Informix Error -9477: Cannot obtain UDR environment.

Reasons / Common Causes

-9477 fires when getUDREnv() is called from a thread other than the one executing the Java UDR — per the official guidance.

1. getUDREnv() invoked by a child thread forked by the Java UDR, per the official guidance — the direct, only cause; UDR environment objects are available only to Java UDR threads.

Solutions / Resolution

1. Make sure getUDREnv() isn't invoked by a child thread forked by the Java UDR, per the official guidance — call it directly on the UDR's own executing thread.

Examples

N/A

No specific triggering statement is documented beyond calling getUDREnv() from a forked child thread.

Diagnostic Checks

1. Check the Java UDR's code for where getUDREnv() is called, and move it onto the UDR's own executing thread if it's on a child thread.

Related Errors / Related Topics

• -9468 — "Cannot make UDR connection in non-UDR thread." The same class of wrong-thread error, for JDBC connections rather than the UDR environment object.

getUDREnv() was called from a forked child thread instead of the UDR's own thread — call it on the UDR's executing thread.