* @param attempt the current attempt number (0-based)
     * @param originalCause the original exception that triggered reconnection
     * @return a future that completes with success or failure
     */
    private CompletableFuture<HandleInfo> attemptReconnect(HandleInfo info, int attempt, Exception originalCause) {
        if (attempt >= maxRetries) {

	// Call the ServeHTTP to execute the handler.
	apiRouter.ServeHTTP(rec, req)
	switch rec.Code {
	case http.StatusOK, http.StatusCreated, http.StatusAccepted, http.StatusNoContent:
		t.Fatalf("Test %v: expected failure, but succeeded with %v", instanceType, rec.Code)
	}

	// Verify response of the V2 signed HTTP request.
	// initialize HTTP NewRecorder, this records any mutations to response writer inside the handler.

     *
     * <p>The thread manages:</p>
     * <ul>
     *   <li>Data store initialization and document processing</li>
     *   <li>Index update operations through callbacks</li>
     *   <li>Error handling and failure logging</li>
     *   <li>Cleanup of old documents after successful crawling</li>
     * </ul>
     */
    protected static class DataCrawlingThread extends Thread {

    Validator(GetCheckedTypeValidator validator) {
      this.validator = validator;
    }
  }

  private enum Result {
    SUCCESS(immediateFuture(new Object())),
    FAILURE(immediateFailedFuture(new Exception()));

    final Future<Object> future;

    Result(Future<Object> result) {
      this.future = result;
    }
  }

  private enum ExceptionType {

                    try {
                        keys = new KerberosCredentials().getKeys();
                    } catch (LoginException e) {
                        throw new PACDecodingException("Login failure", e);
                    }
                }

                Map<Integer, KerberosKey> keysByAlgo = new HashMap<>();
                for (KerberosKey key : keys) {

            assertEquals(0x9ABC, testBlock.getUid());
            assertEquals(0xDEF0, testBlock.getMid());
        }

        @Test
        @DisplayName("Test decode with signature verification failure")
        void testDecodeWithSignatureFailure() {
            testBlock = new TestServerMessageBlock(mockConfig) {
                @Override
                public boolean verifySignature(byte[] buffer, int i, int size) {

            logger
                .get()
                .log(
                    Level.WARNING,
                    "Error while attempting to shut down the service after failure.",
                    ignored);
          }
          notifyFailed(t);
          // requireNonNull is safe now, just as it was above.
          requireNonNull(runningTask).cancel(false); // prevent future invocations.

		rv=$(check_online)
		if [ "$rv" != "1" ]; then
			# success
			break
		fi

		# Check if we should retry
		retry=$((retry + 1))
		if [ $retry -le 20 ]; then
			sleep 5
			continue
		fi

		# Failure
		fail
	done

	if ! ps -p $pid1 1>&2 >/dev/null; then
		echo "minio-server-1 is not running." && fail
	fi

	if ! ps -p $pid2 1>&2 >/dev/null; then
		echo "minio-server-2 is not running." && fail
	fi

   *    has since been closed by the server.
   *  * A client timeout (HTTP 408).
   *  * A authorization challenge (HTTP 401 and 407) that is satisfied by the [Authenticator].
   *  * A retryable server failure (HTTP 503 with a `Retry-After: 0` response header).
   *  * A misdirected request (HTTP 421) on a coalesced connection.
   */
  open fun isOneShot(): Boolean = false

  companion object {

	if algo != HighwayHash256S {
		h := algo.New()
		if n, err := io.Copy(h, r); err != nil || n != wantSize {
			// Premature failure in reading the object, file is corrupt.
			return errFileCorrupt
		}
		if !bytes.Equal(h.Sum(nil), want) {
			return errFileCorrupt
		}
		return nil
	}

	h := algo.New()