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https://issues.apache.org/jira/browse/SOLR-236?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12606953#action_12606953
]
JList commented on SOLR-236:
----------------------------
Although field collpasing worked fine in my brief testing, when I put it to
work with more documents, I got exceptions. It seems to have something to do
with the queries (or documents, since different queries return different
documents). With some queries, this exception does not happen.
If I remove the collapse.* parameters, the error does not happen. Any idea why
this is happening? Thanks.
HTTP ERROR: 500
Unsupported Operation
org.apache.solr.common.SolrException: Unsupported Operation
at org.apache.solr.search.NegatedDocSet.iterator(NegatedDocSet.java:77)
at org.apache.solr.search.DocSetBase.getBits(DocSet.java:183)
at org.apache.solr.search.NegatedDocSet.getBits(NegatedDocSet.java:27)
at org.apache.solr.search.DocSetBase.intersection(DocSet.java:199)
at org.apache.solr.search.BitDocSet.intersection(BitDocSet.java:30)
at
org.apache.solr.search.SolrIndexSearcher.getDocListAndSetNC(SolrIndexSearcher.java:1109)
at
org.apache.solr.search.SolrIndexSearcher.getDocListC(SolrIndexSearcher.java:811)
at
org.apache.solr.search.SolrIndexSearcher.getDocListAndSet(SolrIndexSearcher.java:1282)
at
org.apache.solr.handler.component.CollapseComponent.process(CollapseComponent.java:57)
at
org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:156)
at
org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:125)
at org.apache.solr.core.SolrCore.execute(SolrCore.java:965)
at
org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:338)
at
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:272)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1089)
at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:365)
at
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:712)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
at
org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:211)
at
org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
at org.mortbay.jetty.Server.handle(Server.java:285)
at
org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:502)
at
org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:821)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:513)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:208)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:378)
at
org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:226)
at
org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:442)
> Field collapsing
> ----------------
>
> Key: SOLR-236
> URL: https://issues.apache.org/jira/browse/SOLR-236
> Project: Solr
> Issue Type: New Feature
> Components: search
> Affects Versions: 1.3
> Reporter: Emmanuel Keller
> Assignee: Otis Gospodnetic
> Attachments: field-collapsing-extended-592129.patch,
> field_collapsing_1.1.0.patch, field_collapsing_1.3.patch,
> field_collapsing_dsteigerwald.diff, field_collapsing_dsteigerwald.diff,
> field_collapsing_dsteigerwald.diff, SOLR-236-FieldCollapsing.patch,
> SOLR-236-FieldCollapsing.patch, SOLR-236-FieldCollapsing.patch, solr-236.patch
>
>
> This patch include a new feature called "Field collapsing".
> "Used in order to collapse a group of results with similar value for a given
> field to a single entry in the result set. Site collapsing is a special case
> of this, where all results for a given web site is collapsed into one or two
> entries in the result set, typically with an associated "more documents from
> this site" link. See also Duplicate detection."
> http://www.fastsearch.com/glossary.aspx?m=48&amid=299
> The implementation add 3 new query parameters (SolrParams):
> "collapse.field" to choose the field used to group results
> "collapse.type" normal (default value) or adjacent
> "collapse.max" to select how many continuous results are allowed before
> collapsing
> TODO (in progress):
> - More documentation (on source code)
> - Test cases
> Two patches:
> - "field_collapsing.patch" for current development version
> - "field_collapsing_1.1.0.patch" for Solr-1.1.0
> P.S.: Feedback and misspelling correction are welcome ;-)
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