今天在检查listener.log的时候发现了一个错误:
23-MAR-2009 11:15:17 * 12502
TNS-12502: TNS:listener received no CONNECT_DATA from client
23-MAR-2009 11:17:34 * 12502
TNS-12502: TNS:listener received no CONNECT_DATA from client
23-MAR-2009 11:17:52 * 12502
TNS-12502: TNS:listener received no CONNECT_DATA from client
The error indicates that the Listener did not recieve the complete information of the connect string, it lacks the CONNECT_DATA section.
查了一下相关资料,认为有些内部连接或者一些工具的连接方式中没有包含connect_data内容,就会出现这种错误,或者说是提示警告。由于客户端没有发生任何异常连接,此问题没有频繁的出现,再此记录一下。
metalink_id:Subject: TroubleShooting Guide For ORA - 12502 TNS:listener received no CONNECT_DATA from client
Doc ID: 453505.1 Type: TROUBLESHOOTING
Modified Date : 17-NOV-2008 Status: PUBLISHED
from:

本文记录了一种在Oracle Listener日志中出现的TNS-12502错误:“listener received no CONNECT_DATA from client”。该错误表明监听器未收到完整的连接字符串信息。文中提到这种情况可能是由于某些内部连接或工具的连接方式中缺少connect_data部分导致的。
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