if test.expectedErr != nil && actualErr != test.expectedErr {
				t.Errorf("Expected to fail with %s, but failed with %s", test.expectedErr, actualErr)
			}
			if test.expectedErr == nil && actualErr != nil {
				t.Errorf("Expected to pass, but failed with %s", actualErr)
			}
		})
	}
	// Cleanup backend directories
	removeRoots(fsDirs)
}

     */
    public interface RequestListener {

        /**
         * Called when a request starts.
         *
         * @param client the fault-tolerant client
         * @param request the request data
         */
        void onRequestStart(FaultTolerantClient client, RequestData request);

        /**
         * Called before each request attempt.
         *
         * @param client the fault-tolerant client

                        .prepareOpen(docIndex)
                        .execute(ActionListener.wrap(res2 -> logger.info("Open {}", docIndex),
                                e -> logger.warn("Failed to open {}", docIndex, e)));
            }, e -> logger.warn("Failed to close {}", docIndex, e)));
        });
        saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
        return redirect(getClass());
    }

    /**

		t.Errorf("failed to update with named arg")
	}

	AssertEqual(t, result4, namedUser)

	if err := DB.Exec("UPDATE named_users SET name1 = @name, name2 = @name2, name3 = @name", sql.Named("name", "jinzhu-new"), sql.Named("name2", "jinzhu-new2")).Error; err != nil {
		t.Errorf("failed to update with named arg")
	}

	namedUser.Name1 = "jinzhu-new"

        // Test exception chaining
        Throwable rootCause = new IllegalArgumentException("Invalid argument");
        Throwable intermediateCause = new RuntimeException("Processing failed", rootCause);
        String message = "Plugin operation failed";
        PluginException exception = new PluginException(message, intermediateCause);

        assertNotNull(exception);
        assertEquals(message, exception.getMessage());

                    } catch (CIFSException e) {
                        log.error("Failed to create encryption context", e);
                        throw new SmbAuthException("Failed to setup required encryption", e);
                    }
                }

                if (preauthIntegrity) {

	if _, err := io.ReadFull(rand.Reader, data); err != nil {
		t.Fatalf("Failed to read random data: %v", err)
	}
	for i, test := range erasureEncodeDecodeTests {
		buffer := make([]byte, len(data), 2*len(data))
		copy(buffer, data)

		erasure, err := NewErasure(t.Context(), test.dataBlocks, test.parityBlocks, blockSizeV2)
		if err != nil {
			t.Fatalf("Test %d: failed to create erasure: %v", i, err)
		}

                    if (logger.isDebugEnabled()) {
                        logger.warn("[{}][{}] Failed to analyze a text(size:{}).", field, lang, buf.length(), e);
                    } else {
                        logger.warn("[{}][{}] Failed to analyze a text(size:{}). {}", field, lang, buf.length(), e.getMessage());
                    }
                }
                buf.setLength(0);

    /** The key of the message: Failed to start a job: {0}. */
    public static final String ERRORS_failed_to_start_job = "{errors.failed_to_start_job}";

    /** The key of the message: Failed to stop a job: {0}. */
    public static final String ERRORS_failed_to_stop_job = "{errors.failed_to_stop_job}";

    /** The key of the message: Failed to download a synonym file. */

    READY,
    NOT_READY,
    DONE,
    FAILED,
  }

  private @Nullable T next;

  protected abstract @Nullable T computeNext();

  @CanIgnoreReturnValue
  protected final @Nullable T endOfData() {
    state = State.DONE;
    return null;
  }

  @Override
  public final boolean hasNext() {
    checkState(state != State.FAILED);
    switch (state) {
      case DONE:
        return false;