redo日志损坏

1.1归档模式，不是当前正在日志损坏，数据库打开模式。
模拟损坏：

SQL> archive log list;

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Database log mode             Archive Mode

Automatic archival            Enabled

Archive destination           USE_DB_RECOVERY_FILE_DEST

Oldest online log sequence    951

Next log sequence to archive  953

Current log sequence          953

SQL> select * from v$log;

   GROUP#   THREAD# SEQUENCE#     BYTES BLOCKSIZE   MEMBERS ARC STATUS    FIRST_CHANGE# FIRST_TIME  NEXT_CHANGE# NEXT_TIME

---------- ---------- ---------- ---------- ---------- ---------- --- ---------- ------------- ------------ ------------ ------------

        1         1       952  52428800       512         1 YES INACTIVE        4059877 24-JAN-18        4064774 24-JAN-18

        2         1       953  52428800       512         1 NO CURRENT         4064774 24-JAN-18     2.8147E+14

        3         1       951  52428800       512         1 YES INACTIVE        4021213 24-JAN-18        4059877 24-JAN-18

SQL> select member from v$logfile;

MEMBER

--------------------------------------------------

/u01/app/oracle/oradata/DBdb/redo03.log

/u01/app/oracle/oradata/DBdb/redo02.log

/u01/app/oracle/oradata/DBdb/redo01.log

SQL>SQL> !rm -rf /u01/app/oracle/oradata/DBdb/redo03.log

SQL> !ls /u01/app/oracle/oradata/DBdb/redo*

/u01/app/oracle/oradata/DBdb/redo01.log /u01/app/oracle/oradata/DBdb/redo02.log

切换日志：

SQL> alter system switch logfile;

System altered.

SQL> alter system switch logfile;

System altered.

SQL> /

查看alert日志提示错误

Errors in file /u01/app/oracle/diag/rdbms/dbdb/DBdb/trace/DBdb_arc3_2018.trc:

ORA-00313: ( 1)?

ORA-00312: 3 1: '/u01/app/oracle/oradata/DBdb/redo03.log'

ORA-27037:??

Linux-x86_64 Error: 2: No such file or directory

Additional information: 3

Master archival failure: 313

Errors in file /u01/app/oracle/diag/rdbms/dbdb/DBdb/trace/DBdb_arc0_2012.trc:

ORA-00313: ( 1)?

ORA-00312: 3 1: '/u01/app/oracle/oradata/DBdb/redo03.log'

ORA-27037:??
日常出现错误，提示不能获得该文件状态，数据无法进行日志切换

解决办法：
1、注意不需要重启数据库，只需要把日志清除即可。
SQL> alter databaseclear unarchived logfile group 3;

Database altered.

SQL> SQL>

SQL> !ls /u01/app/oracle/oradata/DBdb/redo*

/u01/app/oracle/oradata/DBdb/redo01.log /u01/app/oracle/oradata/DBdb/redo02.log /u01/app/oracle/oradata/DBdb/redo03.log

SQL> select member from v$logfile;

MEMBER

----------------------------------------------------------------

/u01/app/oracle/oradata/DBdb/redo03.log

/u01/app/oracle/oradata/DBdb/redo02.log

/u01/app/oracle/oradata/DBdb/redo01.log

1.2归档模式，不是当前正在日志损坏，数据库关闭模式。

演示过程：

--先检查日志状态：

SQL> select * from v$log;

   GROUP#   THREAD# SEQUENCE#     BYTES BLOCKSIZE   MEMBERS ARC STATUS    FIRST_CHANGE# FIRST_TIME  NEXT_CHANGE# NEXT_TIME

---------- ---------- ---------- ---------- ---------- ---------- --- ---------- ------------- ------------ ------------ ------------

        1         1       961  52428800       512         1 YES INACTIVE        4075623 25-JAN-18        4075626 25-JAN-18

        2         1       962  52428800       512         1 NO CURRENT         4075626 25-JAN-18     2.8147E+14

        3         1       960  52428800       512         1 YES INACTIVE        4075620 25-JAN-18        4075623 25-JAN-18

SQL> select member from v$logfile;

MEMBER

---------------------------------------------------------

/u01/app/oracle/oradata/DBdb/redo03.log

/u01/app/oracle/oradata/DBdb/redo02.log

/u01/app/oracle/oradata/DBdb/redo01.log

SQL> !ls /u01/app/oracle/oradata/DBdb/redo*

/u01/app/oracle/oradata/DBdb/redo01.log /u01/app/oracle/oradata/DBdb/redo02.log /u01/app/oracle/oradata/DBdb/redo03.log

--关闭数据库

SQL> shutdown immediate;

Database closed.

Database dismounted.

ORACLE instance shut down.

SQL>

--删除日志

SQL> !rm -rf /u01/app/oracle/oradata/DBdb/redo01.log

SQL>

重启数据库：

SQL> startup

ORACLE instance started.

Total System Global Area 835104768 bytes

Fixed Size                 2257840 bytes

Variable Size            549456976 bytes

Database Buffers         281018368 bytes

Redo Buffers               2371584 bytes

Database mounted.

ORA-03113: end-of-file on communication channel

Process ID: 14178

Session ID: 1 Serial number: 5

SQL>

报错，检查日志，如下：

Errors in file /u01/app/oracle/diag/rdbms/dbdb/DBdb/trace/DBdb_lgwr_14158.trc:

ORA-00313: ??????? 1 (???? 1) ???

ORA-00312: ???? 1 ?? 1: '/u01/app/oracle/oradata/DBdb/redo01.log'

ORA-27037: ????????

Linux-x86_64 Error: 2: No such file or directory

Additional information: 3

解决：在数据库启动的时候清除日志，然后open数据库：

SQL> conn / as sysdba

Connected to an idle instance.

SQL> startup mount;

ORACLE instance started.

Total System Global Area 835104768 bytes

Fixed Size                 2257840 bytes

Variable Size            549456976 bytes

Database Buffers         281018368 bytes

Redo Buffers               2371584 bytes

Database mounted.

SQL>

SQL> alter database clear logfile group 1;   

Database altered.

SQL> alter database open;

Database altered.

SQL>

SQL> select * from v$log;

   GROUP#   THREAD# SEQUENCE#     BYTES BLOCKSIZE   MEMBERS ARC STATUS    FIRST_CHANGE# FIRST_TIME  NEXT_CHANGE# NEXT_TIME

---------- ---------- ---------- ---------- ---------- ---------- --- ---------- ------------- ------------ ------------ ------------

        1         1         0  52428800       512         1 YES UNUSED          4075623 25-JAN-18        4075626 25-JAN-18

        2         1       962  52428800       512         1 NO CURRENT         4075626 25-JAN-18     2.8147E+14

        3         1       960  52428800       512         1 YES INACTIVE        4075620 25-JAN-18        4075623 25-JAN-18

SQL> select member from v$logfile;

MEMBER

--------------------------------------------------------

/u01/app/oracle/oradata/DBdb/redo03.log

/u01/app/oracle/oradata/DBdb/redo02.log

/u01/app/oracle/oradata/DBdb/redo01.log

SQL> !ls /u01/app/oracle/oradata/DBdb/redo*

/u01/app/oracle/oradata/DBdb/redo01.log /u01/app/oracle/oradata/DBdb/redo02.log /u01/app/oracle/oradata/DBdb/redo03.log

SQL>

注意，如果删除的日志未归档则加一个参数alter database clear(unarchived) logfile group 1;   

1.3数据库打开模式，非归档模式，非当前日志损坏

SQL> shutdown immediate;

Database closed.

Database dismounted.

ORACLE instance shut down.

SQL>

SQL> startup mount;

ORACLE instance started.

Total System Global Area 835104768 bytes

Fixed Size                 2257840 bytes

Variable Size            549456976 bytes

Database Buffers         281018368 bytes

Redo Buffers               2371584 bytes

Database mounted.

SQL>

SQL> alter database noarchivelog;

Database altered.

SQL> alter database open;

Database altered.

SQL>

--查询：

SQL> select * from v$log;

   GROUP#   THREAD# SEQUENCE#     BYTES BLOCKSIZE   MEMBERS ARC STATUS    FIRST_CHANGE# FIRST_TIME  NEXT_CHANGE# NEXT_TIME

---------- ---------- ---------- ---------- ---------- ---------- --- ---------- ------------- ------------ ------------ ------------

        1         1         0  52428800       512         1 YES UNUSED          4075623 25-JAN-18        4075626 25-JAN-18

        2         1       962  52428800       512         1 NO CURRENT         4075626 25-JAN-18     2.8147E+14

        3         1       960  52428800       512         1 YES INACTIVE        4075620 25-JAN-18        4075623 25-JAN-18

SQL> select member from v$logfile;

MEMBER

----------------------------------------------------------------------------------

/u01/app/oracle/oradata/DBdb/redo03.log

/u01/app/oracle/oradata/DBdb/redo02.log

/u01/app/oracle/oradata/DBdb/redo01.log

SQL> !ls /u01/app/oracle/oradata/DBdb/redo*

/u01/app/oracle/oradata/DBdb/redo01.log /u01/app/oracle/oradata/DBdb/redo02.log /u01/app/oracle/oradata/DBdb/redo03.log

SQL>

--删除日志，模拟故障：

SQL> !rm -rf /u01/app/oracle/oradata/DBdb/redo03.log

--切换日志：

SQL> alter system switch logfile;

System altered.

SQL> alter system switch logfile;

System altered.

SQL> /

System altered.

SQL> /

System altered.

注意：

在执行dml语句，以及切换日志都成功，数据库日志也没有报错如下：

SQL> shutdown immediate;

Database closed.

Database dismounted.

ORACLE instance shut down.

SQL>

SQL>

SQL> startup 

ORACLE instance started.

Total System Global Area 835104768 bytes

Fixed Size                 2257840 bytes

Variable Size            549456976 bytes

Database Buffers         281018368 bytes

Redo Buffers               2371584 bytes

Database mounted.

ORA-03113: end-of-file on communication channel

Process ID: 14645

Session ID: 1 Serial number: 5

日志信息如下：

Thu Jan 25 05:18:19 2018

Thread 1 advanced to log sequence 995 (LGWR switch)

 Current log# 2 seq# 995 mem# 0: /u01/app/oracle/oradata/DBdb/redo02.log

Thread 1 advanced to log sequence 996 (LGWR switch)

 Current log# 1 seq# 996 mem# 0: /u01/app/oracle/oradata/DBdb/redo01.log

Thu Jan 25 05:18:30 2018

Thread 1 advanced to log sequence 997 (LGWR switch)

 Current log# 3 seq# 997 mem# 0: /u01/app/oracle/oradata/DBdb/redo03.log

 Thu Jan 25 05:19:52 2018

Thread 1 advanced to log sequence 998 (LGWR switch)

 Current log# 2 seq# 998 mem# 0: /u01/app/oracle/oradata/DBdb/redo02.log

Thread 1 advanced to log sequence 999 (LGWR switch)

 Current log# 1 seq# 999 mem# 0: /u01/app/oracle/oradata/DBdb/redo01.log

但是数据库启动后，如下：

ALTER DATABASE OPEN

Errors in file /u01/app/oracle/diag/rdbms/dbdb/DBdb/trace/DBdb_lgwr_14625.trc:

ORA-00313: ??????? 3 (???? 1) ???

ORA-00312: ???? 3 ?? 1: '/u01/app/oracle/oradata/DBdb/redo03.log'

ORA-27037: ????????

Linux-x86_64 Error: 2: No such file or directory

Additional information: 3

Errors in file /u01/app/oracle/diag/rdbms/dbdb/DBdb/trace/DBdb_lgwr_14625.trc:

解决：只需要把损坏的日志文件清除日志组即可。

SQL> alter database clear logfile group 3;

Database altered.

SQL> alter database open;

Database altered.

--验证：

SQL> select * from v$log;

   GROUP#   THREAD# SEQUENCE#     BYTES BLOCKSIZE   MEMBERS ARC STATUS    FIRST_CHANGE# FIRST_TIME  NEXT_CHANGE# NEXT_TIME

---------- ---------- ---------- ---------- ---------- ---------- --- ---------- ------------- ------------ ------------ ------------

        1         1       999  52428800       512         1 NO CURRENT         4077012 25-JAN-18     2.8147E+14

        2         1       998  52428800       512         1 NO INACTIVE        4077009 25-JAN-18        4077012 25-JAN-18

        3         1         0  52428800       512         1 NO UNUSED          4076978 25-JAN-18        4077009 25-JAN-18

SQL> select member from v$logfile;

MEMBER

--------------------------------------------------------------------

/u01/app/oracle/oradata/DBdb/redo03.log

/u01/app/oracle/oradata/DBdb/redo02.log

/u01/app/oracle/oradata/DBdb/redo01.log

SQL> !ls /u01/app/oracle/oradata/DBdb/redo*

/u01/app/oracle/oradata/DBdb/redo01.log /u01/app/oracle/oradata/DBdb/redo02.log /u01/app/oracle/oradata/DBdb/redo03.log

SQL>

1.4非归档模式、数据库关闭、不是正在使用的日志文件损坏

SQL> select * from v$log;

   GROUP#   THREAD# SEQUENCE#     BYTES BLOCKSIZE   MEMBERS ARC STATUS    FIRST_CHANGE# FIRST_TIME  NEXT_CHANGE# NEXT_TIME

---------- ---------- ---------- ---------- ---------- ---------- --- ---------- ------------- ------------ ------------ ------------

        1         1      1002  52428800       512         1 NO CURRENT         4077582 25-JAN-18     2.8147E+14

        2         1      1001  52428800       512         1 NO INACTIVE        4077579 25-JAN-18        4077582 25-JAN-18

        3         1      1000  52428800       512         1 NO INACTIVE        4077575 25-JAN-18        4077579 25-JAN-18

SQL> select member from v$logfile;

MEMBER

--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

/u01/app/oracle/oradata/DBdb/redo03.log

/u01/app/oracle/oradata/DBdb/redo02.log

/u01/app/oracle/oradata/DBdb/redo01.log

SQL> !ls /u01/app/oracle/oradata/DBdb/redo*

/u01/app/oracle/oradata/DBdb/redo01.log /u01/app/oracle/oradata/DBdb/redo02.log /u01/app/oracle/oradata/DBdb/redo03.log

SQL> shutdown immediate;

Database closed.

Database dismounted.

ORACLE instance shut down.

SQL>

SQL> !rm -rf /u01/app/oracle/oradata/DBdb/redo02.log

SQL>

--删除日志，模拟故障

SQL> !ls /u01/app/oracle/oradata/DBdb/redo*

/u01/app/oracle/oradata/DBdb/redo01.log /u01/app/oracle/oradata/DBdb/redo03.log

SQL>

--重启：

SQL> startup

ORACLE instance started.

Total System Global Area 835104768 bytes

Fixed Size                 2257840 bytes

Variable Size            549456976 bytes

Database Buffers         281018368 bytes

Redo Buffers               2371584 bytes

Database mounted.

ORA-03113: end-of-file on communication channel

Process ID: 14823

Session ID: 1 Serial number: 5

SQL>

日志报错：

ALTER DATABASE OPEN

Errors in file /u01/app/oracle/diag/rdbms/dbdb/DBdb/trace/DBdb_lgwr_14803.trc:

ORA-00313: ??????? 2 (???? 1) ???

ORA-00312: ???? 2 ?? 1: '/u01/app/oracle/oradata/DBdb/redo02.log'

ORA-27037: ????????

Linux-x86_64 Error: 2: No such file or directory

解决方案：clear日志组2

SQL> conn / as sysdba

Connected to an idle instance.

SQL> startup mount;

ORACLE instance started.

Total System Global Area 835104768 bytes

Fixed Size                 2257840 bytes

Variable Size            549456976 bytes

Database Buffers         281018368 bytes

Redo Buffers               2371584 bytes

Database mounted.

SQL>

SQL> alter database clear logfile group 2;

Database altered.

SQL> alter database open;

Database altered.

SQL>

--验证：

SQL> select * from v$log;

   GROUP#   THREAD# SEQUENCE#     BYTES BLOCKSIZE   MEMBERS ARC STATUS    FIRST_CHANGE# FIRST_TIME  NEXT_CHANGE# NEXT_TIME

---------- ---------- ---------- ---------- ---------- ---------- --- ---------- ------------- ------------ ------------ ------------

        1         1      1002  52428800       512         1 NO CURRENT         4077582 25-JAN-18     2.8147E+14

        2         1         0  52428800       512         1 NO UNUSED          4077579 25-JAN-18        4077582 25-JAN-18

        3         1      1000  52428800       512         1 NO INACTIVE        4077575 25-JAN-18        4077579 25-JAN-18

SQL> select member from v$logfile;

MEMBER

------------------------------------------------------------------------

/u01/app/oracle/oradata/DBdb/redo03.log

/u01/app/oracle/oradata/DBdb/redo02.log

/u01/app/oracle/oradata/DBdb/redo01.log

SQL> !ls /u01/app/oracle/oradata/DBdb/redo*

/u01/app/oracle/oradata/DBdb/redo01.log /u01/app/oracle/oradata/DBdb/redo02.log /u01/app/oracle/oradata/DBdb/redo03.log

SQL>

总结，对于不是当前使用的归档日志损坏，归档模式需要使用alter database clear unarchived命令清空日志 组即可。对于非归档模式需要使用alter system clear日志文件组即可。

二、当前正在使用的redo log损坏

2.1归档模式，数据库open状态、当前正在使用的日志文件损坏

SQL> shutdown immediate;

Database closed.

Database dismounted.

ORACLE instance shut down.

SQL>    

SQL> startup mount;

ORACLE instance started.

Total System Global Area 835104768 bytes

Fixed Size                 2257840 bytes

Variable Size            549456976 bytes

Database Buffers         281018368 bytes

Redo Buffers               2371584 bytes

Database mounted.

SQL>

SQL> alter database archivelog;

Database altered.

SQL> alter database open;

Database altered.

--检查：

SQL> select * from v$log;

   GROUP#   THREAD# SEQUENCE#     BYTES BLOCKSIZE   MEMBERS ARC STATUS    FIRST_CHANGE# FIRST_TIME  NEXT_CHANGE# NEXT_TIME

---------- ---------- ---------- ---------- ---------- ---------- --- ---------- ------------- ------------ ------------ ------------

        1         1      1002  52428800       512         1 NO CURRENT         4077582 25-JAN-18     2.8147E+14

        2         1         0  52428800       512         1 YES UNUSED          4077579 25-JAN-18        4077582 25-JAN-18

        3         1      1000  52428800       512         1 YES INACTIVE        4077575 25-JAN-18        4077579 25-JAN-18

SQL> select member from v$logfile;

MEMBER

-------------------------------------------------------------------------

/u01/app/oracle/oradata/DBdb/redo03.log

/u01/app/oracle/oradata/DBdb/redo02.log

/u01/app/oracle/oradata/DBdb/redo01.log

SQL> !ls /u01/app/oracle/oradata/DBdb/redo*

/u01/app/oracle/oradata/DBdb/redo01.log /u01/app/oracle/oradata/DBdb/redo02.log /u01/app/oracle/oradata/DBdb/redo03.log

--触发检查点

SQL> alter system checkpoint;

System altered.

--切换日志组

SQL> alter system switch logfile;

System altered.

SQL> /

System altered.

后台日志报错，如下：

Thu Jan 25 05:41:44 2018

Errors in file /u01/app/oracle/diag/rdbms/dbdb/DBdb/trace/DBdb_arc2_15008.trc:

ORA-00313: ( 1)?

ORA-00312: 1 1: '/u01/app/oracle/oradata/DBdb/redo01.log'

ORA-27037:??

Linux-x86_64 Error: 2: No such file or directory

Additional information: 3

Master archival failure: 313

ARCH: Archival stopped, error occurred. Will continue retrying

ORACLE Instance DBdb - Archival Error

ORA-00313: ( 1)?

ORA-00312: 1 1: '/u01/app/oracle/oradata/DBdb/redo01.log'

ORA-27037:??

Linux-x86_64 Error: 2: No such file or directory

解决：由于这个时候，虽然当前日志是正在被使用的，但是我们可以先进行切换日志之后，然后执行clear操作。

SQL> select * from v$log;

   GROUP#   THREAD# SEQUENCE#     BYTES BLOCKSIZE   MEMBERS ARC STATUS    FIRST_CHANGE# FIRST_TIME  NEXT_CHANGE# NEXT_TIME

---------- ---------- ---------- ---------- ---------- ---------- --- ---------- ------------- ------------ ------------ ------------

        1         1      1002  52428800       512         1 NO INACTIVE        4077582 25-JAN-18        4078722 25-JAN-18

        2         1      1003  52428800       512         1 NO INACTIVE        4078722 25-JAN-18        4078725 25-JAN-18

        3         1      1004  52428800       512         1 NO CURRENT         4078725 25-JAN-18     2.8147E+14

SQL> alter databaseclear unarchived logfile group 1;

Database altered.

--验证：

SQL> select * from v$log;

   GROUP#   THREAD# SEQUENCE#     BYTES BLOCKSIZE   MEMBERS ARC STATUS    FIRST_CHANGE# FIRST_TIME  NEXT_CHANGE# NEXT_TIME

---------- ---------- ---------- ---------- ---------- ---------- --- ---------- ------------- ------------ ------------ ------------

        1         1      1005  52428800       512         1 NO CURRENT         4078821 25-JAN-18     2.8147E+14

        2         1      1003  52428800       512         1 YES INACTIVE        4078722 25-JAN-18        4078725 25-JAN-18

        3         1      1004  52428800       512         1 YES ACTIVE          4078725 25-JAN-18        4078821 25-JAN-18

SQL> select member from v$logfile;

MEMBER

----------------------------------------------------------------------

/u01/app/oracle/oradata/DBdb/redo03.log

/u01/app/oracle/oradata/DBdb/redo02.log

/u01/app/oracle/oradata/DBdb/redo01.log

SQL> !ls /u01/app/oracle/oradata/DBdb/redo*

/u01/app/oracle/oradata/DBdb/redo01.log /u01/app/oracle/oradata/DBdb/redo02.log /u01/app/oracle/oradata/DBdb/redo03.log

SQL>

2.2归档模式，数据库open状态、当前正在使用的日志文件损坏，并且正常关闭数据库

--查询：

SQL> select * from v$log;

   GROUP#   THREAD# SEQUENCE#     BYTES BLOCKSIZE   MEMBERS ARC STATUS    FIRST_CHANGE# FIRST_TIME  NEXT_CHANGE# NEXT_TIME

---------- ---------- ---------- ---------- ---------- ---------- --- ---------- ------------- ------------ ------------ ------------

        1         1      1005  52428800       512         1 YES ACTIVE          4078821 25-JAN-18        4078866 25-JAN-18

        2         1      1006  52428800       512         1 NO CURRENT         4078866 25-JAN-18     2.8147E+14

        3         1      1004  52428800       512         1 YES ACTIVE          4078725 25-JAN-18        4078821 25-JAN-18

SQL> select member from v$logfile;

MEMBER

-----------------------------------------------------------------------------

/u01/app/oracle/oradata/DBdb/redo03.log

/u01/app/oracle/oradata/DBdb/redo02.log

/u01/app/oracle/oradata/DBdb/redo01.log

SQL> !ls /u01/app/oracle/oradata/DBdb/redo*

/u01/app/oracle/oradata/DBdb/redo01.log /u01/app/oracle/oradata/DBdb/redo02.log /u01/app/oracle/oradata/DBdb/redo03.log

SQL>

--删除日志组2，模拟故障：

SQL> !rm -rf /u01/app/oracle/oradata/DBdb/redo02.log

SQL> !ls /u01/app/oracle/oradata/DBdb/redo*

/u01/app/oracle/oradata/DBdb/redo01.log /u01/app/oracle/oradata/DBdb/redo03.log

--关闭数据库，重启：

SQL> shutdown immediate;

Database closed.

Database dismounted.

ORACLE instance shut down.

SQL>

SQL> startup

ORACLE instance started.

Total System Global Area 835104768 bytes

Fixed Size                 2257840 bytes

Variable Size            549456976 bytes

Database Buffers         281018368 bytes

Redo Buffers               2371584 bytes

Database mounted.

ORA-03113: end-of-file on communication channel

Process ID: 15253

Session ID: 1 Serial number: 5

日志报错，信息如下：

ALTER DATABASE OPEN

LGWR: STARTING ARCH PROCESSES

Thu Jan 25 05:50:23 2018

ARC0 started with pid=20, OS id=15255

ARC0: Archival started

LGWR: STARTING ARCH PROCESSES COMPLETE

ARC0: STARTING ARCH PROCESSES

Errors in file /u01/app/oracle/diag/rdbms/dbdb/DBdb/trace/DBdb_lgwr_15233.trc: