down instance "SBDB"...
    ORACLE instance shut down.
    Operation requires startup of instance "SBDB" on database "sbdb"
    Starting instance "SBDB"...
    Unable to connect to database
    ORA-12541: TNS:no listener
    
    Failed.
    Warning: You are no longer connected to ORACLE.
    
    Please complete the following steps to finish switchover:
            start up instance "SBDB" of database "sbdb"
      ORA-12541: TNS:no listener显然是因为DGMGRL使用的连接串ConnectIdentifier存在问题,但是在创建DGMGRL的Configuration之前我已经将SERIVCENAME_DGMGLR形式的静态信息添加到listener.ora文件中了,如:  
    DGLSN =
      (DESCRIPTION =
        (ADDRESS = (PROTOCOL = TCP)(HOST = vrh3.oracle.com)(PORT = 1588))
      )
    
    SID_LIST_DGLSN =
      (SID_LIST =
        (SID_DESC =
          (GLOBAL_DBNAME = DGOGG)
          (ORACLE_HOME = /s01/orabase/product/11.2.0/dbhome_1)
          (SID_NAME = DGOGG)
        )
        (SID_DESC =
          (GLOBAL_DBNAME = DGOGG_DGB)
          (ORACLE_HOME = /s01/orabase/product/11.2.0/dbhome_1)
          (SID_NAME = DGOGG)
        )
    
        (SID_DESC =
          (GLOBAL_DBNAME = DGOGG_DGMGRL)
          (ORACLE_HOME = /s01/orabase/product/11.2.0/dbhome_1)
          (SID_NAME = DGOGG)
        )
      )
      查了半天最后终于发现时因为监听端口的问题,我创建的LISTENER DGLSN使用1588端口,而dgmgrl中的静态连接串默认使用1521端口,如:  
    DGMGRL> show database dgogg
    
    Database - dgogg
    
      Role:            PRIMARY
      Intended State:  TRANSPORT-ON
      Instance(s):
        DGOGG
    
    Database Status:
    SUCCESS
    
    DGMGRL> show database verbose dgogg
    
    Database - dgogg
    
      Role:            PRIMARY
      Intended State:  TRANSPORT-ON
      Instance(s):
        DGOGG
    
      Properties:
        DGConnectIdentifier             = 'dgogg_dgb'
        ObserverConnectIdentifier       = ''
        LogXptMode                      = 'sync'
        DelayMins                       = '0'
        Binding                         = 'optional'
        MaxFailure                      = '0'
        MaxConnections                  = '1'
        ReopenSecs                      = '300'
        NetTimeout                      = '30'
        RedoCompression                 = 'DISABLE'
        LogShipping                     = 'ON'
        PreferredApplyInstance          = ''
        ApplyInstanceTimeout            = '0'
        ApplyParallel                   = 'AUTO'
        StandbyFileManagement           = 'MANUAL'
        ArchiveLagTarget                = '0'
        LogArchiveMaxProcesses          = '4'
        LogArchiveMinSucceedDest        = '1'
        DbFileNameConvert               = ''
        LogFileNameConvert              = ''
        FastStartFailoverTarget         = ''
        InconsistentProperties          = '(monitor)'
        InconsistentLogXptProps         = '(monitor)'
        SendQEntries                    = '(monitor)'
        LogXptStatus                    = '(monitor)'
        RecvQEntries                    = '(monitor)'
        SidName                         = 'DGOGG'
        StaticConnectIdentifier         = '(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=vrh3.oracle.com)
        (PORT=1521))(CONNECT_DATA=(SERVICE_NAME=DGOGG_DGMGRL)(INSTANCE_NAME=DGOGG)(SERVER=DEDICATED)))'
        StandbyArchiveLocation          = '/s01/orabase/arch'
        AlternateLocation               = ''
        LogArchiveTrace                 = '0'
        LogArchiveFormat                = '%t_%s_%r.dbf'
        TopWaitEvents                   = '(monitor)'
      了解到问题所在后就容易解决了,只需要修改Broker中的StaticConnectIdentifier就可以了:  
    edit database dgogg set property StaticConnectIdentifier='(DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = vrh3.oracle.com)(PORT = 1588)) (CONNECT_DATA =
    (SERVER = DEDICATED) (SERVICE_NAME = DGOGG_DGMGRL)))';
    
    edit database sbdb set property StaticConnectIdentifier='(DESCRIPTION =
    (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = vrh4.oracle.com)(PORT = 1588))) (CONNECT_DATA =
    (SERVICE_NAME = SBDB_DGMGRL)))';
      再次尝试切换Switchover DataGuard,不再需要手动启动standby 实例了:  
    DGMGRL> switchover to sbdb;
    
    Performing switchover NOW, please wait...
    New primary database "sbdb" is opening...
    Operation requires shutdown of instance "DGOGG" on database "dgogg"
    Shutting down instance "DGOGG"...
    ORACLE instance shut down.
    Operation requires startup of instance "DGOGG" on database "dgogg"
    Starting instance "DGOGG"...
    ORACLE instance started.
    Database mounted.
    Database opened.
    Switchover succeeded, new primary is "sbdb"
    
    DGMGRL> show configuration
    
    Configuration - dgogg
    
      Protection Mode: MaxAvailability
      Databases:
        sbdb  - Primary database
        dgogg - Physical standby database
    
    Fast-Start Failover: DISABLED
    
    Configuration Status:
    SUCCESS
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  • 原文地址:https://www.cnblogs.com/macleanoracle/p/2968003.html
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