Cannot Establish Connection (Error Code: 17002) Randomly With JDBC Thin Driver
(Doc ID 357445.1)
Last updated on FEBRUARY 10, 2022
Applies to:JDBC - Version 10.2.0.1 and later
Information in this document applies to any platform.
When using the ORACLE JDBC thin driver to access a database server instance, it fails with the following Exception:
java.sql.SQLException: Io exception: The Network Adapter could not establish the connection
This happens when looping on the following sequence :
- connect to the database server (DriverManager.getConnection() method)
- close JDBC connection
After executing N times (randomly) this sequence of code fails at connection time.
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