diff options
Diffstat (limited to 'jstests/sharding/balancing_sessions_collection_reshard.js')
-rw-r--r-- | jstests/sharding/balancing_sessions_collection_reshard.js | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/jstests/sharding/balancing_sessions_collection_reshard.js b/jstests/sharding/balancing_sessions_collection_reshard.js new file mode 100644 index 00000000000..fe34ed34116 --- /dev/null +++ b/jstests/sharding/balancing_sessions_collection_reshard.js @@ -0,0 +1,55 @@ +/* + * Tests that the balancer does not split the chunks for the sessions collection + * if the shard key is not _id. + */ +(function() { + "use strict"; + + let numShards = 2; + const kMinNumChunks = 2; + const clusterName = jsTest.name(); + const st = new ShardingTest({ + name: clusterName, + shards: numShards, + other: + {configOptions: {setParameter: {minNumChunksForSessionsCollection: kMinNumChunks}}} + }); + + let waitForBalancerToRun = function() { + let lastRoundNumber = + assert.commandWorked(st.s.adminCommand({balancerStatus: 1})).numBalancerRounds; + st.startBalancer(); + + assert.soon(function() { + let res = assert.commandWorked(st.s.adminCommand({balancerStatus: 1})); + return res.mode == "full" && res.numBalancerRounds - lastRoundNumber > 1; + }); + + st.stopBalancer(); + }; + + const kSessionsNs = "config.system.sessions"; + let configDB = st.s.getDB("config"); + + jsTest.log("Verify that the sessions collection is successfully dropped."); + + assert.commandWorked(configDB.runCommand({drop: "system.sessions"})); + + jsTest.log("Verify that the sessions collection is successfully recreated and resharded."); + + assert.commandWorked(st.s.adminCommand({enableSharding: "config"})); + assert.commandWorked(st.s.adminCommand({shardCollection: kSessionsNs, key: {oldRoles: 1}})); + + jsTest.log("Verify that balancer does not fail after resharding."); + waitForBalancerToRun(); + + jsTest.log("Verify that there is a single chunk for the collection " + + "and the bounds are the resharded key."); + assert.eq(1, configDB.chunks.count({ns: kSessionsNs})); + + let doc = configDB.chunks.findOne({ns: kSessionsNs}); + assert(doc.min.hasOwnProperty("oldRoles")); + assert(doc.max.hasOwnProperty("oldRoles")); + + st.stop(); +}()); |