Informix Error -9442

-9442 Error loading Java UDR class (%s).

Make the following checks to ensure that the class that contains the Java UDR is loaded: o The directory that contains the class must be specified in the CLASSPATH environment variable.

o The jar that contains the class must be correctly installed with the built-in procedure install_jar().

o The jar file has been created correctly, with the proper path to the class.

Oninit® Troubleshooting Guidance

Reasons / Common Causes

-9442 fires when the class containing a Java UDR can't be loaded — per the official guidance.

The class's directory missing from the CLASSPATH environment variable, per the official guidance — the first named cause.
The jar containing the class not correctly installed with install_jar(), per the official guidance — the second named cause.
The jar file not created correctly, with the wrong path to the class, per the official guidance — the third named cause.

Solutions / Resolution

Check that the class's directory is in CLASSPATH, per the official guidance.
Check that the jar was correctly installed with the install_jar() built-in procedure, per the official guidance.
Check that the jar file's path to the class is correct, per the official guidance.

Examples

Installing a jar containing a Java UDR class

EXECUTE FUNCTION install_jar('file:/path/to/myudr.jar', 'MyUDRJar', 0);

Diagnostic Checks

Check CLASSPATH, the jar's install_jar() registration, and the jar's internal class path, and correct whichever is wrong.

Related Errors / Related Topics

-9443 — "Cannot find class for type (%s)." A related Java-class-loading error, for UDT type mappings rather than a UDR's implementing class.
-9449 — "Java UDR method not found or is not static: (%s)." A related Java-UDR registration error, on the method within the class rather than loading the class itself.

The class containing a Java UDR couldn't be loaded — check CLASSPATH, the jar's install_jar() registration, and the jar's internal class path.