mongodb/jstests/noPassthrough/update_server-5552.js

load("jstests/libs/slow_weekly_util.js");
testServer = new SlowWeeklyMongod("update_server-5552");
db = testServer.getDB("test");

t = db.foo;
t.drop();

N = 10000;

var bulk = t.initializeUnorderedBulkOp();
for (i = 0; i < N; i++) {
    bulk.insert({_id: i, x: 1});
}
assert.writeOK(bulk.execute());

join = startParallelShell(
    "while( db.foo.findOne( { _id : 0 } ).x == 1 ); db.foo.ensureIndex( { x : 1 } );");

t.update({
    $where: function() {
        sleep(1);
        return true;
    }
},
         {$set: {x: 5}},
         false,
         true);
db.getLastError();

join();

assert.eq(N, t.find({x: 5}).count());

testServer.stop();