[SOLR-10522] Duplicate keys in "collations" object with JSON response format

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 6.5
• Fix Version/s: 6.6
• Component/s: spellchecker
• Assignee: James Dyer
• Reporter: Nikita Pchelintsev
• Created: 19/Apr/17 16:19
• Updated: 08/Jun/19 15:24
• Resolved: 08/May/17 18:33

Description

After upgrading Solr 6.3 -> 6.5 I've noticed a change in how json response writer outputs "collations" response key when spellchecking is enabled (wt=json&json.nl=arrarr)

Solr 6.3:

"collations":
[
["collation",

{ "collationQuery":"the", "hits":48, "maxScore":"30.282", "misspellingsAndCorrections": [ ["thea","the"]]}

],
["collation",

{ "collationQuery":"tea", "hits":3, "maxScore":"2.936", "misspellingsAndCorrections": [ ["thea","tea"]]}

],
...

Solr 6.5:

"collations":{
"collation":

{ "collationQuery":"the", "hits":43, "misspellingsAndCorrections": [ ["thea","the"]]}

,
"collation":

{ "collationQuery":"tea", "hits":3, "misspellingsAndCorrections": [ ["thea","tea"]]}

,
...

Solr 6.5 outputs object instead of an array, and it has duplicate keys which is not valid for JSON format.

Any help is appreciated.

Issue Links

• is related to: SOLR-10635 json "arrntv" format can sometime produce invalid json
• relates to: SOLR-3029 Poor json formatting of spelling collation info
• relates to: SOLR-9972 SpellCheckComponent to return collations and suggestions as a JSON object rather than a list