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SERVER-28447 Forward-port migration_critical_section_concurrency.js
This test ensures that while query and write on one collection are stuck in the migration critical section, other collections are not impacted.
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jstests/sharding/migration_critical_section_concurrency.js
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// This test ensures that if one collection is its migration critical section, this won't stall | ||
// operations for other sharded or unsharded collections | ||
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load('./jstests/libs/chunk_manipulation_util.js'); | ||
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(function() { | ||
'use strict'; | ||
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var staticMongod = MongoRunner.runMongod({}); // For startParallelOps. | ||
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var st = new ShardingTest({mongos: 1, shards: 2}); | ||
assert.commandWorked(st.s0.adminCommand({enableSharding: 'TestDB'})); | ||
st.ensurePrimaryShard('TestDB', st.shard0.shardName); | ||
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var testDB = st.s0.getDB('TestDB'); | ||
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assert.commandWorked(st.s0.adminCommand({shardCollection: 'TestDB.Coll0', key: {Key: 1}})); | ||
assert.commandWorked(st.s0.adminCommand({split: 'TestDB.Coll0', middle: {Key: 0}})); | ||
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var coll0 = testDB.Coll0; | ||
assert.writeOK(coll0.insert({Key: -1, Value: '-1'})); | ||
assert.writeOK(coll0.insert({Key: 1, Value: '1'})); | ||
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assert.commandWorked(st.s0.adminCommand({shardCollection: 'TestDB.Coll1', key: {Key: 1}})); | ||
assert.commandWorked(st.s0.adminCommand({split: 'TestDB.Coll1', middle: {Key: 0}})); | ||
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var coll1 = testDB.Coll1; | ||
assert.writeOK(coll1.insert({Key: -1, Value: '-1'})); | ||
assert.writeOK(coll1.insert({Key: 1, Value: '1'})); | ||
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// Ensure that coll0 has chunks on both shards so we can test queries against both donor and | ||
// recipient for Coll1's migration below | ||
assert.commandWorked( | ||
st.s0.adminCommand({moveChunk: 'TestDB.Coll0', find: {Key: 1}, to: st.shard1.shardName})); | ||
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// Pause the move chunk operation in the critical section | ||
pauseMigrateAtStep(st.shard1, migrateStepNames.done); | ||
var joinMoveChunk = moveChunkParallel( | ||
staticMongod, st.s0.host, {Key: 1}, null, 'TestDB.Coll1', st.shard1.shardName); | ||
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// Wait till the donor reaches the critical section | ||
waitForMoveChunkStep(st.shard0, moveChunkStepNames.reachedSteadyState); | ||
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// Ensure that operations for 'Coll0' are not stalled | ||
assert.eq(1, coll0.find({Key: {$lte: -1}}).maxTimeMS(5000).itcount()); | ||
assert.eq(1, coll0.find({Key: {$gte: 1}}).maxTimeMS(5000).itcount()); | ||
assert.writeOK(coll0.insert({Key: -2, Value: '-2'}, {writeConcern: {wtimeout: 5000}})); | ||
assert.writeOK(coll0.insert({Key: 2, Value: '2'}, {writeConcern: {wtimeout: 5000}})); | ||
assert.eq(2, coll0.find({Key: {$lte: -1}}).maxTimeMS(5000).itcount()); | ||
assert.eq(2, coll0.find({Key: {$gte: 1}}).maxTimeMS(5000).itcount()); | ||
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// Ensure that operations for non-sharded collections are not stalled | ||
var collUnsharded = testDB.CollUnsharded; | ||
assert.eq(0, collUnsharded.find({}).maxTimeMS(5000).itcount()); | ||
assert.writeOK( | ||
collUnsharded.insert({TestKey: 0, Value: 'Zero'}, {writeConcern: {wtimeout: 5000}})); | ||
assert.eq(1, collUnsharded.find({}).maxTimeMS(5000).itcount()); | ||
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unpauseMigrateAtStep(st.shard1, migrateStepNames.done); | ||
joinMoveChunk(); | ||
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st.stop(); | ||
})(); |