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Merge pull request #13032 from jpountz/fix/match_all_caching 

Never cache match_all queries.
This commit is contained in:
Adrien Grand 2015-08-21 09:38:50 +02:00
parent c54a4c4f89 f3265095ab
commit d99b5c8bc6
1 changed files with 45 additions and 3 deletions
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48
core/src/main/java/org/elasticsearch/index/shard/IndexShard.java
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@ -21,8 +21,15 @@ package org.elasticsearch.index.shard;
import com.google.common.base.Charsets;
import com.google.common.base.Preconditions;
import org.apache.lucene.codecs.PostingsFormat;
import org.apache.lucene.index.CheckIndex;
import org.apache.lucene.index.LeafReaderContext;
import org.apache.lucene.search.BooleanQuery;
import org.apache.lucene.search.DisjunctionMaxQuery;
import org.apache.lucene.search.MatchAllDocsQuery;
import org.apache.lucene.search.MatchNoDocsQuery;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.QueryCachingPolicy;
import org.apache.lucene.search.UsageTrackingQueryCachingPolicy;
import org.apache.lucene.store.AlreadyClosedException;
@ -162,8 +169,8 @@ public class IndexShard extends AbstractIndexShardComponent {
private TimeValue refreshInterval;
private volatile ScheduledFuture refreshScheduledFuture;
private volatile ScheduledFuture mergeScheduleFuture;
private volatile ScheduledFuture<?> refreshScheduledFuture;
private volatile ScheduledFuture<?> mergeScheduleFuture;
protected volatile ShardRouting shardRouting;
protected volatile IndexShardState state;
protected final AtomicReference<Engine> currentEngineReference = new AtomicReference<>();
@ -252,7 +259,42 @@ public class IndexShard extends AbstractIndexShardComponent {
if (indexSettings.getAsBoolean(IndexCacheModule.QUERY_CACHE_EVERYTHING, false)) {
cachingPolicy = QueryCachingPolicy.ALWAYS_CACHE;
} else {
cachingPolicy = new UsageTrackingQueryCachingPolicy();
assert Version.CURRENT.luceneVersion == org.apache.lucene.util.Version.LUCENE_5_2_1;
// TODO: remove this hack in Lucene 5.4, use UsageTrackingQueryCachingPolicy directly
// See https://issues.apache.org/jira/browse/LUCENE-6748
// cachingPolicy = new UsageTrackingQueryCachingPolicy();
final QueryCachingPolicy wrapped = new UsageTrackingQueryCachingPolicy();
cachingPolicy = new QueryCachingPolicy() {
@Override
public boolean shouldCache(Query query, LeafReaderContext context) throws IOException {
if (query instanceof MatchAllDocsQuery
// MatchNoDocsQuery currently rewrites to a BooleanQuery,
// but who knows, it might get its own Weight one day
|| query instanceof MatchNoDocsQuery) {
return false;
}
if (query instanceof BooleanQuery) {
BooleanQuery bq = (BooleanQuery) query;
if (bq.clauses().isEmpty()) {
return false;
}
}
if (query instanceof DisjunctionMaxQuery) {
DisjunctionMaxQuery dmq = (DisjunctionMaxQuery) query;
if (dmq.getDisjuncts().isEmpty()) {
return false;
}
}
return wrapped.shouldCache(query, context);
}
@Override
public void onUse(Query query) {
wrapped.onUse(query);
}
};
}
this.engineConfig = newEngineConfig(translogConfig, cachingPolicy);
this.indexShardOperationCounter = new IndexShardOperationCounter(logger, shardId);