SERVER-50475 Put data on both shards in mr_noscripting.js

(cherry picked from commit e213ad984d8f72560ab14bb63c0c7dbdb9cc4efa)

1 files changed, 13 insertions, 5 deletions

diff --git a/jstests/sharding/mr_noscripting.js b/jstests/sharding/mr_noscripting.js
index dd4c2d83f9b..f4b477ed1c5 100644
--- a/jstests/sharding/mr_noscripting.js
+++ b/jstests/sharding/mr_noscripting.js
@@ -13,10 +13,9 @@ const mongos = st.s;
 const testDB = mongos.getDB('test');
 const coll = testDB.bar;
 
-// Shard the collection and make sure there is a chunk on each shard.
+// Shard the collection and make sure there is a non-empty chunk on each shard.
 st.shardColl(coll.getName(), {x: 1}, {x: 0}, {x: 1});
-
-assert.commandWorked(coll.insert({x: 1}));
+assert.commandWorked(coll.insert([{x: 1}, {x: -1}]));
 
 const mapFn = function() {
     emit(this.x, 1);
@@ -26,8 +25,17 @@ const reduceFn = function(key, values) {
     return 1;
 };
 
-assert.commandFailedWithCode(
-    testDB.runCommand({mapreduce: 'bar', map: mapFn, reduce: reduceFn, out: {inline: 1}}), 31264);
+const mrCmd = {
+    mapreduce: 'bar',
+    map: mapFn,
+    reduce: reduceFn,
+    out: {inline: 1}
+};
+// If the command succeeds when it should have failed, having the explain plan in the log may help.
+assert.commandFailedWithCode(testDB.runCommand(mrCmd), 31264, () => {
+    const explain = tojson(testDB.runCommand({explain: mrCmd}));
+    return `mapReduce command was expected to fail, but succeeded; explain plan is ${explain}`;
+});
 
 st.stop();
 }());