return StringUtil.EMPTY; // empty
        }
    }

    /**
     * Processes and normalizes document content.
     * Applies text normalization including duplicate term removal, size limits,
     * and space character handling. May preserve original content based on configuration.
     *
     * @param crawlingConfig the crawling configuration containing processing parameters

     */
    public static byte[] readBytes(final File file) {
        return readBytes(file, MAX_BUF_SIZE);
    }

    /**
     * Reads the contents of a file into a byte array and returns it with a custom size limit.
     * <p>
     * <strong>Note:</strong> This method loads the entire file into memory.
     * An {@link IORuntimeException} will be thrown if the file exceeds the specified maxSize

 * the life cycle methods.
 *
 * <h3>Usage Example</h3>
 *
 * <p>Here is a sketch of a service which crawls a website and uses the scheduling capabilities to
 * rate limit itself.
 *
 * {@snippet :
 * class CrawlingService extends AbstractScheduledService {
 *   private Set<Uri> visited;
 *   private Queue<Uri> toCrawl;
 *   protected void startUp() throws Exception {

    BlockingQueue<Future<T>> futureQueue = Queues.newLinkedBlockingQueue();
    long timeoutNanos = unit.toNanos(timeout);

    // For efficiency, especially in executors with limited
    // parallelism, check to see if previously submitted tasks are
    // done before submitting more of them. This interleaving
    // plus the exception mechanics account for messiness of main
    // loop.

        assertEquals(1.0, noRetryPolicy.getBackoffMultiplier());
        assertFalse(noRetryPolicy.isExponentialBackoff());
    }

    @Test
    @DisplayName("Should limit retry delay to maximum")
    void testMaxDelayLimit() {
        // Given
        SmbOperationException.RetryPolicy policy = new SmbOperationException.RetryPolicy(10, 1000, 5000, 2.0, true);

			 "node.name":"search_engine",
			 "discovery.seed_hosts":"search_engine",
			 "cluster.initial_cluster_manager_nodes":"search_engine",
			 "node.roles":"cluster_manager,data,ingest,ml",
			 -->
			 "indices.breaker.total.limit":"100%",
			 "action.auto_create_index":"-*"}
		</property>
		<!-- Dictionaries -->
		<postConstruct name="addConfigFile">
			<arg>"fess"</arg>
			<arg>"mapping.txt"</arg>
		</postConstruct>

    String SUGGEST_UPDATE_CONTENTS_LIMIT_NUM_PERCENTAGE = "suggest.update.contents.limit.num.percentage";

    /** The key of the configuration. e.g. 10000 */
    String SUGGEST_UPDATE_CONTENTS_LIMIT_NUM = "suggest.update.contents.limit.num";

    /** The key of the configuration. e.g. 50000 */
    String SUGGEST_UPDATE_CONTENTS_LIMIT_DOC_SIZE = "suggest.update.contents.limit.doc.size";

    /** The key of the configuration. e.g. 1 */

### PID Limits graduates to General Availability

PID Limits features are now generally available on both `SupportNodePidsLimit` (node-to-pod PID isolation) and `SupportPodPidsLimit` (ability to limit PIDs per pod), after being enabled-by-default in beta stage for a year.

### API Priority and Fairness graduates to Beta

      finalResults.clear();
    }
    executor.shutdown();
  }

  // In a previous implementation this would cause a stack overflow after ~2000 futures chained
  // together.  Now it should only be limited by available memory (and time)
  public void testSetFuture_stackOverflow() {
    SettableFuture<String> orig = SettableFuture.create();
    SettableFuture<String> prev = orig;
    for (int i = 0; i < 100000; i++) {

### Promoted core CSI Migration to Stable