[SOLR-9098] Show if schema is currently mutable or not

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Fix Version/s: 7.0
• Component/s: Schema and Analysis
• Assignee: Stefan Matheis
• Reporter: Stefan Matheis
• Created: 10/May/16 12:16
• Updated: 11/May/16 10:43

Description

When our schema is not mutable (for whatever reason) the only way to get that information is to try a change and see if it fails, like this:

$ curl -i localhost:8983/solr/dummy/schema -d '{ "add-field":{ "name":"sell-by", "type":"tdate", "stored":true } }'
HTTP/1.1 200 OK
Content-Type: application/json; charset=UTF-8
Content-Length: 112

{
  "responseHeader":{
    "status":0,
    "QTime":5
  },
  "errors":[
    {
      "errorMessages":"schema is not editable"
    }
  ]
}

this message is caused by SchemaManager#performOperations which checks if schema instanceof ManagedIndexSchema && schema.isMutable() - we could include that information in the response for /schema and allow users to see upfront if they could modify the schema or rather not.

steve_rowe i'm not entirely sure that i didn't miss any tests related to the schema handler, would you mind having a look?