What causes "Failed to find remote schema name: ${e.message}" in prestodb/presto?

Fix the underlying cause shown in the wrapped e.message (e.g. invalid regex, unreadable mapping)

JDBC_ERROR

JDBC_ERROR

Error message

Failed to find remote schema name: ${e.message}

What it means

toRemoteSchemaName() translates a Presto schema name to the remote database's stored identifier, optionally consulting a name-mapping file. Any RuntimeException raised while resolving that mapping is wrapped as PrestoException(JDBC_ERROR, "Failed to find remote schema name: ...").

Source

Thrown at presto-base-jdbc/src/main/java/com/facebook/presto/plugin/jdbc/BaseJdbcClient.java:684

                    "'case-insensitive-name-matching' is deprecated. Use of this configuration value may lead to query failures. " +
                            "Please switch to using 'case-sensitive-name-matching' for proper case sensitivity behavior."));
            try {
                Map<String, String> mapping = remoteSchemaNames.getIfPresent(identity);
                if (mapping != null && !mapping.containsKey(schemaName)) {
                    // This might be a schema that has just been created. Force reload.
                    mapping = null;
                }
                if (mapping == null) {
                    mapping = listSchemasByLowerCase(connection);
                    remoteSchemaNames.put(identity, mapping);
                }
                String remoteSchema = mapping.get(schemaName);
                if (remoteSchema != null) {
                    return remoteSchema;
                }
            }
            catch (RuntimeException e) {
                throw new PrestoException(JDBC_ERROR, "Failed to find remote schema name: " + firstNonNull(e.getMessage(), e), e);
            }
        }

        try {
            DatabaseMetaData metadata = connection.getMetaData();
            if (metadata.storesUpperCaseIdentifiers() && !caseSensitiveNameMatchingEnabled) {
                return schemaName.toUpperCase(ENGLISH);
            }
            return schemaName;
        }
        catch (SQLException e) {
            throw new PrestoException(JDBC_ERROR, e);
        }
    }

    protected Map<String, String> listSchemasByLowerCase(Connection connection)
    {
        return listSchemas(connection).stream()

View on GitHub (pinned to 55bb57d202)

Solutions

Fix the underlying cause shown in the wrapped e.message (e.g. invalid regex, unreadable mapping)
Validate the case-sensitive name mapping configuration/file syntax before restarting Presto
Ensure the mapping file is readable by the Presto process on all nodes
Temporarily set case-sensitive-name-matching=false if mapping is not needed

Example fix

// before (mapping pattern invalid)
case-sensitive-name-matching=true
// after: correct the mapping entry so resolution does not throw
// mapping file entry: ^MySchema$ -> MYSCHEMA  (valid regex, readable file)

Defensive patterns

Strategy: try-catch

Try / catch

try {
    SchemaTableName remote = resolveRemoteSchema(schemaName);
} catch (PrestoException e) {
    if ("Failed to find remote schema name".contains(e.getMessage().split(":")[0])) {
        // inspect the wrapped cause; fix the mapping config
        log.error("Name mapping failure: {}", e.getCause(), e);
    } else throw e;
}

Prevention

Test regex patterns in the case-sensitive name mapping against real schema names before deploying
Keep mapping files readable and identical on every Presto node
Validate mapping config at deploy time with a dry-run resolution script

When it happens

Trigger: Case-sensitive name matching is enabled and loading/parsing the configured mapping (name-matching patterns or mapping file) throws while resolving the schema; e.g. malformed regex in a mapping rule or unreadable mapping source.

Common situations: Typo or invalid regex in the mapping file configured for case-sensitive-name-matching; file permissions preventing the coordinator/worker from reading the mapping; enabling case-sensitive-name-matching without provisioning the mapping correctly.

Related errors

AI-assisted analysis of prestodb/presto@55bb57d202 (2026-09-04). Data as JSON: /api/errors/991d15674cf68f23. Report an issue: GitHub.