The hightlighter seems to have specific code to handle CommonTermsQuery but it does not work:
```
org.elasticsearch.search.fetch.FetchPhaseExecutionException: [cirrustestwiki_content_1438190225][0]: query[filtered(((all.plain:prefix | all:prefix^0.5) all_near_match:prefix)~1)->cache(_type:page)],from[0],size[20]: Fetch Failed [Failed to highlight field [title]]
at org.elasticsearch.search.highlight.ExperimentalHighlighter.highlight(ExperimentalHighlighter.java:92)
at org.elasticsearch.search.highlight.HighlightPhase.hitExecute(HighlightPhase.java:133)
at org.elasticsearch.search.fetch.FetchPhase.execute(FetchPhase.java:194)
at org.elasticsearch.search.SearchService.executeFetchPhase(SearchService.java:516)
at org.elasticsearch.search.action.SearchServiceTransportAction$17.call(SearchServiceTransportAction.java:452)
at org.elasticsearch.search.action.SearchServiceTransportAction$17.call(SearchServiceTransportAction.java:449)
at org.elasticsearch.search.action.SearchServiceTransportAction$23.run(SearchServiceTransportAction.java:559)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ClassCastException: org.apache.lucene.search.TermQuery cannot be cast to org.apache.lucene.search.BooleanQuery
at org.wikimedia.highlighter.experimental.lucene.QueryFlattener.flattenQuery(QueryFlattener.java:401)
at org.wikimedia.highlighter.experimental.lucene.QueryFlattener.flatten(QueryFlattener.java:145)
at org.wikimedia.highlighter.experimental.lucene.QueryFlattener.flattenQuery(QueryFlattener.java:214)
at org.wikimedia.highlighter.experimental.lucene.QueryFlattener.flatten(QueryFlattener.java:123)
at org.wikimedia.highlighter.experimental.lucene.QueryFlattener.flatten(QueryFlattener.java:103)
at org.wikimedia.highlighter.experimental.lucene.hit.weight.BasicQueryWeigher.<init>(BasicQueryWeigher.java:46)
at org.elasticsearch.search.highlight.ExperimentalHighlighter$HighlightExecutionContext.ensureWeigher(ExperimentalHighlighter.java:286)
at org.elasticsearch.search.highlight.ExperimentalHighlighter$HighlightExecutionContext.highlight(ExperimentalHighlighter.java:177)
at org.elasticsearch.search.highlight.ExperimentalHighlighter.highlight(ExperimentalHighlighter.java:86)
... 9 more
```