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

【问题】ORA-03113: end-of-file on communication channel  导致数据库无法启动

1、先查询启动log报错信息

   cd  $ORACLE_BASE/diag/rdbms/数据库实例名/数据库实例名/trace

   查看tail -f -n 1000 alert_数据库实例名.log

   错误信息：
 
   Errors in file /fantlam/oracle/app/diag/rdbms/workway/workway/trace/workway_m000_6586.trc:
ORA-00313: open failed for members of log group 2 of thread 1
ORA-00312: online log 2 thread 1: '/fantlam/oracle/app/oradata/workway/redo02.log'
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3
Errors in file /fantlam/oracle/app/diag/rdbms/workway/workway/trace/workway_m000_6586.trc:
ORA-00313: open failed for members of log group 3 of thread 1
ORA-00312: online log 3 thread 1: '/fantlam/oracle/app/oradata/workway/redo03.log'
ORA-27037: unable to obtain file status

【解决】删除redo02.log和redo03.log

2、清除错误归档

   sqlplus sys/123456 as sysdba

   --启动数据库到mount状态
   startup mount;

   --查询归档错误
   select group#,archived,status from v$log;

    GROUP#  SEQUENCE# ARCHIVED    STATUS
---------- ---------- --------- ------------------------------------------------
     1     241 NO    CURRENT
     3     243 NO    INACTIVE
     2     242 NO    INACTIVE

    --清除归档group 3 和group 2

   alter database clear unarchived logfile group 2;
  
   alter database clear unarchived logfile group 3;

   --打开数据库，成功启动
   alter database open;