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// Tests whether a reset sharding version triggers errors
jsTest.log("Starting sharded cluster...");
var st = new ShardingTest({shards: 1, mongos: 2, verbose: 2});
st.stopBalancer();
var mongosA = st.s0;
var mongosB = st.s1;
jsTest.log("Adding new collections...");
var collA = mongosA.getCollection(jsTestName() + ".coll");
assert.writeOK(collA.insert({hello: "world"}));
var collB = mongosB.getCollection("" + collA);
assert.writeOK(collB.insert({hello: "world"}));
jsTest.log("Enabling sharding...");
printjson(mongosA.getDB("admin").runCommand({enableSharding: "" + collA.getDB()}));
printjson(mongosA.getDB("admin").runCommand({shardCollection: "" + collA, key: {_id: 1}}));
// MongoD doesn't know about the config shard version *until* MongoS tells it
collA.findOne();
jsTest.log("Trigger shard version mismatch...");
assert.writeOK(collB.insert({goodbye: "world"}));
print("Inserted...");
assert.eq(3, collA.find().itcount());
assert.eq(3, collB.find().itcount());
st.stop();
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