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java.lang.OutOfMemoryError: GC overhead limit exceeded	at java.util.PriorityQueue.(PriorityQueue.java:168)	at io.druid.query.topn.TopNNumericResultBuilder.(TopNNumericResultBuilder.java:110)	at io.druid.query.topn.NumericTopNMetricSpec.getResultBuilder(NumericTopNMetricSpec.java:128)	at io.druid.query.topn.TopNBinaryFn.apply(TopNBinaryFn.java:126)	at io.druid.query.topn.TopNBinaryFn.apply(TopNBinaryFn.java:39)	at io.druid.common.guava.CombiningSequence$CombiningYieldingAccumulator.accumulate(CombiningSequence.java:212)	at com.metamx.common.guava.BaseSequence.makeYielder(BaseSequence.java:104)	at com.metamx.common.guava.BaseSequence.toYielder(BaseSequence.java:81)	at io.druid.common.guava.CombiningSequence.toYielder(CombiningSequence.java:78)	at com.metamx.common.guava.MappedSequence.toYielder(MappedSequence.java:46)	at io.druid.query.CPUTimeMetricQueryRunner$1.toYielder(CPUTimeMetricQueryRunner.java:93)	at com.metamx.common.guava.Sequences$1.toYielder(Sequences.java:98)	at io.druid.server.QueryResource.doPost(QueryResource.java:224)	at sun.reflect.GeneratedMethodAccessor54.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:498)	at com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)	at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$ResponseOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:205)	at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)	at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:302)	at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108)	at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)	at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)	at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1542)	at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1473)	at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1419)	at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1409)	at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:409)	at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:558)	at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:733)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)	at com.google.inject.servlet.ServletDefinition.doServiceImpl(ServletDefinition.java:278)