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https://issues.apache.org/jira/browse/SOLR-15071?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17262458#comment-17262458
]
Florin Babes commented on SOLR-15071:
-------------------------------------
Thanks for the hints [~cpoerschke].
We've managed to reproduce the issue using the techproducts example and
indexing some of our documents.
The mm.autoRelax didn't help, same error. Same with using fq in features.
We tried to debug the issue using intellij remote debug and we found the
following difference. In 8.6.3 is called this method
org/apache/lucene/search/MinShouldMatchSumScorer.java:updateFreq and is not
called in 8.5.2. We've tried to find the main cause but without succes.
The above method leads here org/apache/lucene/search/DisiPriorityQueue.java:add
and at this line heap[size] = entry; the exception is triggered. It looks like
the heap is not initialized with enough space for all terms.
> Bug on LTR when using solr 8.6.3 - index out of bounds
> DisiPriorityQueue.add(DisiPriorityQueue.java:102)
> --------------------------------------------------------------------------------------------------------
>
> Key: SOLR-15071
> URL: https://issues.apache.org/jira/browse/SOLR-15071
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Components: contrib - LTR
> Affects Versions: 8.6, 8.7
> Reporter: Florin Babes
> Priority: Major
> Labels: ltr
>
> Hello,
> We are trying to update Solr from 8.3.1 to 8.6.3. On Solr 8.3.1 we are
> using LTR in production using a MultipleAdditiveTrees model. On Solr 8.6.3
> we receive an error when we try to compute some SolrFeatures. We didn't
> find any pattern of the queries that fail.
> Example:
> We have the following query raw parameters:
> q=lg cx 4k oled 120 hz -> just of many examples
> term_dq=lg cx 4k oled 120 hz
> rq={!ltr model=model reRankDocs=1000 store=feature_store
> efi.term=${term_dq}}
> defType=edismax,
> mm=2<75%
> The features are something like this:
> {
> "name":"similarity_query_fileld_1",
> "class":"org.apache.solr.ltr.feature.SolrFeature",
> "params":\{"q":"{!dismax qf=query_field_1 mm=1}${term}"},
> "store":"feature_store"
> },
> {
> "name":"similarity_query_field_2",
> "class":"org.apache.solr.ltr.feature.SolrFeature",
> "params":\{"q":"{!dismax qf=query_field_2 mm=5}${term}"},
> "store":"feature_store"
> }
> We are testing ~6300 production queries and for about 1% of them we receive
> that following error message:
> "metadata":[
> "error-class","org.apache.solr.common.SolrException",
> "root-error-class","java.lang.ArrayIndexOutOfBoundsException"],
> "msg":"java.lang.ArrayIndexOutOfBoundsException: Index 2 out of bounds
> for length 2",
> The stacktrace is :
> org.apache.solr.common.SolrException:
> java.lang.ArrayIndexOutOfBoundsException: Index 2 out of bounds for length 2
> at org.apache.solr.search.ReRankCollector.topDocs(ReRankCollector.java:154)
> at
> org.apache.solr.search.SolrIndexSearcher.getDocListNC(SolrIndexSearcher.java:159
> 9)
> at
> org.apache.solr.search.SolrIndexSearcher.getDocListC(SolrIndexSearcher.java:1413
> )
> at
> org.apache.solr.search.SolrIndexSearcher.search(SolrIndexSearcher.java:596)
> at
> org.apache.solr.handler.component.QueryComponent.doProcessUngroupedSearch(QueryC
> omponent.java:1513)
> at
> org.apache.solr.handler.component.QueryComponent.process(QueryComponent.java:403
> )
> at
> org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.
> java:360)
> at
> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java
> :214)
> at org.apache.solr.core.SolrCore.execute(SolrCore.java:2627)
> at org.apache.solr.servlet.HttpSolrCall.execute(HttpSolrCall.java:795)
> at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:568)
> at
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:415)
> at
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:345)
> at
> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.jav
> a:1596)
> at
> org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:545)
> at
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
> at
> org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:590)
> at
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
> at
> org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:235
> )
> at
> org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:161
> 0)
> at
> org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233
> )
> at
> org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:130
> 0)
> at
> org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)
> at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:485)
> at
> org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1580
> )
> at
> org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)
> at
> org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1215
> )
> at
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
> at
> org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerC
> ollection.java:221)
> at
> org.eclipse.jetty.server.handler.InetAccessHandler.handle(InetAccessHandler.java
> :177)
> at
> org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java
> :146)
> at
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
> at
> org.eclipse.jetty.rewrite.handler.RewriteHandler.handle(RewriteHandler.java:322)
> at
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
> at org.eclipse.jetty.server.Server.handle(Server.java:500)
> at
> org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:383)
> at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:547)
> at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:375)
> at
> org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:273)
> at
> org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnectio
> n.java:311)
> at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
> at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:117)
> at
> org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.jav
> a:336)
> at
> org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.j
> ava:313)
> at
> org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.
> java:171)
> at
> org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:12
> 9)
> at
> org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(Reserved
> ThreadExecutor.java:375)
> at
> org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:806)
> at
> org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:
> 938)
> at java.base/java.lang.Thread.run(Thread.java:834)
> Caused by: java.lang.ArrayIndexOutOfBoundsException: Index 2 out of bounds
> for length 2
> at
> org.apache.lucene.search.DisiPriorityQueue.add(DisiPriorityQueue.java:102)
> at
> org.apache.lucene.search.MinShouldMatchSumScorer.advanceTail(MinShouldMatchSumSc
> orer.java:246)
> at
> org.apache.lucene.search.MinShouldMatchSumScorer.updateFreq(MinShouldMatchSumSco
> rer.java:312)
> at
> org.apache.lucene.search.MinShouldMatchSumScorer.score(MinShouldMatchSumScorer.j
> ava:320)
> at
> org.apache.solr.ltr.feature.SolrFeature$SolrFeatureWeight$SolrFeatureScorer.scor
> e(SolrFeature.java:242)
> at
> org.apache.solr.ltr.LTRScoringQuery$ModelWeight$ModelScorer$SparseModelScorer.sc
> ore(LTRScoringQuery.java:595)
> at
> org.apache.solr.ltr.LTRScoringQuery$ModelWeight$ModelScorer.score(LTRScoringQuer
> y.java:540)
> at org.apache.solr.ltr.LTRRescorer.scoreFeatures(LTRRescorer.java:183)
> at org.apache.solr.ltr.LTRRescorer.rescore(LTRRescorer.java:122)
> at org.apache.solr.search.ReRankCollector.topDocs(ReRankCollector.java:119)
>
> Based on [~cpoerschke] suggestions we detailed the following:
> Reproducibility: We can reproduce the same queries on multiple runs, with the
> same error.
> Data as a factor: Our setup is single-sharded, so we can't investigate
> further on this.
> Feature vs. Model: We've also tried a dummy LinearModel with only two
> features and the problem still occurs.
> Identification of the troublesome feature(s): We've narrowed our model to
> only two features and the problem always occurs (for some queries, not all)
> when we have a feature with a mm=1 and a feature with a mm>=3. The problem
> also occurs when we only do feature extraction and the problem seems to
> always occur on the feature with the bigger mm. The errors seem to be related
> to the size of the head DisiPriorityQueue created here:
> https://github.com/apache/lucene-solr/blob/branch_8_6/lucene/core/src/java/org/apache/lucene/search/MinShouldMatchSumScorer.java#L107
> as the error changes as we change the mm for the second feature:
>
> 1 feature with mm=1 and one with mm=3 -> Index 4 out of bounds for length 4
> 1 feature with mm=1 and one with mm=5 -> Index 2 out of bounds for length 2
>
> You can find below the dummy feature-store.
>
> [
> {
> "store": "dummystore",
> "name": "similarity_name_mm_1",
> "class": "org.apache.solr.ltr.feature.SolrFeature",
> "params": {
> "q": "\{!dismax qf=name mm=1}${term}"
> }
> },
> {
> "store": "dummystore",
> "name": "similarity_names_mm_3",
> "class": "org.apache.solr.ltr.feature.SolrFeature",
> "params": {
> "q": "\{!dismax qf=name mm=3}${term}"
> }
> }
> ]
>
> The problem starts occuring in Solr 8.6.0, as we tried multiple versions <
> 8.6 and >= 8.6 and the problem started on 8.6.0 and we tend to believe it's
> because of the following changes:
> https://issues.apache.org/jira/browse/SOLR-14364 as they're the only major
> changes related to LTR which were introduced in Solr 8.6.0.
>
> Thanks.
>
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