Another possible reason why Oracle is not connected to the Ora-12162:tns:net service name is incorrectly specified

Using Sqlplus to connect Oracle database times wrong:

[Email protected] ~]# sqlplus oracle/[email PROTECTED]//10.5.0.7:1521/SSP

Sql*plus:release 11.1.0.7.0-production on Thu June 26 10:16:21 2014

Copyright (c) 1982, the Oracle. All rights reserved.

ERROR:

Ora-12528:tns:listener:all appropriate instances is blocking new connections

Enter User-name:

Error when using Oracle Java Client Connection:

caused by:oracle.net.ns.NetException:End of TNS data channel

At Oracle.net.ns.NetInputStream.getNextPacket (netinputstream.java:165)

At Oracle.net.ns.NetInputStream.read (netinputstream.java:117)

At Oracle.net.ns.NetInputStream.read (netinputstream.java:92)

At Oracle.net.ns.NetInputStream.read (netinputstream.java:77)

At Oracle.jdbc.driver.T4CMAREngine.unmarshalUB1 (t4cmarengine.java:1034)

At Oracle.jdbc.driver.T4CMAREngine.unmarshalSB1 (t4cmarengine.java:1010)

At Oracle.jdbc.driver.T4C8TTIdty.receive (t4c8ttidty.java:516)

At Oracle.jdbc.driver.T4CConnection.logon (t4cconnection.java:332)

... Ten more

Using Netstat-an | grep:1521 Check the time to find that the port monitoring is correct, when the client to link the state of established, but instantly became the TIME_WAIT state.

The client and Oracle server IP are also available and ping is not a problem.

Oracle servers and clients are in different two networks, and Oracle and network machines can connect to the database properly.

Finally found that the client and Oracle Server MTU settings are not the same result. Change it to the same.

You must ensure that the MTU is consistent across network access and that communication is normal.

This article is from the "small Hebebe Technology Space" blog, please be sure to keep this source http://babyhe.blog.51cto.com/1104064/1431069