# SearchContextMissingException when doing scan search \[0.90.7-0.90.13\]
**URL:** https://discuss.elastic.co/t/searchcontextmissingexception-when-doing-scan-search-0-90-7-0-90-13/17225
**Category:** Elasticsearch
**Created:** [April 28, 2014, 8:46am UTC](https://discuss.elastic.co/t/searchcontextmissingexception-when-doing-scan-search-0-90-7-0-90-13/17225 "2014-04-28T08:46:26Z")
**Posts on this page:** 9
**Page:** 1
### Author:  [@Matteo\_Moci](https://discuss.elastic.co/u/Matteo_Moci)
#### Post date: [April 28, 2014, 8:46am UTC](https://discuss.elastic.co/t/searchcontextmissingexception-when-doing-scan-search-0-90-7-0-90-13/17225/1 "2014-04-28T08:46:26Z")
Hi All,
First of all, thanks for the nice work!
I found out that during a simple scan search (10 docs of 1 type, on 1 node,
1 index with 2 shards, no replicas, both v0.90.7 and v0.90.13),
I _always_ receive this exception in the node logs (and it happens once per
type when I have more):
[2014-04-28 10:22:07,937][DEBUG][action.search.type] [moxbook] [45]
Failed to execute query phase
org.elasticsearch.search.SearchContextMissingException: No search context
found for id [45]
at
org.elasticsearch.search.SearchService.findContext(SearchService.java:460)
at
org.elasticsearch.search.SearchService.executeScan(SearchService.java:211)
at
org.elasticsearch.search.action.SearchServiceTransportAction.sendExecuteScan(SearchServiceTransportAction.java:474)
at
org.elasticsearch.action.search.type.TransportSearchScrollScanAction$AsyncAction.executePhase(TransportSearchScrollScanAction.java:210)
at
org.elasticsearch.action.search.type.TransportSearchScrollScanAction$AsyncAction$2.run(TransportSearchScrollScanAction.java:180)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:722)
What worries me is that apparently in my tests, it is able to scan all the
docs with no missing records,
so I don't know if it's "normal" to have logs like this or if in some cases
it will lead to problems.
I already saw that there's a closed issue at [5165], but I don't know if
the fix
was already included in the releases I tried, 0.90.7 (surely not) and
0.90.13 (?).
Changing SearchOperationThreading doesn't help.
You can see the relevant snippet I used to get the exception at [1],
maybe there is something missing there?
Could someone help to find out if it's ok, or where the fix was introduced?
PS: I didn't upgrade to 1.x yet.
Best,
Matteo
[5165] [https://github.com/elasticsearch/elasticsearch/issues/5165](https://github.com/elasticsearch/elasticsearch/issues/5165)
[1] [https://gist.github.com/mox601/545c7176785ef209f7f3](https://gist.github.com/mox601/545c7176785ef209f7f3)
--
Matteo Moci
[http://mox.fm](http://mox.fm)
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### Author:  [@jprante](https://discuss.elastic.co/u/jprante)
#### Post date: [April 28, 2014, 8:56am UTC](https://discuss.elastic.co/t/searchcontextmissingexception-when-doing-scan-search-0-90-7-0-90-13/17225/2 "2014-04-28T08:56:17Z")
The message is serious because it signals that your scan/scroll search has
prematurely ended and responses may be dropped (or not).
It would be nice to show us your code and your shard settings.
search.keep\_alive\_interval is the parameter that can influence the search
reaper, not search operation threading. The reaper runs each minute and
might run too frequently. While not sure about your setting of scan/scroll
lifetime, I can't tell more.
Jörg
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### Author:  [@Matteo\_Moci](https://discuss.elastic.co/u/Matteo_Moci)
#### Post date: [April 28, 2014, 9:32am UTC](https://discuss.elastic.co/t/searchcontextmissingexception-when-doing-scan-search-0-90-7-0-90-13/17225/3 "2014-04-28T09:32:49Z")
Hi Jorg,
Thanks for the reply.
If that helps, I linked a snippet with the code at [1].
In addition, the test I did was on 1 index, 2 shards with 0 replicas,
see the status at [2] and settings at [3].
Ho can I provide you more details?
Thanks,
Matteo
[1] [scroll-search.java · GitHub](https://gist.github.com/mox601/545c7176785ef209f7f3)
[2] [index-status.json · GitHub](https://gist.github.com/mox601/fd806317dbe1d89ff12c)
[3] [index-settings.json · GitHub](https://gist.github.com/mox601/11366726)
On Mon, Apr 28, 2014 at 10:56 AM, [joergprante@gmail.com](mailto:joergprante@gmail.com) \<
[joergprante@gmail.com](mailto:joergprante@gmail.com)\> wrote:
> The message is serious because it signals that your scan/scroll search has
> prematurely ended and responses may be dropped (or not).
>
> It would be nice to show us your code and your shard settings.
>
> search.keep\_alive\_interval is the parameter that can influence the search
> reaper, not search operation threading. The reaper runs each minute and
> might run too frequently. While not sure about your setting of scan/scroll
> lifetime, I can't tell more.
>
> Jörg
>
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> .
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--
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[http://mox.fm](http://mox.fm)
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### Author:  [@jprante](https://discuss.elastic.co/u/jprante)
#### Post date: [April 28, 2014, 9:39am UTC](https://discuss.elastic.co/t/searchcontextmissingexception-when-doing-scan-search-0-90-7-0-90-13/17225/4 "2014-04-28T09:39:07Z")
Thanks - it helps!
Not sure about the "new Scroll(keepAlive)"
In my code, I use .setScroll(TimeValue.timeValueSeconds(30))
Maybe this helps?
Jörg
On Mon, Apr 28, 2014 at 11:32 AM, Matteo Moci [mox601@gmail.com](mailto:mox601@gmail.com) wrote:
> Hi Jorg,
> Thanks for the reply.
> If that helps, I linked a snippet with the code at [1].
> In addition, the test I did was on 1 index, 2 shards with 0 replicas,
> see the status at [2] and settings at [3].
>
> Ho can I provide you more details?
>
> Thanks,
> Matteo
>
> [1] [scroll-search.java · GitHub](https://gist.github.com/mox601/545c7176785ef209f7f3)
> [2] [index-status.json · GitHub](https://gist.github.com/mox601/fd806317dbe1d89ff12c)
> [3] [index-settings.json · GitHub](https://gist.github.com/mox601/11366726)
>
> On Mon, Apr 28, 2014 at 10:56 AM, [joergprante@gmail.com](mailto:joergprante@gmail.com) \<
> [joergprante@gmail.com](mailto:joergprante@gmail.com)\> wrote:
>
> > The message is serious because it signals that your scan/scroll search
> > has prematurely ended and responses may be dropped (or not).
> >
> > It would be nice to show us your code and your shard settings.
> >
> > search.keep\_alive\_interval is the parameter that can influence the search
> > reaper, not search operation threading. The reaper runs each minute and
> > might run too frequently. While not sure about your setting of scan/scroll
> > lifetime, I can't tell more.
> >
> > Jörg
> >
> > --
> > You received this message because you are subscribed to the Google Groups
> > "elasticsearch" group.
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> > email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com).
> > To view this discussion on the web visit
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> > .
> >
> > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout).
>
> --
> Matteo Moci
> [http://mox.fm](http://mox.fm)
>
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### Author:  [@jprante](https://discuss.elastic.co/u/jprante)
#### Post date: [April 28, 2014, 9:53am UTC](https://discuss.elastic.co/t/searchcontextmissingexception-when-doing-scan-search-0-90-7-0-90-13/17225/5 "2014-04-28T09:53:50Z")
OK, the "new Scroll(...)" should'nt make any difference....
Maybe the cause for theerror message is the clear scroll call at the end?
If so, it shouldn't be serious.
Jörg
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### Author:  [@Matteo\_Moci](https://discuss.elastic.co/u/Matteo_Moci)
#### Post date: [April 28, 2014, 10:44am UTC](https://discuss.elastic.co/t/searchcontextmissingexception-when-doing-scan-search-0-90-7-0-90-13/17225/6 "2014-04-28T10:44:23Z")
Hi Jorg,
Investigating on what call the exception relates to,
I ran the search on 2 types, and I'll show you the merged logs of my client
and the one printed on the node:
[2014-04-28 12:09:07,_438_][DEBUG][action.search.type] [moxbook-pro]
[2] Failed to execute query phase
2014-04-28 12:09:07,_442_/CEST [main] INFO finished scrolling, hits length
\<=0
[2014-04-28 12:09:07,_455_][DEBUG][action.search.type] [moxbook-pro]
[3] Failed to execute query phase
2014-04-28 12:09:07,_456_/CEST [main] INFO finished scrolling, hits length
\<=0
The client logs are printed by the client code (running on the same
machine),
once per type, after exiting the while (hits.length \> 0) scroll's cycle and
before calling the clear scroll at the end.
So to wrap up, according to what I see, the error message
of the failing execute query phase happens before the clear scroll.
Following another path and reading your first email,
I added to the configuration file elasticsearch.yml the line:
search.keep\_alive\_interval: 1H
hoping to set the search keep alive explicitly on the node.
Starting the node like this:
$ ./elasticsearch -f -Des.logger.level=DEBUG
gives this log [1], but can't find mention of the keep alive interval I set
up.
Is it the right parameter name, and should it help?
Thanks,
Matteo
[1] [gist:11368114 · GitHub](https://gist.github.com/mox601/11368114)
On Mon, Apr 28, 2014 at 11:53 AM, [joergprante@gmail.com](mailto:joergprante@gmail.com) \<
[joergprante@gmail.com](mailto:joergprante@gmail.com)\> wrote:
> OK, the "new Scroll(...)" should'nt make any difference....
>
> Maybe the cause for theerror message is the clear scroll call at the end?
> If so, it shouldn't be serious.
>
> Jörg
>
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> .
>
> For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout).
--
Matteo Moci
[http://mox.fm](http://mox.fm)
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### Author:  [@jprante](https://discuss.elastic.co/u/jprante)
#### Post date: [April 28, 2014, 11:29am UTC](https://discuss.elastic.co/t/searchcontextmissingexception-when-doing-scan-search-0-90-7-0-90-13/17225/7 "2014-04-28T11:29:15Z")
Reviewing your code, you have made a small mistake.
In the while loop, do not use currentScanSearchResp.getScrollId()
>
This can get outdated in the while loop.
Instead, use searchResponse.getScrollId()
Background info: the scroll ID changes from response to response!
Jörg
On Mon, Apr 28, 2014 at 12:44 PM, Matteo Moci [mox601@gmail.com](mailto:mox601@gmail.com) wrote:
> Hi Jorg,
> Investigating on what call the exception relates to,
> I ran the search on 2 types, and I'll show you the merged logs of my
> client and the one printed on the node:
>
> [2014-04-28 12:09:07,_438_][DEBUG][action.search.type]
> [moxbook-pro] [2] Failed to execute query phase
> 2014-04-28 12:09:07,_442_/CEST [main] INFO finished scrolling, hits
> length \<=0
> [2014-04-28 12:09:07,_455_][DEBUG][action.search.type]
> [moxbook-pro] [3] Failed to execute query phase
> 2014-04-28 12:09:07,_456_/CEST [main] INFO finished scrolling, hits
> length \<=0
>
> The client logs are printed by the client code (running on the same
> machine),
> once per type, after exiting the while (hits.length \> 0) scroll's cycle
> and
> before calling the clear scroll at the end.
>
> So to wrap up, according to what I see, the error message
> of the failing execute query phase happens before the clear scroll.
>
> Following another path and reading your first email,
> I added to the configuration file elasticsearch.yml the line:
>
> search.keep\_alive\_interval: 1H
> hoping to set the search keep alive explicitly on the node.
>
> Starting the node like this:
> $ ./elasticsearch -f -Des.logger.level=DEBUG
> gives this log [1], but can't find mention of the keep alive interval I
> set up.
>
> Is it the right parameter name, and should it help?
>
> Thanks,
> Matteo
>
> [1] [gist:11368114 · GitHub](https://gist.github.com/mox601/11368114)
>
> On Mon, Apr 28, 2014 at 11:53 AM, [joergprante@gmail.com](mailto:joergprante@gmail.com) \<
> [joergprante@gmail.com](mailto:joergprante@gmail.com)\> wrote:
>
> > OK, the "new Scroll(...)" should'nt make any difference....
> >
> > Maybe the cause for theerror message is the clear scroll call at the end?
> > If so, it shouldn't be serious.
> >
> > Jörg
> >
> > --
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> > .
> >
> > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout).
>
> --
> Matteo Moci
> [http://mox.fm](http://mox.fm)
>
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### Author:  [@Matteo\_Moci](https://discuss.elastic.co/u/Matteo_Moci)
#### Post date: [April 28, 2014, 11:48am UTC](https://discuss.elastic.co/t/searchcontextmissingexception-when-doing-scan-search-0-90-7-0-90-13/17225/8 "2014-04-28T11:48:17Z")
Well spotted Joerg!
I knew the scroll id was changing,
anyway in the end I coded it wrong.
Thanks and keep up the good work!
Matteo
On Mon, Apr 28, 2014 at 1:29 PM, [joergprante@gmail.com](mailto:joergprante@gmail.com) \<
[joergprante@gmail.com](mailto:joergprante@gmail.com)\> wrote:
> Reviewing your code, you have made a small mistake.
>
> In the while loop, do not use currentScanSearchResp.getScrollId()
>
> [scroll-search.java · GitHub](https://gist.github.com/mox601/545c7176785ef209f7f3#file-scroll-search-java-L59)
>
> This can get outdated in the while loop.
>
> Instead, use searchResponse.getScrollId()
>
> Background info: the scroll ID changes from response to response!
>
> Jörg
>
> On Mon, Apr 28, 2014 at 12:44 PM, Matteo Moci [mox601@gmail.com](mailto:mox601@gmail.com) wrote:
>
> > Hi Jorg,
> > Investigating on what call the exception relates to,
> > I ran the search on 2 types, and I'll show you the merged logs of my
> > client and the one printed on the node:
> >
> > [2014-04-28 12:09:07,_438_][DEBUG][action.search.type]
> > [moxbook-pro] [2] Failed to execute query phase
> > 2014-04-28 12:09:07,_442_/CEST [main] INFO finished scrolling, hits
> > length \<=0
> > [2014-04-28 12:09:07,_455_][DEBUG][action.search.type]
> > [moxbook-pro] [3] Failed to execute query phase
> > 2014-04-28 12:09:07,_456_/CEST [main] INFO finished scrolling, hits
> > length \<=0
> >
> > The client logs are printed by the client code (running on the same
> > machine),
> > once per type, after exiting the while (hits.length \> 0) scroll's cycle
> > and
> > before calling the clear scroll at the end.
> >
> > So to wrap up, according to what I see, the error message
> > of the failing execute query phase happens before the clear scroll.
> >
> > Following another path and reading your first email,
> > I added to the configuration file elasticsearch.yml the line:
> >
> > search.keep\_alive\_interval: 1H
> > hoping to set the search keep alive explicitly on the node.
> >
> > Starting the node like this:
> > $ ./elasticsearch -f -Des.logger.level=DEBUG
> > gives this log [1], but can't find mention of the keep alive interval I
> > set up.
> >
> > Is it the right parameter name, and should it help?
> >
> > Thanks,
> > Matteo
> >
> > [1] [gist:11368114 · GitHub](https://gist.github.com/mox601/11368114)
> >
> > On Mon, Apr 28, 2014 at 11:53 AM, [joergprante@gmail.com](mailto:joergprante@gmail.com) \<
> > [joergprante@gmail.com](mailto:joergprante@gmail.com)\> wrote:
> >
> > > OK, the "new Scroll(...)" should'nt make any difference....
> > >
> > > Maybe the cause for theerror message is the clear scroll call at the
> > > end? If so, it shouldn't be serious.
> > >
> > > Jörg
> > >
> > > --
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> > > .
> > >
> > > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout).
> >
> > --
> > Matteo Moci
> > [http://mox.fm](http://mox.fm)
> >
> > --
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> > .
> >
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Matteo Moci
[http://mox.fm](http://mox.fm)
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 6, 2017, 1:33am UTC](https://discuss.elastic.co/t/searchcontextmissingexception-when-doing-scan-search-0-90-7-0-90-13/17225/9 "2017-07-06T01:33:08Z")