elastic/elasticsearch · error · ClassCastException

Cannot apply [>>] operation to type [double]

Error message

Cannot apply [>>] operation to type [double]

What it means

Painless throws this ClassCastException at runtime when a right-shift (>>) operator is applied to a value that resolves to a double. As with the float stub, DefMath.rsh(double, long) exists only so the dynamic (def) dispatch path produces a readable error; double is an IEEE-754 floating-point type and bitwise shift is undefined for it. Only int and long overloads of rsh actually perform the operation.

Solutions

1. Cast the operand to int or long before the shift: '(long) x >> 1'.
2. Declare the variable with an explicit integral type instead of def to force compile-time rejection.
3. Re-examine the logic: if the value is genuinely continuous, a bitwise shift is likely a bug; replace with multiplication/division by a power of two.

Example fix

// before
def x = doc['score'].value;  // double field
def y = x >> 3;
// after
long x = (long) doc['score'].value;
long y = x >> 3;

// Cast before shifting to guarantee integral dispatch:
// def x = doc['score'].value;
// long shifted = ((long) x) >> 1;

// boolean isIntegral = x instanceof Integer || x instanceof Long || x instanceof Short || x instanceof Byte;

When it happens

Trigger: A Painless script uses def and the operand is a double at runtime: 'def x = 3.14; def y = x >> 1;'. This routes through rsh(Object, long) which, after numeric promotion, hits the double stub. Commonly seen when doc field values default to double or when arithmetic produces a double result that is then shifted.

Common situations: Doc fields mapped as double, double_valued expressions, or computed values from division that widen to double. Scripts ported from languages that silently truncate floats before shifting. Runtime-mapped fields that return double.

Related errors

• Cannot apply [>>>] operation to type [boolean]
• Cannot apply [>>] operation to type [boolean]
• Cannot apply [>>>] operation to type [double]
• Cannot apply [>>>] operation to type [float]
• Cannot apply [>>] operation to type [float]

AI-assisted analysis of elastic/elasticsearch@db6a809a66 (2026-08-12). Data as JSON: /api/errors/267c0b2223d83be1. Report an issue: GitHub.

Appendix: source

Thrown at modules/lang-painless/src/main/java/org/elasticsearch/painless/DefMath.java:1028

        } else {
            return intIntegralValue(left) << right;
        }
    }

    private static int rsh(int a, long b) {
        return a >> b;
    }

    private static long rsh(long a, long b) {
        return a >> b;
    }

    private static float rsh(float a, long b) {
        throw new ClassCastException("Cannot apply [>>] operation to type [float]");
    }

    private static double rsh(double a, long b) {
        throw new ClassCastException("Cannot apply [>>] operation to type [double]");
    }

    private static boolean rsh(boolean a, long b) {
        throw new ClassCastException("Cannot apply [>>] operation to type [boolean]");
    }

    public static Object rsh(Object left, long right) {
        if (left instanceof Long) {
            return (long) left >> right;
        } else {
            return intIntegralValue(left) >> right;
        }
    }

    private static int ush(int a, long b) {
        return a >>> b;
    }

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