I’m saying “don’t use cursorMark”. Just use an increasing start parameter. 
Unless start gets to the thousands, it’s not likely to have a noticeable 
impact. And whenever start != 0, don’t enable elevation.

Best,
Erick

> On Mar 14, 2019, at 3:05 AM, Monica Marrero (JIRA) <[email protected]> wrote:
> 
> 
>    [ 
> https://issues.apache.org/jira/browse/SOLR-11921?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16792514#comment-16792514
>  ] 
> 
> Monica Marrero commented on SOLR-11921:
> ---------------------------------------
> 
> Not sure I understand... the start parameter has to be 0 in case we use it 
> together with cursorMark, so in our case, we start with cursorMark=* 
> (equivalent to start=0) and then we go to the next pages from there with the 
> value of nextCursorMark.
> 
> For the moment, we can disable the elevation (enableElevation=false) when 
> using cursorMarks.
> 
> Thanks!
> 
>> cursorMark with elevateIds throws Exception
>> -------------------------------------------
>> 
>>                Key: SOLR-11921
>>                URL: https://issues.apache.org/jira/browse/SOLR-11921
>>            Project: Solr
>>         Issue Type: Bug
>>     Security Level: Public(Default Security Level. Issues are Public) 
>>         Components: SearchComponents - other
>>   Affects Versions: 7.2
>>           Reporter: Greg Roodt
>>           Priority: Minor
>> 
>> When cursorMark pagination is used together with elevateIds, an exception is 
>> thrown.
>>  
>> Steps to reproduce described below.
>>  
>> 1. Start solr with the `demo` core
>> {{docker run --name solr_cursor_elevate -d -p 8983:8983 solr:7.2 solr-demo}}
>>  
>> 2. Add some test documents
>> {{curl http://localhost:8983/solr/demo/update?commit=true -d '}}
>> {{[}}
>> {{ {"id" : "book1",}}
>> {{ "title_t" : "book one"}}
>> {{ },}}
>> {{ {"id" : "book2",}}
>> {{ "title_t" : "book two"}}
>> {{ },}}
>> {{ {"id" : "book3",}}
>> {{ "title_t" : "book three"}}
>> {{ }}}
>> {{]'}}
>>  
>> 3. Execute a query with cursorMark and elevateIds
>> curl 
>> '[http://localhost:8983/solr/demo/elevate?cursorMark=*&elevateIds=book3&enableElevation=true&df=title_t&fl=id,title_t&forceElevation=true&q=book&rows=2&sort=id%20asc'|http://localhost:8983/solr/demo/elevate?cursorMark=*&elevateIds=book3&enableElevation=true&df=title_t&fl=id,title_t&forceElevation=true&q=book&rows=2&sort=id%20asc%27]
>>  
>> Observe the stacktrace:
>> null:java.lang.ClassCastException: java.lang.Integer cannot be cast to 
>> org.apache.lucene.util.BytesRef
>>      at 
>> org.apache.solr.schema.FieldType.marshalStringSortValue(FieldType.java:1127)
>>      at org.apache.solr.schema.StrField.marshalSortValue(StrField.java:100)
>>      at 
>> org.apache.solr.search.CursorMark.getSerializedTotem(CursorMark.java:250)
>>      at 
>> org.apache.solr.handler.component.QueryComponent.doProcessUngroupedSearch(QueryComponent.java:1445)
>>      at 
>> org.apache.solr.handler.component.QueryComponent.process(QueryComponent.java:375)
>>      at 
>> org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:295)
>>      at 
>> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:177)
>>      at org.apache.solr.core.SolrCore.execute(SolrCore.java:2503)
>>      at org.apache.solr.servlet.HttpSolrCall.execute(HttpSolrCall.java:710)
>>      at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:516)
>>      at 
>> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:382)
>>      at 
>> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:326)
>>      at 
>> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1751)
>>      at 
>> org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:582)
>>      at 
>> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
>>      at 
>> org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
>>      at 
>> org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:226)
>>      at 
>> org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1180)
>>      at 
>> org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:512)
>>      at 
>> org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
>>      at 
>> org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1112)
>>      at 
>> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
>>      at 
>> org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:213)
>>      at 
>> org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:119)
>>      at 
>> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134)
>>      at 
>> org.eclipse.jetty.rewrite.handler.RewriteHandler.handle(RewriteHandler.java:335)
>>      at 
>> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134)
>>      at org.eclipse.jetty.server.Server.handle(Server.java:534)
>>      at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:320)
>>      at 
>> org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:251)
>>      at 
>> org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:283)
>>      at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:108)
>>      at 
>> org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:93)
>>      at 
>> org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.executeProduceConsume(ExecuteProduceConsume.java:303)
>>      at 
>> org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:148)
>>      at 
>> org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:136)
>>      at 
>> org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671)
>>      at 
>> org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589)
>>      at java.lang.Thread.run(Thread.java:748)
>>  
> 
> 
> 
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