var st = new ShardingTest({ shards: 2, mongos: 2 }); st.stopBalancer(); var configDB = st.s.getDB( 'config' ); configDB.adminCommand({ enableSharding: 'test' }); configDB.adminCommand({ shardCollection: 'test.user' , key: { x: 1 }}); configDB.adminCommand({ split: 'test.user' , middle: { x: 0 }}); var configDB2 = st.s1.getDB( 'config' ); configDB2.adminCommand({ mergeChunks: 'test.user' , bounds: [{ x: MinKey }, { x: MaxKey }]}); // This test will pass if flushRouterConfig is called here. var res = configDB.adminCommand({ split: 'test.user' , middle: { x: 0 }}); assert (res.ok, 'command failed: ' + tojson(res)); st.stop();