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// This test verifies that particular code paths exit early (I.e. are killed) or not by:
//
// 1. Set a fail point that will hang the code path
// 2. Open a new client with sockettimeoutms set (to force the disconnect) and a special appname
// (to allow easy checking for the specific connection)
// 3. Run the tested command on the special connection and wait for it to timeout
// 4. Use an existing client to check current op for that special appname. Return true if it's
// still there at the end of a timeout
// 5. Disable the fail point
//
// @tags: [requires_sharding]
(function() {
"use strict";
const testName = "socket_disconnect_kills";
// Used to generate unique appnames
let id = 0;
// client - A client connection for curop (and that holds the hostname)
// pre - A callback to run with the timing out socket
// post - A callback to run after everything else has resolved (cleanup)
//
// Returns false if the op was gone from current op
function check(client, pre, post) {
const interval = 200;
const timeout = 10000;
const socketTimeout = 5000;
const host = client.host;
// Make a socket which will timeout
id++;
let conn =
new Mongo(`mongodb://${host}/?socketTimeoutMS=${socketTimeout}&appName=${testName}${id}`);
// Make sure it works at all
assert.commandWorked(conn.adminCommand({ping: 1}));
try {
// Make sure that whatever operation we ran had a network error
assert.throws(function() {
try {
pre(conn);
} catch (e) {
if (isNetworkError(e)) {
throw e;
}
}
}, [], "error doing query: failed: network error while attempting");
// Spin until the op leaves currentop, or timeout passes
const start = new Date();
while (1) {
if (!client.getDB("admin")
.aggregate([
{$currentOp: {localOps: true}},
{$match: {appName: testName + id}},
])
.itcount()) {
return false;
}
if (((new Date()).getTime() - start.getTime()) > timeout) {
return true;
}
sleep(interval);
}
} finally {
post();
}
}
function runWithCuropFailPointEnabled(client, failPointName) {
return function(entry) {
entry[0](client,
function(client) {
assert.commandWorked(client.adminCommand({
configureFailPoint: failPointName,
mode: "alwaysOn",
data: {shouldCheckForInterrupt: true},
}));
entry[1](client);
},
function() {
assert.commandWorked(
client.adminCommand({configureFailPoint: failPointName, mode: "off"}));
});
};
}
function runWithCmdFailPointEnabled(client) {
return function(entry) {
const failPointName = "waitInCommandMarkKillOnClientDisconnect";
entry[0](client,
function(client) {
assert.commandWorked(client.adminCommand({
configureFailPoint: failPointName,
mode: "alwaysOn",
data: {appName: testName + id},
}));
entry[1](client);
},
function() {
assert.commandWorked(
client.adminCommand({configureFailPoint: failPointName, mode: "off"}));
});
};
}
function checkClosedEarly(client, pre, post) {
assert(!check(client, pre, post), "operation killed on socket disconnect");
}
function checkNotClosedEarly(client, pre, post) {
assert(check(client, pre, post), "operation not killed on socket disconnect");
}
function runCommand(cmd) {
return function(client) {
assert.commandWorked(client.getDB(testName).runCommand(cmd));
};
}
function runTests(client) {
let admin = client.getDB("admin");
// set timeout for js function execution to 100 ms to speed up tests that run inf loop.
assert.commandWorked(client.getDB(testName).adminCommand(
{setParameter: 1, internalQueryJavaScriptFnTimeoutMillis: 100}));
assert.commandWorked(client.getDB(testName).test.insert({x: 1}));
assert.commandWorked(client.getDB(testName).test.insert({x: 2}));
assert.commandWorked(client.getDB(testName).test.insert({x: 3}));
[[checkClosedEarly, runCommand({find: "test", filter: {}})],
[
checkClosedEarly,
runCommand({
find: "test",
filter: {
$where: function() {
sleep(100000);
}
}
})
],
[
checkClosedEarly,
runCommand({
find: "test",
filter: {
$where: function() {
while (true) {
}
}
}
})
],
].forEach(runWithCuropFailPointEnabled(client, "waitInFindBeforeMakingBatch"));
// After SERVER-39475, re-enable these tests and add negative testing for $out cursors.
const serverSupportsEarlyDisconnectOnGetMore = false;
if (serverSupportsEarlyDisconnectOnGetMore) {
[[
checkClosedEarly,
function(client) {
let result = assert.commandWorked(
client.getDB(testName).runCommand({find: "test", filter: {}, batchSize: 0}));
assert.commandWorked(client.getDB(testName).runCommand(
{getMore: result.cursor.id, collection: "test"}));
}
]].forEach(runWithCuropFailPointEnabled(client,
"waitAfterPinningCursorBeforeGetMoreBatch"));
}
[[checkClosedEarly, runCommand({aggregate: "test", pipeline: [], cursor: {}})],
[checkNotClosedEarly, runCommand({aggregate: "test", pipeline: [{$out: "out"}], cursor: {}})],
].forEach(runWithCmdFailPointEnabled(client));
[[checkClosedEarly, runCommand({count: "test"})],
[checkClosedEarly, runCommand({distinct: "test", key: "x"})],
[checkClosedEarly, runCommand({hello: 1})],
[checkClosedEarly, runCommand({listCollections: 1})],
[checkClosedEarly, runCommand({listIndexes: "test"})],
].forEach(runWithCmdFailPointEnabled(client));
}
{
let proc = MongoRunner.runMongod();
assert.neq(proc, null);
runTests(proc);
MongoRunner.stopMongod(proc);
}
{
let st = ShardingTest({mongo: 1, config: 1, shards: 1});
runTests(st.s0);
st.stop();
}
})();
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