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/**
* Tests that an idle cursor will appear in the $currentOp output if the idleCursors option is
* set to true.
*
* @tags: [
* assumes_read_concern_unchanged,
* assumes_read_preference_unchanged,
* requires_capped,
* ]
*/
(function() {
"use strict";
const coll = db.jstests_currentop_cursors;
load("jstests/libs/fixture_helpers.js"); // for FixtureHelpers
// Avoiding using the shell helper to avoid the implicit collection recreation.
db.runCommand({drop: coll.getName()});
assert.commandWorked(db.createCollection(coll.getName(), {capped: true, size: 1000}));
for (let i = 0; i < 30; ++i) {
assert.commandWorked(coll.insert({"val": i}));
}
/**
* runTest creates a new collection called jstests_currentop_cursors and then runs the provided
* find query. It calls $currentOp and does some basic assertions to make sure idleCursors is
* behaving as intended in each case.
* findFunc: A function that runs a find query. Is expected to return a cursorID.
* Arbitrary code can be run in findFunc as long as it returns a cursorID.
* assertFunc: A function that runs assertions against the results of the $currentOp.
* Takes the following arguments
* 'findOut': The cursorID returned from findFunc.
* 'result': The results from running $currenpOp as an array of JSON objects.
* Arbitrary code can be run in assertFunc, and there is no return value needed.
*/
function runTest({findFunc, assertFunc}) {
const adminDB = db.getSiblingDB("admin");
const findOut = findFunc();
const result = adminDB
.aggregate([
{$currentOp: {localOps: true, allUsers: false, idleCursors: true}},
{$match: {$and: [{type: "idleCursor"}, {"cursor.cursorId": findOut}]}}
])
.toArray();
assert.eq(result[0].ns, coll.getFullName(), result);
assert.eq(result[0].cursor.originatingCommand.find, coll.getName(), result);
assertFunc(findOut, result);
const noIdle = adminDB
.aggregate([
{$currentOp: {allUsers: false, idleCursors: false}},
{$match: {$and: [{type: "idleCursor"}, {"cursor.cursorId": findOut}]}}
])
.toArray();
assert.eq(noIdle.length, 0, tojson(noIdle));
const noFlag =
adminDB.aggregate([{$currentOp: {allUsers: false}}, {$match: {type: "idleCursor"}}])
.toArray();
assert.eq(noIdle.length, 0, tojson(noFlag));
}
// Basic test with default values.
runTest({
findFunc: function() {
return assert
.commandWorked(db.runCommand({find: "jstests_currentop_cursors", batchSize: 2}))
.cursor.id;
},
assertFunc: function(cursorId, result) {
assert.eq(result.length, 1, result);
// Plan summary does not exist on mongos, so skip this test on mongos.
if (!FixtureHelpers.isMongos(db)) {
assert.eq(result[0].planSummary, "COLLSCAN", result);
} else {
assert(!result[0].hasOwnProperty("planSummary"), result);
}
assert(result[0].lsid.hasOwnProperty('id'), result);
assert(result[0].lsid.hasOwnProperty('uid'), result);
const uri = new MongoURI(db.getMongo().host);
assert(uri.servers.some((server) => {
return result[0].host == getHostName() + ":" + server.port;
}));
const idleCursor = result[0].cursor;
assert.eq(idleCursor.nDocsReturned, 2, result);
assert.eq(idleCursor.nBatchesReturned, 1, result);
assert.eq(idleCursor.tailable, false, result);
assert.eq(idleCursor.awaitData, false, result);
assert.eq(idleCursor.noCursorTimeout, false, result);
assert.eq(idleCursor.originatingCommand.batchSize, 2, result);
assert.lte(idleCursor.createdDate, idleCursor.lastAccessDate, result);
// Make sure that the top level fields do not also appear in the cursor subobject.
assert(!idleCursor.hasOwnProperty("planSummary"), result);
assert(!idleCursor.hasOwnProperty('host'), result);
assert(!idleCursor.hasOwnProperty('lsid'), result);
}
});
// Test that tailable, awaitData, and noCursorTimeout are set.
runTest({
findFunc: function() {
return assert
.commandWorked(db.runCommand({
find: "jstests_currentop_cursors",
batchSize: 2,
tailable: true,
awaitData: true,
noCursorTimeout: true
}))
.cursor.id;
},
assertFunc: function(cursorId, result) {
assert.eq(result.length, 1, result);
const idleCursor = result[0].cursor;
assert.eq(idleCursor.tailable, true, result);
assert.eq(idleCursor.awaitData, true, result);
assert.eq(idleCursor.noCursorTimeout, true, result);
assert.eq(idleCursor.originatingCommand.batchSize, 2, result);
}
});
// Test that dates are set correctly.
runTest({
findFunc: function() {
return assert
.commandWorked(db.runCommand({find: "jstests_currentop_cursors", batchSize: 2}))
.cursor.id;
},
assertFunc: function(cursorId, result) {
const adminDB = db.getSiblingDB("admin");
// Make sure the two cursors have different creation times.
assert.soon(() => {
const secondCursor = assert.commandWorked(
db.runCommand({find: "jstests_currentop_cursors", batchSize: 2}));
const secondResult =
adminDB
.aggregate([
{$currentOp: {localOps: true, allUsers: false, idleCursors: true}},
{
$match: {
$and: [
{type: "idleCursor"},
{"cursor.cursorId": secondCursor.cursor.id}
]
}
}
])
.toArray();
return result[0].cursor.createdDate < secondResult[0].cursor.createdDate;
});
}
});
// Test larger batch size.
runTest({
findFunc: function() {
return assert
.commandWorked(db.runCommand(
{find: "jstests_currentop_cursors", batchSize: 4, noCursorTimeout: true}))
.cursor.id;
},
assertFunc: function(cursorId, result) {
const idleCursor = result[0].cursor;
assert.eq(result.length, 1, result);
assert.eq(idleCursor.nDocsReturned, 4, result);
assert.eq(idleCursor.nBatchesReturned, 1, result);
assert.eq(idleCursor.noCursorTimeout, true, result);
assert.eq(idleCursor.originatingCommand.batchSize, 4, result);
}
});
// Test batchSize and nDocs are incremented correctly.
runTest({
findFunc: function() {
return assert
.commandWorked(db.runCommand({find: "jstests_currentop_cursors", batchSize: 2}))
.cursor.id;
},
assertFunc: function(cursorId, result) {
const adminDB = db.getSiblingDB("admin");
const originalAccess = result[0].cursor.lastAccessDate;
assert.commandWorked(db.runCommand(
{getMore: cursorId, collection: "jstests_currentop_cursors", batchSize: 2}));
result = adminDB
.aggregate([
{$currentOp: {localOps: true, allUsers: false, idleCursors: true}},
{$match: {$and: [{type: "idleCursor"}, {"cursor.cursorId": cursorId}]}}
])
.toArray();
let idleCursor = result[0].cursor;
assert.eq(idleCursor.nDocsReturned, 4, result);
assert.eq(idleCursor.nBatchesReturned, 2, result);
assert.eq(idleCursor.originatingCommand.batchSize, 2, result);
// Make sure that the getMore will not finish running in the same milli as the cursor
// creation.
assert.soon(() => {
assert.commandWorked(db.runCommand(
{getMore: cursorId, collection: "jstests_currentop_cursors", batchSize: 2}));
result = adminDB
.aggregate([
{$currentOp: {localOps: true, allUsers: false, idleCursors: true}},
{$match: {$and: [{type: "idleCursor"}, {"cursor.cursorId": cursorId}]}}
])
.toArray();
idleCursor = result[0].cursor;
return idleCursor.createdDate < idleCursor.lastAccessDate &&
originalAccess < idleCursor.lastAccessDate;
});
}
});
// planSummary does not exist on Mongos, so skip this test.
if (!FixtureHelpers.isMongos(db)) {
runTest({
findFunc: function() {
assert.commandWorked(coll.createIndex({"val": 1}));
return assert
.commandWorked(db.runCommand(
{find: "jstests_currentop_cursors", filter: {"val": {$gt: 2}}, batchSize: 2}))
.cursor.id;
},
assertFunc: function(cursorId, result) {
assert.eq(result.length, 1, result);
assert.eq(result[0].planSummary, "IXSCAN { val: 1 }", result);
}
});
}
// Test lsid.id value is correct.
const session = db.getMongo().startSession();
runTest({
findFunc: function() {
const sessionDB = session.getDatabase("test");
return assert
.commandWorked(sessionDB.runCommand({find: "jstests_currentop_cursors", batchSize: 2}))
.cursor.id;
},
assertFunc: function(cursorId, result) {
assert.eq(result.length, 1, result);
assert.eq(session.getSessionId().id, result[0].lsid.id);
}
});
})();
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