[js_test:hash_lookup_unwind] 2025-12-18T08:35:45.881Z assert: command failed: {
[js_test:hash_lookup_unwind] 	"ok" : 0,
[js_test:hash_lookup_unwind] 	"errmsg" : "Encountered unexpected array in NDV computation",
[js_test:hash_lookup_unwind] 	"code" : 11158502,
[js_test:hash_lookup_unwind] 	"codeName" : "Location11158502"
[js_test:hash_lookup_unwind] } with original command request: {
[js_test:hash_lookup_unwind] 	"aggregate" : "hash_lookup_unwind_animals",
[js_test:hash_lookup_unwind] 	"pipeline" : [
[js_test:hash_lookup_unwind] 		{
[js_test:hash_lookup_unwind] 			"$lookup" : {
[js_test:hash_lookup_unwind] 				"from" : "hash_lookup_unwind_locations",
[js_test:hash_lookup_unwind] 				"localField" : "locationName",
[js_test:hash_lookup_unwind] 				"foreignField" : "name",
[js_test:hash_lookup_unwind] 				"as" : "location"
[js_test:hash_lookup_unwind] 			}
[js_test:hash_lookup_unwind] 		},
[js_test:hash_lookup_unwind] 		{
[js_test:hash_lookup_unwind] 			"$unwind" : "$location"
[js_test:hash_lookup_unwind] 		},
[js_test:hash_lookup_unwind] 		{
[js_test:hash_lookup_unwind] 			"$project" : {
[js_test:hash_lookup_unwind] 				"locationName" : false,
[js_test:hash_lookup_unwind] 				"location.extra" : false,
[js_test:hash_lookup_unwind] 				"location.coordinates" : false,
[js_test:hash_lookup_unwind] 				"colors" : false
[js_test:hash_lookup_unwind] 			}
[js_test:hash_lookup_unwind] 		}
[js_test:hash_lookup_unwind] 	],
[js_test:hash_lookup_unwind] 	"explain" : true,
[js_test:hash_lookup_unwind] 	"cursor" : {
[js_test:hash_lookup_unwind]
[js_test:hash_lookup_unwind] 	},
[js_test:hash_lookup_unwind] 	"lsid" : {
[js_test:hash_lookup_unwind] 		"id" : UUID("de7bfd28-d3d4-47f1-bce3-da4e4b96e977")
[js_test:hash_lookup_unwind] 	},
[js_test:hash_lookup_unwind] 	"$traceCtx" : {
[js_test:hash_lookup_unwind] 		"traceparent" : "00-c4a42894695efa9a5452ef3f3bb5122b-e312b14847f37018-01"
[js_test:hash_lookup_unwind] 	}
[js_test:hash_lookup_unwind] } on connection: connection to localhost:20750 with errmsg: Encountered unexpected array in NDV computation : aggregate failed
[js_test:hash_lookup_unwind] _getErrorWithCode@src/mongo/shell/utils.js:21:13
[js_test:hash_lookup_unwind] doassert@src/mongo/shell/assert.js:46:14
[js_test:hash_lookup_unwind] _doassert@src/mongo/shell/assert.js:160:13
[js_test:hash_lookup_unwind] _assertCommandWorked@src/mongo/shell/assert.js:1185:22
[js_test:hash_lookup_unwind] assert.commandWorked@src/mongo/shell/assert.js:1349:12
[js_test:hash_lookup_unwind] DB.prototype._runAggregate@src/mongo/shell/db.js:302:12
[js_test:hash_lookup_unwind] DBCollection.prototype.aggregate@src/mongo/shell/collection.js:1140:21
[js_test:hash_lookup_unwind] Explainable/this.aggregate@src/mongo/shell/explainable.js:119:37
[js_test:hash_lookup_unwind] @jstests/core/query/release_memory/hash_lookup_unwind.js:99:35