- Fixed 1.31 regression that can crash kube-controller-manager's service-lb-controller loop. ([#128182](https://github.com/kubernetes/kubernetes/pull/128182), [@carlory](https://github.com/carlory)) [SIG API Machinery, Cloud Provider and Network]

## Changelog since v1.9.4

### Other notable changes

* gce: fixes race condition in ServiceController, where nodes weren't updated in the node sync loop, by updating TargetPools in the ensureExternalLoadBalancer call. ([#58368](https://github.com/kubernetes/kubernetes/pull/58368), [@MrHohn](https://github.com/MrHohn))

	}
}

// Borrowed from mutex_test.go
func HammerMutex(m *DRWMutex, loops int, cdone chan bool) {
	for range loops {
		m.Lock(id, source)
		m.Unlock(context.Background())
	}
	cdone <- true
}

// Borrowed from mutex_test.go
func TestMutex(t *testing.T) {
	loops := 200
	if testing.Short() {
		loops = 5
	}
	c := make(chan bool)
	m := NewDRWMutex(ds, "test")
	for range 10 {

	//
	// WORD
	//
	WORD	$1

	//
	// NOP
	//
	//	LNOP comma // asm doesn't support the trailing comma.
	//	{
	//		outcode(int($1), &nullgen, 0, &nullgen);
	//	}
	NOP

	//	LNOP rreg comma // asm doesn't support the trailing comma.
	//	{
	//		outcode(int($1), &$2, 0, &nullgen);
	//	}
	NOP	R2

	//	LNOP freg comma // asm doesn't support the trailing comma.
	//	{

For example, the `PATH` environment variable could look like this:

//// tab | Linux, macOS

```plaintext
/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin
```

This means that the system should look for programs in the directories:

* `/usr/local/bin`
* `/usr/bin`
* `/bin`
* `/usr/sbin`
* `/sbin`

////

        msgs.add("* contains the following plugin(s) that have goals not marked   *");
        msgs.add("* as @threadSafe to support parallel building.                  *");
        msgs.add("* While this /may/ work fine, please look for plugin updates    *");
        msgs.add("* and/or request plugins be made thread-safe.                   *");
        msgs.add("* If reporting an issue, report it against the plugin in        *");

    protected final BufferedReader reader;

    /** The line that has been read */
    protected String line = EMPTY;

    /**
     * Returns an {@link Iterable} that wraps a {@link LineIterator} for use in enhanced for-loops.
     *
     * @param reader
     *            The {@link Reader} to read strings from. Must not be {@literal null}.
     * @return An {@link Iterable} that wraps a {@link LineIterator}.
     */

     * cannot be converted to an <code>int</code>, the provided default
     * argument will be returned.
     *
     * @param props the properties to search in
     * @param key the property key to look up
     * @param def the default value to return if key is not found or cannot be parsed
     * @return the integer value of the property or the default value
     */

            result.setAvailable(true);
        }

        return result;
    }

    @Override
    public void add(RepositorySystemSession session, LocalArtifactRegistration request) {
        // noop
    }

    @Override
    public LocalMetadataResult find(RepositorySystemSession session, LocalMetadataRequest request) {
        LocalMetadataResult result = new LocalMetadataResult(request);

            result.setAvailable(true);
        }

        return result;
    }

    @Override
    public void add(RepositorySystemSession session, LocalArtifactRegistration request) {
        // noop
    }

    @Override
    public LocalMetadataResult find(RepositorySystemSession session, LocalMetadataRequest request) {
        LocalMetadataResult result = new LocalMetadataResult(request);