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//
// Tests pending chunk metadata.
//
(function() {
"use strict";
var st = new ShardingTest({shards: 2, mongos: 2, other: {separateConfig: true}});
var mongos = st.s0;
var admin = mongos.getDB('admin');
var shards = mongos.getCollection('config.shards').find().toArray();
var coll = mongos.getCollection('foo.bar');
var ns = coll.getFullName();
var dbName = coll.getDB().getName();
var shard0 = st.shard0, shard1 = st.shard1;
assert.commandWorked(admin.runCommand({enableSharding: dbName}));
printjson(admin.runCommand({movePrimary: dbName, to: shards[0]._id}));
assert.commandWorked(admin.runCommand({shardCollection: ns, key: {_id: 1}}));
jsTest.log('Moving some chunks to shard1...');
assert.commandWorked(admin.runCommand({split: ns, middle: {_id: 0}}));
assert.commandWorked(admin.runCommand({split: ns, middle: {_id: 1}}));
assert.commandWorked(admin.runCommand(
{moveChunk: ns, find: {_id: 0}, to: shards[1]._id, _waitForDelete: true}));
assert.commandWorked(admin.runCommand(
{moveChunk: ns, find: {_id: 1}, to: shards[1]._id, _waitForDelete: true}));
function getMetadata(shard) {
var admin = shard.getDB('admin'),
metadata = admin.runCommand({getShardVersion: ns, fullMetadata: true}).metadata;
jsTest.log('Got metadata: ' + tojson(metadata));
return metadata;
}
var metadata = getMetadata(shard1);
assert.eq(metadata.pending[0][0]._id, 1);
assert.eq(metadata.pending[0][1]._id, MaxKey);
jsTest.log('Moving some chunks back to shard0 after empty...');
assert.commandWorked(admin.runCommand(
{moveChunk: ns, find: {_id: -1}, to: shards[1]._id, _waitForDelete: true}));
metadata = getMetadata(shard0);
assert.eq(metadata.shardVersion.t, 0);
assert.neq(metadata.collVersion.t, 0);
assert.eq(metadata.pending.length, 0);
assert.commandWorked(admin.runCommand(
{moveChunk: ns, find: {_id: 1}, to: shards[0]._id, _waitForDelete: true}));
metadata = getMetadata(shard0);
assert.eq(metadata.shardVersion.t, 0);
assert.neq(metadata.collVersion.t, 0);
assert.eq(metadata.pending[0][0]._id, 1);
assert.eq(metadata.pending[0][1]._id, MaxKey);
// The pending chunk should be promoted to a real chunk when shard0 reloads
// its config.
jsTest.log('Checking that pending chunk is promoted on reload...');
assert.eq(null, coll.findOne({_id: 1}));
metadata = getMetadata(shard0);
assert.neq(metadata.shardVersion.t, 0);
assert.neq(metadata.collVersion.t, 0);
assert.eq(metadata.chunks[0][0]._id, 1);
assert.eq(metadata.chunks[0][1]._id, MaxKey);
st.printShardingStatus();
st.stop();
})();
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