Node forking will include any --import from the original command #912
Description
Versions
- NodeJS: 23.3.0
- mongodb-memory-server-*: 9.x, 10.x, 10.1.3
- mongodb(the binary version): not relevant, quickest to notice is 7.0.14
- mongodb(the js package): not relevant
- system: linux, but likely others
package: mongo-memory-server-core
What is the Problem?
It seems like when we do child_process.fork now, it implies --import PRELOAD if the original process has been started with --import, like in the following example.
This causes the PRELOAD to be re-executed upon forking to the killer_script, causing a infinite loop of starting and never cleaning-up extra mongo servers.
see #907 (comment)
Code Example
// setup.js
const t = require("node:test");
const { MongoMemoryServer } = require("mongodb-memory-server-core");
let dbServer;
module.exports.connect = async () => {
dbServer = await MongoMemoryServer.create();
};
module.exports.closeDatabase = async () => {
await new Promise((res) => {
setTimeout(res, 1000 * 10);
})
await dbServer.stop({ doCleanup: true });
};
t.before(async () => {
await module.exports.connect();
});
t.after(async () => {
await module.exports.closeDatabase();
});
// a.test.js
const t = require("node:test");
t.describe("name", () => {
t.it("test", () => {
1+1
});
});Execute with:
node --test --import ./setup.jsDebug Output
no output by default as we disable stdio for the forked process
Do you know why it happenes?
Yes, as described above.