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Posted to issues@solr.apache.org by "David Smiley (Jira)" <ji...@apache.org> on 2021/08/13 04:04:00 UTC

[jira] [Reopened] (SOLR-14758) NPE in QueryComponent.mergeIds when using timeAllowed and sorting

     [ https://issues.apache.org/jira/browse/SOLR-14758?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

David Smiley reopened SOLR-14758:
---------------------------------

Tim observed that this commit triggers frequent failures on CI: http://fucit.org/solr-jenkins-reports/history-trend-of-recent-failures.html#series/org.apache.solr.handler.component.DistributedQueryComponentCustomSortTest.test

> NPE in QueryComponent.mergeIds when using timeAllowed and sorting
> -----------------------------------------------------------------
>
>                 Key: SOLR-14758
>                 URL: https://issues.apache.org/jira/browse/SOLR-14758
>             Project: Solr
>          Issue Type: Bug
>          Components: SolrCloud
>    Affects Versions: 7.7.3, 8.6.3, main (9.0), 8.8.1, 8.8.2
>            Reporter: Bram Van Dam
>            Assignee: Uwe Schindler
>            Priority: Major
>             Fix For: main (9.0), 8.10
>
>         Attachments: SOLR-14758.patch, SOLR-14758.patch
>
>          Time Spent: 1h
>  Remaining Estimate: 0h
>
> Only tested on 7.7.3 and master, but the offending code hasn't been changed for a while, so this presumably affects other versions as well. 
> Steps to reproduce:
> # SolrCloud
> # Create a query which is complex enough to take a while
> # Add a sort clause to the query (e.g. &sort=creationTimestamp asc)
> # Add a short value timeAllowed (10ms in my test)
> Result: NPE in QueryComponent.mergeIds:935
> It may take a couple of attempts to hit the error.
> Offending code:
> {code:java}
>         NamedList sortFieldValues = (NamedList)(srsp.getSolrResponse().getResponse().get("sort_values"));
>         if (sortFieldValues.size()==0 && // we bypass merging this response only if it's partial itself
>                             thisResponseIsPartial) { // but not the previous one!!
>           continue; //fsv timeout yields empty sort_vlaues
>         }
> {code}
> sortFieldValues can apparently be null in some cases, depending on when the query hits the timeAllowed. Adding an extra null check fixes the issue.
> {code:java}
>         NamedList sortFieldValues = (NamedList)(srsp.getSolrResponse().getResponse().get("sort_values"));
>         if ((null == sortFieldValues || sortFieldValues.size()==0) && // we bypass merging this response only if it's partial itself
>                             thisResponseIsPartial) { // but not the previous one!!
>           continue; //fsv timeout yields empty sort_vlaues
>         }
> {code}
> I'll attach a patch.



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