prestodb/presto · error · IllegalArgumentException

arrayOffset is negative

Error message

arrayOffset is negative

What it means

validateConstructorArguments rejects a negative arrayOffset when building an ArrayBlock. This fires when the starting offset into the offsets array is invalid — corrupt or miscomputed block construction parameters.

Source

Thrown at presto-common/src/main/java/com/facebook/presto/common/block/ArrayBlock.java:78

                throw new IllegalArgumentException("A null array must have zero entries");
            }
        }
        return new ArrayBlock(0, positionCount, valueIsNull, arrayOffset, values);
    }

    /**
     * Create an array block directly without per element validations.
     */
    static ArrayBlock createArrayBlockInternal(int arrayOffset, int positionCount, @Nullable boolean[] valueIsNull, int[] offsets, Block values)
    {
        validateConstructorArguments(arrayOffset, positionCount, valueIsNull, offsets, values);
        return new ArrayBlock(arrayOffset, positionCount, valueIsNull, offsets, values);
    }

    private static void validateConstructorArguments(int arrayOffset, int positionCount, @Nullable boolean[] valueIsNull, int[] offsets, Block values)
    {
        if (arrayOffset < 0) {
            throw new IllegalArgumentException("arrayOffset is negative");
        }

        if (positionCount < 0) {
            throw new IllegalArgumentException("positionCount is negative");
        }

        if (valueIsNull != null && valueIsNull.length - arrayOffset < positionCount) {
            throw new IllegalArgumentException("isNull length is less than positionCount");
        }

        requireNonNull(offsets, "offsets is null");
        if (offsets.length - arrayOffset < positionCount + 1) {
            throw new IllegalArgumentException("offsets length is less than positionCount");
        }

        requireNonNull(values, "values is null");
    }

View on GitHub (pinned to 55bb57d202)

Solutions

1. Fix the caller producing a negative arrayOffset (view/slice arithmetic bug)
2. Pass a non-negative base offset when constructing the block

When it happens

Trigger: Thrown at presto-common/src/main/java/com/facebook/presto/common/block/ArrayBlock.java:78 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of prestodb/presto@55bb57d202 (2026-09-04). Data as JSON: /api/errors/ab820764e6fcf38a. Report an issue: GitHub.