awaitTermination(t2);
    assertEquals(SIZE * COUNTDOWN, c1.counts + c2.counts);
  }

  /** a deserialized serialized array holds same values */
  public void testSerialization() throws Exception {
    AtomicDoubleArray x = new AtomicDoubleArray(SIZE);
    for (int i = 0; i < SIZE; i++) {
      x.set(i, (double) -i);
    }
    AtomicDoubleArray y = serialClone(x);
    assertTrue(x != y);

  private PairedStatsAccumulator constantValuesAccumulator;
  private PairedStatsAccumulator constantValuesAccumulatorByAddAllPartitionedPairedStats;

  @Override
  protected void setUp() throws Exception {
    super.setUp();

    emptyAccumulator = new PairedStatsAccumulator();

    emptyAccumulatorByAddAllEmptyPairedStats = new PairedStatsAccumulator();

                    log.debug("Connection retry also failed", retryException);
                    throw e; // Throw original exception
                }
            }
            throw e;
        }
    }

    /**
     * Checks if an exception is retryable for connection establishment
     */
    private boolean isRetryableException(CIFSException e) {
        if (e instanceof SmbException) {

└── fess-crawler-opensearch/  # OpenSearch backend
```

### Key Components

#### Core Engine
- **Crawler**: Main orchestrator managing crawl execution
- **CrawlerContext**: Execution context and configuration
- **CrawlerThread**: Individual crawler thread implementation

#### Client Architecture
- **HcHttpClient**: HTTP/HTTPS client using Apache HttpComponents

        }

    }

    // This is just a marker output folder to allow this task being up-to-date.
    // The check logic is exception driven so a failed tasks will not be defined
    // by this output but when successful we can safely mark the task as up-to-date.
    @OutputDirectory
    public File getOutputMarker() {

 *   <li>Setting {@code maven.consumer.pom.flatten=true} removes them during transformation</li>
 *   <li>Otherwise, an exception is thrown requiring one of the above options or manual mixin removal</li>
 * </ul>
 * <p>
 * <b>Dependency Filtering</b>: For non-POM projects with dependency management, the builder:
 * <ul>

constraints.UriType.message = {item} has an unrecognized URI.
constraints.CronExpression.message = {item} is not a valid CRON expression.

# ----------------------------------------------------------
# Application Exception
# ---------------------
# /- - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# five framework-embedded messages (don't change key names)
# - - - - - - - - - -/
errors.login.failure = Login failed.

constraints.UriType.message = {item} has an unrecognized URI.
constraints.CronExpression.message = {item} is not a valid CRON expression.

# ----------------------------------------------------------
# Application Exception
# ---------------------
# /- - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# five framework-embedded messages (don't change key names)
# - - - - - - - - - -/
errors.login.failure = Login failed.

   * escaping algorithm to perform more efficiently.
   *
   * <p>If the implementation of this method cannot correctly handle a particular code point then it
   * should either throw an appropriate runtime exception or return a suitable replacement
   * character. It must never silently discard invalid input as this may constitute a security risk.
   *
   * @param cp the Unicode code point to escape if necessary

        // Should throw IOException when file doesn't exist
        try {
            cache.close();
            fail("Expected IOException for non-existent file");
        } catch (IOException e) {
            // Expected - file doesn't exist
        }
    }

    @Test
    public void testMemoryCacheWithBinaryData() throws IOException {
        // Test with binary data containing all byte values