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|
//
// Tests mongos's failure tolerance for replica set shards and read preference queries
//
// Sets up a cluster with three shards, the first shard of which has an unsharded collection and
// half a sharded collection. The second shard has the second half of the sharded collection, and
// the third shard has nothing. Progressively shuts down the primary of each shard to see the
// impact on the cluster.
//
// Three different connection states are tested - active (connection is active through whole
// sequence), idle (connection is connected but not used before a shard change), and new
// (connection connected after shard change).
//
// Checking UUID and index consistency involves talking to shard primaries, but by the end of this
// test, one shard does not have a primary.
TestData.skipCheckingUUIDsConsistentAcrossCluster = true;
TestData.skipCheckingIndexesConsistentAcrossCluster = true;
TestData.skipCheckOrphans = true;
(function() {
'use strict';
var st = new ShardingTest({shards: 3, mongos: 1, other: {rs: true, rsOptions: {nodes: 2}}});
var mongos = st.s0;
var admin = mongos.getDB("admin");
assert.commandWorked(admin.runCommand({setParameter: 1, traceExceptions: true}));
var collSharded = mongos.getCollection("fooSharded.barSharded");
var collUnsharded = mongos.getCollection("fooUnsharded.barUnsharded");
// Create the unsharded database
assert.commandWorked(collUnsharded.insert({some: "doc"}));
assert.commandWorked(collUnsharded.remove({}));
assert.commandWorked(
admin.runCommand({movePrimary: collUnsharded.getDB().toString(), to: st.shard0.shardName}));
// Create the sharded database
assert.commandWorked(admin.runCommand({enableSharding: collSharded.getDB().toString()}));
assert.commandWorked(
admin.runCommand({movePrimary: collSharded.getDB().toString(), to: st.shard0.shardName}));
assert.commandWorked(admin.runCommand({shardCollection: collSharded.toString(), key: {_id: 1}}));
assert.commandWorked(admin.runCommand({split: collSharded.toString(), middle: {_id: 0}}));
assert.commandWorked(
admin.runCommand({moveChunk: collSharded.toString(), find: {_id: 0}, to: st.shard1.shardName}));
// Secondaries do not refresh their in-memory routing table until a request with a higher
// version is received, and refreshing requires communication with the primary to obtain the
// newest version. Read from the secondaries once before taking down primaries to ensure they
// have loaded the routing table into memory.
// TODO SERVER-30148: replace this with calls to awaitReplication() on each shard owning data
// for the sharded collection once secondaries refresh proactively.
var mongosSetupConn = new Mongo(mongos.host);
mongosSetupConn.setReadPref("secondary");
assert(!mongosSetupConn.getCollection(collSharded.toString()).find({}).hasNext());
gc(); // Clean up connections
st.printShardingStatus();
//
// Setup is complete
//
jsTest.log("Inserting initial data...");
var mongosConnActive = new Mongo(mongos.host);
var mongosConnIdle = null;
var mongosConnNew = null;
var wc = {writeConcern: {w: 2, wtimeout: 60000}};
assert.commandWorked(mongosConnActive.getCollection(collSharded.toString()).insert({_id: -1}, wc));
assert.commandWorked(mongosConnActive.getCollection(collSharded.toString()).insert({_id: 1}, wc));
assert.commandWorked(mongosConnActive.getCollection(collUnsharded.toString()).insert({_id: 1}, wc));
jsTest.log("Stopping primary of third shard...");
mongosConnIdle = new Mongo(mongos.host);
st.rs2.stop(st.rs2.getPrimary());
jsTest.log("Testing active connection with third primary down...");
assert.neq(null, mongosConnActive.getCollection(collSharded.toString()).findOne({_id: -1}));
assert.neq(null, mongosConnActive.getCollection(collSharded.toString()).findOne({_id: 1}));
assert.neq(null, mongosConnActive.getCollection(collUnsharded.toString()).findOne({_id: 1}));
assert.commandWorked(mongosConnActive.getCollection(collSharded.toString()).insert({_id: -2}, wc));
assert.commandWorked(mongosConnActive.getCollection(collSharded.toString()).insert({_id: 2}, wc));
assert.commandWorked(mongosConnActive.getCollection(collUnsharded.toString()).insert({_id: 2}, wc));
jsTest.log("Testing idle connection with third primary down...");
assert.commandWorked(mongosConnIdle.getCollection(collSharded.toString()).insert({_id: -3}, wc));
assert.commandWorked(mongosConnIdle.getCollection(collSharded.toString()).insert({_id: 3}, wc));
assert.commandWorked(mongosConnIdle.getCollection(collUnsharded.toString()).insert({_id: 3}, wc));
assert.neq(null, mongosConnIdle.getCollection(collSharded.toString()).findOne({_id: -1}));
assert.neq(null, mongosConnIdle.getCollection(collSharded.toString()).findOne({_id: 1}));
assert.neq(null, mongosConnIdle.getCollection(collUnsharded.toString()).findOne({_id: 1}));
jsTest.log("Testing new connections with third primary down...");
mongosConnNew = new Mongo(mongos.host);
assert.neq(null, mongosConnNew.getCollection(collSharded.toString()).findOne({_id: -1}));
mongosConnNew = new Mongo(mongos.host);
assert.neq(null, mongosConnNew.getCollection(collSharded.toString()).findOne({_id: 1}));
mongosConnNew = new Mongo(mongos.host);
assert.neq(null, mongosConnNew.getCollection(collUnsharded.toString()).findOne({_id: 1}));
mongosConnNew = new Mongo(mongos.host);
assert.commandWorked(mongosConnNew.getCollection(collSharded.toString()).insert({_id: -4}, wc));
mongosConnNew = new Mongo(mongos.host);
assert.commandWorked(mongosConnNew.getCollection(collSharded.toString()).insert({_id: 4}, wc));
mongosConnNew = new Mongo(mongos.host);
assert.commandWorked(mongosConnNew.getCollection(collUnsharded.toString()).insert({_id: 4}, wc));
gc(); // Clean up new connections
jsTest.log("Stopping primary of second shard...");
mongosConnIdle = new Mongo(mongos.host);
// Need to save this node for later
var rs1Secondary = st.rs1.getSecondary();
st.rs1.stop(st.rs1.getPrimary());
jsTest.log("Testing active connection with second primary down...");
// Reads with read prefs
mongosConnActive.setSlaveOk();
assert.neq(null, mongosConnActive.getCollection(collSharded.toString()).findOne({_id: -1}));
assert.neq(null, mongosConnActive.getCollection(collSharded.toString()).findOne({_id: 1}));
assert.neq(null, mongosConnActive.getCollection(collUnsharded.toString()).findOne({_id: 1}));
mongosConnActive.setSlaveOk(false);
mongosConnActive.setReadPref("primary");
assert.neq(null, mongosConnActive.getCollection(collSharded.toString()).findOne({_id: -1}));
assert.throws(function() {
mongosConnActive.getCollection(collSharded.toString()).findOne({_id: 1});
});
assert.neq(null, mongosConnActive.getCollection(collUnsharded.toString()).findOne({_id: 1}));
// Ensure read prefs override slaveOK
mongosConnActive.setSlaveOk();
mongosConnActive.setReadPref("primary");
assert.neq(null, mongosConnActive.getCollection(collSharded.toString()).findOne({_id: -1}));
assert.throws(function() {
mongosConnActive.getCollection(collSharded.toString()).findOne({_id: 1});
});
assert.neq(null, mongosConnActive.getCollection(collUnsharded.toString()).findOne({_id: 1}));
mongosConnActive.setSlaveOk(false);
mongosConnActive.setReadPref("secondary");
assert.neq(null, mongosConnActive.getCollection(collSharded.toString()).findOne({_id: -1}));
assert.neq(null, mongosConnActive.getCollection(collSharded.toString()).findOne({_id: 1}));
assert.neq(null, mongosConnActive.getCollection(collUnsharded.toString()).findOne({_id: 1}));
mongosConnActive.setReadPref("primaryPreferred");
assert.neq(null, mongosConnActive.getCollection(collSharded.toString()).findOne({_id: -1}));
assert.neq(null, mongosConnActive.getCollection(collSharded.toString()).findOne({_id: 1}));
assert.neq(null, mongosConnActive.getCollection(collUnsharded.toString()).findOne({_id: 1}));
mongosConnActive.setReadPref("secondaryPreferred");
assert.neq(null, mongosConnActive.getCollection(collSharded.toString()).findOne({_id: -1}));
assert.neq(null, mongosConnActive.getCollection(collSharded.toString()).findOne({_id: 1}));
assert.neq(null, mongosConnActive.getCollection(collUnsharded.toString()).findOne({_id: 1}));
mongosConnActive.setReadPref("nearest");
assert.neq(null, mongosConnActive.getCollection(collSharded.toString()).findOne({_id: -1}));
assert.neq(null, mongosConnActive.getCollection(collSharded.toString()).findOne({_id: 1}));
assert.neq(null, mongosConnActive.getCollection(collUnsharded.toString()).findOne({_id: 1}));
// Writes
assert.commandWorked(mongosConnActive.getCollection(collSharded.toString()).insert({_id: -5}, wc));
assert.writeError(mongosConnActive.getCollection(collSharded.toString()).insert({_id: 5}, wc));
assert.commandWorked(mongosConnActive.getCollection(collUnsharded.toString()).insert({_id: 5}, wc));
jsTest.log("Testing idle connection with second primary down...");
// Writes
assert.commandWorked(mongosConnIdle.getCollection(collSharded.toString()).insert({_id: -6}, wc));
assert.writeError(mongosConnIdle.getCollection(collSharded.toString()).insert({_id: 6}, wc));
assert.commandWorked(mongosConnIdle.getCollection(collUnsharded.toString()).insert({_id: 6}, wc));
// Reads with read prefs
mongosConnIdle.setSlaveOk();
assert.neq(null, mongosConnIdle.getCollection(collSharded.toString()).findOne({_id: -1}));
assert.neq(null, mongosConnIdle.getCollection(collSharded.toString()).findOne({_id: 1}));
assert.neq(null, mongosConnIdle.getCollection(collUnsharded.toString()).findOne({_id: 1}));
mongosConnIdle.setSlaveOk(false);
mongosConnIdle.setReadPref("primary");
assert.neq(null, mongosConnIdle.getCollection(collSharded.toString()).findOne({_id: -1}));
assert.throws(function() {
mongosConnIdle.getCollection(collSharded.toString()).findOne({_id: 1});
});
assert.neq(null, mongosConnIdle.getCollection(collUnsharded.toString()).findOne({_id: 1}));
// Ensure read prefs override slaveOK
mongosConnIdle.setSlaveOk();
mongosConnIdle.setReadPref("primary");
assert.neq(null, mongosConnIdle.getCollection(collSharded.toString()).findOne({_id: -1}));
assert.throws(function() {
mongosConnIdle.getCollection(collSharded.toString()).findOne({_id: 1});
});
assert.neq(null, mongosConnIdle.getCollection(collUnsharded.toString()).findOne({_id: 1}));
mongosConnIdle.setSlaveOk(false);
mongosConnIdle.setReadPref("secondary");
assert.neq(null, mongosConnIdle.getCollection(collSharded.toString()).findOne({_id: -1}));
assert.neq(null, mongosConnIdle.getCollection(collSharded.toString()).findOne({_id: 1}));
assert.neq(null, mongosConnIdle.getCollection(collUnsharded.toString()).findOne({_id: 1}));
mongosConnIdle.setReadPref("primaryPreferred");
assert.neq(null, mongosConnIdle.getCollection(collSharded.toString()).findOne({_id: -1}));
assert.neq(null, mongosConnIdle.getCollection(collSharded.toString()).findOne({_id: 1}));
assert.neq(null, mongosConnIdle.getCollection(collUnsharded.toString()).findOne({_id: 1}));
mongosConnIdle.setReadPref("secondaryPreferred");
assert.neq(null, mongosConnIdle.getCollection(collSharded.toString()).findOne({_id: -1}));
assert.neq(null, mongosConnIdle.getCollection(collSharded.toString()).findOne({_id: 1}));
assert.neq(null, mongosConnIdle.getCollection(collUnsharded.toString()).findOne({_id: 1}));
mongosConnIdle.setReadPref("nearest");
assert.neq(null, mongosConnIdle.getCollection(collSharded.toString()).findOne({_id: -1}));
assert.neq(null, mongosConnIdle.getCollection(collSharded.toString()).findOne({_id: 1}));
assert.neq(null, mongosConnIdle.getCollection(collUnsharded.toString()).findOne({_id: 1}));
jsTest.log("Testing new connections with second primary down...");
// Reads with read prefs
mongosConnNew = new Mongo(mongos.host);
mongosConnNew.setSlaveOk();
assert.neq(null, mongosConnNew.getCollection(collSharded.toString()).findOne({_id: -1}));
mongosConnNew = new Mongo(mongos.host);
mongosConnNew.setSlaveOk();
assert.neq(null, mongosConnNew.getCollection(collSharded.toString()).findOne({_id: 1}));
mongosConnNew = new Mongo(mongos.host);
mongosConnNew.setSlaveOk();
assert.neq(null, mongosConnNew.getCollection(collUnsharded.toString()).findOne({_id: 1}));
gc(); // Clean up new connections incrementally to compensate for slow win32 machine.
mongosConnNew = new Mongo(mongos.host);
mongosConnNew.setReadPref("primary");
assert.neq(null, mongosConnNew.getCollection(collSharded.toString()).findOne({_id: -1}));
mongosConnNew = new Mongo(mongos.host);
mongosConnNew.setReadPref("primary");
assert.throws(function() {
mongosConnNew.getCollection(collSharded.toString()).findOne({_id: 1});
});
mongosConnNew = new Mongo(mongos.host);
mongosConnNew.setReadPref("primary");
assert.neq(null, mongosConnNew.getCollection(collUnsharded.toString()).findOne({_id: 1}));
gc(); // Clean up new connections incrementally to compensate for slow win32 machine.
// Ensure read prefs override slaveok
mongosConnNew = new Mongo(mongos.host);
mongosConnNew.setSlaveOk();
mongosConnNew.setReadPref("primary");
assert.neq(null, mongosConnNew.getCollection(collSharded.toString()).findOne({_id: -1}));
mongosConnNew = new Mongo(mongos.host);
mongosConnNew.setSlaveOk();
mongosConnNew.setReadPref("primary");
assert.throws(function() {
mongosConnNew.getCollection(collSharded.toString()).findOne({_id: 1});
});
mongosConnNew = new Mongo(mongos.host);
mongosConnNew.setSlaveOk();
mongosConnNew.setReadPref("primary");
assert.neq(null, mongosConnNew.getCollection(collUnsharded.toString()).findOne({_id: 1}));
gc(); // Clean up new connections incrementally to compensate for slow win32 machine.
mongosConnNew = new Mongo(mongos.host);
mongosConnNew.setReadPref("secondary");
assert.neq(null, mongosConnNew.getCollection(collSharded.toString()).findOne({_id: -1}));
mongosConnNew = new Mongo(mongos.host);
mongosConnNew.setReadPref("secondary");
assert.neq(null, mongosConnNew.getCollection(collSharded.toString()).findOne({_id: 1}));
mongosConnNew = new Mongo(mongos.host);
mongosConnNew.setReadPref("secondary");
assert.neq(null, mongosConnNew.getCollection(collUnsharded.toString()).findOne({_id: 1}));
gc(); // Clean up new connections incrementally to compensate for slow win32 machine.
mongosConnNew = new Mongo(mongos.host);
mongosConnNew.setReadPref("primaryPreferred");
assert.neq(null, mongosConnNew.getCollection(collSharded.toString()).findOne({_id: -1}));
mongosConnNew = new Mongo(mongos.host);
mongosConnNew.setReadPref("primaryPreferred");
assert.neq(null, mongosConnNew.getCollection(collSharded.toString()).findOne({_id: 1}));
mongosConnNew = new Mongo(mongos.host);
mongosConnNew.setReadPref("primaryPreferred");
assert.neq(null, mongosConnNew.getCollection(collUnsharded.toString()).findOne({_id: 1}));
gc(); // Clean up new connections incrementally to compensate for slow win32 machine.
mongosConnNew = new Mongo(mongos.host);
mongosConnNew.setReadPref("secondaryPreferred");
assert.neq(null, mongosConnNew.getCollection(collSharded.toString()).findOne({_id: -1}));
mongosConnNew = new Mongo(mongos.host);
mongosConnNew.setReadPref("secondaryPreferred");
assert.neq(null, mongosConnNew.getCollection(collSharded.toString()).findOne({_id: 1}));
mongosConnNew = new Mongo(mongos.host);
mongosConnNew.setReadPref("secondaryPreferred");
assert.neq(null, mongosConnNew.getCollection(collUnsharded.toString()).findOne({_id: 1}));
gc(); // Clean up new connections incrementally to compensate for slow win32 machine.
mongosConnNew = new Mongo(mongos.host);
mongosConnNew.setReadPref("nearest");
assert.neq(null, mongosConnNew.getCollection(collSharded.toString()).findOne({_id: -1}));
mongosConnNew = new Mongo(mongos.host);
mongosConnNew.setReadPref("nearest");
assert.neq(null, mongosConnNew.getCollection(collSharded.toString()).findOne({_id: 1}));
mongosConnNew = new Mongo(mongos.host);
mongosConnNew.setReadPref("nearest");
assert.neq(null, mongosConnNew.getCollection(collUnsharded.toString()).findOne({_id: 1}));
gc(); // Clean up new connections incrementally to compensate for slow win32 machine.
// Writes
mongosConnNew = new Mongo(mongos.host);
assert.commandWorked(mongosConnNew.getCollection(collSharded.toString()).insert({_id: -7}, wc));
mongosConnNew = new Mongo(mongos.host);
assert.writeError(mongosConnNew.getCollection(collSharded.toString()).insert({_id: 7}, wc));
mongosConnNew = new Mongo(mongos.host);
assert.commandWorked(mongosConnNew.getCollection(collUnsharded.toString()).insert({_id: 7}, wc));
gc(); // Clean up new connections
jsTest.log("Stopping primary of first shard...");
mongosConnIdle = new Mongo(mongos.host);
st.rs0.stop(st.rs0.getPrimary());
jsTest.log("Testing active connection with first primary down...");
mongosConnActive.setSlaveOk();
assert.neq(null, mongosConnActive.getCollection(collSharded.toString()).findOne({_id: -1}));
assert.neq(null, mongosConnActive.getCollection(collSharded.toString()).findOne({_id: 1}));
assert.neq(null, mongosConnActive.getCollection(collUnsharded.toString()).findOne({_id: 1}));
assert.writeError(mongosConnActive.getCollection(collSharded.toString()).insert({_id: -8}));
assert.writeError(mongosConnActive.getCollection(collSharded.toString()).insert({_id: 8}));
assert.writeError(mongosConnActive.getCollection(collUnsharded.toString()).insert({_id: 8}));
jsTest.log("Testing idle connection with first primary down...");
assert.writeError(mongosConnIdle.getCollection(collSharded.toString()).insert({_id: -9}));
assert.writeError(mongosConnIdle.getCollection(collSharded.toString()).insert({_id: 9}));
assert.writeError(mongosConnIdle.getCollection(collUnsharded.toString()).insert({_id: 9}));
mongosConnIdle.setSlaveOk();
assert.neq(null, mongosConnIdle.getCollection(collSharded.toString()).findOne({_id: -1}));
assert.neq(null, mongosConnIdle.getCollection(collSharded.toString()).findOne({_id: 1}));
assert.neq(null, mongosConnIdle.getCollection(collUnsharded.toString()).findOne({_id: 1}));
jsTest.log("Testing new connections with first primary down...");
mongosConnNew = new Mongo(mongos.host);
mongosConnNew.setSlaveOk();
assert.neq(null, mongosConnNew.getCollection(collSharded.toString()).findOne({_id: -1}));
mongosConnNew = new Mongo(mongos.host);
mongosConnNew.setSlaveOk();
assert.neq(null, mongosConnNew.getCollection(collSharded.toString()).findOne({_id: 1}));
mongosConnNew = new Mongo(mongos.host);
mongosConnNew.setSlaveOk();
assert.neq(null, mongosConnNew.getCollection(collUnsharded.toString()).findOne({_id: 1}));
mongosConnNew = new Mongo(mongos.host);
assert.writeError(mongosConnNew.getCollection(collSharded.toString()).insert({_id: -10}));
mongosConnNew = new Mongo(mongos.host);
assert.writeError(mongosConnNew.getCollection(collSharded.toString()).insert({_id: 10}));
mongosConnNew = new Mongo(mongos.host);
assert.writeError(mongosConnNew.getCollection(collUnsharded.toString()).insert({_id: 10}));
gc(); // Clean up new connections
jsTest.log("Stopping second shard...");
mongosConnIdle = new Mongo(mongos.host);
st.rs1.stop(rs1Secondary);
jsTest.log("Testing active connection with second shard down...");
mongosConnActive.setSlaveOk();
assert.neq(null, mongosConnActive.getCollection(collSharded.toString()).findOne({_id: -1}));
assert.neq(null, mongosConnActive.getCollection(collUnsharded.toString()).findOne({_id: 1}));
assert.writeError(mongosConnActive.getCollection(collSharded.toString()).insert({_id: -11}));
assert.writeError(mongosConnActive.getCollection(collSharded.toString()).insert({_id: 11}));
assert.writeError(mongosConnActive.getCollection(collUnsharded.toString()).insert({_id: 11}));
jsTest.log("Testing idle connection with second shard down...");
assert.writeError(mongosConnIdle.getCollection(collSharded.toString()).insert({_id: -12}));
assert.writeError(mongosConnIdle.getCollection(collSharded.toString()).insert({_id: 12}));
assert.writeError(mongosConnIdle.getCollection(collUnsharded.toString()).insert({_id: 12}));
mongosConnIdle.setSlaveOk();
assert.neq(null, mongosConnIdle.getCollection(collSharded.toString()).findOne({_id: -1}));
assert.neq(null, mongosConnIdle.getCollection(collUnsharded.toString()).findOne({_id: 1}));
jsTest.log("Testing new connections with second shard down...");
mongosConnNew = new Mongo(mongos.host);
mongosConnNew.setSlaveOk();
assert.neq(null, mongosConnNew.getCollection(collSharded.toString()).findOne({_id: -1}));
mongosConnNew = new Mongo(mongos.host);
mongosConnNew.setSlaveOk();
assert.neq(null, mongosConnNew.getCollection(collUnsharded.toString()).findOne({_id: 1}));
mongosConnNew = new Mongo(mongos.host);
assert.writeError(mongosConnNew.getCollection(collSharded.toString()).insert({_id: -13}));
mongosConnNew = new Mongo(mongos.host);
assert.writeError(mongosConnNew.getCollection(collSharded.toString()).insert({_id: 13}));
mongosConnNew = new Mongo(mongos.host);
assert.writeError(mongosConnNew.getCollection(collUnsharded.toString()).insert({_id: 13}));
gc(); // Clean up new connections
st.stop();
})();
|
