path: root/jstests/core/max_time_ms.js

// Tests query/command option $maxTimeMS.

var t = db.max_time_ms;
var exceededTimeLimit = 50;  // ErrorCodes::ExceededTimeLimit
var cursor;
var res;

//
// Simple positive test for query: a ~300ms query with a 100ms time limit should be aborted.
//

t.drop();
t.insert([{}, {}, {}]);
cursor = t.find({
    $where: function() {
        sleep(100);
        return true;
    }
});
cursor.maxTimeMS(100);
assert.throws(function() {
    cursor.itcount();
}, [], "expected query to abort due to time limit");

//
// Simple negative test for query: a ~300ms query with a 10s time limit should not hit the time
// limit.
//

t.drop();
t.insert([{}, {}, {}]);
cursor = t.find({
    $where: function() {
        sleep(100);
        return true;
    }
});
cursor.maxTimeMS(10 * 1000);
assert.doesNotThrow(function() {
    cursor.itcount();
}, [], "expected query to not hit the time limit");

//
// Simple positive test for getmore:
// - Issue a find() that returns 2 batches: a fast batch, then a slow batch.
// - The find() has a 1-second time limit; the first batch should run "instantly", but the second
//   batch takes ~15 seconds, so the getmore should be aborted.
//

t.drop();
t.insert([{}, {}, {}]);  // fast batch
t.insert([{slow: true}, {slow: true}, {slow: true}]);  // slow batch
cursor = t.find({
    $where: function() {
        if (this.slow) {
            sleep(5 * 1000);
        }
        return true;
    }
});
cursor.batchSize(3);
cursor.maxTimeMS(1000);
assert.doesNotThrow(function() {
    cursor.next();
    cursor.next();
    cursor.next();
}, [], "expected batch 1 (query) to not hit the time limit");
assert.throws(function() {
    cursor.next();
    cursor.next();
    cursor.next();
}, [], "expected batch 2 (getmore) to abort due to time limit");

//
// Simple negative test for getmore:
// - Issue a find() that returns 2 batches: a fast batch, then a slow batch.
// - The find() has a 10-second time limit; the first batch should run "instantly", and the second
//   batch takes only ~2 seconds, so both the query and getmore should not hit the time limit.
//

t.drop();
t.insert([{}, {}, {}]);  // fast batch
t.insert([{}, {}, {slow: true}]);  // slow batch
cursor = t.find({
    $where: function() {
        if (this.slow) {
            sleep(2 * 1000);
        }
        return true;
    }
});
cursor.batchSize(3);
cursor.maxTimeMS(10 * 1000);
assert.doesNotThrow(function() {
    cursor.next();
    cursor.next();
    cursor.next();
}, [], "expected batch 1 (query) to not hit the time limit");
assert.doesNotThrow(function() {
    cursor.next();
    cursor.next();
    cursor.next();
}, [], "expected batch 2 (getmore) to not hit the time limit");

//
// Many-batch positive test for getmore:
// - Issue a many-batch find() with a 6-second time limit where the results take 10 seconds to
//   generate; one of the later getmore ops should be aborted.
//

t.drop();
for (var i = 0; i < 5; i++) {
    t.insert([{}, {}, {slow: true}]);
}
cursor = t.find({
    $where: function() {
        if (this.slow) {
            sleep(2 * 1000);
        }
        return true;
    }
});
cursor.batchSize(3);
cursor.maxTimeMS(6 * 1000);
assert.throws(function() {
    cursor.itcount();
}, [], "expected find() to abort due to time limit");

//
// Many-batch negative test for getmore:
// - Issue a many-batch find() with a 20-second time limit where the results take 10 seconds to
//   generate; the find() should not hit the time limit.
//

t.drop();
for (var i = 0; i < 5; i++) {
    t.insert([{}, {}, {slow: true}]);
}
cursor = t.find({
    $where: function() {
        if (this.slow) {
            sleep(2 * 1000);
        }
        return true;
    }
});
cursor.batchSize(3);
cursor.maxTimeMS(20 * 1000);
assert.doesNotThrow(function() {
    cursor.itcount();
}, [], "expected find() to not hit the time limit");

//
// Simple positive test for commands: a ~300ms command with a 100ms time limit should be aborted.
//

t.drop();
res = t.getDB().adminCommand({sleep: 1, millis: 300, maxTimeMS: 100});
assert(res.ok == 0 && res.code == exceededTimeLimit,
       "expected sleep command to abort due to time limit, ok=" + res.ok + ", code=" + res.code);

//
// Simple negative test for commands: a ~300ms command with a 10s time limit should not hit the
// time limit.
//

t.drop();
res = t.getDB().adminCommand({sleep: 1, millis: 300, maxTimeMS: 10 * 1000});
assert(res.ok == 1,
       "expected sleep command to not hit the time limit, ok=" + res.ok + ", code=" + res.code);

//
// Tests for input validation.
//

t.drop();
t.insert({});

// Verify lower boundary for acceptable input (0 is acceptable, 1 isn't).

assert.doesNotThrow.automsg(function() {
    t.find().maxTimeMS(0).itcount();
});
assert.doesNotThrow.automsg(function() {
    t.find().maxTimeMS(NumberInt(0)).itcount();
});
assert.doesNotThrow.automsg(function() {
    t.find().maxTimeMS(NumberLong(0)).itcount();
});
assert.eq(1, t.getDB().runCommand({ping: 1, maxTimeMS: 0}).ok);
assert.eq(1, t.getDB().runCommand({ping: 1, maxTimeMS: NumberInt(0)}).ok);
assert.eq(1, t.getDB().runCommand({ping: 1, maxTimeMS: NumberLong(0)}).ok);

assert.throws.automsg(function() {
    t.find().maxTimeMS(-1).itcount();
});
assert.throws.automsg(function() {
    t.find().maxTimeMS(NumberInt(-1)).itcount();
});
assert.throws.automsg(function() {
    t.find().maxTimeMS(NumberLong(-1)).itcount();
});
assert.eq(0, t.getDB().runCommand({ping: 1, maxTimeMS: -1}).ok);
assert.eq(0, t.getDB().runCommand({ping: 1, maxTimeMS: NumberInt(-1)}).ok);
assert.eq(0, t.getDB().runCommand({ping: 1, maxTimeMS: NumberLong(-1)}).ok);

// Verify upper boundary for acceptable input (2^31-1 is acceptable, 2^31 isn't).

var maxValue = Math.pow(2, 31) - 1;

assert.doesNotThrow.automsg(function() {
    t.find().maxTimeMS(maxValue).itcount();
});
assert.doesNotThrow.automsg(function() {
    t.find().maxTimeMS(NumberInt(maxValue)).itcount();
});
assert.doesNotThrow.automsg(function() {
    t.find().maxTimeMS(NumberLong(maxValue)).itcount();
});
assert.eq(1, t.getDB().runCommand({ping: 1, maxTimeMS: maxValue}).ok);
assert.eq(1, t.getDB().runCommand({ping: 1, maxTimeMS: NumberInt(maxValue)}).ok);
assert.eq(1, t.getDB().runCommand({ping: 1, maxTimeMS: NumberLong(maxValue)}).ok);

assert.throws.automsg(function() {
    t.find().maxTimeMS(maxValue + 1).itcount();
});
assert.throws.automsg(function() {
    t.find().maxTimeMS(NumberInt(maxValue + 1)).itcount();
});
assert.throws.automsg(function() {
    t.find().maxTimeMS(NumberLong(maxValue + 1)).itcount();
});
assert.eq(0, t.getDB().runCommand({ping: 1, maxTimeMS: maxValue + 1}).ok);
assert.eq(0, t.getDB().runCommand({ping: 1, maxTimeMS: NumberInt(maxValue + 1)}).ok);
assert.eq(0, t.getDB().runCommand({ping: 1, maxTimeMS: NumberLong(maxValue + 1)}).ok);

// Verify invalid values are rejected.
assert.throws.automsg(function() {
    t.find().maxTimeMS(0.1).itcount();
});
assert.throws.automsg(function() {
    t.find().maxTimeMS(-0.1).itcount();
});
assert.throws.automsg(function() {
    t.find().maxTimeMS().itcount();
});
assert.throws.automsg(function() {
    t.find().maxTimeMS("").itcount();
});
assert.throws.automsg(function() {
    t.find().maxTimeMS(true).itcount();
});
assert.throws.automsg(function() {
    t.find().maxTimeMS({}).itcount();
});
assert.eq(0, t.getDB().runCommand({ping: 1, maxTimeMS: 0.1}).ok);
assert.eq(0, t.getDB().runCommand({ping: 1, maxTimeMS: -0.1}).ok);
assert.eq(0, t.getDB().runCommand({ping: 1, maxTimeMS: undefined}).ok);
assert.eq(0, t.getDB().runCommand({ping: 1, maxTimeMS: ""}).ok);
assert.eq(0, t.getDB().runCommand({ping: 1, maxTimeMS: true}).ok);
assert.eq(0, t.getDB().runCommand({ping: 1, maxTimeMS: {}}).ok);

// Verify that the maxTimeMS command argument can be sent with $query-wrapped commands.
cursor = t.getDB().$cmd.find({ping: 1, maxTimeMS: 0}).limit(-1);
cursor._ensureSpecial();
assert.eq(1, cursor.next().ok);

// Verify that the server rejects invalid command argument $maxTimeMS.
cursor = t.getDB().$cmd.find({ping: 1, $maxTimeMS: 0}).limit(-1);
cursor._ensureSpecial();
assert.eq(0, cursor.next().ok);

// Verify that the $maxTimeMS query option can't be sent with $query-wrapped commands.
// the shell will throw here as it will validate itself when sending the command.
// The server uses the same logic.
// TODO: rewrite to use runCommandWithMetadata when we have a shell helper so that
// we can test server side validation.
assert.throws(function() {
    cursor = t.getDB().$cmd.find({ping: 1}).limit(-1).maxTimeMS(0);
    cursor._ensureSpecial();
    cursor.next();
});

//
// Tests for fail points maxTimeAlwaysTimeOut and maxTimeNeverTimeOut.
//

// maxTimeAlwaysTimeOut positive test for command.
t.drop();
assert.eq(
    1, t.getDB().adminCommand({configureFailPoint: "maxTimeAlwaysTimeOut", mode: "alwaysOn"}).ok);
res = t.getDB().runCommand({ping: 1, maxTimeMS: 10 * 1000});
assert(res.ok == 0 && res.code == exceededTimeLimit,
       "expected command to trigger maxTimeAlwaysTimeOut fail point, ok=" + res.ok + ", code=" +
           res.code);
assert.eq(1, t.getDB().adminCommand({configureFailPoint: "maxTimeAlwaysTimeOut", mode: "off"}).ok);

// maxTimeNeverTimeOut positive test for command.
t.drop();
assert.eq(1,
          t.getDB().adminCommand({configureFailPoint: "maxTimeNeverTimeOut", mode: "alwaysOn"}).ok);
res = t.getDB().adminCommand({sleep: 1, millis: 300, maxTimeMS: 100});
assert(res.ok == 1,
       "expected command to trigger maxTimeNeverTimeOut fail point, ok=" + res.ok + ", code=" +
           res.code);
assert.eq(1, t.getDB().adminCommand({configureFailPoint: "maxTimeNeverTimeOut", mode: "off"}).ok);

// maxTimeAlwaysTimeOut positive test for query.
t.drop();
assert.eq(
    1, t.getDB().adminCommand({configureFailPoint: "maxTimeAlwaysTimeOut", mode: "alwaysOn"}).ok);
assert.throws(function() {
    t.find().maxTimeMS(10 * 1000).itcount();
}, [], "expected query to trigger maxTimeAlwaysTimeOut fail point");
assert.eq(1, t.getDB().adminCommand({configureFailPoint: "maxTimeAlwaysTimeOut", mode: "off"}).ok);

// maxTimeNeverTimeOut positive test for query.
assert.eq(1,
          t.getDB().adminCommand({configureFailPoint: "maxTimeNeverTimeOut", mode: "alwaysOn"}).ok);
t.drop();
t.insert([{}, {}, {}]);
cursor = t.find({
    $where: function() {
        sleep(100);
        return true;
    }
});
cursor.maxTimeMS(100);
assert.doesNotThrow(function() {
    cursor.itcount();
}, [], "expected query to trigger maxTimeNeverTimeOut fail point");
assert.eq(1, t.getDB().adminCommand({configureFailPoint: "maxTimeNeverTimeOut", mode: "off"}).ok);

// maxTimeAlwaysTimeOut positive test for getmore.
t.drop();
t.insert([{}, {}, {}]);
cursor = t.find().maxTimeMS(10 * 1000).batchSize(2);
assert.doesNotThrow.automsg(function() {
    cursor.next();
    cursor.next();
});
assert.eq(
    1, t.getDB().adminCommand({configureFailPoint: "maxTimeAlwaysTimeOut", mode: "alwaysOn"}).ok);
assert.throws(function() {
    cursor.next();
}, [], "expected getmore to trigger maxTimeAlwaysTimeOut fail point");
assert.eq(1, t.getDB().adminCommand({configureFailPoint: "maxTimeAlwaysTimeOut", mode: "off"}).ok);

// maxTimeNeverTimeOut positive test for getmore.
t.drop();
t.insert([{}, {}, {}]);  // fast batch
t.insert([{slow: true}, {slow: true}, {slow: true}]);  // slow batch
cursor = t.find({
    $where: function() {
        if (this.slow) {
            sleep(2 * 1000);
        }
        return true;
    }
});
cursor.batchSize(3);
cursor.maxTimeMS(2 * 1000);
assert.doesNotThrow(function() {
    cursor.next();
    cursor.next();
    cursor.next();
}, [], "expected batch 1 (query) to not hit the time limit");
assert.eq(1,
          t.getDB().adminCommand({configureFailPoint: "maxTimeNeverTimeOut", mode: "alwaysOn"}).ok);
assert.doesNotThrow(function() {
    cursor.next();
    cursor.next();
    cursor.next();
}, [], "expected batch 2 (getmore) to trigger maxTimeNeverTimeOut fail point");
assert.eq(1, t.getDB().adminCommand({configureFailPoint: "maxTimeNeverTimeOut", mode: "off"}).ok);

//
// Test that maxTimeMS is accepted by commands that have an option whitelist.
//

// "aggregate" command.
res = t.runCommand("aggregate", {pipeline: [], maxTimeMS: 60 * 1000});
assert(res.ok == 1,
       "expected aggregate with maxtime to succeed, ok=" + res.ok + ", code=" + res.code);

// "collMod" command.
res = t.runCommand("collMod", {usePowerOf2Sizes: true, maxTimeMS: 60 * 1000});
assert(res.ok == 1,
       "expected collmod with maxtime to succeed, ok=" + res.ok + ", code=" + res.code);

//
// Test maxTimeMS for parallelCollectionScan
//
res = t.runCommand({parallelCollectionScan: t.getName(), numCursors: 1, maxTimeMS: 60 * 1000});
assert.commandWorked(res);
var cursor = new DBCommandCursor(t.getDB().getMongo(), res.cursors[0], 5);
assert.commandWorked(
    t.getDB().adminCommand({configureFailPoint: "maxTimeAlwaysTimeOut", mode: "alwaysOn"}));
assert.throws(function() {
    cursor.itcount();
}, [], "expected query to abort due to time limit");
assert.commandWorked(
    t.getDB().adminCommand({configureFailPoint: "maxTimeAlwaysTimeOut", mode: "off"}));

//
// test count shell helper SERVER-13334
//
t.drop();
assert.eq(1,
          t.getDB().adminCommand({configureFailPoint: "maxTimeNeverTimeOut", mode: "alwaysOn"}).ok);
assert.doesNotThrow(function() {
    t.find({}).maxTimeMS(1).count();
});
assert.eq(1, t.getDB().adminCommand({configureFailPoint: "maxTimeNeverTimeOut", mode: "off"}).ok);