hibernate/hibernate-orm · error · InstantiationException
Cannot instantiate query result type
Error message
Cannot instantiate query result type
What it means
Error "Cannot instantiate query result type" thrown in hibernate/hibernate-orm.
Source
Thrown at hibernate-core/src/main/java/org/hibernate/jpa/spi/NativeQueryConstructorTransformer.java:73
final var parameterTypes = candidate.getParameterTypes();
if ( parameterTypes.length == elements.length ) {
// found a candidate with the right number
// of parameters
if ( constructor == null ) {
constructor = resultClass.getDeclaredConstructor( parameterTypes );
constructor.setAccessible( true );
}
else {
// ambiguous, more than one constructor
// with the right number of parameters
constructor = null;
break;
}
}
}
}
catch (Exception e) {
throw new InstantiationException( "Cannot instantiate query result type", resultClass, e );
}
if ( constructor == null ) {
final var message = new StringBuilder();
message.append( "Result class" )
.append( " must have exactly one constructor with " )
.append( elements.length )
.append( " parameters - found ['" );
boolean first = true;
for ( var c : resultClass.getDeclaredConstructors() ) {
if ( c.getParameterCount() == elements.length ) {
if ( !first ) {
message.append( "', '" );
}
message.append( constructorSignature( c ) );
first = false;
}
}
View on GitHub (pinned to fad1729dce)
Solutions
- Ensure the result class has a public constructor matching the selected columns; use Tuple or Object[] result instead.
When it happens
Trigger: Thrown at hibernate-core/src/main/java/org/hibernate/jpa/spi/NativeQueryConstructorTransformer.java:73 when the library encounters an invalid state.
Common situations: See trigger scenarios.
AI-assisted analysis of hibernate/hibernate-orm@fad1729dce (2026-08-22).
Data as JSON: /api/errors/7b141637f309af42.
Report an issue: GitHub.