org.apache.hugegraph.exception.ServerException: Index 32 out of bounds for length 32

    public void set(int key, V value) {
        if (key >= this.currentSize) {
            this.expandCapacity();
        }
        // this.array is not the one that has done expandCapacity!
        this.array[key] = value;
    }

    private synchronized void expandCapacity() {
        if (this.currentSize == this.maxSize) {
            return;
        }
        this.currentSize = Math.min(this.currentSize * 2, this.maxSize);
        Object[] newArray = new Object[this.currentSize];
        System.arraycopy(this.array, 0, newArray, 0, this.array.length);
        this.clear();
        this.array = newArray;
    }