應用一直好好的，突然有一天，日志中開始時不時的出現ora-03135，奇了怪。查了一下——

bash-2.05$ oerr ora 3135
03135, 00000, "connection lost contact"
// *Cause: 1) Server unexpectedly terminated or was forced to terminate.
//????????? 2) Server timed out the connection.
// *Action: 1) Check if the server session was terminated.
//????????? 2) Check if the timeout parameters are set properly in sqlnet.ora.

在$ORACLE_HOME/network/admin/sample/sqlnet.ora中找了一下有這一小節——

########################
#sqlnet.expire_time = 10
########################
#
#Possible values: 0-any valid positive integer! (in minutes)
#Default: 0 minutes?
#Recommended value: 10 minutes
#
#Purpose: Indicates the time interval to send a probe to verify the?
#???????? client session is alive (this is used to reclaim watseful?
#???????? resources on a dead client)
#
#Supported since: v2.1

于是，在sqlnet.ora中加入

sqlnet.expire_time = 10

重啟listener

bash-2.05$ lsnrctl reload

……
The command completed successfully

觀察兩天，日志中未再報ora-03135錯誤了。

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