EarlyTerminatingCollectorException in MLT Component of SOLR 4.4 - solr

Question

I send a query to SOLR, which returns exactly one document. It's a "id:some_doc_id" search. Here are the parameters as shown in the response:
params: {
mlt.mindf: "1",
mlt.count: "5",
mlt.fl: "text",
fl: "id,,application_id,... project_start,project_end,project_title,score",
start: "0",
q: "id:some_doc_id",
mlt.mintf: "1",
mlt: "true",
wt: "json",
rows: "1"
}
The reponse key contains the document I expected, but I also get an error, which seems to happen in the MLT component. Here's the stack trace provided in the response:
org.apache.solr.search.EarlyTerminatingCollectorException
at org.apache.solr.search.EarlyTerminatingCollector.collect(EarlyTerminatingCollector.java:62)
at org.apache.lucene.search.BooleanScorer2.score(BooleanScorer2.java:289)
at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:624)
at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:297)
at org.apache.solr.search.SolrIndexSearcher.getDocListNC(SolrIndexSearcher.java:1494)
at org.apache.solr.search.SolrIndexSearcher.getDocListC(SolrIndexSearcher.java:1363)
at org.apache.solr.search.SolrIndexSearcher.search(SolrIndexSearcher.java:474)
at org.apache.solr.search.SolrIndexSearcher.getDocList(SolrIndexSearcher.java:1226)
at org.apache.solr.handler.MoreLikeThisHandler$MoreLikeThisHelper.getMoreLikeThis(MoreLikeThisHandler.java:365)
at org.apache.solr.handler.component.MoreLikeThisComponent.getMoreLikeThese(MoreLikeThisComponent.java:356)
at org.apache.solr.handler.component.MoreLikeThisComponent.process(MoreLikeThisComponent.java:113)
at org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:208)
at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:135)
at org.apache.solr.core.SolrCore.execute(SolrCore.java:1904)
at org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:659)
at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:362)
at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:158)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1419)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:455)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:557)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1075)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:384)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1009)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:255)
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:154)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
at org.eclipse.jetty.server.Server.handle(Server.java:368)
at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:489)
at org.eclipse.jetty.server.BlockingHttpConnection.handleRequest(BlockingHttpConnection.java:53)
at org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:942)
at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:1004)
at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:640)
at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235)
at org.eclipse.jetty.server.BlockingHttpConnection.handle(BlockingHttpConnection.java:72)
at org.eclipse.jetty.server.bio.SocketConnector$ConnectorEndPoint.run(SocketConnector.java:264)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
at java.lang.Thread.run(Thread.java:724org.apache.solr.search.EarlyTerminatingCollectorException
at org.apache.solr.search.EarlyTerminatingCollector.collect(EarlyTerminatingCollector.java:62)
at org.apache.lucene.search.BooleanScorer2.score(BooleanScorer2.java:289)
at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:624)
at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:297)
at org.apache.solr.search.SolrIndexSearcher.getDocListNC(SolrIndexSearcher.java:1494)
at org.apache.solr.search.SolrIndexSearcher.getDocListC(SolrIndexSearcher.java:1363)
at org.apache.solr.search.SolrIndexSearcher.search(SolrIndexSearcher.java:474)
at org.apache.solr.search.SolrIndexSearcher.getDocList(SolrIndexSearcher.java:1226)
at org.apache.solr.handler.MoreLikeThisHandler$MoreLikeThisHelper.getMoreLikeThis(MoreLikeThisHandler.java:365)
at org.apache.solr.handler.component.MoreLikeThisComponent.getMoreLikeThese(MoreLikeThisComponent.java:356)
at org.apache.solr.handler.component.MoreLikeThisComponent.process(MoreLikeThisComponent.java:113)
at org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:208)
at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:135)
at org.apache.solr.core.SolrCore.execute(SolrCore.java:1904)
at org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:659)
at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:362)
at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:158)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1419)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:455)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:557)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1075)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:384)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1009)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:255)
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:154)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
at org.eclipse.jetty.server.Server.handle(Server.java:368)
at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:489)
at org.eclipse.jetty.server.BlockingHttpConnection.handleRequest(BlockingHttpConnection.java:53)
at org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:942)
at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:1004)
at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:640)
at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235)
at org.eclipse.jetty.server.BlockingHttpConnection.handle(BlockingHttpConnection.java:72)
at org.eclipse.jetty.server.bio.SocketConnector$ConnectorEndPoint.run(SocketConnector.java:264)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
at java.lang.Thread.run(Thread.java:724))
My code worked fine before the update to SOLR 4.4. Any hint what's going on and how to solve it?

Answer 1

Thrown by EarlyTerminatingCollector when the maximum to abort the scoring / collection process early, when the specified maximum number of documents were collected.
This description doesn't sound like a real exception and more like a way to abort the collecting of documents.
#Override
public void collect(int doc) throws IOException {
delegate.collect(doc);
lastDocId = doc;
numCollected++;
if(numCollected==maxDocsToCollect) {
throw new EarlyTerminatingCollectorException(numCollected, lastDocId);
}
}