在XTTS迁移测试阶段，遇到执行几个expdp的导出任务，迟迟没有返回任何信息，对应日志无任何输出。
环境：
AIX 6.1 + Oracle 10.2.0.4
现象：
在XTTS迁移测试阶段，遇到执行几个expdp的导出任务，迟迟没有返回任何信息，对应日志无任何输出，查看任务状态：
SQL> set lines 300col OWNER_NAME for a10col OPERATION for a15col JOB_MODE for a20col STATE for a15select * from dba_datapump_jobs; OWNER_NAME JOB_NAME OPERATION JOB_MODE STATE DEGREE ATTACHED_SESSIONS DATAPUMP_SESSIONS---------- ------------------------------ --------------- -------------------- --------------- ---------- ----------------- -----------------SYS SYS_EXPORT_TRANSPORTABLE_01 EXPORT TRANSPORTABLE DEFINING 1 0 1SYS SYS_EXPORT_TRANSPORTABLE_02 EXPORT TRANSPORTABLE DEFINING 1 1 2SYS SYS_EXPORT_TRANSPORTABLE_03 EXPORT TRANSPORTABLE DEFINING 1 1 2SYS SYS_EXPORT_SCHEMA_01 EXPORT SCHEMA DEFINING 1 1 2SYS SYS_EXPORT_TRANSPORTABLE_04 EXPORT TRANSPORTABLE DEFINING 1 1 2SYS SYS_EXPORT_SCHEMA_02 EXPORT SCHEMA DEFINING 1 1 26 rows selected.可以看到所有的expdp导出任务的STATE都停留在DEFINING状态。
- 1.牛刀小试清异常
- 2.追本溯源查MOS
1.牛刀小试清异常
先强制杀掉后台执行的所有expdp任务：
ps -ef|grep expdp|grep -v grep|awk '{print $2}'|xargs kill -9然后尝试删除这些表(其实应该在not running状态下删除)
select 'drop table '||OWNER_NAME||'.'||JOB_NAME||' purge;' from dba_datapump_jobs where STATE='NOT RUNNING';drop table sys.SYS_EXPORT_TRANSPORTABLE_01 purge;..可这样是没有作用的，查询结果不变。
甚至尝试正常shutdown immediate停止数据库，也无法成功，告警日志看到有活动调用：
Thu Nov 1 15:14:24 2018Active call for process 4522064 user 'oracle' program 'oracle@localhost (DM00)'Active call for process 4456536 user 'oracle' program 'oracle@localhost (DM01)'Active call for process 10027180 user 'oracle' program 'oracle@localhost (DM02)'Active call for process 7340140 user 'oracle' program 'oracle@localhost (DM03)'Active call for process 6291888 user 'oracle' program 'oracle@localhost (DM04)'Active call for process 8126596 user 'oracle' program 'oracle@localhost (DM05)'SHUTDOWN: waiting for active calls to complete.发现这些进程的id都对应了ora_dm的进程：
$ ps -ef|grep ora_dm oracle 4456536 1 0 17:00:09 - 0:00 ora_dm01_xxxxdb oracle 4522064 1 0 16:50:57 - 0:00 ora_dm00_xxxxdb oracle 7340140 1 0 14:06:07 - 0:00 ora_dm03_xxxxdb oracle 8126596 1 0 14:35:03 - 0:00 ora_dm05_xxxxdb oracle 10027180 1 0 13:55:08 - 0:00 ora_dm02_xxxxdb oracle 6291888 1 0 14:31:17 - 0:00 ora_dm04_xxxxdb oracle 7340432 8388786 0 15:22:59 pts/4 0:00 grep ora_dm实际上，这就是expdp任务的相关进程，强制杀掉这些进程：
ps -ef|grep ora_dm|grep -v grep|awk '{print $2}'|xargs kill -9之后数据库关闭成功：
Thu Nov 1 15:24:37 2018All dispatchers and shared servers shutdownThu Nov 1 15:24:37 2018ALTER DATABASE CLOSE NORMAL启动数据库后，再次查询发现已经成功清理：
SQL> set lines 300col OWNER_NAME for a10col OPERATION for a15col JOB_MODE for a20col STATE for a15select * from dba_datapump_jobs; no rows selected小结：
数据泵任务与ora_dm进程相关；如果数据泵任务发生异常，但任务并没有退出的情况，需要同时杀掉这类进程(杀掉后状态就会变为NOT RUNNING)。关库不是必须的，只是演示此时正常关闭被阻塞的场景。这也能说明为什么要保证在NOT RUNNING状态下才可以清理。
2.追本溯源查MOS
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