Groovy script throws java.lang.NoClassDefFoundError: groovy/lang/Reference

[masaruh]

Elasticsearch 2.2.0.

Combination of def keyword and closure gives the exception.

This gives java.lang.NoClassDefFoundError: groovy/lang/Reference:

GET index/_search
{
  "script_fields": {
    "test_script": {
      "script": {
        "inline": "def val = \"\"; p.each{ val += it }; val",
        "params": {
          "p":["aaa", "bbb", "ccc"]
        }
      }
    }
  }
}

This is fine:

GET index/_search
{
  "script_fields": {
    "test_script": {
      "script": {
        "inline": "val = \"\"; p.each{ val += it }; val",
        "params": {
          "p":["aaa", "bbb", "ccc"]
        }
      }
    }
  }
}

Adding permission org.elasticsearch.script.ClassPermission "groovy.lang.Reference" in modules/lang-groovy/plugin-security.policy seems to fix the issue.

[jasontedor]

Closed by #16660