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Posted to dev@lucene.apache.org by "Christine Poerschke (Jira)" <ji...@apache.org> on 2019/09/02 13:25:00 UTC
[jira] [Updated] (SOLR-13717) Distributed Grouping breaks multi
valued 'fl' param
[ https://issues.apache.org/jira/browse/SOLR-13717?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Christine Poerschke updated SOLR-13717:
---------------------------------------
Attachment: SOLR-13717.patch
> Distributed Grouping breaks multi valued 'fl' param
> ---------------------------------------------------
>
> Key: SOLR-13717
> URL: https://issues.apache.org/jira/browse/SOLR-13717
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Hoss Man
> Assignee: Hoss Man
> Priority: Major
> Attachments: SOLR-13717.patch, SOLR-13717.patch
>
>
> Co-worker discovered a bug with (distributed) grouping when multiple {{fl}} params are specified.
> {{StoredFieldsShardRequestFactory}} has very (old and) brittle code that assumes there will be 0 or 1 {{fl}} params in the original request that it should inspect to see if it needs to append (via string concat) the uniqueKey field onto in order to collate the returned stored fields into their respective (grouped) documents -- and then ignores any additional {{fl}} params that may exist in the original request when it does so.
> The net result is that only the uniqueKey field and whatever fields _are_ specified in the first {{fl}} param specified are fetched from each shard and ultimately returned.
> The only workaround is to replace multiple {{fl}} params with a single {{fl}} param containing a comma seperated list of the requested fields.
> ----
> Bug is trivial to reproduce with {{bin/solr -e cloud -noprompt}} by comparing these requests which should all be equivilent...
> {noformat}
> $ bin/post -c gettingstarted -out yes example/exampledocs/books.csv
> ...
> $ curl 'http://localhost:8983/solr/gettingstarted/query?omitHeader=true&indent=true&fl=author,name,id&q=*:*&group=true&group.field=genre_s'
> {
> "grouped":{
> "genre_s":{
> "matches":10,
> "groups":[{
> "groupValue":"fantasy",
> "doclist":{"numFound":8,"start":0,"maxScore":1.0,"docs":[
> {
> "id":"0812521390",
> "name":["The Black Company"],
> "author":["Glen Cook"]}]
> }},
> {
> "groupValue":"scifi",
> "doclist":{"numFound":2,"start":0,"docs":[
> {
> "id":"0553293354",
> "name":["Foundation"],
> "author":["Isaac Asimov"]}]
> }}]}}}
> $ curl 'http://localhost:8983/solr/gettingstarted/query?omitHeader=true&indent=true&fl=author&fl=name,id&q=*:*&group=true&group.field=genre_s'
> {
> "grouped":{
> "genre_s":{
> "matches":10,
> "groups":[{
> "groupValue":"fantasy",
> "doclist":{"numFound":8,"start":0,"maxScore":1.0,"docs":[
> {
> "id":"0812521390",
> "author":["Glen Cook"]}]
> }},
> {
> "groupValue":"scifi",
> "doclist":{"numFound":2,"start":0,"docs":[
> {
> "id":"0553293354",
> "author":["Isaac Asimov"]}]
> }}]}}}
> $ curl 'http://localhost:8983/solr/gettingstarted/query?omitHeader=true&indent=true&fl=id&fl=author&fl=name&q=*:*&group=true&group.field=genre_s'
> {
> "grouped":{
> "genre_s":{
> "matches":10,
> "groups":[{
> "groupValue":"fantasy",
> "doclist":{"numFound":8,"start":0,"maxScore":1.0,"docs":[
> {
> "id":"0553573403"}]
> }},
> {
> "groupValue":"scifi",
> "doclist":{"numFound":2,"start":0,"docs":[
> {
> "id":"0553293354"}]
> }}]}}}
> {noformat}
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