监听故障TNS-12537: TNS:connection closed 解决对策

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一组的同事找我说，有很多应用不能连接数据库，让我去帮忙看看，一开始以为是 process 和 session 数不构，去了查了一下，发现远没到设置的数，且主机未发现有性能问题，查看等待事件，全是军空闲类的，这下我就有点朦了，后来查看监听状态，执行 lsnrctl  status 后出来两行字之后卡在那儿了，没有反应，所以 kill 掉进程后重启监听，重启后，没有服务注册时正常，过 1 分种在查看监听状态，还是卡在那儿了，查看监听日志没什么收获，后来查看数据库 alter 日志，发现如下：

Fatal NI connect error 12537, connecting to:

 (LOCAL=NO)

  VERSION INFORMATION:

TNS for Linux: Version 11.2.0.1.0 – Production

Oracle Bequeath NT Protocol Adapter for Linux: Version 11.2.0.1.0 – Production

TCP/IP NT Protocol Adapter for Linux: Version 11.2.0.1.0 – Production

  Time: 03-NOV-2014 09:44:15

  Tracing not turned on.

  Tns error struct:

    ns main err code: 12537

TNS-12537: TNS:connection closed

    ns secondary err code: 12560

    nt main err code: 0

    nt secondary err code: 0

    nt OS err code: 0

opiodr aborting process unknown ospid (3657) as a result of ORA-609

Mon Nov 03 09:44:22 2014

***********************************************************************

Fatal NI connect error 12537, connecting to:

 (LOCAL=NO)

  VERSION INFORMATION:

TNS for Linux: Version 11.2.0.1.0 – Production

Oracle Bequeath NT Protocol Adapter for Linux: Version 11.2.0.1.0 – Production

TCP/IP NT Protocol Adapter for Linux: Version 11.2.0.1.0 – Production

  Time: 03-NOV-2014 09:44:22

  Tracing not turned on.

  Tns error struct:

    ns main err code: 12537

TNS-12537: TNS:connection closed

    ns secondary err code: 12560

    nt main err code: 0

    nt secondary err code: 0

    nt OS err code: 0

opiodr aborting process unknown ospid (3666) as a result of ORA-609

Mon Nov 03 09:44:26 2014

***********************************************************************

Fatal NI connect error 12537, connecting to:

 (LOCAL=NO)

  VERSION INFORMATION:

TNS for Linux: Version 11.2.0.1.0 – Production

Oracle Bequeath NT Protocol Adapter for Linux: Version 11.2.0.1.0 – Production

TCP/IP NT Protocol Adapter for Linux: Version 11.2.0.1.0 – Production

  Time: 03-NOV-2014 09:44:26

  Tracing not turned on.

  Tns error struct:

    ns main err code: 12537

TNS-12537: TNS:connection closed

    ns secondary err code: 12560

    nt main err code: 0

    nt secondary err code: 0

    nt OS err code: 0

opiodr aborting process unknown ospid (3670) as a result of ORA-609

Mon Nov 03 09:44:27 2014

***********************************************************************

Fatal NI connect error 12537, connecting to:

 (LOCAL=NO)

  VERSION INFORMATION:

TNS for Linux: Version 11.2.0.1.0 – Production

Oracle Bequeath NT Protocol Adapter for Linux: Version 11.2.0.1.0 – Production

TCP/IP NT Protocol Adapter for Linux: Version 11.2.0.1.0 – Production

  Time: 03-NOV-2014 09:44:27

  Tracing not turned on.

  Tns error struct:

    ns main err code: 12537

TNS-12537: TNS:connection closed

    ns secondary err code: 12560

    nt main err code: 0

    nt secondary err code: 0

    nt OS err code: 0

opiodr aborting process unknown ospid (3695) as a result of ORA-609

上网查了一下，有人说是 DNS 解析问题，按照解决方法注释 DNS 的解析后工作正常，上网查了很多，没有发现具体原因。

解决方法

注释掉 /etc/resolve.conf 配置文件中对 DNS 的解析解决

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