[SOLR-13022] JSON Faceting NPE & 500 Error when attempting to sort on non-existent agg (ie: typo)

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 8.3
• Assignee: Munendra S N
• Reporter: Chris M. Hostetter
• Created: 29/Nov/18 15:37
• Updated: 22/Dec/19 05:18
• Resolved: 25/Sep/19 05:37

Description

JSON Faceting does not provide good error handling in the event of a typo / non-existent agg stat name when sorting. the parsing logic happily accepts the bogus sortVariable w/o validation, and the subsequent execution logic trows an NPE when it can't be found.

Request...

curl http://localhost:8983/solr/techproducts/query -d 'rows=0&q=*:*&
json.facet={
  categories:{
    type : terms,
    field : cat,
    sort : "xxxxx desc",
  }
}'

Response...

{
  "responseHeader":{
    "status":500,
    "QTime":1,
    "params":{
      "q":"*:*",
      "json.facet":"{\n  categories:{\n    type : terms,\n    field : cat,\n    sort : \"xxxxx desc\",\n  }\n}",
      "rows":"0"}},
  "response":{"numFound":32,"start":0,"docs":[]
  },
  "error":{
    "trace":"java.lang.NullPointerException\n\tat org.apache.solr.search.facet.FacetFieldProcessor.lambda$findTopSlots$1(FacetFieldProcessor.java:287)
    ...

Issue Links

• contains: SOLR-7879 Null pointer exception when
• is duplicated by: SOLR-13196 NullPointerException in o.a.solr.search.facet.FacetFieldProcessor.findTopSlots()