You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@hbase.apache.org by mi...@apache.org on 2016/02/23 18:08:25 UTC

[17/51] [partial] hbase-site git commit: Published site at 58283fa1b1b10beec62cefa40babff6a1424b06c.

http://git-wip-us.apache.org/repos/asf/hbase-site/blob/d02dd5db/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.BucketEntryGroup.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.BucketEntryGroup.html b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.BucketEntryGroup.html
index 3a9a7f7..d857fe6 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.BucketEntryGroup.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.BucketEntryGroup.html
@@ -311,1174 +311,1177 @@
 <span class="sourceLineNo">303</span>   */<a name="line.303"></a>
 <span class="sourceLineNo">304</span>  private IOEngine getIOEngineFromName(String ioEngineName, long capacity)<a name="line.304"></a>
 <span class="sourceLineNo">305</span>      throws IOException {<a name="line.305"></a>
-<span class="sourceLineNo">306</span>    if (ioEngineName.startsWith("file:"))<a name="line.306"></a>
+<span class="sourceLineNo">306</span>    if (ioEngineName.startsWith("file:")) {<a name="line.306"></a>
 <span class="sourceLineNo">307</span>      return new FileIOEngine(ioEngineName.substring(5), capacity);<a name="line.307"></a>
-<span class="sourceLineNo">308</span>    else if (ioEngineName.startsWith("offheap"))<a name="line.308"></a>
+<span class="sourceLineNo">308</span>    } else if (ioEngineName.startsWith("offheap")) {<a name="line.308"></a>
 <span class="sourceLineNo">309</span>      return new ByteBufferIOEngine(capacity, true);<a name="line.309"></a>
-<span class="sourceLineNo">310</span>    else if (ioEngineName.startsWith("heap"))<a name="line.310"></a>
+<span class="sourceLineNo">310</span>    } else if (ioEngineName.startsWith("heap")) {<a name="line.310"></a>
 <span class="sourceLineNo">311</span>      return new ByteBufferIOEngine(capacity, false);<a name="line.311"></a>
-<span class="sourceLineNo">312</span>    else<a name="line.312"></a>
-<span class="sourceLineNo">313</span>      throw new IllegalArgumentException(<a name="line.313"></a>
-<span class="sourceLineNo">314</span>          "Don't understand io engine name for cache - prefix with file:, heap or offheap");<a name="line.314"></a>
-<span class="sourceLineNo">315</span>  }<a name="line.315"></a>
-<span class="sourceLineNo">316</span><a name="line.316"></a>
-<span class="sourceLineNo">317</span>  /**<a name="line.317"></a>
-<span class="sourceLineNo">318</span>   * Cache the block with the specified name and buffer.<a name="line.318"></a>
-<span class="sourceLineNo">319</span>   * @param cacheKey block's cache key<a name="line.319"></a>
-<span class="sourceLineNo">320</span>   * @param buf block buffer<a name="line.320"></a>
-<span class="sourceLineNo">321</span>   */<a name="line.321"></a>
-<span class="sourceLineNo">322</span>  @Override<a name="line.322"></a>
-<span class="sourceLineNo">323</span>  public void cacheBlock(BlockCacheKey cacheKey, Cacheable buf) {<a name="line.323"></a>
-<span class="sourceLineNo">324</span>    cacheBlock(cacheKey, buf, false, false);<a name="line.324"></a>
-<span class="sourceLineNo">325</span>  }<a name="line.325"></a>
-<span class="sourceLineNo">326</span><a name="line.326"></a>
-<span class="sourceLineNo">327</span>  /**<a name="line.327"></a>
-<span class="sourceLineNo">328</span>   * Cache the block with the specified name and buffer.<a name="line.328"></a>
-<span class="sourceLineNo">329</span>   * @param cacheKey block's cache key<a name="line.329"></a>
-<span class="sourceLineNo">330</span>   * @param cachedItem block buffer<a name="line.330"></a>
-<span class="sourceLineNo">331</span>   * @param inMemory if block is in-memory<a name="line.331"></a>
-<span class="sourceLineNo">332</span>   * @param cacheDataInL1<a name="line.332"></a>
-<span class="sourceLineNo">333</span>   */<a name="line.333"></a>
-<span class="sourceLineNo">334</span>  @Override<a name="line.334"></a>
-<span class="sourceLineNo">335</span>  public void cacheBlock(BlockCacheKey cacheKey, Cacheable cachedItem, boolean inMemory,<a name="line.335"></a>
-<span class="sourceLineNo">336</span>      final boolean cacheDataInL1) {<a name="line.336"></a>
-<span class="sourceLineNo">337</span>    cacheBlockWithWait(cacheKey, cachedItem, inMemory, wait_when_cache);<a name="line.337"></a>
-<span class="sourceLineNo">338</span>  }<a name="line.338"></a>
-<span class="sourceLineNo">339</span><a name="line.339"></a>
-<span class="sourceLineNo">340</span>  /**<a name="line.340"></a>
-<span class="sourceLineNo">341</span>   * Cache the block to ramCache<a name="line.341"></a>
-<span class="sourceLineNo">342</span>   * @param cacheKey block's cache key<a name="line.342"></a>
-<span class="sourceLineNo">343</span>   * @param cachedItem block buffer<a name="line.343"></a>
-<span class="sourceLineNo">344</span>   * @param inMemory if block is in-memory<a name="line.344"></a>
-<span class="sourceLineNo">345</span>   * @param wait if true, blocking wait when queue is full<a name="line.345"></a>
-<span class="sourceLineNo">346</span>   */<a name="line.346"></a>
-<span class="sourceLineNo">347</span>  public void cacheBlockWithWait(BlockCacheKey cacheKey, Cacheable cachedItem, boolean inMemory,<a name="line.347"></a>
-<span class="sourceLineNo">348</span>      boolean wait) {<a name="line.348"></a>
-<span class="sourceLineNo">349</span>    if (!cacheEnabled) {<a name="line.349"></a>
-<span class="sourceLineNo">350</span>      return;<a name="line.350"></a>
-<span class="sourceLineNo">351</span>    }<a name="line.351"></a>
-<span class="sourceLineNo">352</span><a name="line.352"></a>
-<span class="sourceLineNo">353</span>    if (backingMap.containsKey(cacheKey)) {<a name="line.353"></a>
-<span class="sourceLineNo">354</span>      return;<a name="line.354"></a>
-<span class="sourceLineNo">355</span>    }<a name="line.355"></a>
-<span class="sourceLineNo">356</span><a name="line.356"></a>
-<span class="sourceLineNo">357</span>    /*<a name="line.357"></a>
-<span class="sourceLineNo">358</span>     * Stuff the entry into the RAM cache so it can get drained to the persistent store<a name="line.358"></a>
-<span class="sourceLineNo">359</span>     */<a name="line.359"></a>
-<span class="sourceLineNo">360</span>    RAMQueueEntry re =<a name="line.360"></a>
-<span class="sourceLineNo">361</span>        new RAMQueueEntry(cacheKey, cachedItem, accessCount.incrementAndGet(), inMemory);<a name="line.361"></a>
-<span class="sourceLineNo">362</span>    if (ramCache.putIfAbsent(cacheKey, re) != null) {<a name="line.362"></a>
-<span class="sourceLineNo">363</span>      return;<a name="line.363"></a>
-<span class="sourceLineNo">364</span>    }<a name="line.364"></a>
-<span class="sourceLineNo">365</span>    int queueNum = (cacheKey.hashCode() &amp; 0x7FFFFFFF) % writerQueues.size();<a name="line.365"></a>
-<span class="sourceLineNo">366</span>    BlockingQueue&lt;RAMQueueEntry&gt; bq = writerQueues.get(queueNum);<a name="line.366"></a>
-<span class="sourceLineNo">367</span>    boolean successfulAddition = false;<a name="line.367"></a>
-<span class="sourceLineNo">368</span>    if (wait) {<a name="line.368"></a>
-<span class="sourceLineNo">369</span>      try {<a name="line.369"></a>
-<span class="sourceLineNo">370</span>        successfulAddition = bq.offer(re, DEFAULT_CACHE_WAIT_TIME, TimeUnit.MILLISECONDS);<a name="line.370"></a>
-<span class="sourceLineNo">371</span>      } catch (InterruptedException e) {<a name="line.371"></a>
-<span class="sourceLineNo">372</span>        Thread.currentThread().interrupt();<a name="line.372"></a>
-<span class="sourceLineNo">373</span>      }<a name="line.373"></a>
-<span class="sourceLineNo">374</span>    } else {<a name="line.374"></a>
-<span class="sourceLineNo">375</span>      successfulAddition = bq.offer(re);<a name="line.375"></a>
-<span class="sourceLineNo">376</span>    }<a name="line.376"></a>
-<span class="sourceLineNo">377</span>    if (!successfulAddition) {<a name="line.377"></a>
-<span class="sourceLineNo">378</span>      ramCache.remove(cacheKey);<a name="line.378"></a>
-<span class="sourceLineNo">379</span>      cacheStats.failInsert();<a name="line.379"></a>
-<span class="sourceLineNo">380</span>    } else {<a name="line.380"></a>
-<span class="sourceLineNo">381</span>      this.blockNumber.incrementAndGet();<a name="line.381"></a>
-<span class="sourceLineNo">382</span>      this.heapSize.addAndGet(cachedItem.heapSize());<a name="line.382"></a>
-<span class="sourceLineNo">383</span>      blocksByHFile.put(cacheKey.getHfileName(), cacheKey);<a name="line.383"></a>
-<span class="sourceLineNo">384</span>    }<a name="line.384"></a>
-<span class="sourceLineNo">385</span>  }<a name="line.385"></a>
-<span class="sourceLineNo">386</span><a name="line.386"></a>
-<span class="sourceLineNo">387</span>  /**<a name="line.387"></a>
-<span class="sourceLineNo">388</span>   * Get the buffer of the block with the specified key.<a name="line.388"></a>
-<span class="sourceLineNo">389</span>   * @param key block's cache key<a name="line.389"></a>
-<span class="sourceLineNo">390</span>   * @param caching true if the caller caches blocks on cache misses<a name="line.390"></a>
-<span class="sourceLineNo">391</span>   * @param repeat Whether this is a repeat lookup for the same block<a name="line.391"></a>
-<span class="sourceLineNo">392</span>   * @param updateCacheMetrics Whether we should update cache metrics or not<a name="line.392"></a>
-<span class="sourceLineNo">393</span>   * @return buffer of specified cache key, or null if not in cache<a name="line.393"></a>
-<span class="sourceLineNo">394</span>   */<a name="line.394"></a>
-<span class="sourceLineNo">395</span>  @Override<a name="line.395"></a>
-<span class="sourceLineNo">396</span>  public Cacheable getBlock(BlockCacheKey key, boolean caching, boolean repeat,<a name="line.396"></a>
-<span class="sourceLineNo">397</span>      boolean updateCacheMetrics) {<a name="line.397"></a>
-<span class="sourceLineNo">398</span>    if (!cacheEnabled) {<a name="line.398"></a>
-<span class="sourceLineNo">399</span>      return null;<a name="line.399"></a>
-<span class="sourceLineNo">400</span>    }<a name="line.400"></a>
-<span class="sourceLineNo">401</span>    RAMQueueEntry re = ramCache.get(key);<a name="line.401"></a>
-<span class="sourceLineNo">402</span>    if (re != null) {<a name="line.402"></a>
-<span class="sourceLineNo">403</span>      if (updateCacheMetrics) {<a name="line.403"></a>
-<span class="sourceLineNo">404</span>        cacheStats.hit(caching, key.isPrimary());<a name="line.404"></a>
-<span class="sourceLineNo">405</span>      }<a name="line.405"></a>
-<span class="sourceLineNo">406</span>      re.access(accessCount.incrementAndGet());<a name="line.406"></a>
-<span class="sourceLineNo">407</span>      return re.getData();<a name="line.407"></a>
-<span class="sourceLineNo">408</span>    }<a name="line.408"></a>
-<span class="sourceLineNo">409</span>    BucketEntry bucketEntry = backingMap.get(key);<a name="line.409"></a>
-<span class="sourceLineNo">410</span>    if (bucketEntry != null) {<a name="line.410"></a>
-<span class="sourceLineNo">411</span>      long start = System.nanoTime();<a name="line.411"></a>
-<span class="sourceLineNo">412</span>      ReentrantReadWriteLock lock = offsetLock.getLock(bucketEntry.offset());<a name="line.412"></a>
-<span class="sourceLineNo">413</span>      try {<a name="line.413"></a>
-<span class="sourceLineNo">414</span>        lock.readLock().lock();<a name="line.414"></a>
-<span class="sourceLineNo">415</span>        // We can not read here even if backingMap does contain the given key because its offset<a name="line.415"></a>
-<span class="sourceLineNo">416</span>        // maybe changed. If we lock BlockCacheKey instead of offset, then we can only check<a name="line.416"></a>
-<span class="sourceLineNo">417</span>        // existence here.<a name="line.417"></a>
-<span class="sourceLineNo">418</span>        if (bucketEntry.equals(backingMap.get(key))) {<a name="line.418"></a>
-<span class="sourceLineNo">419</span>          // TODO : change this area - should be removed after server cells and<a name="line.419"></a>
-<span class="sourceLineNo">420</span>          // 12295 are available<a name="line.420"></a>
-<span class="sourceLineNo">421</span>          int len = bucketEntry.getLength();<a name="line.421"></a>
-<span class="sourceLineNo">422</span>          Cacheable cachedBlock = ioEngine.read(bucketEntry.offset(), len,<a name="line.422"></a>
-<span class="sourceLineNo">423</span>              bucketEntry.deserializerReference(this.deserialiserMap));<a name="line.423"></a>
-<span class="sourceLineNo">424</span>          long timeTaken = System.nanoTime() - start;<a name="line.424"></a>
-<span class="sourceLineNo">425</span>          if (updateCacheMetrics) {<a name="line.425"></a>
-<span class="sourceLineNo">426</span>            cacheStats.hit(caching, key.isPrimary());<a name="line.426"></a>
-<span class="sourceLineNo">427</span>            cacheStats.ioHit(timeTaken);<a name="line.427"></a>
-<span class="sourceLineNo">428</span>          }<a name="line.428"></a>
-<span class="sourceLineNo">429</span>          if (cachedBlock.getMemoryType() == MemoryType.SHARED) {<a name="line.429"></a>
-<span class="sourceLineNo">430</span>            bucketEntry.refCount.incrementAndGet();<a name="line.430"></a>
+<span class="sourceLineNo">312</span>    } else if (ioEngineName.startsWith("mmap:")) {<a name="line.312"></a>
+<span class="sourceLineNo">313</span>      return new FileMmapEngine(ioEngineName.substring(5), capacity);<a name="line.313"></a>
+<span class="sourceLineNo">314</span>    } else {<a name="line.314"></a>
+<span class="sourceLineNo">315</span>      throw new IllegalArgumentException(<a name="line.315"></a>
+<span class="sourceLineNo">316</span>          "Don't understand io engine name for cache - prefix with file:, heap or offheap");<a name="line.316"></a>
+<span class="sourceLineNo">317</span>    }<a name="line.317"></a>
+<span class="sourceLineNo">318</span>  }<a name="line.318"></a>
+<span class="sourceLineNo">319</span><a name="line.319"></a>
+<span class="sourceLineNo">320</span>  /**<a name="line.320"></a>
+<span class="sourceLineNo">321</span>   * Cache the block with the specified name and buffer.<a name="line.321"></a>
+<span class="sourceLineNo">322</span>   * @param cacheKey block's cache key<a name="line.322"></a>
+<span class="sourceLineNo">323</span>   * @param buf block buffer<a name="line.323"></a>
+<span class="sourceLineNo">324</span>   */<a name="line.324"></a>
+<span class="sourceLineNo">325</span>  @Override<a name="line.325"></a>
+<span class="sourceLineNo">326</span>  public void cacheBlock(BlockCacheKey cacheKey, Cacheable buf) {<a name="line.326"></a>
+<span class="sourceLineNo">327</span>    cacheBlock(cacheKey, buf, false, false);<a name="line.327"></a>
+<span class="sourceLineNo">328</span>  }<a name="line.328"></a>
+<span class="sourceLineNo">329</span><a name="line.329"></a>
+<span class="sourceLineNo">330</span>  /**<a name="line.330"></a>
+<span class="sourceLineNo">331</span>   * Cache the block with the specified name and buffer.<a name="line.331"></a>
+<span class="sourceLineNo">332</span>   * @param cacheKey block's cache key<a name="line.332"></a>
+<span class="sourceLineNo">333</span>   * @param cachedItem block buffer<a name="line.333"></a>
+<span class="sourceLineNo">334</span>   * @param inMemory if block is in-memory<a name="line.334"></a>
+<span class="sourceLineNo">335</span>   * @param cacheDataInL1<a name="line.335"></a>
+<span class="sourceLineNo">336</span>   */<a name="line.336"></a>
+<span class="sourceLineNo">337</span>  @Override<a name="line.337"></a>
+<span class="sourceLineNo">338</span>  public void cacheBlock(BlockCacheKey cacheKey, Cacheable cachedItem, boolean inMemory,<a name="line.338"></a>
+<span class="sourceLineNo">339</span>      final boolean cacheDataInL1) {<a name="line.339"></a>
+<span class="sourceLineNo">340</span>    cacheBlockWithWait(cacheKey, cachedItem, inMemory, wait_when_cache);<a name="line.340"></a>
+<span class="sourceLineNo">341</span>  }<a name="line.341"></a>
+<span class="sourceLineNo">342</span><a name="line.342"></a>
+<span class="sourceLineNo">343</span>  /**<a name="line.343"></a>
+<span class="sourceLineNo">344</span>   * Cache the block to ramCache<a name="line.344"></a>
+<span class="sourceLineNo">345</span>   * @param cacheKey block's cache key<a name="line.345"></a>
+<span class="sourceLineNo">346</span>   * @param cachedItem block buffer<a name="line.346"></a>
+<span class="sourceLineNo">347</span>   * @param inMemory if block is in-memory<a name="line.347"></a>
+<span class="sourceLineNo">348</span>   * @param wait if true, blocking wait when queue is full<a name="line.348"></a>
+<span class="sourceLineNo">349</span>   */<a name="line.349"></a>
+<span class="sourceLineNo">350</span>  public void cacheBlockWithWait(BlockCacheKey cacheKey, Cacheable cachedItem, boolean inMemory,<a name="line.350"></a>
+<span class="sourceLineNo">351</span>      boolean wait) {<a name="line.351"></a>
+<span class="sourceLineNo">352</span>    if (!cacheEnabled) {<a name="line.352"></a>
+<span class="sourceLineNo">353</span>      return;<a name="line.353"></a>
+<span class="sourceLineNo">354</span>    }<a name="line.354"></a>
+<span class="sourceLineNo">355</span><a name="line.355"></a>
+<span class="sourceLineNo">356</span>    if (backingMap.containsKey(cacheKey)) {<a name="line.356"></a>
+<span class="sourceLineNo">357</span>      return;<a name="line.357"></a>
+<span class="sourceLineNo">358</span>    }<a name="line.358"></a>
+<span class="sourceLineNo">359</span><a name="line.359"></a>
+<span class="sourceLineNo">360</span>    /*<a name="line.360"></a>
+<span class="sourceLineNo">361</span>     * Stuff the entry into the RAM cache so it can get drained to the persistent store<a name="line.361"></a>
+<span class="sourceLineNo">362</span>     */<a name="line.362"></a>
+<span class="sourceLineNo">363</span>    RAMQueueEntry re =<a name="line.363"></a>
+<span class="sourceLineNo">364</span>        new RAMQueueEntry(cacheKey, cachedItem, accessCount.incrementAndGet(), inMemory);<a name="line.364"></a>
+<span class="sourceLineNo">365</span>    if (ramCache.putIfAbsent(cacheKey, re) != null) {<a name="line.365"></a>
+<span class="sourceLineNo">366</span>      return;<a name="line.366"></a>
+<span class="sourceLineNo">367</span>    }<a name="line.367"></a>
+<span class="sourceLineNo">368</span>    int queueNum = (cacheKey.hashCode() &amp; 0x7FFFFFFF) % writerQueues.size();<a name="line.368"></a>
+<span class="sourceLineNo">369</span>    BlockingQueue&lt;RAMQueueEntry&gt; bq = writerQueues.get(queueNum);<a name="line.369"></a>
+<span class="sourceLineNo">370</span>    boolean successfulAddition = false;<a name="line.370"></a>
+<span class="sourceLineNo">371</span>    if (wait) {<a name="line.371"></a>
+<span class="sourceLineNo">372</span>      try {<a name="line.372"></a>
+<span class="sourceLineNo">373</span>        successfulAddition = bq.offer(re, DEFAULT_CACHE_WAIT_TIME, TimeUnit.MILLISECONDS);<a name="line.373"></a>
+<span class="sourceLineNo">374</span>      } catch (InterruptedException e) {<a name="line.374"></a>
+<span class="sourceLineNo">375</span>        Thread.currentThread().interrupt();<a name="line.375"></a>
+<span class="sourceLineNo">376</span>      }<a name="line.376"></a>
+<span class="sourceLineNo">377</span>    } else {<a name="line.377"></a>
+<span class="sourceLineNo">378</span>      successfulAddition = bq.offer(re);<a name="line.378"></a>
+<span class="sourceLineNo">379</span>    }<a name="line.379"></a>
+<span class="sourceLineNo">380</span>    if (!successfulAddition) {<a name="line.380"></a>
+<span class="sourceLineNo">381</span>      ramCache.remove(cacheKey);<a name="line.381"></a>
+<span class="sourceLineNo">382</span>      cacheStats.failInsert();<a name="line.382"></a>
+<span class="sourceLineNo">383</span>    } else {<a name="line.383"></a>
+<span class="sourceLineNo">384</span>      this.blockNumber.incrementAndGet();<a name="line.384"></a>
+<span class="sourceLineNo">385</span>      this.heapSize.addAndGet(cachedItem.heapSize());<a name="line.385"></a>
+<span class="sourceLineNo">386</span>      blocksByHFile.put(cacheKey.getHfileName(), cacheKey);<a name="line.386"></a>
+<span class="sourceLineNo">387</span>    }<a name="line.387"></a>
+<span class="sourceLineNo">388</span>  }<a name="line.388"></a>
+<span class="sourceLineNo">389</span><a name="line.389"></a>
+<span class="sourceLineNo">390</span>  /**<a name="line.390"></a>
+<span class="sourceLineNo">391</span>   * Get the buffer of the block with the specified key.<a name="line.391"></a>
+<span class="sourceLineNo">392</span>   * @param key block's cache key<a name="line.392"></a>
+<span class="sourceLineNo">393</span>   * @param caching true if the caller caches blocks on cache misses<a name="line.393"></a>
+<span class="sourceLineNo">394</span>   * @param repeat Whether this is a repeat lookup for the same block<a name="line.394"></a>
+<span class="sourceLineNo">395</span>   * @param updateCacheMetrics Whether we should update cache metrics or not<a name="line.395"></a>
+<span class="sourceLineNo">396</span>   * @return buffer of specified cache key, or null if not in cache<a name="line.396"></a>
+<span class="sourceLineNo">397</span>   */<a name="line.397"></a>
+<span class="sourceLineNo">398</span>  @Override<a name="line.398"></a>
+<span class="sourceLineNo">399</span>  public Cacheable getBlock(BlockCacheKey key, boolean caching, boolean repeat,<a name="line.399"></a>
+<span class="sourceLineNo">400</span>      boolean updateCacheMetrics) {<a name="line.400"></a>
+<span class="sourceLineNo">401</span>    if (!cacheEnabled) {<a name="line.401"></a>
+<span class="sourceLineNo">402</span>      return null;<a name="line.402"></a>
+<span class="sourceLineNo">403</span>    }<a name="line.403"></a>
+<span class="sourceLineNo">404</span>    RAMQueueEntry re = ramCache.get(key);<a name="line.404"></a>
+<span class="sourceLineNo">405</span>    if (re != null) {<a name="line.405"></a>
+<span class="sourceLineNo">406</span>      if (updateCacheMetrics) {<a name="line.406"></a>
+<span class="sourceLineNo">407</span>        cacheStats.hit(caching, key.isPrimary());<a name="line.407"></a>
+<span class="sourceLineNo">408</span>      }<a name="line.408"></a>
+<span class="sourceLineNo">409</span>      re.access(accessCount.incrementAndGet());<a name="line.409"></a>
+<span class="sourceLineNo">410</span>      return re.getData();<a name="line.410"></a>
+<span class="sourceLineNo">411</span>    }<a name="line.411"></a>
+<span class="sourceLineNo">412</span>    BucketEntry bucketEntry = backingMap.get(key);<a name="line.412"></a>
+<span class="sourceLineNo">413</span>    if (bucketEntry != null) {<a name="line.413"></a>
+<span class="sourceLineNo">414</span>      long start = System.nanoTime();<a name="line.414"></a>
+<span class="sourceLineNo">415</span>      ReentrantReadWriteLock lock = offsetLock.getLock(bucketEntry.offset());<a name="line.415"></a>
+<span class="sourceLineNo">416</span>      try {<a name="line.416"></a>
+<span class="sourceLineNo">417</span>        lock.readLock().lock();<a name="line.417"></a>
+<span class="sourceLineNo">418</span>        // We can not read here even if backingMap does contain the given key because its offset<a name="line.418"></a>
+<span class="sourceLineNo">419</span>        // maybe changed. If we lock BlockCacheKey instead of offset, then we can only check<a name="line.419"></a>
+<span class="sourceLineNo">420</span>        // existence here.<a name="line.420"></a>
+<span class="sourceLineNo">421</span>        if (bucketEntry.equals(backingMap.get(key))) {<a name="line.421"></a>
+<span class="sourceLineNo">422</span>          // TODO : change this area - should be removed after server cells and<a name="line.422"></a>
+<span class="sourceLineNo">423</span>          // 12295 are available<a name="line.423"></a>
+<span class="sourceLineNo">424</span>          int len = bucketEntry.getLength();<a name="line.424"></a>
+<span class="sourceLineNo">425</span>          Cacheable cachedBlock = ioEngine.read(bucketEntry.offset(), len,<a name="line.425"></a>
+<span class="sourceLineNo">426</span>              bucketEntry.deserializerReference(this.deserialiserMap));<a name="line.426"></a>
+<span class="sourceLineNo">427</span>          long timeTaken = System.nanoTime() - start;<a name="line.427"></a>
+<span class="sourceLineNo">428</span>          if (updateCacheMetrics) {<a name="line.428"></a>
+<span class="sourceLineNo">429</span>            cacheStats.hit(caching, key.isPrimary());<a name="line.429"></a>
+<span class="sourceLineNo">430</span>            cacheStats.ioHit(timeTaken);<a name="line.430"></a>
 <span class="sourceLineNo">431</span>          }<a name="line.431"></a>
-<span class="sourceLineNo">432</span>          bucketEntry.access(accessCount.incrementAndGet());<a name="line.432"></a>
-<span class="sourceLineNo">433</span>          if (this.ioErrorStartTime &gt; 0) {<a name="line.433"></a>
-<span class="sourceLineNo">434</span>            ioErrorStartTime = -1;<a name="line.434"></a>
-<span class="sourceLineNo">435</span>          }<a name="line.435"></a>
-<span class="sourceLineNo">436</span>          return cachedBlock;<a name="line.436"></a>
-<span class="sourceLineNo">437</span>        }<a name="line.437"></a>
-<span class="sourceLineNo">438</span>      } catch (IOException ioex) {<a name="line.438"></a>
-<span class="sourceLineNo">439</span>        LOG.error("Failed reading block " + key + " from bucket cache", ioex);<a name="line.439"></a>
-<span class="sourceLineNo">440</span>        checkIOErrorIsTolerated();<a name="line.440"></a>
-<span class="sourceLineNo">441</span>      } finally {<a name="line.441"></a>
-<span class="sourceLineNo">442</span>        lock.readLock().unlock();<a name="line.442"></a>
-<span class="sourceLineNo">443</span>      }<a name="line.443"></a>
-<span class="sourceLineNo">444</span>    }<a name="line.444"></a>
-<span class="sourceLineNo">445</span>    if (!repeat &amp;&amp; updateCacheMetrics) {<a name="line.445"></a>
-<span class="sourceLineNo">446</span>      cacheStats.miss(caching, key.isPrimary());<a name="line.446"></a>
+<span class="sourceLineNo">432</span>          if (cachedBlock.getMemoryType() == MemoryType.SHARED) {<a name="line.432"></a>
+<span class="sourceLineNo">433</span>            bucketEntry.refCount.incrementAndGet();<a name="line.433"></a>
+<span class="sourceLineNo">434</span>          }<a name="line.434"></a>
+<span class="sourceLineNo">435</span>          bucketEntry.access(accessCount.incrementAndGet());<a name="line.435"></a>
+<span class="sourceLineNo">436</span>          if (this.ioErrorStartTime &gt; 0) {<a name="line.436"></a>
+<span class="sourceLineNo">437</span>            ioErrorStartTime = -1;<a name="line.437"></a>
+<span class="sourceLineNo">438</span>          }<a name="line.438"></a>
+<span class="sourceLineNo">439</span>          return cachedBlock;<a name="line.439"></a>
+<span class="sourceLineNo">440</span>        }<a name="line.440"></a>
+<span class="sourceLineNo">441</span>      } catch (IOException ioex) {<a name="line.441"></a>
+<span class="sourceLineNo">442</span>        LOG.error("Failed reading block " + key + " from bucket cache", ioex);<a name="line.442"></a>
+<span class="sourceLineNo">443</span>        checkIOErrorIsTolerated();<a name="line.443"></a>
+<span class="sourceLineNo">444</span>      } finally {<a name="line.444"></a>
+<span class="sourceLineNo">445</span>        lock.readLock().unlock();<a name="line.445"></a>
+<span class="sourceLineNo">446</span>      }<a name="line.446"></a>
 <span class="sourceLineNo">447</span>    }<a name="line.447"></a>
-<span class="sourceLineNo">448</span>    return null;<a name="line.448"></a>
-<span class="sourceLineNo">449</span>  }<a name="line.449"></a>
-<span class="sourceLineNo">450</span><a name="line.450"></a>
-<span class="sourceLineNo">451</span>  @VisibleForTesting<a name="line.451"></a>
-<span class="sourceLineNo">452</span>  void blockEvicted(BlockCacheKey cacheKey, BucketEntry bucketEntry, boolean decrementBlockNumber) {<a name="line.452"></a>
-<span class="sourceLineNo">453</span>    bucketAllocator.freeBlock(bucketEntry.offset());<a name="line.453"></a>
-<span class="sourceLineNo">454</span>    realCacheSize.addAndGet(-1 * bucketEntry.getLength());<a name="line.454"></a>
-<span class="sourceLineNo">455</span>    blocksByHFile.remove(cacheKey.getHfileName(), cacheKey);<a name="line.455"></a>
-<span class="sourceLineNo">456</span>    if (decrementBlockNumber) {<a name="line.456"></a>
-<span class="sourceLineNo">457</span>      this.blockNumber.decrementAndGet();<a name="line.457"></a>
-<span class="sourceLineNo">458</span>    }<a name="line.458"></a>
-<span class="sourceLineNo">459</span>  }<a name="line.459"></a>
-<span class="sourceLineNo">460</span><a name="line.460"></a>
-<span class="sourceLineNo">461</span>  @Override<a name="line.461"></a>
-<span class="sourceLineNo">462</span>  public boolean evictBlock(BlockCacheKey cacheKey) {<a name="line.462"></a>
-<span class="sourceLineNo">463</span>    return evictBlock(cacheKey, true);<a name="line.463"></a>
-<span class="sourceLineNo">464</span>  }<a name="line.464"></a>
-<span class="sourceLineNo">465</span><a name="line.465"></a>
-<span class="sourceLineNo">466</span>  // does not check for the ref count. Just tries to evict it if found in the<a name="line.466"></a>
-<span class="sourceLineNo">467</span>  // bucket map<a name="line.467"></a>
-<span class="sourceLineNo">468</span>  private boolean forceEvict(BlockCacheKey cacheKey) {<a name="line.468"></a>
-<span class="sourceLineNo">469</span>    if (!cacheEnabled) {<a name="line.469"></a>
-<span class="sourceLineNo">470</span>      return false;<a name="line.470"></a>
-<span class="sourceLineNo">471</span>    }<a name="line.471"></a>
-<span class="sourceLineNo">472</span>    RAMQueueEntry removedBlock = checkRamCache(cacheKey);<a name="line.472"></a>
-<span class="sourceLineNo">473</span>    BucketEntry bucketEntry = backingMap.get(cacheKey);<a name="line.473"></a>
-<span class="sourceLineNo">474</span>    if (bucketEntry == null) {<a name="line.474"></a>
-<span class="sourceLineNo">475</span>      if (removedBlock != null) {<a name="line.475"></a>
-<span class="sourceLineNo">476</span>        cacheStats.evicted(0, cacheKey.isPrimary());<a name="line.476"></a>
-<span class="sourceLineNo">477</span>        return true;<a name="line.477"></a>
-<span class="sourceLineNo">478</span>      } else {<a name="line.478"></a>
-<span class="sourceLineNo">479</span>        return false;<a name="line.479"></a>
-<span class="sourceLineNo">480</span>      }<a name="line.480"></a>
-<span class="sourceLineNo">481</span>    }<a name="line.481"></a>
-<span class="sourceLineNo">482</span>    ReentrantReadWriteLock lock = offsetLock.getLock(bucketEntry.offset());<a name="line.482"></a>
-<span class="sourceLineNo">483</span>    try {<a name="line.483"></a>
-<span class="sourceLineNo">484</span>      lock.writeLock().lock();<a name="line.484"></a>
-<span class="sourceLineNo">485</span>      if (backingMap.remove(cacheKey, bucketEntry)) {<a name="line.485"></a>
-<span class="sourceLineNo">486</span>        blockEvicted(cacheKey, bucketEntry, removedBlock == null);<a name="line.486"></a>
-<span class="sourceLineNo">487</span>      } else {<a name="line.487"></a>
-<span class="sourceLineNo">488</span>        return false;<a name="line.488"></a>
-<span class="sourceLineNo">489</span>      }<a name="line.489"></a>
-<span class="sourceLineNo">490</span>    } finally {<a name="line.490"></a>
-<span class="sourceLineNo">491</span>      lock.writeLock().unlock();<a name="line.491"></a>
-<span class="sourceLineNo">492</span>    }<a name="line.492"></a>
-<span class="sourceLineNo">493</span>    cacheStats.evicted(bucketEntry.getCachedTime(), cacheKey.isPrimary());<a name="line.493"></a>
-<span class="sourceLineNo">494</span>    return true;<a name="line.494"></a>
-<span class="sourceLineNo">495</span>  }<a name="line.495"></a>
-<span class="sourceLineNo">496</span><a name="line.496"></a>
-<span class="sourceLineNo">497</span>  private RAMQueueEntry checkRamCache(BlockCacheKey cacheKey) {<a name="line.497"></a>
-<span class="sourceLineNo">498</span>    RAMQueueEntry removedBlock = ramCache.remove(cacheKey);<a name="line.498"></a>
-<span class="sourceLineNo">499</span>    if (removedBlock != null) {<a name="line.499"></a>
-<span class="sourceLineNo">500</span>      this.blockNumber.decrementAndGet();<a name="line.500"></a>
-<span class="sourceLineNo">501</span>      this.heapSize.addAndGet(-1 * removedBlock.getData().heapSize());<a name="line.501"></a>
-<span class="sourceLineNo">502</span>    }<a name="line.502"></a>
-<span class="sourceLineNo">503</span>    return removedBlock;<a name="line.503"></a>
-<span class="sourceLineNo">504</span>  }<a name="line.504"></a>
-<span class="sourceLineNo">505</span><a name="line.505"></a>
-<span class="sourceLineNo">506</span>  public boolean evictBlock(BlockCacheKey cacheKey, boolean deletedBlock) {<a name="line.506"></a>
-<span class="sourceLineNo">507</span>    if (!cacheEnabled) {<a name="line.507"></a>
-<span class="sourceLineNo">508</span>      return false;<a name="line.508"></a>
-<span class="sourceLineNo">509</span>    }<a name="line.509"></a>
-<span class="sourceLineNo">510</span>    RAMQueueEntry removedBlock = checkRamCache(cacheKey);<a name="line.510"></a>
-<span class="sourceLineNo">511</span>    BucketEntry bucketEntry = backingMap.get(cacheKey);<a name="line.511"></a>
-<span class="sourceLineNo">512</span>    if (bucketEntry == null) {<a name="line.512"></a>
-<span class="sourceLineNo">513</span>      if (removedBlock != null) {<a name="line.513"></a>
-<span class="sourceLineNo">514</span>        cacheStats.evicted(0, cacheKey.isPrimary());<a name="line.514"></a>
-<span class="sourceLineNo">515</span>        return true;<a name="line.515"></a>
-<span class="sourceLineNo">516</span>      } else {<a name="line.516"></a>
-<span class="sourceLineNo">517</span>        return false;<a name="line.517"></a>
-<span class="sourceLineNo">518</span>      }<a name="line.518"></a>
-<span class="sourceLineNo">519</span>    }<a name="line.519"></a>
-<span class="sourceLineNo">520</span>    ReentrantReadWriteLock lock = offsetLock.getLock(bucketEntry.offset());<a name="line.520"></a>
-<span class="sourceLineNo">521</span>    try {<a name="line.521"></a>
-<span class="sourceLineNo">522</span>      lock.writeLock().lock();<a name="line.522"></a>
-<span class="sourceLineNo">523</span>      int refCount = bucketEntry.refCount.get();<a name="line.523"></a>
-<span class="sourceLineNo">524</span>      if(refCount == 0) {<a name="line.524"></a>
-<span class="sourceLineNo">525</span>        if (backingMap.remove(cacheKey, bucketEntry)) {<a name="line.525"></a>
-<span class="sourceLineNo">526</span>          blockEvicted(cacheKey, bucketEntry, removedBlock == null);<a name="line.526"></a>
-<span class="sourceLineNo">527</span>        } else {<a name="line.527"></a>
-<span class="sourceLineNo">528</span>          return false;<a name="line.528"></a>
-<span class="sourceLineNo">529</span>        }<a name="line.529"></a>
-<span class="sourceLineNo">530</span>      } else {<a name="line.530"></a>
-<span class="sourceLineNo">531</span>        if(!deletedBlock) {<a name="line.531"></a>
-<span class="sourceLineNo">532</span>          if (LOG.isDebugEnabled()) {<a name="line.532"></a>
-<span class="sourceLineNo">533</span>            LOG.debug("This block " + cacheKey + " is still referred by " + refCount<a name="line.533"></a>
-<span class="sourceLineNo">534</span>                + " readers. Can not be freed now");<a name="line.534"></a>
-<span class="sourceLineNo">535</span>          }<a name="line.535"></a>
-<span class="sourceLineNo">536</span>          return false;<a name="line.536"></a>
-<span class="sourceLineNo">537</span>        } else {<a name="line.537"></a>
-<span class="sourceLineNo">538</span>          if (LOG.isDebugEnabled()) {<a name="line.538"></a>
-<span class="sourceLineNo">539</span>            LOG.debug("This block " + cacheKey + " is still referred by " + refCount<a name="line.539"></a>
-<span class="sourceLineNo">540</span>                + " readers. Can not be freed now. Hence will mark this"<a name="line.540"></a>
-<span class="sourceLineNo">541</span>                + " for evicting at a later point");<a name="line.541"></a>
-<span class="sourceLineNo">542</span>          }<a name="line.542"></a>
-<span class="sourceLineNo">543</span>          bucketEntry.markedForEvict = true;<a name="line.543"></a>
-<span class="sourceLineNo">544</span>        }<a name="line.544"></a>
-<span class="sourceLineNo">545</span>      }<a name="line.545"></a>
-<span class="sourceLineNo">546</span>    } finally {<a name="line.546"></a>
-<span class="sourceLineNo">547</span>      lock.writeLock().unlock();<a name="line.547"></a>
-<span class="sourceLineNo">548</span>    }<a name="line.548"></a>
-<span class="sourceLineNo">549</span>    cacheStats.evicted(bucketEntry.getCachedTime(), cacheKey.isPrimary());<a name="line.549"></a>
-<span class="sourceLineNo">550</span>    return true;<a name="line.550"></a>
-<span class="sourceLineNo">551</span>  }<a name="line.551"></a>
-<span class="sourceLineNo">552</span><a name="line.552"></a>
-<span class="sourceLineNo">553</span>  /*<a name="line.553"></a>
-<span class="sourceLineNo">554</span>   * Statistics thread.  Periodically output cache statistics to the log.<a name="line.554"></a>
-<span class="sourceLineNo">555</span>   */<a name="line.555"></a>
-<span class="sourceLineNo">556</span>  private static class StatisticsThread extends Thread {<a name="line.556"></a>
-<span class="sourceLineNo">557</span>    private final BucketCache bucketCache;<a name="line.557"></a>
-<span class="sourceLineNo">558</span><a name="line.558"></a>
-<span class="sourceLineNo">559</span>    public StatisticsThread(BucketCache bucketCache) {<a name="line.559"></a>
-<span class="sourceLineNo">560</span>      super("BucketCacheStatsThread");<a name="line.560"></a>
-<span class="sourceLineNo">561</span>      setDaemon(true);<a name="line.561"></a>
-<span class="sourceLineNo">562</span>      this.bucketCache = bucketCache;<a name="line.562"></a>
-<span class="sourceLineNo">563</span>    }<a name="line.563"></a>
-<span class="sourceLineNo">564</span><a name="line.564"></a>
-<span class="sourceLineNo">565</span>    @Override<a name="line.565"></a>
-<span class="sourceLineNo">566</span>    public void run() {<a name="line.566"></a>
-<span class="sourceLineNo">567</span>      bucketCache.logStats();<a name="line.567"></a>
-<span class="sourceLineNo">568</span>    }<a name="line.568"></a>
-<span class="sourceLineNo">569</span>  }<a name="line.569"></a>
-<span class="sourceLineNo">570</span><a name="line.570"></a>
-<span class="sourceLineNo">571</span>  public void logStats() {<a name="line.571"></a>
-<span class="sourceLineNo">572</span>    long totalSize = bucketAllocator.getTotalSize();<a name="line.572"></a>
-<span class="sourceLineNo">573</span>    long usedSize = bucketAllocator.getUsedSize();<a name="line.573"></a>
-<span class="sourceLineNo">574</span>    long freeSize = totalSize - usedSize;<a name="line.574"></a>
-<span class="sourceLineNo">575</span>    long cacheSize = getRealCacheSize();<a name="line.575"></a>
-<span class="sourceLineNo">576</span>    LOG.info("failedBlockAdditions=" + cacheStats.getFailedInserts() + ", " +<a name="line.576"></a>
-<span class="sourceLineNo">577</span>        "totalSize=" + StringUtils.byteDesc(totalSize) + ", " +<a name="line.577"></a>
-<span class="sourceLineNo">578</span>        "freeSize=" + StringUtils.byteDesc(freeSize) + ", " +<a name="line.578"></a>
-<span class="sourceLineNo">579</span>        "usedSize=" + StringUtils.byteDesc(usedSize) +", " +<a name="line.579"></a>
-<span class="sourceLineNo">580</span>        "cacheSize=" + StringUtils.byteDesc(cacheSize) +", " +<a name="line.580"></a>
-<span class="sourceLineNo">581</span>        "accesses=" + cacheStats.getRequestCount() + ", " +<a name="line.581"></a>
-<span class="sourceLineNo">582</span>        "hits=" + cacheStats.getHitCount() + ", " +<a name="line.582"></a>
-<span class="sourceLineNo">583</span>        "IOhitsPerSecond=" + cacheStats.getIOHitsPerSecond() + ", " +<a name="line.583"></a>
-<span class="sourceLineNo">584</span>        "IOTimePerHit=" + String.format("%.2f", cacheStats.getIOTimePerHit())+ ", " +<a name="line.584"></a>
-<span class="sourceLineNo">585</span>        "hitRatio=" + (cacheStats.getHitCount() == 0 ? "0," :<a name="line.585"></a>
-<span class="sourceLineNo">586</span>          (StringUtils.formatPercent(cacheStats.getHitRatio(), 2)+ ", ")) +<a name="line.586"></a>
-<span class="sourceLineNo">587</span>        "cachingAccesses=" + cacheStats.getRequestCachingCount() + ", " +<a name="line.587"></a>
-<span class="sourceLineNo">588</span>        "cachingHits=" + cacheStats.getHitCachingCount() + ", " +<a name="line.588"></a>
-<span class="sourceLineNo">589</span>        "cachingHitsRatio=" +(cacheStats.getHitCachingCount() == 0 ? "0," :<a name="line.589"></a>
-<span class="sourceLineNo">590</span>          (StringUtils.formatPercent(cacheStats.getHitCachingRatio(), 2)+ ", ")) +<a name="line.590"></a>
-<span class="sourceLineNo">591</span>        "evictions=" + cacheStats.getEvictionCount() + ", " +<a name="line.591"></a>
-<span class="sourceLineNo">592</span>        "evicted=" + cacheStats.getEvictedCount() + ", " +<a name="line.592"></a>
-<span class="sourceLineNo">593</span>        "evictedPerRun=" + cacheStats.evictedPerEviction());<a name="line.593"></a>
-<span class="sourceLineNo">594</span>    cacheStats.reset();<a name="line.594"></a>
-<span class="sourceLineNo">595</span>  }<a name="line.595"></a>
-<span class="sourceLineNo">596</span><a name="line.596"></a>
-<span class="sourceLineNo">597</span>  public long getRealCacheSize() {<a name="line.597"></a>
-<span class="sourceLineNo">598</span>    return this.realCacheSize.get();<a name="line.598"></a>
-<span class="sourceLineNo">599</span>  }<a name="line.599"></a>
-<span class="sourceLineNo">600</span><a name="line.600"></a>
-<span class="sourceLineNo">601</span>  private long acceptableSize() {<a name="line.601"></a>
-<span class="sourceLineNo">602</span>    return (long) Math.floor(bucketAllocator.getTotalSize() * DEFAULT_ACCEPT_FACTOR);<a name="line.602"></a>
-<span class="sourceLineNo">603</span>  }<a name="line.603"></a>
-<span class="sourceLineNo">604</span><a name="line.604"></a>
-<span class="sourceLineNo">605</span>  private long singleSize() {<a name="line.605"></a>
-<span class="sourceLineNo">606</span>    return (long) Math.floor(bucketAllocator.getTotalSize()<a name="line.606"></a>
-<span class="sourceLineNo">607</span>        * DEFAULT_SINGLE_FACTOR * DEFAULT_MIN_FACTOR);<a name="line.607"></a>
-<span class="sourceLineNo">608</span>  }<a name="line.608"></a>
-<span class="sourceLineNo">609</span><a name="line.609"></a>
-<span class="sourceLineNo">610</span>  private long multiSize() {<a name="line.610"></a>
-<span class="sourceLineNo">611</span>    return (long) Math.floor(bucketAllocator.getTotalSize() * DEFAULT_MULTI_FACTOR<a name="line.611"></a>
-<span class="sourceLineNo">612</span>        * DEFAULT_MIN_FACTOR);<a name="line.612"></a>
-<span class="sourceLineNo">613</span>  }<a name="line.613"></a>
-<span class="sourceLineNo">614</span><a name="line.614"></a>
-<span class="sourceLineNo">615</span>  private long memorySize() {<a name="line.615"></a>
-<span class="sourceLineNo">616</span>    return (long) Math.floor(bucketAllocator.getTotalSize() * DEFAULT_MEMORY_FACTOR<a name="line.616"></a>
-<span class="sourceLineNo">617</span>        * DEFAULT_MIN_FACTOR);<a name="line.617"></a>
-<span class="sourceLineNo">618</span>  }<a name="line.618"></a>
-<span class="sourceLineNo">619</span><a name="line.619"></a>
-<span class="sourceLineNo">620</span>  /**<a name="line.620"></a>
-<span class="sourceLineNo">621</span>   * Free the space if the used size reaches acceptableSize() or one size block<a name="line.621"></a>
-<span class="sourceLineNo">622</span>   * couldn't be allocated. When freeing the space, we use the LRU algorithm and<a name="line.622"></a>
-<span class="sourceLineNo">623</span>   * ensure there must be some blocks evicted<a name="line.623"></a>
-<span class="sourceLineNo">624</span>   * @param why Why we are being called<a name="line.624"></a>
-<span class="sourceLineNo">625</span>   */<a name="line.625"></a>
-<span class="sourceLineNo">626</span>  private void freeSpace(final String why) {<a name="line.626"></a>
-<span class="sourceLineNo">627</span>    // Ensure only one freeSpace progress at a time<a name="line.627"></a>
-<span class="sourceLineNo">628</span>    if (!freeSpaceLock.tryLock()) return;<a name="line.628"></a>
-<span class="sourceLineNo">629</span>    try {<a name="line.629"></a>
-<span class="sourceLineNo">630</span>      freeInProgress = true;<a name="line.630"></a>
-<span class="sourceLineNo">631</span>      long bytesToFreeWithoutExtra = 0;<a name="line.631"></a>
-<span class="sourceLineNo">632</span>      // Calculate free byte for each bucketSizeinfo<a name="line.632"></a>
-<span class="sourceLineNo">633</span>      StringBuffer msgBuffer = LOG.isDebugEnabled()? new StringBuffer(): null;<a name="line.633"></a>
-<span class="sourceLineNo">634</span>      BucketAllocator.IndexStatistics[] stats = bucketAllocator.getIndexStatistics();<a name="line.634"></a>
-<span class="sourceLineNo">635</span>      long[] bytesToFreeForBucket = new long[stats.length];<a name="line.635"></a>
-<span class="sourceLineNo">636</span>      for (int i = 0; i &lt; stats.length; i++) {<a name="line.636"></a>
-<span class="sourceLineNo">637</span>        bytesToFreeForBucket[i] = 0;<a name="line.637"></a>
-<span class="sourceLineNo">638</span>        long freeGoal = (long) Math.floor(stats[i].totalCount() * (1 - DEFAULT_MIN_FACTOR));<a name="line.638"></a>
-<span class="sourceLineNo">639</span>        freeGoal = Math.max(freeGoal, 1);<a name="line.639"></a>
-<span class="sourceLineNo">640</span>        if (stats[i].freeCount() &lt; freeGoal) {<a name="line.640"></a>
-<span class="sourceLineNo">641</span>          bytesToFreeForBucket[i] = stats[i].itemSize() * (freeGoal - stats[i].freeCount());<a name="line.641"></a>
-<span class="sourceLineNo">642</span>          bytesToFreeWithoutExtra += bytesToFreeForBucket[i];<a name="line.642"></a>
-<span class="sourceLineNo">643</span>          if (msgBuffer != null) {<a name="line.643"></a>
-<span class="sourceLineNo">644</span>            msgBuffer.append("Free for bucketSize(" + stats[i].itemSize() + ")="<a name="line.644"></a>
-<span class="sourceLineNo">645</span>              + StringUtils.byteDesc(bytesToFreeForBucket[i]) + ", ");<a name="line.645"></a>
-<span class="sourceLineNo">646</span>          }<a name="line.646"></a>
-<span class="sourceLineNo">647</span>        }<a name="line.647"></a>
-<span class="sourceLineNo">648</span>      }<a name="line.648"></a>
-<span class="sourceLineNo">649</span>      if (msgBuffer != null) {<a name="line.649"></a>
-<span class="sourceLineNo">650</span>        msgBuffer.append("Free for total=" + StringUtils.byteDesc(bytesToFreeWithoutExtra) + ", ");<a name="line.650"></a>
+<span class="sourceLineNo">448</span>    if (!repeat &amp;&amp; updateCacheMetrics) {<a name="line.448"></a>
+<span class="sourceLineNo">449</span>      cacheStats.miss(caching, key.isPrimary());<a name="line.449"></a>
+<span class="sourceLineNo">450</span>    }<a name="line.450"></a>
+<span class="sourceLineNo">451</span>    return null;<a name="line.451"></a>
+<span class="sourceLineNo">452</span>  }<a name="line.452"></a>
+<span class="sourceLineNo">453</span><a name="line.453"></a>
+<span class="sourceLineNo">454</span>  @VisibleForTesting<a name="line.454"></a>
+<span class="sourceLineNo">455</span>  void blockEvicted(BlockCacheKey cacheKey, BucketEntry bucketEntry, boolean decrementBlockNumber) {<a name="line.455"></a>
+<span class="sourceLineNo">456</span>    bucketAllocator.freeBlock(bucketEntry.offset());<a name="line.456"></a>
+<span class="sourceLineNo">457</span>    realCacheSize.addAndGet(-1 * bucketEntry.getLength());<a name="line.457"></a>
+<span class="sourceLineNo">458</span>    blocksByHFile.remove(cacheKey.getHfileName(), cacheKey);<a name="line.458"></a>
+<span class="sourceLineNo">459</span>    if (decrementBlockNumber) {<a name="line.459"></a>
+<span class="sourceLineNo">460</span>      this.blockNumber.decrementAndGet();<a name="line.460"></a>
+<span class="sourceLineNo">461</span>    }<a name="line.461"></a>
+<span class="sourceLineNo">462</span>  }<a name="line.462"></a>
+<span class="sourceLineNo">463</span><a name="line.463"></a>
+<span class="sourceLineNo">464</span>  @Override<a name="line.464"></a>
+<span class="sourceLineNo">465</span>  public boolean evictBlock(BlockCacheKey cacheKey) {<a name="line.465"></a>
+<span class="sourceLineNo">466</span>    return evictBlock(cacheKey, true);<a name="line.466"></a>
+<span class="sourceLineNo">467</span>  }<a name="line.467"></a>
+<span class="sourceLineNo">468</span><a name="line.468"></a>
+<span class="sourceLineNo">469</span>  // does not check for the ref count. Just tries to evict it if found in the<a name="line.469"></a>
+<span class="sourceLineNo">470</span>  // bucket map<a name="line.470"></a>
+<span class="sourceLineNo">471</span>  private boolean forceEvict(BlockCacheKey cacheKey) {<a name="line.471"></a>
+<span class="sourceLineNo">472</span>    if (!cacheEnabled) {<a name="line.472"></a>
+<span class="sourceLineNo">473</span>      return false;<a name="line.473"></a>
+<span class="sourceLineNo">474</span>    }<a name="line.474"></a>
+<span class="sourceLineNo">475</span>    RAMQueueEntry removedBlock = checkRamCache(cacheKey);<a name="line.475"></a>
+<span class="sourceLineNo">476</span>    BucketEntry bucketEntry = backingMap.get(cacheKey);<a name="line.476"></a>
+<span class="sourceLineNo">477</span>    if (bucketEntry == null) {<a name="line.477"></a>
+<span class="sourceLineNo">478</span>      if (removedBlock != null) {<a name="line.478"></a>
+<span class="sourceLineNo">479</span>        cacheStats.evicted(0, cacheKey.isPrimary());<a name="line.479"></a>
+<span class="sourceLineNo">480</span>        return true;<a name="line.480"></a>
+<span class="sourceLineNo">481</span>      } else {<a name="line.481"></a>
+<span class="sourceLineNo">482</span>        return false;<a name="line.482"></a>
+<span class="sourceLineNo">483</span>      }<a name="line.483"></a>
+<span class="sourceLineNo">484</span>    }<a name="line.484"></a>
+<span class="sourceLineNo">485</span>    ReentrantReadWriteLock lock = offsetLock.getLock(bucketEntry.offset());<a name="line.485"></a>
+<span class="sourceLineNo">486</span>    try {<a name="line.486"></a>
+<span class="sourceLineNo">487</span>      lock.writeLock().lock();<a name="line.487"></a>
+<span class="sourceLineNo">488</span>      if (backingMap.remove(cacheKey, bucketEntry)) {<a name="line.488"></a>
+<span class="sourceLineNo">489</span>        blockEvicted(cacheKey, bucketEntry, removedBlock == null);<a name="line.489"></a>
+<span class="sourceLineNo">490</span>      } else {<a name="line.490"></a>
+<span class="sourceLineNo">491</span>        return false;<a name="line.491"></a>
+<span class="sourceLineNo">492</span>      }<a name="line.492"></a>
+<span class="sourceLineNo">493</span>    } finally {<a name="line.493"></a>
+<span class="sourceLineNo">494</span>      lock.writeLock().unlock();<a name="line.494"></a>
+<span class="sourceLineNo">495</span>    }<a name="line.495"></a>
+<span class="sourceLineNo">496</span>    cacheStats.evicted(bucketEntry.getCachedTime(), cacheKey.isPrimary());<a name="line.496"></a>
+<span class="sourceLineNo">497</span>    return true;<a name="line.497"></a>
+<span class="sourceLineNo">498</span>  }<a name="line.498"></a>
+<span class="sourceLineNo">499</span><a name="line.499"></a>
+<span class="sourceLineNo">500</span>  private RAMQueueEntry checkRamCache(BlockCacheKey cacheKey) {<a name="line.500"></a>
+<span class="sourceLineNo">501</span>    RAMQueueEntry removedBlock = ramCache.remove(cacheKey);<a name="line.501"></a>
+<span class="sourceLineNo">502</span>    if (removedBlock != null) {<a name="line.502"></a>
+<span class="sourceLineNo">503</span>      this.blockNumber.decrementAndGet();<a name="line.503"></a>
+<span class="sourceLineNo">504</span>      this.heapSize.addAndGet(-1 * removedBlock.getData().heapSize());<a name="line.504"></a>
+<span class="sourceLineNo">505</span>    }<a name="line.505"></a>
+<span class="sourceLineNo">506</span>    return removedBlock;<a name="line.506"></a>
+<span class="sourceLineNo">507</span>  }<a name="line.507"></a>
+<span class="sourceLineNo">508</span><a name="line.508"></a>
+<span class="sourceLineNo">509</span>  public boolean evictBlock(BlockCacheKey cacheKey, boolean deletedBlock) {<a name="line.509"></a>
+<span class="sourceLineNo">510</span>    if (!cacheEnabled) {<a name="line.510"></a>
+<span class="sourceLineNo">511</span>      return false;<a name="line.511"></a>
+<span class="sourceLineNo">512</span>    }<a name="line.512"></a>
+<span class="sourceLineNo">513</span>    RAMQueueEntry removedBlock = checkRamCache(cacheKey);<a name="line.513"></a>
+<span class="sourceLineNo">514</span>    BucketEntry bucketEntry = backingMap.get(cacheKey);<a name="line.514"></a>
+<span class="sourceLineNo">515</span>    if (bucketEntry == null) {<a name="line.515"></a>
+<span class="sourceLineNo">516</span>      if (removedBlock != null) {<a name="line.516"></a>
+<span class="sourceLineNo">517</span>        cacheStats.evicted(0, cacheKey.isPrimary());<a name="line.517"></a>
+<span class="sourceLineNo">518</span>        return true;<a name="line.518"></a>
+<span class="sourceLineNo">519</span>      } else {<a name="line.519"></a>
+<span class="sourceLineNo">520</span>        return false;<a name="line.520"></a>
+<span class="sourceLineNo">521</span>      }<a name="line.521"></a>
+<span class="sourceLineNo">522</span>    }<a name="line.522"></a>
+<span class="sourceLineNo">523</span>    ReentrantReadWriteLock lock = offsetLock.getLock(bucketEntry.offset());<a name="line.523"></a>
+<span class="sourceLineNo">524</span>    try {<a name="line.524"></a>
+<span class="sourceLineNo">525</span>      lock.writeLock().lock();<a name="line.525"></a>
+<span class="sourceLineNo">526</span>      int refCount = bucketEntry.refCount.get();<a name="line.526"></a>
+<span class="sourceLineNo">527</span>      if(refCount == 0) {<a name="line.527"></a>
+<span class="sourceLineNo">528</span>        if (backingMap.remove(cacheKey, bucketEntry)) {<a name="line.528"></a>
+<span class="sourceLineNo">529</span>          blockEvicted(cacheKey, bucketEntry, removedBlock == null);<a name="line.529"></a>
+<span class="sourceLineNo">530</span>        } else {<a name="line.530"></a>
+<span class="sourceLineNo">531</span>          return false;<a name="line.531"></a>
+<span class="sourceLineNo">532</span>        }<a name="line.532"></a>
+<span class="sourceLineNo">533</span>      } else {<a name="line.533"></a>
+<span class="sourceLineNo">534</span>        if(!deletedBlock) {<a name="line.534"></a>
+<span class="sourceLineNo">535</span>          if (LOG.isDebugEnabled()) {<a name="line.535"></a>
+<span class="sourceLineNo">536</span>            LOG.debug("This block " + cacheKey + " is still referred by " + refCount<a name="line.536"></a>
+<span class="sourceLineNo">537</span>                + " readers. Can not be freed now");<a name="line.537"></a>
+<span class="sourceLineNo">538</span>          }<a name="line.538"></a>
+<span class="sourceLineNo">539</span>          return false;<a name="line.539"></a>
+<span class="sourceLineNo">540</span>        } else {<a name="line.540"></a>
+<span class="sourceLineNo">541</span>          if (LOG.isDebugEnabled()) {<a name="line.541"></a>
+<span class="sourceLineNo">542</span>            LOG.debug("This block " + cacheKey + " is still referred by " + refCount<a name="line.542"></a>
+<span class="sourceLineNo">543</span>                + " readers. Can not be freed now. Hence will mark this"<a name="line.543"></a>
+<span class="sourceLineNo">544</span>                + " for evicting at a later point");<a name="line.544"></a>
+<span class="sourceLineNo">545</span>          }<a name="line.545"></a>
+<span class="sourceLineNo">546</span>          bucketEntry.markedForEvict = true;<a name="line.546"></a>
+<span class="sourceLineNo">547</span>        }<a name="line.547"></a>
+<span class="sourceLineNo">548</span>      }<a name="line.548"></a>
+<span class="sourceLineNo">549</span>    } finally {<a name="line.549"></a>
+<span class="sourceLineNo">550</span>      lock.writeLock().unlock();<a name="line.550"></a>
+<span class="sourceLineNo">551</span>    }<a name="line.551"></a>
+<span class="sourceLineNo">552</span>    cacheStats.evicted(bucketEntry.getCachedTime(), cacheKey.isPrimary());<a name="line.552"></a>
+<span class="sourceLineNo">553</span>    return true;<a name="line.553"></a>
+<span class="sourceLineNo">554</span>  }<a name="line.554"></a>
+<span class="sourceLineNo">555</span><a name="line.555"></a>
+<span class="sourceLineNo">556</span>  /*<a name="line.556"></a>
+<span class="sourceLineNo">557</span>   * Statistics thread.  Periodically output cache statistics to the log.<a name="line.557"></a>
+<span class="sourceLineNo">558</span>   */<a name="line.558"></a>
+<span class="sourceLineNo">559</span>  private static class StatisticsThread extends Thread {<a name="line.559"></a>
+<span class="sourceLineNo">560</span>    private final BucketCache bucketCache;<a name="line.560"></a>
+<span class="sourceLineNo">561</span><a name="line.561"></a>
+<span class="sourceLineNo">562</span>    public StatisticsThread(BucketCache bucketCache) {<a name="line.562"></a>
+<span class="sourceLineNo">563</span>      super("BucketCacheStatsThread");<a name="line.563"></a>
+<span class="sourceLineNo">564</span>      setDaemon(true);<a name="line.564"></a>
+<span class="sourceLineNo">565</span>      this.bucketCache = bucketCache;<a name="line.565"></a>
+<span class="sourceLineNo">566</span>    }<a name="line.566"></a>
+<span class="sourceLineNo">567</span><a name="line.567"></a>
+<span class="sourceLineNo">568</span>    @Override<a name="line.568"></a>
+<span class="sourceLineNo">569</span>    public void run() {<a name="line.569"></a>
+<span class="sourceLineNo">570</span>      bucketCache.logStats();<a name="line.570"></a>
+<span class="sourceLineNo">571</span>    }<a name="line.571"></a>
+<span class="sourceLineNo">572</span>  }<a name="line.572"></a>
+<span class="sourceLineNo">573</span><a name="line.573"></a>
+<span class="sourceLineNo">574</span>  public void logStats() {<a name="line.574"></a>
+<span class="sourceLineNo">575</span>    long totalSize = bucketAllocator.getTotalSize();<a name="line.575"></a>
+<span class="sourceLineNo">576</span>    long usedSize = bucketAllocator.getUsedSize();<a name="line.576"></a>
+<span class="sourceLineNo">577</span>    long freeSize = totalSize - usedSize;<a name="line.577"></a>
+<span class="sourceLineNo">578</span>    long cacheSize = getRealCacheSize();<a name="line.578"></a>
+<span class="sourceLineNo">579</span>    LOG.info("failedBlockAdditions=" + cacheStats.getFailedInserts() + ", " +<a name="line.579"></a>
+<span class="sourceLineNo">580</span>        "totalSize=" + StringUtils.byteDesc(totalSize) + ", " +<a name="line.580"></a>
+<span class="sourceLineNo">581</span>        "freeSize=" + StringUtils.byteDesc(freeSize) + ", " +<a name="line.581"></a>
+<span class="sourceLineNo">582</span>        "usedSize=" + StringUtils.byteDesc(usedSize) +", " +<a name="line.582"></a>
+<span class="sourceLineNo">583</span>        "cacheSize=" + StringUtils.byteDesc(cacheSize) +", " +<a name="line.583"></a>
+<span class="sourceLineNo">584</span>        "accesses=" + cacheStats.getRequestCount() + ", " +<a name="line.584"></a>
+<span class="sourceLineNo">585</span>        "hits=" + cacheStats.getHitCount() + ", " +<a name="line.585"></a>
+<span class="sourceLineNo">586</span>        "IOhitsPerSecond=" + cacheStats.getIOHitsPerSecond() + ", " +<a name="line.586"></a>
+<span class="sourceLineNo">587</span>        "IOTimePerHit=" + String.format("%.2f", cacheStats.getIOTimePerHit())+ ", " +<a name="line.587"></a>
+<span class="sourceLineNo">588</span>        "hitRatio=" + (cacheStats.getHitCount() == 0 ? "0," :<a name="line.588"></a>
+<span class="sourceLineNo">589</span>          (StringUtils.formatPercent(cacheStats.getHitRatio(), 2)+ ", ")) +<a name="line.589"></a>
+<span class="sourceLineNo">590</span>        "cachingAccesses=" + cacheStats.getRequestCachingCount() + ", " +<a name="line.590"></a>
+<span class="sourceLineNo">591</span>        "cachingHits=" + cacheStats.getHitCachingCount() + ", " +<a name="line.591"></a>
+<span class="sourceLineNo">592</span>        "cachingHitsRatio=" +(cacheStats.getHitCachingCount() == 0 ? "0," :<a name="line.592"></a>
+<span class="sourceLineNo">593</span>          (StringUtils.formatPercent(cacheStats.getHitCachingRatio(), 2)+ ", ")) +<a name="line.593"></a>
+<span class="sourceLineNo">594</span>        "evictions=" + cacheStats.getEvictionCount() + ", " +<a name="line.594"></a>
+<span class="sourceLineNo">595</span>        "evicted=" + cacheStats.getEvictedCount() + ", " +<a name="line.595"></a>
+<span class="sourceLineNo">596</span>        "evictedPerRun=" + cacheStats.evictedPerEviction());<a name="line.596"></a>
+<span class="sourceLineNo">597</span>    cacheStats.reset();<a name="line.597"></a>
+<span class="sourceLineNo">598</span>  }<a name="line.598"></a>
+<span class="sourceLineNo">599</span><a name="line.599"></a>
+<span class="sourceLineNo">600</span>  public long getRealCacheSize() {<a name="line.600"></a>
+<span class="sourceLineNo">601</span>    return this.realCacheSize.get();<a name="line.601"></a>
+<span class="sourceLineNo">602</span>  }<a name="line.602"></a>
+<span class="sourceLineNo">603</span><a name="line.603"></a>
+<span class="sourceLineNo">604</span>  private long acceptableSize() {<a name="line.604"></a>
+<span class="sourceLineNo">605</span>    return (long) Math.floor(bucketAllocator.getTotalSize() * DEFAULT_ACCEPT_FACTOR);<a name="line.605"></a>
+<span class="sourceLineNo">606</span>  }<a name="line.606"></a>
+<span class="sourceLineNo">607</span><a name="line.607"></a>
+<span class="sourceLineNo">608</span>  private long singleSize() {<a name="line.608"></a>
+<span class="sourceLineNo">609</span>    return (long) Math.floor(bucketAllocator.getTotalSize()<a name="line.609"></a>
+<span class="sourceLineNo">610</span>        * DEFAULT_SINGLE_FACTOR * DEFAULT_MIN_FACTOR);<a name="line.610"></a>
+<span class="sourceLineNo">611</span>  }<a name="line.611"></a>
+<span class="sourceLineNo">612</span><a name="line.612"></a>
+<span class="sourceLineNo">613</span>  private long multiSize() {<a name="line.613"></a>
+<span class="sourceLineNo">614</span>    return (long) Math.floor(bucketAllocator.getTotalSize() * DEFAULT_MULTI_FACTOR<a name="line.614"></a>
+<span class="sourceLineNo">615</span>        * DEFAULT_MIN_FACTOR);<a name="line.615"></a>
+<span class="sourceLineNo">616</span>  }<a name="line.616"></a>
+<span class="sourceLineNo">617</span><a name="line.617"></a>
+<span class="sourceLineNo">618</span>  private long memorySize() {<a name="line.618"></a>
+<span class="sourceLineNo">619</span>    return (long) Math.floor(bucketAllocator.getTotalSize() * DEFAULT_MEMORY_FACTOR<a name="line.619"></a>
+<span class="sourceLineNo">620</span>        * DEFAULT_MIN_FACTOR);<a name="line.620"></a>
+<span class="sourceLineNo">621</span>  }<a name="line.621"></a>
+<span class="sourceLineNo">622</span><a name="line.622"></a>
+<span class="sourceLineNo">623</span>  /**<a name="line.623"></a>
+<span class="sourceLineNo">624</span>   * Free the space if the used size reaches acceptableSize() or one size block<a name="line.624"></a>
+<span class="sourceLineNo">625</span>   * couldn't be allocated. When freeing the space, we use the LRU algorithm and<a name="line.625"></a>
+<span class="sourceLineNo">626</span>   * ensure there must be some blocks evicted<a name="line.626"></a>
+<span class="sourceLineNo">627</span>   * @param why Why we are being called<a name="line.627"></a>
+<span class="sourceLineNo">628</span>   */<a name="line.628"></a>
+<span class="sourceLineNo">629</span>  private void freeSpace(final String why) {<a name="line.629"></a>
+<span class="sourceLineNo">630</span>    // Ensure only one freeSpace progress at a time<a name="line.630"></a>
+<span class="sourceLineNo">631</span>    if (!freeSpaceLock.tryLock()) return;<a name="line.631"></a>
+<span class="sourceLineNo">632</span>    try {<a name="line.632"></a>
+<span class="sourceLineNo">633</span>      freeInProgress = true;<a name="line.633"></a>
+<span class="sourceLineNo">634</span>      long bytesToFreeWithoutExtra = 0;<a name="line.634"></a>
+<span class="sourceLineNo">635</span>      // Calculate free byte for each bucketSizeinfo<a name="line.635"></a>
+<span class="sourceLineNo">636</span>      StringBuffer msgBuffer = LOG.isDebugEnabled()? new StringBuffer(): null;<a name="line.636"></a>
+<span class="sourceLineNo">637</span>      BucketAllocator.IndexStatistics[] stats = bucketAllocator.getIndexStatistics();<a name="line.637"></a>
+<span class="sourceLineNo">638</span>      long[] bytesToFreeForBucket = new long[stats.length];<a name="line.638"></a>
+<span class="sourceLineNo">639</span>      for (int i = 0; i &lt; stats.length; i++) {<a name="line.639"></a>
+<span class="sourceLineNo">640</span>        bytesToFreeForBucket[i] = 0;<a name="line.640"></a>
+<span class="sourceLineNo">641</span>        long freeGoal = (long) Math.floor(stats[i].totalCount() * (1 - DEFAULT_MIN_FACTOR));<a name="line.641"></a>
+<span class="sourceLineNo">642</span>        freeGoal = Math.max(freeGoal, 1);<a name="line.642"></a>
+<span class="sourceLineNo">643</span>        if (stats[i].freeCount() &lt; freeGoal) {<a name="line.643"></a>
+<span class="sourceLineNo">644</span>          bytesToFreeForBucket[i] = stats[i].itemSize() * (freeGoal - stats[i].freeCount());<a name="line.644"></a>
+<span class="sourceLineNo">645</span>          bytesToFreeWithoutExtra += bytesToFreeForBucket[i];<a name="line.645"></a>
+<span class="sourceLineNo">646</span>          if (msgBuffer != null) {<a name="line.646"></a>
+<span class="sourceLineNo">647</span>            msgBuffer.append("Free for bucketSize(" + stats[i].itemSize() + ")="<a name="line.647"></a>
+<span class="sourceLineNo">648</span>              + StringUtils.byteDesc(bytesToFreeForBucket[i]) + ", ");<a name="line.648"></a>
+<span class="sourceLineNo">649</span>          }<a name="line.649"></a>
+<span class="sourceLineNo">650</span>        }<a name="line.650"></a>
 <span class="sourceLineNo">651</span>      }<a name="line.651"></a>
-<span class="sourceLineNo">652</span><a name="line.652"></a>
-<span class="sourceLineNo">653</span>      if (bytesToFreeWithoutExtra &lt;= 0) {<a name="line.653"></a>
-<span class="sourceLineNo">654</span>        return;<a name="line.654"></a>
-<span class="sourceLineNo">655</span>      }<a name="line.655"></a>
-<span class="sourceLineNo">656</span>      long currentSize = bucketAllocator.getUsedSize();<a name="line.656"></a>
-<span class="sourceLineNo">657</span>      long totalSize=bucketAllocator.getTotalSize();<a name="line.657"></a>
-<span class="sourceLineNo">658</span>      if (LOG.isDebugEnabled() &amp;&amp; msgBuffer != null) {<a name="line.658"></a>
-<span class="sourceLineNo">659</span>        LOG.debug("Free started because \"" + why + "\"; " + msgBuffer.toString() +<a name="line.659"></a>
-<span class="sourceLineNo">660</span>          " of current used=" + StringUtils.byteDesc(currentSize) + ", actual cacheSize=" +<a name="line.660"></a>
-<span class="sourceLineNo">661</span>          StringUtils.byteDesc(realCacheSize.get()) + ", total=" + StringUtils.byteDesc(totalSize));<a name="line.661"></a>
-<span class="sourceLineNo">662</span>      }<a name="line.662"></a>
-<span class="sourceLineNo">663</span><a name="line.663"></a>
-<span class="sourceLineNo">664</span>      long bytesToFreeWithExtra = (long) Math.floor(bytesToFreeWithoutExtra<a name="line.664"></a>
-<span class="sourceLineNo">665</span>          * (1 + DEFAULT_EXTRA_FREE_FACTOR));<a name="line.665"></a>
+<span class="sourceLineNo">652</span>      if (msgBuffer != null) {<a name="line.652"></a>
+<span class="sourceLineNo">653</span>        msgBuffer.append("Free for total=" + StringUtils.byteDesc(bytesToFreeWithoutExtra) + ", ");<a name="line.653"></a>
+<span class="sourceLineNo">654</span>      }<a name="line.654"></a>
+<span class="sourceLineNo">655</span><a name="line.655"></a>
+<span class="sourceLineNo">656</span>      if (bytesToFreeWithoutExtra &lt;= 0) {<a name="line.656"></a>
+<span class="sourceLineNo">657</span>        return;<a name="line.657"></a>
+<span class="sourceLineNo">658</span>      }<a name="line.658"></a>
+<span class="sourceLineNo">659</span>      long currentSize = bucketAllocator.getUsedSize();<a name="line.659"></a>
+<span class="sourceLineNo">660</span>      long totalSize=bucketAllocator.getTotalSize();<a name="line.660"></a>
+<span class="sourceLineNo">661</span>      if (LOG.isDebugEnabled() &amp;&amp; msgBuffer != null) {<a name="line.661"></a>
+<span class="sourceLineNo">662</span>        LOG.debug("Free started because \"" + why + "\"; " + msgBuffer.toString() +<a name="line.662"></a>
+<span class="sourceLineNo">663</span>          " of current used=" + StringUtils.byteDesc(currentSize) + ", actual cacheSize=" +<a name="line.663"></a>
+<span class="sourceLineNo">664</span>          StringUtils.byteDesc(realCacheSize.get()) + ", total=" + StringUtils.byteDesc(totalSize));<a name="line.664"></a>
+<span class="sourceLineNo">665</span>      }<a name="line.665"></a>
 <span class="sourceLineNo">666</span><a name="line.666"></a>
-<span class="sourceLineNo">667</span>      // Instantiate priority buckets<a name="line.667"></a>
-<span class="sourceLineNo">668</span>      BucketEntryGroup bucketSingle = new BucketEntryGroup(bytesToFreeWithExtra,<a name="line.668"></a>
-<span class="sourceLineNo">669</span>          blockSize, singleSize());<a name="line.669"></a>
-<span class="sourceLineNo">670</span>      BucketEntryGroup bucketMulti = new BucketEntryGroup(bytesToFreeWithExtra,<a name="line.670"></a>
-<span class="sourceLineNo">671</span>          blockSize, multiSize());<a name="line.671"></a>
-<span class="sourceLineNo">672</span>      BucketEntryGroup bucketMemory = new BucketEntryGroup(bytesToFreeWithExtra,<a name="line.672"></a>
-<span class="sourceLineNo">673</span>          blockSize, memorySize());<a name="line.673"></a>
-<span class="sourceLineNo">674</span><a name="line.674"></a>
-<span class="sourceLineNo">675</span>      // Scan entire map putting bucket entry into appropriate bucket entry<a name="line.675"></a>
-<span class="sourceLineNo">676</span>      // group<a name="line.676"></a>
-<span class="sourceLineNo">677</span>      for (Map.Entry&lt;BlockCacheKey, BucketEntry&gt; bucketEntryWithKey : backingMap.entrySet()) {<a name="line.677"></a>
-<span class="sourceLineNo">678</span>        switch (bucketEntryWithKey.getValue().getPriority()) {<a name="line.678"></a>
-<span class="sourceLineNo">679</span>          case SINGLE: {<a name="line.679"></a>
-<span class="sourceLineNo">680</span>            bucketSingle.add(bucketEntryWithKey);<a name="line.680"></a>
-<span class="sourceLineNo">681</span>            break;<a name="line.681"></a>
-<span class="sourceLineNo">682</span>          }<a name="line.682"></a>
-<span class="sourceLineNo">683</span>          case MULTI: {<a name="line.683"></a>
-<span class="sourceLineNo">684</span>            bucketMulti.add(bucketEntryWithKey);<a name="line.684"></a>
-<span class="sourceLineNo">685</span>            break;<a name="line.685"></a>
-<span class="sourceLineNo">686</span>          }<a name="line.686"></a>
-<span class="sourceLineNo">687</span>          case MEMORY: {<a name="line.687"></a>
-<span class="sourceLineNo">688</span>            bucketMemory.add(bucketEntryWithKey);<a name="line.688"></a>
-<span class="sourceLineNo">689</span>            break;<a name="line.689"></a>
-<span class="sourceLineNo">690</span>          }<a name="line.690"></a>
-<span class="sourceLineNo">691</span>        }<a name="line.691"></a>
-<span class="sourceLineNo">692</span>      }<a name="line.692"></a>
-<span class="sourceLineNo">693</span><a name="line.693"></a>
-<span class="sourceLineNo">694</span>      PriorityQueue&lt;BucketEntryGroup&gt; bucketQueue = new PriorityQueue&lt;BucketEntryGroup&gt;(3);<a name="line.694"></a>
-<span class="sourceLineNo">695</span><a name="line.695"></a>
-<span class="sourceLineNo">696</span>      bucketQueue.add(bucketSingle);<a name="line.696"></a>
-<span class="sourceLineNo">697</span>      bucketQueue.add(bucketMulti);<a name="line.697"></a>
-<span class="sourceLineNo">698</span>      bucketQueue.add(bucketMemory);<a name="line.698"></a>
-<span class="sourceLineNo">699</span><a name="line.699"></a>
-<span class="sourceLineNo">700</span>      int remainingBuckets = 3;<a name="line.700"></a>
-<span class="sourceLineNo">701</span>      long bytesFreed = 0;<a name="line.701"></a>
+<span class="sourceLineNo">667</span>      long bytesToFreeWithExtra = (long) Math.floor(bytesToFreeWithoutExtra<a name="line.667"></a>
+<span class="sourceLineNo">668</span>          * (1 + DEFAULT_EXTRA_FREE_FACTOR));<a name="line.668"></a>
+<span class="sourceLineNo">669</span><a name="line.669"></a>
+<span class="sourceLineNo">670</span>      // Instantiate priority buckets<a name="line.670"></a>
+<span class="sourceLineNo">671</span>      BucketEntryGroup bucketSingle = new BucketEntryGroup(bytesToFreeWithExtra,<a name="line.671"></a>
+<span class="sourceLineNo">672</span>          blockSize, singleSize());<a name="line.672"></a>
+<span class="sourceLineNo">673</span>      BucketEntryGroup bucketMulti = new BucketEntryGroup(bytesToFreeWithExtra,<a name="line.673"></a>
+<span class="sourceLineNo">674</span>          blockSize, multiSize());<a name="line.674"></a>
+<span class="sourceLineNo">675</span>      BucketEntryGroup bucketMemory = new BucketEntryGroup(bytesToFreeWithExtra,<a name="line.675"></a>
+<span class="sourceLineNo">676</span>          blockSize, memorySize());<a name="line.676"></a>
+<span class="sourceLineNo">677</span><a name="line.677"></a>
+<span class="sourceLineNo">678</span>      // Scan entire map putting bucket entry into appropriate bucket entry<a name="line.678"></a>
+<span class="sourceLineNo">679</span>      // group<a name="line.679"></a>
+<span class="sourceLineNo">680</span>      for (Map.Entry&lt;BlockCacheKey, BucketEntry&gt; bucketEntryWithKey : backingMap.entrySet()) {<a name="line.680"></a>
+<span class="sourceLineNo">681</span>        switch (bucketEntryWithKey.getValue().getPriority()) {<a name="line.681"></a>
+<span class="sourceLineNo">682</span>          case SINGLE: {<a name="line.682"></a>
+<span class="sourceLineNo">683</span>            bucketSingle.add(bucketEntryWithKey);<a name="line.683"></a>
+<span class="sourceLineNo">684</span>            break;<a name="line.684"></a>
+<span class="sourceLineNo">685</span>          }<a name="line.685"></a>
+<span class="sourceLineNo">686</span>          case MULTI: {<a name="line.686"></a>
+<span class="sourceLineNo">687</span>            bucketMulti.add(bucketEntryWithKey);<a name="line.687"></a>
+<span class="sourceLineNo">688</span>            break;<a name="line.688"></a>
+<span class="sourceLineNo">689</span>          }<a name="line.689"></a>
+<span class="sourceLineNo">690</span>          case MEMORY: {<a name="line.690"></a>
+<span class="sourceLineNo">691</span>            bucketMemory.add(bucketEntryWithKey);<a name="line.691"></a>
+<span class="sourceLineNo">692</span>            break;<a name="line.692"></a>
+<span class="sourceLineNo">693</span>          }<a name="line.693"></a>
+<span class="sourceLineNo">694</span>        }<a name="line.694"></a>
+<span class="sourceLineNo">695</span>      }<a name="line.695"></a>
+<span class="sourceLineNo">696</span><a name="line.696"></a>
+<span class="sourceLineNo">697</span>      PriorityQueue&lt;BucketEntryGroup&gt; bucketQueue = new PriorityQueue&lt;BucketEntryGroup&gt;(3);<a name="line.697"></a>
+<span class="sourceLineNo">698</span><a name="line.698"></a>
+<span class="sourceLineNo">699</span>      bucketQueue.add(bucketSingle);<a name="line.699"></a>
+<span class="sourceLineNo">700</span>      bucketQueue.add(bucketMulti);<a name="line.700"></a>
+<span class="sourceLineNo">701</span>      bucketQueue.add(bucketMemory);<a name="line.701"></a>
 <span class="sourceLineNo">702</span><a name="line.702"></a>
-<span class="sourceLineNo">703</span>      BucketEntryGroup bucketGroup;<a name="line.703"></a>
-<span class="sourceLineNo">704</span>      while ((bucketGroup = bucketQueue.poll()) != null) {<a name="line.704"></a>
-<span class="sourceLineNo">705</span>        long overflow = bucketGroup.overflow();<a name="line.705"></a>
-<span class="sourceLineNo">706</span>        if (overflow &gt; 0) {<a name="line.706"></a>
-<span class="sourceLineNo">707</span>          long bucketBytesToFree = Math.min(overflow,<a name="line.707"></a>
-<span class="sourceLineNo">708</span>              (bytesToFreeWithoutExtra - bytesFreed) / remainingBuckets);<a name="line.708"></a>
-<span class="sourceLineNo">709</span>          bytesFreed += bucketGroup.free(bucketBytesToFree);<a name="line.709"></a>
-<span class="sourceLineNo">710</span>        }<a name="line.710"></a>
-<span class="sourceLineNo">711</span>        remainingBuckets--;<a name="line.711"></a>
-<span class="sourceLineNo">712</span>      }<a name="line.712"></a>
-<span class="sourceLineNo">713</span><a name="line.713"></a>
-<span class="sourceLineNo">714</span>      /**<a name="line.714"></a>
-<span class="sourceLineNo">715</span>       * Check whether need extra free because some bucketSizeinfo still needs<a name="line.715"></a>
-<span class="sourceLineNo">716</span>       * free space<a name="line.716"></a>
-<span class="sourceLineNo">717</span>       */<a name="line.717"></a>
-<span class="sourceLineNo">718</span>      stats = bucketAllocator.getIndexStatistics();<a name="line.718"></a>
-<span class="sourceLineNo">719</span>      boolean needFreeForExtra = false;<a name="line.719"></a>
-<span class="sourceLineNo">720</span>      for (int i = 0; i &lt; stats.length; i++) {<a name="line.720"></a>
-<span class="sourceLineNo">721</span>        long freeGoal = (long) Math.floor(stats[i].totalCount() * (1 - DEFAULT_MIN_FACTOR));<a name="line.721"></a>
-<span class="sourceLineNo">722</span>        freeGoal = Math.max(freeGoal, 1);<a name="line.722"></a>
-<span class="sourceLineNo">723</span>        if (stats[i].freeCount() &lt; freeGoal) {<a name="line.723"></a>
-<span class="sourceLineNo">724</span>          needFreeForExtra = true;<a name="line.724"></a>
-<span class="sourceLineNo">725</span>          break;<a name="line.725"></a>
-<span class="sourceLineNo">726</span>        }<a name="line.726"></a>
-<span class="sourceLineNo">727</span>      }<a name="line.727"></a>
-<span class="sourceLineNo">728</span><a name="line.728"></a>
-<span class="sourceLineNo">729</span>      if (needFreeForExtra) {<a name="line.729"></a>
-<span class="sourceLineNo">730</span>        bucketQueue.clear();<a name="line.730"></a>
-<span class="sourceLineNo">731</span>        remainingBuckets = 2;<a name="line.731"></a>
-<span class="sourceLineNo">732</span><a name="line.732"></a>
-<span class="sourceLineNo">733</span>        bucketQueue.add(bucketSingle);<a name="line.733"></a>
-<span class="sourceLineNo">734</span>        bucketQueue.add(bucketMulti);<a name="line.734"></a>
+<span class="sourceLineNo">703</span>      int remainingBuckets = 3;<a name="line.703"></a>
+<span class="sourceLineNo">704</span>      long bytesFreed = 0;<a name="line.704"></a>
+<span class="sourceLineNo">705</span><a name="line.705"></a>
+<span class="sourceLineNo">706</span>      BucketEntryGroup bucketGroup;<a name="line.706"></a>
+<span class="sourceLineNo">707</span>      while ((bucketGroup = bucketQueue.poll()) != null) {<a name="line.707"></a>
+<span class="sourceLineNo">708</span>        long overflow = bucketGroup.overflow();<a name="line.708"></a>
+<span class="sourceLineNo">709</span>        if (overflow &gt; 0) {<a name="line.709"></a>
+<span class="sourceLineNo">710</span>          long bucketBytesToFree = Math.min(overflow,<a name="line.710"></a>
+<span class="sourceLineNo">711</span>              (bytesToFreeWithoutExtra - bytesFreed) / remainingBuckets);<a name="line.711"></a>
+<span class="sourceLineNo">712</span>          bytesFreed += bucketGroup.free(bucketBytesToFree);<a name="line.712"></a>
+<span class="sourceLineNo">713</span>        }<a name="line.713"></a>
+<span class="sourceLineNo">714</span>        remainingBuckets--;<a name="line.714"></a>
+<span class="sourceLineNo">715</span>      }<a name="line.715"></a>
+<span class="sourceLineNo">716</span><a name="line.716"></a>
+<span class="sourceLineNo">717</span>      /**<a name="line.717"></a>
+<span class="sourceLineNo">718</span>       * Check whether need extra free because some bucketSizeinfo still needs<a name="line.718"></a>
+<span class="sourceLineNo">719</span>       * free space<a name="line.719"></a>
+<span class="sourceLineNo">720</span>       */<a name="line.720"></a>
+<span class="sourceLineNo">721</span>      stats = bucketAllocator.getIndexStatistics();<a name="line.721"></a>
+<span class="sourceLineNo">722</span>      boolean needFreeForExtra = false;<a name="line.722"></a>
+<span class="sourceLineNo">723</span>      for (int i = 0; i &lt; stats.length; i++) {<a name="line.723"></a>
+<span class="sourceLineNo">724</span>        long freeGoal = (long) Math.floor(stats[i].totalCount() * (1 - DEFAULT_MIN_FACTOR));<a name="line.724"></a>
+<span class="sourceLineNo">725</span>        freeGoal = Math.max(freeGoal, 1);<a name="line.725"></a>
+<span class="sourceLineNo">726</span>        if (stats[i].freeCount() &lt; freeGoal) {<a name="line.726"></a>
+<span class="sourceLineNo">727</span>          needFreeForExtra = true;<a name="line.727"></a>
+<span class="sourceLineNo">728</span>          break;<a name="line.728"></a>
+<span class="sourceLineNo">729</span>        }<a name="line.729"></a>
+<span class="sourceLineNo">730</span>      }<a name="line.730"></a>
+<span class="sourceLineNo">731</span><a name="line.731"></a>
+<span class="sourceLineNo">732</span>      if (needFreeForExtra) {<a name="line.732"></a>
+<span class="sourceLineNo">733</span>        bucketQueue.clear();<a name="line.733"></a>
+<span class="sourceLineNo">734</span>        remainingBuckets = 2;<a name="line.734"></a>
 <span class="sourceLineNo">735</span><a name="line.735"></a>
-<span class="sourceLineNo">736</span>        while ((bucketGroup = bucketQueue.poll()) != null) {<a name="line.736"></a>
-<span class="sourceLineNo">737</span>          long bucketBytesToFree = (bytesToFreeWithExtra - bytesFreed) / remainingBuckets;<a name="line.737"></a>
-<span class="sourceLineNo">738</span>          bytesFreed += bucketGroup.free(bucketBytesToFree);<a name="line.738"></a>
-<span class="sourceLineNo">739</span>          remainingBuckets--;<a name="line.739"></a>
-<span class="sourceLineNo">740</span>        }<a name="line.740"></a>
-<span class="sourceLineNo">741</span>      }<a name="line.741"></a>
-<span class="sourceLineNo">742</span><a name="line.742"></a>
-<span class="sourceLineNo">743</span>      if (LOG.isDebugEnabled()) {<a name="line.743"></a>
-<span class="sourceLineNo">744</span>        long single = bucketSingle.totalSize();<a name="line.744"></a>
-<span class="sourceLineNo">745</span>        long multi = bucketMulti.totalSize();<a name="line.745"></a>
-<span class="sourceLineNo">746</span>        long memory = bucketMemory.totalSize();<a name="line.746"></a>
-<span class="sourceLineNo">747</span>        if (LOG.isDebugEnabled()) {<a name="line.747"></a>
-<span class="sourceLineNo">748</span>          LOG.debug("Bucket cache free space completed; " + "freed="<a name="line.748"></a>
-<span class="sourceLineNo">749</span>            + StringUtils.byteDesc(bytesFreed) + ", " + "total="<a name="line.749"></a>
-<span class="sourceLineNo">750</span>            + StringUtils.byteDesc(totalSize) + ", " + "single="<a name="line.750"></a>
-<span class="sourceLineNo">751</span>            + StringUtils.byteDesc(single) + ", " + "multi="<a name="line.751"></a>
-<span class="sourceLineNo">752</span>            + StringUtils.byteDesc(multi) + ", " + "memory="<a name="line.752"></a>
-<span class="sourceLineNo">753</span>            + StringUtils.byteDesc(memory));<a name="line.753"></a>
-<span class="sourceLineNo">754</span>        }<a name="line.754"></a>
-<span class="sourceLineNo">755</span>      }<a name="line.755"></a>
-<span class="sourceLineNo">756</span><a name="line.756"></a>
-<span class="sourceLineNo">757</span>    } catch (Throwable t) {<a name="line.757"></a>
-<span class="sourceLineNo">758</span>      LOG.warn("Failed freeing space", t);<a name="line.758"></a>
-<span class="sourceLineNo">759</span>    } finally {<a name="line.759"></a>
-<span class="sourceLineNo">760</span>      cacheStats.evict();<a name="line.760"></a>
-<span class="sourceLineNo">761</span>      freeInProgress = false;<a name="line.761"></a>
-<span class="sourceLineNo">762</span>      freeSpaceLock.unlock();<a name="line.762"></a>
-<span class="sourceLineNo">763</span>    }<a name="line.763"></a>
-<span class="sourceLineNo">764</span>  }<a name="line.764"></a>
-<span class="sourceLineNo">765</span><a name="line.765"></a>
-<span class="sourceLineNo">766</span>  // This handles flushing the RAM cache to IOEngine.<a name="line.766"></a>
-<span class="sourceLineNo">767</span>  @VisibleForTesting<a name="line.767"></a>
-<span class="sourceLineNo">768</span>  class WriterThread extends HasThread {<a name="line.768"></a>
-<span class="sourceLineNo">769</span>    private final BlockingQueue&lt;RAMQueueEntry&gt; inputQueue;<a name="line.769"></a>
-<span class="sourceLineNo">770</span>    private volatile boolean writerEnabled = true;<a name="line.770"></a>
-<span class="sourceLineNo">771</span><a name="line.771"></a>
-<span class="sourceLineNo">772</span>    WriterThread(BlockingQueue&lt;RAMQueueEntry&gt; queue) {<a name="line.772"></a>
-<span class="sourceLineNo">773</span>      this.inputQueue = queue;<a name="line.773"></a>
-<span class="sourceLineNo">774</span>    }<a name="line.774"></a>
-<span class="sourceLineNo">775</span><a name="line.775"></a>
-<span class="sourceLineNo">776</span>    // Used for test<a name="line.776"></a>
-<span class="sourceLineNo">777</span>    @VisibleForTesting<a name="line.777"></a>
-<span class="sourceLineNo">778</span>    void disableWriter() {<a name="line.778"></a>
-<span class="sourceLineNo">779</span>      this.writerEnabled = false;<a name="line.779"></a>
-<span class="sourceLineNo">780</span>    }<a name="line.780"></a>
-<span class="sourceLineNo">781</span><a name="line.781"></a>
-<span class="sourceLineNo">782</span>    public void run() {<a name="line.782"></a>
-<span class="sourceLineNo">783</span>      List&lt;RAMQueueEntry&gt; entries = new ArrayList&lt;RAMQueueEntry&gt;();<a name="line.783"></a>
-<span class="sourceLineNo">784</span>      try {<a name="line.784"></a>
-<span class="sourceLineNo">785</span>        while (cacheEnabled &amp;&amp; writerEnabled) {<a name="line.785"></a>
-<span class="sourceLineNo">786</span>          try {<a name="line.786"></a>
-<span class="sourceLineNo">787</span>            try {<a name="line.787"></a>
-<span class="sourceLineNo">788</span>              // Blocks<a name="line.788"></a>
-<span class="sourceLineNo">789</span>              entries = getRAMQueueEntries(inputQueue, entries);<a name="line.789"></a>
-<span class="sourceLineNo">790</span>            } catch (InterruptedException ie) {<a name="line.790"></a>
-<span class="sourceLineNo">791</span>              if (!cacheEnabled) break;<a name="line.791"></a>
-<span class="sourceLineNo">792</span>            }<a name="line.792"></a>
-<span class="sourceLineNo">793</span>            doDrain(entries);<a name="line.793"></a>
-<span class="sourceLineNo">794</span>          } catch (Exception ioe) {<a name="line.794"></a>
-<span class="sourceLineNo">795</span>            LOG.error("WriterThread encountered error", ioe);<a name="line.795"></a>
-<span class="sourceLineNo">796</span>          }<a name="line.796"></a>
-<span class="sourceLineNo">797</span>        }<a 

<TRUNCATED>