Internal: Upgrade Guava to 18.0.

17.0 and earlier versions were affected by the following bug
https://code.google.com/p/guava-libraries/issues/detail?id=1761
which caused caches that are configured with weights that are greater than
32GB to actually be unbounded. This is now fixed.

Relates to #6268
Close #7593

pom.xml

@@ -191,7 +191,7 @@
         <dependency>
             <groupId>com.google.guava</groupId>
             <artifactId>guava</artifactId>
-            <version>17.0</version>
+            <version>18.0</version>
             <scope>compile</scope>
         </dependency>
 

src/main/java/org/elasticsearch/common/unit/ByteSizeValue.java

@@ -34,14 +34,6 @@
  *
  */
 public class ByteSizeValue implements Serializable, Streamable {
-    /**
-     * Largest size possible for Guava caches to prevent overflow. Guava's
-     * caches use integers to track weight per segment and we always 16 segments
-     * so caches of 32GB would always overflow that integer and they'd never be
-     * evicted by size. We set this to 31.9GB leaving 100MB of headroom to
-     * prevent overflow.
-     */
-    public static final ByteSizeValue MAX_GUAVA_CACHE_SIZE = new ByteSizeValue(32 * ByteSizeUnit.C3 - 100 * ByteSizeUnit.C2);
 
     private long size;
 

src/main/java/org/elasticsearch/indices/cache/filter/IndicesFilterCache.java

@@ -119,16 +119,7 @@ private void buildCache() {
     }
 
     private void computeSizeInBytes() {
-        long sizeInBytes = MemorySizeValue.parseBytesSizeValueOrHeapRatio(size).bytes();
-        if (sizeInBytes > ByteSizeValue.MAX_GUAVA_CACHE_SIZE.bytes()) {
-            logger.warn("reducing requested filter cache size of [{}] to the maximum allowed size of [{}]", new ByteSizeValue(sizeInBytes),
-                    ByteSizeValue.MAX_GUAVA_CACHE_SIZE);
-            sizeInBytes = ByteSizeValue.MAX_GUAVA_CACHE_SIZE.bytes();
-            // Even though it feels wrong for size and sizeInBytes to get out of
-            // sync we don't update size here because it might cause the cache
-            // to be rebuilt every time new settings are applied.
-        }
-        this.sizeInBytes = sizeInBytes;
+        this.sizeInBytes = MemorySizeValue.parseBytesSizeValueOrHeapRatio(size).bytes();
     }
 
     public void addReaderKeyToClean(Object readerKey) {

src/main/java/org/elasticsearch/indices/cache/query/IndicesQueryCache.java

@@ -38,7 +38,6 @@
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.StreamOutput;
 import org.elasticsearch.common.settings.Settings;
-import org.elasticsearch.common.unit.ByteSizeValue;
 import org.elasticsearch.common.unit.MemorySizeValue;
 import org.elasticsearch.common.unit.TimeValue;
 import org.elasticsearch.common.util.concurrent.ConcurrentCollections;
@@ -118,13 +117,6 @@ public IndicesQueryCache(Settings settings, ClusterService clusterService, Threa
 
     private void buildCache() {
         long sizeInBytes = MemorySizeValue.parseBytesSizeValueOrHeapRatio(size).bytes();
-        if (sizeInBytes > ByteSizeValue.MAX_GUAVA_CACHE_SIZE.bytes()) {
-            logger.warn("reducing requested query cache size of [{}] to the maximum allowed size of [{}]", new ByteSizeValue(sizeInBytes), ByteSizeValue.MAX_GUAVA_CACHE_SIZE);
-            sizeInBytes = ByteSizeValue.MAX_GUAVA_CACHE_SIZE.bytes();
-            // Even though it feels wrong for size and sizeInBytes to get out of
-            // sync we don't update size here because it might cause the cache
-            // to be rebuilt every time new settings are applied.
-        }
 
         CacheBuilder<Key, BytesReference> cacheBuilder = CacheBuilder.newBuilder()
                 .maximumWeight(sizeInBytes).weigher(new QueryCacheWeigher()).removalListener(this);

src/main/java/org/elasticsearch/indices/fielddata/cache/IndicesFieldDataCache.java

@@ -65,14 +65,8 @@ public IndicesFieldDataCache(Settings settings, IndicesFieldDataCacheListener in
         super(settings);
         this.threadPool = threadPool;
         this.indicesFieldDataCacheListener = indicesFieldDataCacheListener;
-        String size = componentSettings.get("size", "-1");
-        long sizeInBytes = componentSettings.getAsMemory("size", "-1").bytes();
-        if (sizeInBytes > ByteSizeValue.MAX_GUAVA_CACHE_SIZE.bytes()) {
-            logger.warn("reducing requested field data cache size of [{}] to the maximum allowed size of [{}]", new ByteSizeValue(sizeInBytes),
-                    ByteSizeValue.MAX_GUAVA_CACHE_SIZE);
-            sizeInBytes = ByteSizeValue.MAX_GUAVA_CACHE_SIZE.bytes();
-            size = ByteSizeValue.MAX_GUAVA_CACHE_SIZE.toString();
-        }
+        final String size = componentSettings.get("size", "-1");
+        final long sizeInBytes = componentSettings.getAsMemory("size", "-1").bytes();
         final TimeValue expire = componentSettings.getAsTime("expire", null);
         CacheBuilder<Key, Accountable> cacheBuilder = CacheBuilder.newBuilder()
                 .removalListener(this);