// Running at time 50, the pool returns that nothing can be evicted until time 150.
    assertThat(pool.closeConnections(50L)).isEqualTo(100L)
    assertThat(pool.connectionCount()).isEqualTo(1)
    assertThat(c1.socket().isClosed).isFalse()

    // Running at time 60, the pool returns that nothing can be evicted until time 150.
    assertThat(pool.closeConnections(60L)).isEqualTo(90L)

   *
   * <p>If {@code maximumWeight} is zero, elements will be evicted immediately after being loaded
   * into cache. This can be useful in testing, or to disable caching temporarily.
   *
   * <p>Note that weight is only used to determine whether the cache is over capacity; it has no
   * effect on selecting which entry should be evicted next.
   *

            // key3 should definitely exist (just created)
            assertNotNull(limitedManager.getLease(key3));

            // key1 should have been evicted (oldest)
            assertNull(limitedManager.getLease(key1));

            // key2 should still exist (not the oldest)
            assertNotNull(limitedManager.getLease(key2));
        } finally {

        assertEquals(10000, urlSet.size());
        assertTrue(urlSet.contains("http://overflow.com/robots.txt"));
        assertFalse(urlSet.contains("http://example0.com/robots.txt")); // First one should be evicted
    }

    /**
     * Test activeThreadCountLock getter
     */
    public void test_activeThreadCountLock() {
        Object lock = crawlerContext.getActiveThreadCountLock();
        assertNotNull(lock);

        
        // Verify caching behavior
        assertTrue(file.canCacheWrite());
    }
}
```

## 9. Performance Considerations

### 9.1 Memory Management
- Lease entries should be evicted based on LRU when max leases reached
- Implement periodic cleanup of expired leases

### 9.2 Thread Safety
- Use concurrent data structures for lease storage
- Minimize lock contention in hot paths

   * will not be returned. If existing responses are evicted during iteration, they will be absent
   * (unless they were already returned).
   *
   * The iterator supports [MutableIterator.remove]. Removing a URL from the iterator evicts the
   * corresponding response from the cache. Use this to evict selected responses.
   */
  @Throws(IOException::class)
  fun urls(): MutableIterator<String> {

        .build(),
    )
    val url = server.url("/a")
    assertThat(get(url).body.string()).isEqualTo("a")
    val i: Iterator<String> = cache.urls()
    cache.evictAll()

    // The URL was evicted before hasNext() made any promises.
    assertThat(i.hasNext()).isFalse()
    assertFailsWith<NoSuchElementException> {
      i.next()
    }
  }

- The PodDisruptionBudget `spec.unhealthyPodEvictionPolicy` field has graduated to GA. This field may be set to `AlwaysAllow` to always allow unhealthy pods covered by the PodDisruptionBudget to be evicted. ([#123428](https://github.com/kubernetes/kubernetes/pull/123428), [@atiratree](https://github.com/atiratree)) [SIG Apps, Auth, Node and Testing]

- DRA: Device taints enable DRA drivers or admins to mark device as unusable, which prevents allocating them. Pods may also get evicted at runtime if a device becomes unusable, depending on the severity of the taint and whether the claim tolerates the taint. ([#130447](https://github.com/kubernetes/kubernetes/pull/130447), [@pohly](https://github.com/pohly)) [SIG API Machinery, Apps,...

     *
     * @param key the key with which the specified value is to be associated
     * @param value the value to be associated with the specified key
     * @return the previous value associated with key, or null if no mapping existed
     */
    @Override
    public Object put(final String key, final Object value) {
        return parent.put(key, value);
    }

    /**