[Streams]因为网络问题造成信息传输延迟时

 

[可能发生的现象]

由于网络断线造成网络故障,恢复前,信息交换受到阻碍,直到重新开始传输信息为止,需要一定时间。

 

 

以下是发生这种情况时,警报日志的输出例。

 

– 源数据库     : CAPTURE01(获得进程)

-目标数据库 : APPLY011(应用进程)

 

 

源数据库           目标数据库

—————————     —————————

 

— 开始应用进程

Streams APPLY AP01 for APPLY01 started with pid=18, OS id=1048746

— 开始获得进程

Streams CAPTURE CP01 for CAPTURE01 with pid=36, OS id=1233122 is in combined capture and apply mode.

Starting persistent Logminer Session with sid = 24 for Streams Capture CAPTURE01

 

— 开始接收

Propagation Receiver (CCA) for Streams Capture CAPTURE01 and Apply APPLY01 with pid=30, OS id=348380 started.

 

********** 发生网络故障 ******

 

— 重新尝试开始获得进程

CP01: Restarting Capture CAPTURE01 due to ORA-3135 in combined capture and apply

CP01: Restarting Capture CAPTURE01 due to ORA-448 in combined capture and apply

Streams CAPTURE CP01 for CAPTURE01 started with pid=41, OS id=1253604

Streams CAPTURE CP01 for CAPTURE01 with pid=36, OS id=1233122 stopped

 

 

********** 修复网络 **********

 

— 开始获得进程

Streams CAPTURE CP01 for CAPTURE01 with pid=41, OS id=1253604 is in combined capture and apply mode.

Starting persistent Logminer Session with sid = 24 for Streams Capture CAPTURE01

 

— 开始接收信息

Propagation Receiver (CCA) for Streams Capture CAPTURE01 and Apply APPLY01 with pid=40, OS id=483474 started.

 

— 重启应用进程(终止,启动) <—– (*1)

Streams APPLY AP01 for APPLY01 with pid=18, OS id=1048746 stopped

Streams APPLY AP01 for APPLY01 started with pid=25, OS id=1003714

 

———————————–

:

这段时间的信息交换终止

:

———————————–

 

— 检测获得进程中的错误 <—– (*2)

CP01: Restarting Capture CAPTURE01 due to ORA-26804 in combined capture and apply

CP01: Restarting Capture CAPTURE01 due to ORA-448 in combined capture and apply

 

— 重启获得进程 <—– (*3)

Streams CAPTURE CP01 for CAPTURE01 started with pid=36, OS id=643324

Streams CAPTURE CP01 for CAPTURE01 with pid=41, OS id=1253604 stopped

Streams CAPTURE CP01 for CAPTURE01 with pid=36, OS id=643324 is in combined capture and apply mode.

 

— 开始接收

Propagation Receiver (CCA) for Streams Capture CAPTURE01 and Apply APPLY01 with pid=30, OS id=348394 started.

 

—————————     —————————

 

执行重启应用进程(终止、开始)后,到检测到应用进程无效化,需要一定时间。

通过获得进程检测到错误后,马上重启获得进程 (*3)。

 

 

[对象版本]

发生问题的版本  :Oracle Database 11g Release 2(11.2.0)

Oracle Database 11g Release 2(11.1.0)

修复了问题的版本 :无

预定修复问题的版本:未定

已修复问题的PSR       :无

预计修复问题的PSR     :未定

 

 

[目标平台]

所有平台

 

 

[可能发生的条件]

满足以下条件的话就可能发生。

– 获得与应用的复合 (CCA)有效

– 发生网络故障后,已修复的状态

 

 

[原因]

开发部还在研究。

根据研究情况,依次会反映在 KROWN 中

 

 

 

[发生故障时的对策]

1.直到信息交换自动重启为止一直待机。

  1. 请手动重启获得进程与应用进程

 

终止获得进程 ->终止应用进程 ->开始应用进程-> 开始获得进程

 

例)

源数据库            目标数据库

SQL> exec dbms_capture_adm.stop_capture(‘<capture_name>’);

SQL> exec dbms_apply_adm.stop_apply(‘<apply_name>’);

SQL> exec dbms_apply_adm.start_apply(‘<apply_name>’);

SQL> exec dbms_capture_adm.start_capture(‘<capture_name>’);

 

 

 

 

 


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