ORA-16198: LGWR received timedout error from KSR
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ORA-16198: LGWR received timedout error from KSR ------- 1
LGWR: Attempting destination LOG_ARCHIVE_DEST_2 network reconnect (16198) --------2
LGWR: Destination LOG_ARCHIVE_DEST_2 network reconnect abandoned
Error 16198 for archive log file 9 to 'q9histstd'
Destination LOG_ARCHIVE_DEST_2 is UNSYNCHRONIZED
Destination LOG_ARCHIVE_DEST_2 no longer supports SYNCHRONIZATION
LGWR: Failed to archive log 9 thread 1 sequence 50218 (16198)
Thread 1 advanced to log sequence 50218 (LGWR switch) --------3
Current log# 9 seq# 50218 mem# 0: /oradata/q9histdb/group_9.1546.818724549
Tue Nov 04 23:06:14 2014
Archived Log entry 97790 added for thread 1 sequence 50217 ID 0x35fb63c9 dest 1:
Tue Nov 04 23:10:13 2014
Destination LOG_ARCHIVE_DEST_2 is UNSYNCHRONIZED
Thread 1 advanced to log sequence 50219 (LGWR switch)
Current log# 10 seq# 50219 mem# 0: /oradata/q9histdb/group_10.1545.818724547
Tue Nov 04 23:10:27 2014
Archived Log entry 97791 added for thread 1 sequence 50218 ID 0x35fb63c9 dest 1:
Tue Nov 04 23:11:03 2014
ARC6: Standby redo logfile selected for thread 1 sequence 50218 for destination LOG_ARCHIVE_DEST_2 ------4
Tue Nov 04 23:11:04 2014
NSS2 started with pid=63, OS id=21261
Tue Nov 04 23:11:11 2014
LGWR: Standby redo logfile selected for thread 1 sequence 50220 for destination LOG_ARCHIVE_DEST_2
Thread 1 advanced to log sequence 50220 (LGWR switch)
上面是生产环境中主库的一段日志,该段日志证实了最近自己看的一本书--(Oracle Data Guard 11g完全参考手册Oracle Data Guard 11g完全参考手册)中理论知识。
下面参数文件中对于日志传输的配置:
*.log_archive_dest_2='SERVICE=****** lgwr sync valid_for=(online_logfile,primary_role) db_unique_name=******'(为了信息保密,将数据库名字掩盖了)
采用的是同步传输,我们按告警日志中标示示的步骤来解析
1、收不到备库的确认消息,传输连接断开
2、重连备库失败
3、由于重连失败,只好进行日志切换
4、ARCH使用ping的形式尝试重建连接,连接成功,将归档传输到备库。
引起这问题的可能原因有很多,建议将net_timeout设置为默认值(30s),由于后面重建了连接,后续关注该问题。
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