List<String> cycle = cde.getCycle();
        assertNotNull(cycle, "Cycle should be not null");
        assertTrue(cycle.contains("a"), "Cycle contains 'a'");
        assertTrue(cycle.contains("b"), "Cycle contains 'b'");
        assertTrue(cycle.contains("c"), "Cycle contains 'c'");

        Graph graph3 = new Graph();
        addEdge(graph3, "a", "b");

    }

    public static class CycleDetectedException extends Exception {
        private final List<String> cycle;

        CycleDetectedException(String message, List<String> cycle) {
            super(message);
            this.cycle = cycle;
        }

        public List<String> getCycle() {
            return cycle;
        }

        @Override
        public String getMessage() {

* Fix the DOCKER_OPTS appending bug. ([#33163](https://github.com/kubernetes/kubernetes/pull/33163), [@DjangoPeng](https://github.com/DjangoPeng))
* Send recycle events from pod to pv. ([#27714](https://github.com/kubernetes/kubernetes/pull/27714), [@jsafrane](https://github.com/jsafrane))

    static class CycleDetectedException extends RuntimeException {
        private final List<String> cycle;

        CycleDetectedException(String message, List<String> cycle) {
            super(message);
            this.cycle = cycle;
        }

        public List<String> getCycle() {
            return cycle;
        }

        @Override
        public String getMessage() {

    private final List<String> cycle;

    public CycleDetectedException(String message, List<String> cycle) {
        super(message);
        this.cycle = cycle;
    }

    public List<String> getCycle() {
        return cycle;
    }

    @Override
    public String getMessage() {
        return super.getMessage() + " " + String.join(" --> ", cycle);
    }

* Bump up addon kube-dns to v20 for graceful termination ([#33774](https://github.com/kubernetes/kubernetes/pull/33774), [@MrHohn](https://github.com/MrHohn))
* Send recycle events from pod to pv. ([#27714](https://github.com/kubernetes/kubernetes/pull/27714), [@jsafrane](https://github.com/jsafrane))

    *   AWS EBS volumes are detached if attached to a different node than expected. ([#55491](https://github.com/kubernetes/kubernetes/pull/55491),[ @gnufied](https://github.com/gnufied))
    *   PV Recycle now works in environments that use architectures other than x86. ([#53958](https://github.com/kubernetes/kubernetes/pull/53958),[ @dixudx](https://github.com/dixudx))

	minSleep time.Duration

	// cycle will be closed
	cycle chan struct{}

	// isScanner should be set when this is used by the scanner
	// to record metrics.
	isScanner bool
}

// newDynamicSleeper
func newDynamicSleeper(factor float64, maxWait time.Duration, isScanner bool) *dynamicSleeper {
	return &dynamicSleeper{
		factor:    factor,
		cycle:     make(chan struct{}),
		maxSleep:  maxWait,

- Added warning for `PV` on reclaim policy when it is `Recycle`. ([#122339](https://github.com/kubernetes/kubernetes/pull/122339), [@carlory](https://github.com/carlory))

        from.children.add(to);
        to.parents.add(from);
        List<String> cycle = findCycle(to);
        if (cycle != null) {
            // remove edge which introduced cycle
            removeEdge(from, to);
            throw new CycleDetectedException(
                    "Edge between '" + from.label + "' and '" + to.label + "' introduces to cycle in the graph", cycle);
        }
    }

    void removeEdge(Vertex from, Vertex to) {