Informix Error -9457: Cannot convert large object handle to byte[].

Reasons / Common Causes

-9457 fires when the database server can't obtain a large object's content over a JDBC connection — per the official guidance.

1. The JDBC connection the large object came from no longer being valid, per the official guidance — the direct, only cause.

Solutions / Resolution

1. Make sure the connection from which the large object comes is still valid, per the official guidance.

Examples

N/A

No specific triggering statement is documented beyond an invalidated JDBC connection.

Diagnostic Checks

1. Check whether the originating JDBC connection is still open/valid, and reacquire the large object over a valid connection if not.

Related Errors / Related Topics

• -9455 — "Cannot access large object." A related large-object-access error, on a missing default sbspace rather than connection validity.
• -9456 — "Cannot get large object length." A related large-object-access error, on length retrieval rather than content retrieval.
• -9458 — "Cannot start large object search." A related large-object-access error, on seek rather than content retrieval.
• -9459 — "Large object Error: (%s)." The general large-object-access error this is a specific case of, on content retrieval.

The large object's content couldn't be retrieved as a byte array — check whether the originating JDBC connection is still valid.