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環(huán)境介紹:前幾天搭建了一套 二節(jié)點單實例的 linux+oracle11.2.0.3+dataguard maximize availability 的環(huán)境。
故障現(xiàn)象:今天發(fā)現(xiàn)不能同步了,在trace文件alert_orcl.log里發(fā)現(xiàn)有報錯信息MRP進程啟不來
MRP0: Background Media Recovery terminated with error 328
ORA-00328: 8386238 , 8972415
ORA-00334: '/opt/oracle/fast_recovery_area/DG_BEI/archivelog/2014_09_28/o1_mf_1_830_b2h9mjmn_.arc'
在報上述錯誤前trace文件alert_orcl.log有報與主庫網(wǎng)絡(luò)中斷錯誤
RFS[4]: Assigned to RFS process 20669
RFS[4]: Possible network disconnect with primary database
Sun Sep 28 13:23:48 2014
MRP0: Background Media Recovery terminated with error 328詳細報錯信息如下:
Mon Sep 29 14:32:28 2014
alter database recover managed standby database using current logfile disconnect from session nodelay
Attempt to start background Managed Standby Recovery process (orcl)
Mon Sep 29 14:32:28 2014
MRP0 started with pid=27, OS id=23710
MRP0: Background Managed Standby Recovery process started (orcl)
started logmerger process
Mon Sep 29 14:32:33 2014
Managed Standby Recovery starting Real Time Apply
Parallel Media Recovery started with 2 slaves
Waiting for all non-current ORLs to be archived...
All non-current ORLs have been archived.
Clearing online redo logfile 1 /opt/oracle/oradata/orcl/redo01.log
Clearing online log 1 of thread 1 sequence number 835
Clearing online redo logfile 1 complete
Clearing online redo logfile 2 /opt/oracle/oradata/orcl/redo02.log
Clearing online log 2 of thread 1 sequence number 834
Clearing online redo logfile 2 complete
Clearing online redo logfile 3 /opt/oracle/oradata/orcl/redo03.log
Clearing online log 3 of thread 1 sequence number 835
Clearing online redo logfile 3 complete
Media Recovery Log /opt/oracle/fast_recovery_area/DG_BEI/archivelog/2014_09_28/o1_mf_1_830_b2h9mjmn_.arc
Errors with log /opt/oracle/fast_recovery_area/DG_BEI/archivelog/2014_09_28/o1_mf_1_830_b2h9mjmn_.arc
MRP0: Background Media Recovery terminated with error 328
Errors in file /opt/oracle/diag/rdbms/dg_bei/orcl/trace/orcl_pr00_23712.trc:
ORA-00328: 8386238 , 8972415
ORA-00334: : '/opt/oracle/fast_recovery_area/DG_BEI/archivelog/2014_09_28/o1_mf_1_830_b2h9mjmn_.arc'
Managed Standby Recovery not using Real Time Apply
Recovery interrupted!
Completed: alter database recover managed standby database using current logfile disconnect from session nodelay
MRP0: Background Media Recovery process shutdown (orcl)
Mon Sep 29 14:34:06 2014
RFS[1]: Assigned to RFS process 23726
RFS[1]: Opened log for thread 1 sequence 836 dbid 1356850190 branch 829069458
Archived Log entry 77 added for thread 1 sequence 836 rlc 829069458 ID 0x50df5e0e dest 2:
Mon Sep 29 14:34:08 2014
Primary database is in MAXIMUM AVAILABILITY mode
Changing standby controlfile to RESYNCHRONIZATION level
Standby controlfile consistent with primary
RFS[2]: Assigned to RFS process 23728
RFS[2]: Selected log 4 for thread 1 sequence 838 dbid 1356850190 branch 829069458
Mon Sep 29 14:34:08 2014
RFS[3]: Assigned to RFS process 23730
RFS[3]: Selected log 5 for thread 1 sequence 837 dbid 1356850190 branch 829069458
Mon Sep 29 14:34:08 2014
Archived Log entry 78 added for thread 1 sequence 837 ID 0x50df5e0e dest 1:
Changing standby controlfile to MAXIMUM AVAILABILITY level
RFS[2]: Selected log 5 for thread 1 sequence 839 dbid 1356850190 branch 829069458
Mon Sep 29 14:34:11 2014
Archived Log entry 79 added for thread 1 sequence 838 ID 0x50df5e0e dest 1:
處理過程:
1.備庫上檢查恢復(fù)相關(guān)的進程,確實少了MRP
select process,status,sequence# from v$managed_standby;
2.在備庫上檢查歸檔日志視圖
sql>select name,sequence#,applied from v$archived_log;
奇怪的事:trace日志中報錯的歸檔日志顯示被應(yīng)用了,如紅框中示
3.對比主庫與備庫 2014_09_28歸檔日志,數(shù)據(jù)和大小都不一樣,備庫比主庫日志數(shù)量要多,但比主庫要小,如下圖示:(估計是傳輸日志的時候剛好網(wǎng)絡(luò)中斷造成的大小不一致)
4.萬能的google搜索,大概是歸檔日志傳輸出錯,從主庫copy日志到備庫,然后再執(zhí)行恢復(fù)
4.1 以防萬一,先將備庫2014_09_28歸檔日志備份一下,然后刪除備庫2014_09_28歸檔文件夾
4.2 從主庫上scp 復(fù)制2014_09_28歸檔文件夾到備庫
4.3 備庫上執(zhí)行恢復(fù)操作
SQL> alter database recover managed standby database using current logfile disconnect;
查看trace日志顯示正常了
5.到備庫上確認歸檔日志 sql>select name,sequence#,applied from v$archived_log;
顯示能正常應(yīng)用了,不過有一個日志(紅框中示)沒用應(yīng)用,我猜因為從主庫copy過來的日志文件沒有這個文件(只5個,原備庫有8個),檢查了數(shù)據(jù)是正常的。故障應(yīng)該算是解決了。
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