}

    /**
     * Test LRU behavior of robotsTxtUrlSet
     */
    public void test_robotsTxtUrlSet_lru() {
        Set<String> urlSet = crawlerContext.getRobotsTxtUrlSet();

        // Add URLs up to capacity (10000)
        for (int i = 0; i < 10000; i++) {
            urlSet.add("http://example" + i + ".com/robots.txt");
        }
        assertEquals(10000, urlSet.size());

    }

    @Override
    Condition delegate() {
      return delegate;
    }
  }

  private abstract static class PowerOfTwoStriped<L> extends Striped<L> {
    /** Capacity (power of two) minus one, for fast mod evaluation */
    final int mask;

    PowerOfTwoStriped(int stripes) {
      Preconditions.checkArgument(stripes > 0, "Stripes must be positive");

    LocalCache<?, ?> map = CacheTesting.toLocalCache(cache);
    assertThat(map.segments).hasLength(4); // concurrency level
    assertThat(map.segments[0].table.length()).isEqualTo(4); // capacity / conc level
  }

  @GwtIncompatible // CountDownLatch
  static final class DelayingIdentityLoader<T> extends CacheLoader<T, T> {
    private final AtomicBoolean shouldWait;

   */
  static int inferDistinctElements(Iterable<?> elements) {
    if (elements instanceof Multiset) {
      return ((Multiset<?>) elements).elementSet().size();
    }
    return 11; // initial capacity will be rounded up to 16
  }

  /**
   * Returns an unmodifiable view of the union of two multisets. In the returned multiset, the count

   */
  static int inferDistinctElements(Iterable<?> elements) {
    if (elements instanceof Multiset) {
      return ((Multiset<?>) elements).elementSet().size();
    }
    return 11; // initial capacity will be rounded up to 16
  }

  /**
   * Returns an unmodifiable view of the union of two multisets. In the returned multiset, the count

    happened enough then eventually the connection would stall.

 *  Fix: Acknowledge and apply inbound HTTP/2 settings atomically. Previously we had a race where we
    could use new flow control capacity before acknowledging it, causing strict HTTP/2 servers to
    fail the call.


## Version 4.1.1

_2019-09-05_

- [ ] Performance testing (response time, throughput)
- [ ] Security testing (authentication, authorization)
- [ ] Integration testing with client applications
- [ ] User acceptance testing
- [ ] Load testing for production capacity

### Go-Live

- [ ] Schedule maintenance window
- [ ] Final incremental data sync
- [ ] Switch DNS or endpoints to Fess
- [ ] Monitor logs for errors
- [ ] Monitor search performance metrics

- The `StorageCapacityScoring` feature gate was added to score nodes by available storage capacity. It's in alpha and disabled by default. The `VolumeCapacityPriority` alpha feature was replaced with this, and the default behavior was changed. The `VolumeCapacityPriority` preferred a node with the least allocatable, but the `StorageCapacityScoring`...

    happened enough then eventually the connection would stall.

 *  Fix: Acknowledge and apply inbound HTTP/2 settings atomically. Previously we had a race where we
    could use new flow control capacity before acknowledging it, causing strict HTTP/2 servers to
    fail the call.

 *  Fix: Recover gracefully when a coalesced connection immediately goes unhealthy.

## Version 3.14.2

_2019-05-19_

     */
    long getDiskFreeSpace() throws CIFSException;

    /**
     * Returns the length of this <code>SmbResource</code> in bytes. If this object
     * is a <code>TYPE_SHARE</code> the total capacity of the disk shared in
     * bytes is returned. If this object is a directory or a type other than
     * <code>TYPE_SHARE</code>, 0L is returned.
     *
     * @return The length of the file in bytes or 0 if this