[
https://issues.apache.org/jira/browse/SOLR-303?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12551457
]
Gereon Steffens commented on SOLR-303:
--------------------------------------
I started experimenting with this patch and have a couple of issues.
First, the patch did not apply cleanly to the latest trunk (603869), so I
reverted to 600419 - no big deal.
I then set up two separate tomcat/solr instances using identical schemas (on
ports 8080 and 8090) and tried querying both using solr/search requests and
can't any of my queries to work.
For example, there is a document with field "id" = 1527426 in the database on
port 8090. "id" is defined as a "sint" field. The 8080 instance has no such id.
When querying
"http://localhost/8080/solr/search?q=id:1527426&shards=local,localhost:8090/solr";,
I get the following in the tomcat logs:
{noformat}
catalina.out on the 8080 instance:
Dec 13, 2007 10:55:04 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values responseHeader :
org.apache.solr.common.util.SimpleOrderedMap
Dec 13, 2007 10:55:04 AM org.apache.solr.handler.component.ResponseBuilder
<init>
INFO: ### *** shards len 2
Dec 13, 2007 10:55:04 AM
org.apache.solr.handler.federated.component.GlobalCollectionStatComponent
extractTerms
INFO: --------Extract terms starting----------- :
Dec 13, 2007 10:55:04 AM
org.apache.solr.handler.federated.component.GlobalCollectionStatComponent
extractTerms
INFO: ### *** is shards null false
Dec 13, 2007 10:55:04 AM
org.apache.solr.handler.federated.component.GlobalCollectionStatComponent
extractTerms
INFO: ### *** SHARDS len 2
Dec 13, 2007 10:55:04 AM org.apache.solr.handler.federated.XMLResponseParser
parse
INFO: ->Request
http://localhost:8090/solr/select?q=id%3A1527426&shards=local%2Clocalhost%3A8090%2Fsolr&eqt=true&;
Dec 13, 2007 10:55:04 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values responseHeader : org.apache.solr.common.util.NamedList
Dec 13, 2007 10:55:04 AM
org.apache.solr.handler.federated.component.GlobalCollectionStatComponent
execute
WARNING: Exception while querying shard localhost:8090/solr
:java.lang.NullPointerException
Dec 13, 2007 10:55:04 AM
org.apache.solr.handler.federated.component.GlobalCollectionStatComponent
calcuateGlobalCollectionStat
INFO: --------getGlobalCollectionStat starting----------- :
Dec 13, 2007 10:55:04 AM org.apache.solr.handler.federated.XMLResponseParser
parse
INFO: ->Request
http://localhost:8090/solr/federated/collectionstats?terms=id%3A%C2%80%C5%B4%E0%BA%82%2C&;
Dec 13, 2007 10:55:04 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values responseHeader : org.apache.solr.common.util.NamedList
Dec 13, 2007 10:55:04 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values nd : java.lang.Integer
Dec 13, 2007 10:55:04 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values tdf : org.apache.solr.common.util.NamedList
Dec 13, 2007 10:55:04 AM
org.apache.solr.handler.federated.component.MainQPhaseComponent process
INFO: --------MainQPhaseComponent starting----------- :
Dec 13, 2007 10:55:04 AM
org.apache.solr.handler.federated.component.FedSearchComponent executeOnLocal
INFO: ->Local request params: {fl=id,score,,q=id:1527426,nd=74621,tdf=id:[EMAIL
PROTECTED],,fsv=true}
Dec 13, 2007 10:55:04 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values responseHeader :
org.apache.solr.common.util.SimpleOrderedMap
Dec 13, 2007 10:55:04 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values response : org.apache.solr.search.DocSlice
Dec 13, 2007 10:55:04 AM org.apache.solr.core.SolrCore execute
INFO: null nd=74621&fsv=true&tdf=id:[EMAIL
PROTECTED],&q=id:1527426&fl=id,score, 0 1
Dec 13, 2007 10:55:04 AM org.apache.solr.handler.federated.XMLResponseParser
parse
INFO: ->Request
http://localhost:8090/solr/select?fl=id%2Cscore%2C&q=id%3A1527426&nd=74621&tdf=id%3A%C2%80%C5%B4%E0%BA%82%401%2C&fsv=true&;
Dec 13, 2007 10:55:04 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values responseHeader : org.apache.solr.common.util.NamedList
Dec 13, 2007 10:55:04 AM
org.apache.solr.handler.federated.component.MainQPhaseComponent process
WARNING: Exception while querying shard localhost:8090/solr
:java.lang.ClassCastException: java.lang.Integer
Dec 13, 2007 10:55:04 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values response :
org.apache.solr.handler.federated.ResponseDocs
Dec 13, 2007 10:55:04 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values responseHeader : org.apache.solr.common.util.NamedList
Dec 13, 2007 10:55:04 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values response :
org.apache.solr.handler.federated.ResponseDocs
Dec 13, 2007 10:55:04 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values responseHeader : org.apache.solr.common.util.NamedList
Dec 13, 2007 10:55:04 AM
org.apache.solr.handler.federated.component.AuxiliaryQPhaseComponent process
INFO: --------AuxiliaryQPhaseComponent starting----------- :
Dec 13, 2007 10:55:04 AM org.apache.solr.core.SolrCore execute
INFO: /search q=id:1527426&shards=local,localhost:8090/solr 0 60
{noformat}
{noformat}
catalina.out on the 8090 instance
Dec 13, 2007 10:55:04 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values responseHeader :
org.apache.solr.common.util.SimpleOrderedMap
Dec 13, 2007 10:55:04 AM org.apache.solr.handler.component.ResponseBuilder
<init>
INFO: ### *** shards len 2
Dec 13, 2007 10:55:04 AM org.apache.solr.core.SolrCore execute
INFO: /select q=id:1527426&eqt=true&shards=local,localhost:8090/solr 0 3
Dec 13, 2007 10:55:04 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values responseHeader :
org.apache.solr.common.util.SimpleOrderedMap
Dec 13, 2007 10:55:04 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values nd : java.lang.Integer
Dec 13, 2007 10:55:04 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values tdf : org.apache.solr.common.util.NamedList
Dec 13, 2007 10:55:04 AM org.apache.solr.core.SolrCore execute
INFO: /federated/collectionstats terms=id:Ŵຂ, 0 3
Dec 13, 2007 10:55:04 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values responseHeader :
org.apache.solr.common.util.SimpleOrderedMap
Dec 13, 2007 10:55:04 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values response : org.apache.solr.search.DocSlice
Dec 13, 2007 10:55:04 AM org.apache.solr.core.SolrCore execute
INFO: /select nd=74621&fsv=true&fl=id,score,&q=id:1527426&tdf=id:[EMAIL
PROTECTED], 0 1
{noformat}
So the request does reach the 8090 instance, but triggers a CastException on
the 8080 instance. The XML output is
{noformat}
<?xml version="1.0" encoding="UTF-8"?>
<response>
<lst name="responseHeader">
<int name="status">0</int>
<int name="QTime">135</int>
<lst name="params">
<str name="q">id:1527426</str>
<str name="shards">local,localhost:8090/solr</str>
</lst>
</lst>
<result name="response" numFound="0" start="0"/>
<lst name="responseHeader">
<lst name="local">
<int name="status">0</int>
<int name="QTime">4</int>
<lst name="params">
<str name="nd">74621</str>
<str name="fsv">true</str>
<str name="tdf">id:[EMAIL PROTECTED],</str>
<str name="q">id:1527426</str>
<str name="fl">id,score,</str>
</lst>
</lst>
</lst>
</response>
{noformat}
The "reverse" request for
"http://localhost:8090/solr/search?q=id:1527426&shards=local,localhost:8080/solr";
produces an HTTP Status 500 - null java.lang.NullPointerException response,
the logs are:
{noformat}
catalina.out on the 8080 instance
Dec 13, 2007 11:07:33 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values responseHeader :
org.apache.solr.common.util.SimpleOrderedMap
Dec 13, 2007 11:07:33 AM org.apache.solr.handler.component.ResponseBuilder
<init>
INFO: ### *** shards len 2
Dec 13, 2007 11:07:33 AM org.apache.solr.core.SolrCore execute
INFO: /select q=id:1527426&eqt=true&shards=local,localhost:8080/solr 0 2
Dec 13, 2007 11:07:33 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values responseHeader :
org.apache.solr.common.util.SimpleOrderedMap
Dec 13, 2007 11:07:33 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values nd : java.lang.Integer
Dec 13, 2007 11:07:33 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values tdf : org.apache.solr.common.util.NamedList
Dec 13, 2007 11:07:33 AM org.apache.solr.core.SolrCore execute
INFO: /federated/collectionstats terms=id:Ŵຂ, 0 5
Dec 13, 2007 11:07:33 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values responseHeader :
org.apache.solr.common.util.SimpleOrderedMap
Dec 13, 2007 11:07:33 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values response : org.apache.solr.search.DocSlice
Dec 13, 2007 11:07:33 AM org.apache.solr.core.SolrCore execute
INFO: /select nd=74621&fsv=true&fl=id,score,&q=id:1527426&tdf=id:[EMAIL
PROTECTED], 0 1
{noformat}
{noformat}
catalina.out on the 8090 instance
Dec 13, 2007 11:07:33 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values responseHeader :
org.apache.solr.common.util.SimpleOrderedMap
Dec 13, 2007 11:07:33 AM org.apache.solr.handler.component.ResponseBuilder
<init>
INFO: ### *** shards len 2
Dec 13, 2007 11:07:33 AM
org.apache.solr.handler.federated.component.GlobalCollectionStatComponent
extractTerms
INFO: --------Extract terms starting----------- :
Dec 13, 2007 11:07:33 AM
org.apache.solr.handler.federated.component.GlobalCollectionStatComponent
extractTerms
INFO: ### *** is shards null false
Dec 13, 2007 11:07:33 AM
org.apache.solr.handler.federated.component.GlobalCollectionStatComponent
extractTerms
INFO: ### *** SHARDS len 2
Dec 13, 2007 11:07:33 AM org.apache.solr.handler.federated.XMLResponseParser
parse
INFO: ->Request
http://localhost:8080/solr/select?q=id%3A1527426&shards=local%2Clocalhost%3A8080%2Fsolr&eqt=true&;
Dec 13, 2007 11:07:33 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values responseHeader : org.apache.solr.common.util.NamedList
Dec 13, 2007 11:07:33 AM
org.apache.solr.handler.federated.component.GlobalCollectionStatComponent
execute
WARNING: Exception while querying shard localhost:8080/solr
:java.lang.NullPointerException
Dec 13, 2007 11:07:33 AM
org.apache.solr.handler.federated.component.GlobalCollectionStatComponent
calcuateGlobalCollectionStat
INFO: --------getGlobalCollectionStat starting----------- :
Dec 13, 2007 11:07:33 AM org.apache.solr.handler.federated.XMLResponseParser
parse
INFO: ->Request
http://localhost:8080/solr/federated/collectionstats?terms=id%3A%C2%80%C5%B4%E0%BA%82%2C&;
Dec 13, 2007 11:07:33 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values responseHeader : org.apache.solr.common.util.NamedList
Dec 13, 2007 11:07:33 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values nd : java.lang.Integer
Dec 13, 2007 11:07:33 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values tdf : org.apache.solr.common.util.NamedList
Dec 13, 2007 11:07:33 AM
org.apache.solr.handler.federated.component.MainQPhaseComponent process
INFO: --------MainQPhaseComponent starting----------- :
Dec 13, 2007 11:07:33 AM org.apache.solr.handler.federated.XMLResponseParser
parse
INFO: ->Request
http://localhost:8080/solr/select?fl=id%2Cscore%2C&q=id%3A1527426&nd=74621&tdf=id%3A%C2%80%C5%B4%E0%BA%82%401%2C&fsv=true&;
Dec 13, 2007 11:07:33 AM
org.apache.solr.handler.federated.component.FedSearchComponent executeOnLocal
INFO: ->Local request params: {fl=id,score,,q=id:1527426,nd=74621,tdf=id:[EMAIL
PROTECTED],,fsv=true}
Dec 13, 2007 11:07:33 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values responseHeader :
org.apache.solr.common.util.SimpleOrderedMap
Dec 13, 2007 11:07:33 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values response : org.apache.solr.search.DocSlice
Dec 13, 2007 11:07:33 AM org.apache.solr.core.SolrCore execute
INFO: null nd=74621&fsv=true&tdf=id:[EMAIL
PROTECTED],&q=id:1527426&fl=id,score, 0 4
Dec 13, 2007 11:07:33 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values responseHeader : org.apache.solr.common.util.NamedList
Dec 13, 2007 11:07:33 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values response :
org.apache.solr.handler.federated.ResponseDocs
Dec 13, 2007 11:07:33 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values response :
org.apache.solr.handler.federated.ResponseDocs
Dec 13, 2007 11:07:33 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values responseHeader : org.apache.solr.common.util.NamedList
Dec 13, 2007 11:07:33 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values response :
org.apache.solr.handler.federated.ResponseDocs
Dec 13, 2007 11:07:33 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values responseHeader : org.apache.solr.common.util.NamedList
Dec 13, 2007 11:07:33 AM
org.apache.solr.handler.federated.component.AuxiliaryQPhaseComponent process
INFO: --------AuxiliaryQPhaseComponent starting----------- :
Dec 13, 2007 11:07:33 AM
org.apache.solr.handler.federated.component.FedSearchComponent executeOnLocal
INFO: ->Local request params: {dq=id:"Ŵຂ" ,q=id:1527426}
Dec 13, 2007 11:07:33 AM org.apache.solr.request.SolrQueryResponse add
INFO: adding into values responseHeader :
org.apache.solr.common.util.SimpleOrderedMap
Dec 13, 2007 11:07:33 AM org.apache.solr.common.SolrException log
SEVERE: java.lang.NumberFormatException: For input string: "Ŵຂ"
at
java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)
at java.lang.Integer.parseInt(Integer.java:447)
at java.lang.Integer.parseInt(Integer.java:497)
at org.apache.solr.util.NumberUtils.int2sortableStr(NumberUtils.java:36)
at
org.apache.solr.schema.SortableIntField.toInternal(SortableIntField.java:52)
at
org.apache.solr.schema.FieldType$DefaultAnalyzer$1.next(FieldType.java:315)
at
org.apache.lucene.queryParser.QueryParser.getFieldQuery(QueryParser.java:437)
at
org.apache.solr.search.SolrQueryParser.getFieldQuery(SolrQueryParser.java:97)
at
org.apache.lucene.queryParser.QueryParser.getFieldQuery(QueryParser.java:515)
at org.apache.lucene.queryParser.QueryParser.Term(QueryParser.java:1227)
at
org.apache.lucene.queryParser.QueryParser.Clause(QueryParser.java:979)
at org.apache.lucene.queryParser.QueryParser.Query(QueryParser.java:907)
at
org.apache.lucene.queryParser.QueryParser.TopLevelQuery(QueryParser.java:896)
at org.apache.lucene.queryParser.QueryParser.parse(QueryParser.java:146)
at org.apache.solr.search.QueryParsing.parseQuery(QueryParsing.java:101)
at
org.apache.solr.handler.federated.component.AuxiliaryQPhaseComponent.prepare(AuxiliaryQPhaseComponent.java:71)
at
org.apache.solr.handler.SearchHandler.handleRequestBody(SearchHandler.java:152)
at
org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:117)
at org.apache.solr.core.SolrCore.execute(SolrCore.java:866)
at
org.apache.solr.handler.federated.component.FedSearchComponent.executeOnLocal(FedSearchComponent.java:87)
at
org.apache.solr.handler.federated.component.AuxiliaryQPhaseComponent$1.call(AuxiliaryQPhaseComponent.java:115)
at
org.apache.solr.handler.federated.component.AuxiliaryQPhaseComponent$1.call(AuxiliaryQPhaseComponent.java:114)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:269)
at java.util.concurrent.FutureTask.run(FutureTask.java:123)
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:417)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:269)
at java.util.concurrent.FutureTask.run(FutureTask.java:123)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:65)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:168)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
at java.lang.Thread.run(Thread.java:595)
Dec 13, 2007 11:07:33 AM org.apache.solr.core.SolrCore execute
INFO: null q=id:1527426&dq=id:"Ŵຂ"+ 0 2
Dec 13, 2007 11:07:33 AM org.apache.solr.common.SolrException log
SEVERE: java.lang.NullPointerException
at
org.apache.solr.handler.federated.SearchResponseMerger.mergeResponseDocs_NoSort(SearchResponseMerger.java:215)
at
org.apache.solr.handler.federated.SearchResponseMerger.merge(SearchResponseMerger.java:83)
at
org.apache.solr.handler.federated.component.AuxiliaryQPhaseComponent.process(AuxiliaryQPhaseComponent.java:156)
at
org.apache.solr.handler.SearchHandler.handleRequestBody(SearchHandler.java:158)
at
org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:117)
at org.apache.solr.core.SolrCore.execute(SolrCore.java:866)
at
org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:206)
at
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:174)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:210)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:870)
at
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:685)
at java.lang.Thread.run(Thread.java:595)
Dec 13, 2007 11:07:33 AM org.apache.solr.core.SolrCore execute
INFO: /search q=id:1527426&shards=local,localhost:8080/solr 0 95
Dec 13, 2007 11:07:33 AM org.apache.solr.common.SolrException log
SEVERE: java.lang.NullPointerException
at
org.apache.solr.handler.federated.SearchResponseMerger.mergeResponseDocs_NoSort(SearchResponseMerger.java:215)
at
org.apache.solr.handler.federated.SearchResponseMerger.merge(SearchResponseMerger.java:83)
at
org.apache.solr.handler.federated.component.AuxiliaryQPhaseComponent.process(AuxiliaryQPhaseComponent.java:156)
at
org.apache.solr.handler.SearchHandler.handleRequestBody(SearchHandler.java:158)
at
org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:117)
at org.apache.solr.core.SolrCore.execute(SolrCore.java:866)
at
org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:206)
at
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:174)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:210)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:870)
at
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:685)
at java.lang.Thread.run(Thread.java:595)
{noformat}
> Distributed Search over HTTP
> ----------------------------
>
> Key: SOLR-303
> URL: https://issues.apache.org/jira/browse/SOLR-303
> Project: Solr
> Issue Type: New Feature
> Components: search
> Reporter: Sharad Agarwal
> Assignee: Yonik Seeley
> Attachments: fedsearch.patch, fedsearch.patch, fedsearch.patch,
> fedsearch.patch, fedsearch.patch, fedsearch.patch, fedsearch.patch,
> fedsearch.stu.patch, fedsearch.stu.patch
>
>
> Searching over multiple shards and aggregating results.
> Motivated by http://wiki.apache.org/solr/DistributedSearch
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