## Version 4.1.1

_2019-09-05_

 *  Fix: Don't drop repeated headers when validating cached responses. In our Kotlin upgrade we
    introduced a regression where we iterated the number of unique header names rather than then
    number of unique headers. If you're using OkHttp's response cache this may impact you.


## Version 4.1.0

_2019-08-12_

 [brotli]: https://github.com/google/brotli

and objects previously replicated need to be re-synced, the `mc replicate resync start` command with optional flag of `--older-than` needs to be used to trigger re-syncing of previously replicated objects. This command generates a ResetID which is a unique UUID saved to the remote target config along with the applicable date(defaults to time of initiating the reset). All objects created prior to this date are eligible for re-replication if existing object replication is enabled for the replication rule...

     */
    public void enc_ndr_referent(final Object obj, final int type) {
        if (obj == null) {
            enc_ndr_long(0);
            return;
        }
        switch (type) {
        case 1: /* unique */
        case 3: /* ref */
            enc_ndr_long(System.identityHashCode(obj));
            return;
        case 2: /* ptr */
            enc_ndr_long(getDceReferent(obj));
        }
    }

    }

    @Test
    void testEncNdrReferent() {
        Object obj1 = new Object();
        Object obj2 = new Object();

        // Test unique/ref type (type 1 or 3)
        ndrBuffer.enc_ndr_referent(obj1, 1);
        assertEquals(4, ndrBuffer.getIndex());
        assertEquals(System.identityHashCode(obj1), Encdec.dec_uint32le(buffer, 0));

The important thing to keep in mind is that the `sub` key should have a unique identifier across the entire application, and it should be a string.

## Check it { #check-it }

            int threadCount = 20;
            ExecutorService executor = Executors.newFixedThreadPool(threadCount);
            CountDownLatch latch = new CountDownLatch(threadCount);

            // Each thread uses unique data to sign
            byte[][] results = new byte[threadCount][128];

            for (int t = 0; t < threadCount; t++) {
                final int threadId = t;
                executor.submit(() -> {

			target.Endpoint == ep.Host &&
			target.Secure == (ep.Scheme == "https") &&
			target.Type == madmin.ReplicationService {
			return target.Arn
		}
	}
	return ""
}

// generate ARN that is unique to this target type
func generateARN(t *madmin.BucketTarget, deplID string) string {
	uuid := deplID
	if uuid == "" {
		uuid = mustGetUUID()
	}
	arn := madmin.ARN{
		Type:   t.Type,
		ID:     uuid,

	// Total object size.
	Size int64

	// Actual size is the real size of the object uploaded by client.
	ActualSize *int64

	// IsDir indicates if the object is prefix.
	IsDir bool

	// Hex encoded unique entity tag of the object.
	ETag string

	// Version ID of this object.
	VersionID string

	// IsLatest indicates if this is the latest current version
	// latest can be true for delete marker or a version.

credentials [here](https://github.com/minio/minio/blob/master/docs/kms/IAM.md).

> NOTE: if *path_prefix* is set then MinIO will not federate your buckets, namespaced IAM assets are assumed as isolated tenants, only buckets are considered globally unique but performing a lookup with a *bucket* which belongs to a different tenant will fail unlike federated setups where MinIO would port-forward and route the request to relevant cluster accordingly. This is a special feature, federated deployments should...

    /** The list of synonym items loaded from the dictionary file. */
    List<SynonymItem> synonymItemList;

    /**
     * Constructs a new synonym file.
     *
     * @param id        The unique identifier for this dictionary file.
     * @param path      The path to the dictionary file.
     * @param timestamp The last modified timestamp of the file.
     */