NL Exception was generated at oracle.net.resolver.AddrResolution.resolveAddrTree While Establishing Connection To Database (Doc ID 2245221.1)

Last updated on MARCH 17, 2017

Applies to:

JDBC - Version 11.2.0.4.0 and later
Information in this document applies to any platform.

Symptoms

While trying to establish JDBC connections to the database, the following exception is received:

java.sql.SQLRecoverableException: IO Error: NL Exception was generatedDSRA0010E: SQL State = 08006, Error Code = 17,002
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:419)
at oracle.jdbc.driver.PhysicalConnection.(PhysicalConnection.java:536)
at oracle.jdbc.driver.T4CConnection.(T4CConnection.java:228)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:521)
at oracle.jdbc.pool.OracleDataSource.getPhysicalConnection(OracleDataSource.java:280)
at oracle.jdbc.pool.OracleDataSource.getConnection(OracleDataSource.java:207)
at oracle.jdbc.pool.OracleConnectionPoolDataSource.getPhysicalConnection(OracleConnectionPoolDataSource.java:139)
at oracle.jdbc.pool.OracleConnectionPoolDataSource.getPooledConnection(OracleConnectionPoolDataSource.java:88)
...

Caused by: oracle.net.ns.NetException: NL Exception was generated
at oracle.net.resolver.AddrResolution.resolveAddrTree(AddrResolution.java:614)
at oracle.net.resolver.AddrResolution.resolveAndExecute(AddrResolution.java:411)
at oracle.net.ns.NSProtocol.establishConnection(NSProtocol.java:678)
at oracle.net.ns.NSProtocol.connect(NSProtocol.java:238)
at oracle.jdbc.driver.T4CConnection.connect(T4CConnection.java:1054)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:308)

Changes

A firewall exists between the application and the database.

Cause

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