物理standby出现ORA-03135丢失连接

环境：WINDOWS 2003 R2 SP2，ORACLE 10.2.0.3.0 

配置同机房和远端机房两台物理STANDBY，其中同机房采用LGWR传输，远端采用ARCH传输

 

现象：主服务器系统日志里间歇性报：“没有可用的归档目的地，归档失败”，但是两台STANDBY同步正常

主库ALERT日志中报 “ORA-16014：日志2的序列号XXX未归档，没有可用的目的地”，查看相应的TRACE文件，发现报ORA--3135：丢失连接错误

 

原因：通过检查，发现ALERT日志中报归档失败的都是远端归档目的地，而同机房的归档路径正常。而METALINK上对ORA-03135的描述如下：

Applies to:

Oracle Net Services - Version: 10.1.0.2.0 to 10.2.0.4.0
This problem can occur on any platform.

Symptoms

customer reported intermittently the archiver process hits error and 
following seen in the primary node alert log

Errors in file /opt/oracle/admin/ORCL/bdump/orcl1_arc4_28059.trc: 
ORA-03135: connection lost contact 
Mon Sep 22 22:24:51 2008 
FAL[server, ARC4]: FAL archive failed, see trace file. 
Mon Sep 22 22:24:51 2008 
Errors in file /opt/oracle/admin/ORCL/bdump/orcl1_arc4_28059.trc: 
ORA-16055: FAL request rejected 


.

Changes

There may be a firewall rule changed or the firewall is newly installed.

 

经确认，主库至远端库之间存在防火墙，且相互之间网络较慢，网络传输存在连接超时现象