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/**
* A killOp command issued against a collection drop should not interfere with the drop and allow it
* to complete. Interrupting a collection drop could leave the database in an inconsistent state.
* This test confirms that killOp won't interrupt a collection drop, and that the drop occurs
* successfully.
*
* @tags: [
* assumes_superuser_permissions,
* # Uses index building in background
* requires_background_index,
* ]
*/
(function() {
"use strict";
var collectionName = "killop_drop";
let collection = db.getCollection(collectionName);
collection.drop();
for (let i = 0; i < 1000; i++) {
assert.writeOK(collection.insert({x: i}));
}
assert.writeOK(collection.createIndex({x: 1}, {background: true}));
// Attempt to fsyncLock the database, aborting early if the storage engine doesn't support it.
const storageEngine = jsTest.options().storageEngine;
let fsyncRes = db.fsyncLock();
if (!fsyncRes.ok) {
assert.commandFailedWithCode(fsyncRes, ErrorCodes.CommandNotSupported);
jsTest.log("Skipping test on storage engine " + storageEngine +
", which does not support fsyncLock.");
return;
}
// Kick off a drop on the collection.
const useDefaultPort = null;
const noConnect = false;
// The drop will occasionally, and legitimately be interrupted by killOp (and not succeed).
let awaitDropCommand = startParallelShell(function() {
let res = db.getSiblingDB("test").runCommand({drop: "killop_drop"});
let collectionFound = db.getCollectionNames().includes("killop_drop");
if (res.ok == 1) {
// Ensure that the collection has been dropped.
assert(
!collectionFound,
"Expected collection to not appear in listCollections output after being dropped");
} else {
// Ensure that the collection hasn't been dropped.
assert(collectionFound,
"Expected collection to appear in listCollections output after drop failed");
}
}, useDefaultPort, noConnect);
// Wait for the drop operation to appear in the db.currentOp() output.
let dropCommandOpId = null;
assert.soon(function() {
let dropOpsInProgress = db.currentOp().inprog.filter(
op => op.command && op.command.drop === collection.getName());
if (dropOpsInProgress.length > 0) {
dropCommandOpId = dropOpsInProgress[0].opid;
}
return dropCommandOpId;
});
// Issue a killOp for the drop command, then unlock the server. We expect that the drop
// operation was *not* killed, and that the collection was dropped successfully.
assert.commandWorked(db.killOp(dropCommandOpId));
let unlockRes = assert.commandWorked(db.fsyncUnlock());
assert.eq(0,
unlockRes.lockCount,
"Expected the number of fsyncLocks to be zero after issuing fsyncUnlock");
awaitDropCommand();
}());
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