/**
 * Test to make sure that transactions doesn't block shard version metadata refresh.
 *
 * @tags: [uses_transactions, uses_multi_shard_transaction]
 */

(function() {
"use strict";

var staticMongod = MongoRunner.runMongod({});  // For startParallelOps.

let st = new ShardingTest({shards: 2, other: {shardOptions: {verbose: 1}}});

assert.commandWorked(st.s.adminCommand({enableSharding: 'test'}));
st.ensurePrimaryShard('test', st.shard0.shardName);
assert.commandWorked(st.s.adminCommand({shardCollection: 'test.user', key: {x: 1}}));
assert.commandWorked(st.s.adminCommand({split: 'test.user', middle: {x: 42}}));
assert.commandWorked(
    st.s.adminCommand({moveChunk: 'test.user', find: {x: 42}, to: st.shard1.shardName}));

// Send a normal write to establish the shard versions outside the transaction.
assert.commandWorked(st.s.getDB('test').runCommand({
    insert: 'user',
    documents: [{x: 41}, {x: 42}],
}));

let lsid = {id: UUID()};
let txnNumber = 0;

assert.commandWorked(st.s.getDB('test').runCommand({
    insert: 'user',
    documents: [{x: 40}, {x: 43}],
    lsid: lsid,
    txnNumber: NumberLong(txnNumber),
    stmtId: NumberInt(0),
    startTransaction: true,
    autocommit: false,
}));

// Bumping the collection version on the config server without involving any shard
var collUuid = st.config.collections.findOne({_id: 'test.user'}).uuid;
assert.commandWorked(st.config.chunks.updateOne({uuid: collUuid, min: {x: 42}},
                                                {$set: {lastmod: Timestamp(100, 0)}}));

// Flushing the routing information on the mongos, so next time it needs this information it will
// perfom a full refresh and will discover the new collection version
assert.commandWorked(st.s.adminCommand({flushRouterConfig: 1}));

// Make the transaction stay in prepared state so it will hold on to the collection locks.
assert.commandWorked(st.rs0.getPrimary().getDB('admin').runCommand(
    {configureFailPoint: 'hangBeforeWritingDecision', mode: 'alwaysOn'}));
assert.commandWorked(st.rs1.getPrimary().getDB('admin').runCommand(
    {configureFailPoint: 'hangBeforeWritingDecision', mode: 'alwaysOn'}));

const runCommitCode = "db.adminCommand({" +
    "commitTransaction: 1," +
    "lsid: " + tojson(lsid) + "," +
    "txnNumber: NumberLong(" + txnNumber + ")," +
    "stmtId: NumberInt(0)," +
    "autocommit: false," +
    "});";
let commitTxn = startParallelShell(runCommitCode, st.s.port);

// Insert should be able to refresh the sharding metadata even with existing transactions
// holding the collection lock in IX.
assert.commandWorked(
    st.s.getDB('test').runCommand({insert: 'user', documents: [{x: 44}], maxTimeMS: 5 * 1000}));

assert.commandWorked(st.rs0.getPrimary().getDB('admin').runCommand(
    {configureFailPoint: 'hangBeforeWritingDecision', mode: 'off'}));
assert.commandWorked(st.rs1.getPrimary().getDB('admin').runCommand(
    {configureFailPoint: 'hangBeforeWritingDecision', mode: 'off'}));
commitTxn();

st.stop();
MongoRunner.stopMongod(staticMongod);
})();