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// test for SERVER-6303 - if documents move backward during an initial sync.
var rt = new ReplSetTest({name: "replset8tests", nodes: 1});
var nodes = rt.startSet();
rt.initiate();
var master = rt.getPrimary();
var bigstring = "a";
var md = master.getDB('d');
var mdc = md['c'];
// prep the data
// idea: create x documents of increasing size, then create x documents of size n.
// delete first x documents. start initial sync (cloner). update all remaining
// documents to be increasing size.
// this should result in the updates moving the docs backwards.
var doccount = 5000;
// Avoid empty extent issues
mdc.insert({_id: -1, x: "dummy"});
print("inserting bigstrings");
var bulk = mdc.initializeUnorderedBulkOp();
for (i = 0; i < doccount; ++i) {
bulk.insert({_id: i, x: bigstring});
bigstring += "a";
}
assert.writeOK(bulk.execute());
print("inserting x");
bulk = mdc.initializeUnorderedBulkOp();
for (i = doccount; i < doccount * 2; ++i) {
bulk.insert({_id: i, x: i});
}
assert.writeOK(bulk.execute());
print("deleting bigstrings");
bulk = mdc.initializeUnorderedBulkOp();
for (i = 0; i < doccount; ++i) {
bulk.find({_id: i}).remove();
}
assert.writeOK(bulk.execute());
// add a secondary
var slave = rt.add();
rt.reInitiate();
print("initiation complete!");
var sc = slave.getDB('d')['c'];
slave.setSlaveOk();
sleep(25000);
print("updating documents backwards");
// Move all documents to the beginning by growing them to sizes that should
// fit the holes we made in phase 1
bulk = mdc.initializeUnorderedBulkOp();
for (i = doccount * 2; i > doccount; --i) {
mdc.update({_id: i, x: i}, {_id: i, x: bigstring});
bigstring = bigstring.slice(0, -1); // remove last char
}
print("finished");
// Wait for replication to catch up.
rt.awaitSecondaryNodes();
assert.eq(doccount + 1, slave.getDB('d')['c'].find().itcount());
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