資料庫異機恢復開啟報錯ORA-36961

客戶在異機進行資料庫的不完全恢復，用來匯出被誤刪除的表，恢復完成後，開啟資料庫時出現了ORA-36961錯誤。

資料庫版本為10.2.0.4 for HP-UX，開啟資料庫前臺出現ORA-3113錯誤：

SQL> startup
Total System Global Area 4294967296 bytes
Fixed Size 2073472 bytes
Variable Size 805309568 bytes
Database Buffers 3472883712 bytes
Redo Buffers 14700544 bytes
Database mounted.
ORA-03113: end-of-file on communication channel

在啟動過程中，如果前臺出現ORA-3113錯誤，那麼後臺多半是ORA-600或ORA-7445錯誤，檢查告警日誌，卻發現出現了ORA-36961錯誤：

Error in executing triggers on database startup
ksedmp: internal or fatal error
ORA-00604: error occurred at recursive SQL level 1
ORA-12663: Services required by client not available on the server
ORA-36961: Oracle OLAP is not available.
ORA-06512: at "SYS.OLAPIHISTORYRETENTION", line 1
ORA-06512: at line 15
Error in executing triggers on instance shutdown
ksedmp: internal or fatal error
ORA-00604: error occurred at recursive SQL level 1
ORA-12663: Services required by client not available on the server
ORA-36961: Oracle OLAP is not available.
ORA-06512: at "SYS.OLAPIHISTORYRETENTION", line 1
ORA-06512: at line 15

顯然這個錯誤和OLAP元件的不正常有關。由於是異機恢復，很可能新的ORACLE_HOME安裝的OLAP元件與原始環境不一致，根據文件'Ora-36961 Oracle OLAP is Not Available' error During database Startup [ID 1291894.1]，需要啟用OLAP元件。由於OLAP元件所需要的xsyeolap.o檔案缺失，需要從安裝介質中獲取。首先需要從介質盤的目錄中複製Disk1/stage/Patches/oracle.rdbms.olap/10.2.0.5.0/1/DataFiles/filegroup1.1.1.jar檔案到臨時目錄，然後抽取檔案$ORACLE_HOME/jdk/bin/jar -xvf filegroup1.1.1.jar，最後將檔案xsyeolap.o複製到ORACLE_HOME/rdbms/lib：

% cd $ORACLE_HOME/rdbms/lib
% make -f ins_rdbms.mk olap_on ioracle

重啟資料庫既可。