t8y2/dbx · error · IllegalStateException

Informix metadata owner is unavailable for an unqualified re

Error message

Informix metadata owner is unavailable for an unqualified request

What it means

InformixAgent.metadataOwner resolves the owner/schema used to qualify metadata lookups. When no explicit owner was supplied and the login-derived owner normalizes to an empty string, the agent cannot build an unqualified metadata request, so it throws IllegalStateException.

Source

Thrown at agents/drivers/informix/src/main/java/com/dbx/agent/informix/InformixAgent.java:563

        args.add(owner);
    }

    private void appendRoutineOwnerPredicate(StringBuilder sql, List<Object> args, String schema) {
        String owner = metadataOwner(schema);
        sql.append(" AND owner = ?");
        args.add(owner);
    }

    private String metadataOwner(String schema) {
        String owner = normalizeOwner(schema);
        if (!owner.isEmpty()) {
            return owner;
        }
        owner = normalizeOwner(loginOwner);
        if (!owner.isEmpty()) {
            return owner;
        }
        throw new IllegalStateException("Informix metadata owner is unavailable for an unqualified request");
    }

    private static String normalizeOwner(String schema) {
        return schema == null ? "" : schema.trim();
    }

    private static void appendInformixTableTypePredicate(StringBuilder sql, MetadataListConstraints constraints) {
        if (!constraints.hasObjectTypes()) {
            return;
        }
        List<String> types = new ArrayList<>();
        if (constraints.tableTypeAllowed("TABLE")) {
            types.add("'T'");
        }
        if (constraints.tableTypeAllowed("VIEW")) {
            types.add("'V'");
        }
        if (types.isEmpty()) {

View on GitHub (pinned to c0390bff16)

Solutions

Pass an explicit owner/schema qualifier in the metadata request or connection params
Connect as a user whose default owner Informix can report (check the login user's default schema)
Pre-qualify object names (owner.table) in the query so the owner resolution path is not needed

Example fix

// before
Map.of("method", "metadata_tables")  // no owner
// after
Map.of("method", "metadata_tables", "owner", "informix");

Defensive patterns

Strategy: validation

Validate before calling

if (params.get("owner") == null || params.get("owner").isBlank()) {
    params.put("owner", resolveDefaultOwnerOr("informix"));
}

Try / catch

try {
    return agent.metadata(request);
} catch (IllegalStateException e) {
    if (e.getMessage().contains("metadata owner is unavailable")) {
        request.put("owner", explicitOwner); // retry with explicit owner
    }
    throw e;
}

Prevention

Always supply an explicit owner/schema for metadata requests
Connect with accounts that have a resolvable default owner
Validate required metadata parameters client-side before dispatch

When it happens

Trigger: Requesting metadata (tables/columns for an owner) with no owner qualifier in params and metadataOwner/loginOwner returning null/blank.

Common situations: Connecting with an account that has no resolvable default owner/schema; metadata API called without a schema/owner parameter; driver returned empty current schema.

Understand the failure class

Background: Missing required parameter errors: what 'X is required' and 'the required X param is missing' mean, and how to fix them — this error's family across 27 libraries.

Related errors

AI-assisted analysis of t8y2/dbx@c0390bff16 (2026-09-05). Data as JSON: /api/errors/46ad820cfbe6d3c8. Report an issue: GitHub.