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Error "java.sql.SQLException:io Exception:The Network Adapter Could Not Establish Connection" (Doc ID 557411.1)

Last updated on JUNE 01, 2018

Applies to:

JDBC - Version 10.2.0.3 and later
Oracle Net Services - Version 12.1.0.2 to 12.1.0.2 [Release 12.1]
Information in this document applies to any platform.
***Checked for relevance on 20-Mar-2014***



Symptoms

Connecting to the database with JDBC thin driver, the following error is reported:

java.sql.SQLException: Io exception: The Network Adapter could not establish the connection at
oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:111) at
oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:145) at
oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:254) at
oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:386) at
oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:413) at
oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:164)


Cause

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