# NPE in ContextIndexSearcher **URL:** \ **Category:** Elasticsearch\ **Created:** [May 17, 2011, 7:19am UTC](https://discuss.elastic.co/t/npe-in-contextindexsearcher/4420 "2011-05-17T07:19:19Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![dpilato](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dpilato/32/2449_2.png) [@dpilato](https://discuss.elastic.co/u/dpilato)\ **Post date:** [May 17, 2011, 7:19am UTC](https://discuss.elastic.co/t/npe-in-contextindexsearcher/4420/1 "2011-05-17T07:19:19Z")
Hi, I'm using the ElasticSearch FrontEnd client ( [https://github.com/mobz/elasticsearch-head](https://github.com/mobz/elasticsearch-head) ). The last version in master... I use it with ES 0.16.1. When I try to search (simple match\_all query), I get a NPE. Here is what ESFrontEnd is sending to ES : { query: { bool: { must: [ { match\_all: { } } ] must\_not: [] should: [] } } from: 0 size: 50 sort: [] facets: { } } In ES logs, I get : [2011-05-17 09:08:40,592][DEBUG][action.search.type] [The Entity] [dau][4], node[6bzzlBiuTVu52IhXYwE4Qw], [P], s[STARTED]: Failed to execute [org.elasticsearch.action.search.SearchRequest@1b6ba28] java.lang.NullPointerException at org.elasticsearch.search.internal.ContextIndexSearcher.removeCollectors(ContextIndexSearcher.java:81) at org.elasticsearch.search.facet.FacetPhase.execute(FacetPhase.java:72) at org.elasticsearch.search.query.QueryPhase.execute(QueryPhase.java:220) at org.elasticsearch.search.SearchService.executeQueryPhase(SearchService.java:222) at org.elasticsearch.search.action.SearchServiceTransportAction.sendExecuteQuery(SearchServiceTransportAction.java:134) at org.elasticsearch.action.search.type.TransportSearchQueryThenFetchAction$AsyncAction.sendExecuteFirstPhase(TransportSearchQueryThenFetchAction.java:76) at org.elasticsearch.action.search.type.TransportSearchTypeAction$BaseAsyncAction.performFirstPhase(TransportSearchTypeAction.java:192) at org.elasticsearch.action.search.type.TransportSearchTypeAction$BaseAsyncAction.access$000(TransportSearchTypeAction.java:75) at org.elasticsearch.action.search.type.TransportSearchTypeAction$BaseAsyncAction$1.run(TransportSearchTypeAction.java:151) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:619) It seems that there is a NPE in ContextIndexSearcher.removeCollectors(). Something strange is that I'm not in DEBUG mode. I use the standard logging setup file but the trace seems to be a DEBUG trace... Thanks for any help. Should I open a bug for that ? Cheers ---
**Author:** ![kimchy](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/kimchy/32/44952_2.png) [@kimchy](https://discuss.elastic.co/u/kimchy)\ **Post date:** [May 17, 2011, 1:02pm UTC](https://discuss.elastic.co/t/npe-in-contextindexsearcher/4420/2 "2011-05-17T13:02:52Z")
Heya, Yea, this looks like a possible bug when providing empty facets element. Opened an issue for it: [Search: Empty facets element causes search failures · Issue #938 · elastic/elasticsearch · GitHub](https://github.com/elasticsearch/elasticsearch/issues/938). -shay.banon On Tuesday, May 17, 2011 at 10:19 AM, dpilato wrote: > Hi, > > I'm using the Elasticsearch FrontEnd client ( > [GitHub - mobz/elasticsearch-head: A web front end for an elastic search cluster](https://github.com/mobz/elasticsearch-head) ). The last version in master... > > I use it with ES 0.16.1. > > When I try to search (simple match\_all query), I get a NPE. > > Here is what ESFrontEnd is sending to ES : > { > query: { > bool: { > must: [ > { > match\_all: { } > } > ] > must\_not: > should: > } > } > from: 0 > size: 50 > sort: > facets: { } > } > > In ES logs, I get : > [2011-05-17 09:08:40,592][DEBUG][action.search.type] [The Entity] > [dau][4], node[6bzzlBiuTVu52IhXYwE4Qw], [P], s[STARTED]: Failed to execute > [org.elasticsearch.action.search.SearchRequest@1b6ba28] > java.lang.NullPointerException > at > org.elasticsearch.search.internal.ContextIndexSearcher.removeCollectors(ContextIndexSearcher.java:81) > at org.elasticsearch.search.facet.FacetPhase.execute(FacetPhase.java:72) > at org.elasticsearch.search.query.QueryPhase.execute(QueryPhase.java:220) > at > org.elasticsearch.search.SearchService.executeQueryPhase(SearchService.java:222) > at > org.elasticsearch.search.action.SearchServiceTransportAction.sendExecuteQuery(SearchServiceTransportAction.java:134) > at > org.elasticsearch.action.search.type.TransportSearchQueryThenFetchAction$AsyncAction.sendExecuteFirstPhase(TransportSearchQueryThenFetchAction.java:76) > at > org.elasticsearch.action.search.type.TransportSearchTypeAction$BaseAsyncAction.performFirstPhase(TransportSearchTypeAction.java:192) > at > org.elasticsearch.action.search.type.TransportSearchTypeAction$BaseAsyncAction.access$000(TransportSearchTypeAction.java:75) > at > org.elasticsearch.action.search.type.TransportSearchTypeAction$BaseAsyncAction$1.run(TransportSearchTypeAction.java:151) > at > java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) > at java.lang.Thread.run(Thread.java:619) > > It seems that there is a NPE in ContextIndexSearcher.removeCollectors(). > Something strange is that I'm not in DEBUG mode. I use the standard logging > setup file but the trace seems to be a DEBUG trace... > > Thanks for any help. > Should I open a bug for that ? > > Cheers > > -- > View this message in context: [http://elasticsearch-users.115913.n3.nabble.com/NPE-in-ContextIndexSearcher-tp2951467p2951467.html](http://elasticsearch-users.115913.n3.nabble.com/NPE-in-ContextIndexSearcher-tp2951467p2951467.html) > Sent from the Elasticsearch Users mailing list archive at [Nabble.com](http://Nabble.com). ---
**Author:** ![Alois\_Cochard](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/alois_cochard/32/3176_2.png) [@Alois\_Cochard](https://discuss.elastic.co/u/Alois_Cochard)\ **Post date:** [May 24, 2011, 6:10am UTC](https://discuss.elastic.co/t/npe-in-contextindexsearcher/4420/3 "2011-05-24T06:10:51Z")
I have same exception on my cluster when trying to open elasticsearch- head browser ☹ On May 17, 3:02 pm, Shay Banon [shay.ba...@elasticsearch.com](mailto:shay.ba...@elasticsearch.com) wrote: > Heya, > > Yea, this looks like a possible bug when providing empty facets element. Opened an issue for it:[Search: Empty facets element causes search failures · Issue #938 · elastic/elasticsearch · GitHub](https://github.com/elasticsearch/elasticsearch/issues/938). > > -shay.banon > > On Tuesday, May 17, 2011 at 10:19 AM, dpilato wrote: > > > Hi, > > > I'm using the Elasticsearch FrontEnd client ( > > [GitHub - mobz/elasticsearch-head: A web front end for an elastic search cluster](https://github.com/mobz/elasticsearch-head)). The last version in master... > > > I use it with ES 0.16.1. > > > When I try to search (simple match\_all query), I get a NPE. > > > Here is what ESFrontEnd is sending to ES : > > { > > query: { > > bool: { > > must: [ > > { > > match\_all: { } > > } > > ] > > must\_not: > > should: > > } > > } > > from: 0 > > size: 50 > > sort: > > facets: { } > > } > > > In ES logs, I get : > > [2011-05-17 09:08:40,592][DEBUG][action.search.type] [The Entity] > > [dau][4], node[6bzzlBiuTVu52IhXYwE4Qw], [P], s[STARTED]: Failed to execute > > [org.elasticsearch.action.search.SearchRequest@1b6ba28] > > java.lang.NullPointerException > > at > > org.elasticsearch.search.internal.ContextIndexSearcher.removeCollectors(Con textIndexSearcher.java:81) > > at org.elasticsearch.search.facet.FacetPhase.execute(FacetPhase.java:72) > > at org.elasticsearch.search.query.QueryPhase.execute(QueryPhase.java:220) > > at > > org.elasticsearch.search.SearchService.executeQueryPhase(SearchService.java :222) > > at > > org.elasticsearch.search.action.SearchServiceTransportAction.sendExecuteQue ry(SearchServiceTransportAction.java:134) > > at > > org.elasticsearch.action.search.type.TransportSearchQueryThenFetchAction$As yncAction.sendExecuteFirstPhase(TransportSearchQueryThenFetchAction.java:76 ) > > at > > org.elasticsearch.action.search.type.TransportSearchTypeAction$BaseAsyncAct ion.performFirstPhase(TransportSearchTypeAction.java:192) > > at > > org.elasticsearch.action.search.type.TransportSearchTypeAction$BaseAsyncAct ion.access$000(TransportSearchTypeAction.java:75) > > at > > org.elasticsearch.action.search.type.TransportSearchTypeAction$BaseAsyncAct ion$1.run(TransportSearchTypeAction.java:151) > > at > > java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.j ava:886) > > at > > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java: 908) > > at java.lang.Thread.run(Thread.java:619) > > > It seems that there is a NPE in ContextIndexSearcher.removeCollectors(). > > Something strange is that I'm not in DEBUG mode. I use the standard logging > > setup file but the trace seems to be a DEBUG trace... > > > Thanks for any help. > > Should I open a bug for that ? > > > Cheers > > > -- > > View this message in context:[http://elasticsearch-users.115913.n3.nabble.com/NPE-in-ContextIndexSe](http://elasticsearch-users.115913.n3.nabble.com/NPE-in-ContextIndexSe)... > > Sent from the Elasticsearch Users mailing list archive at [Nabble.com](http://Nabble.com). ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 6, 2017, 4:05am UTC](https://discuss.elastic.co/t/npe-in-contextindexsearcher/4420/4 "2017-07-06T04:05:30Z")