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fix: remove process listeners after stopping the server #4013

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merged 3 commits into from Nov 12, 2021
Merged

fix: remove process listeners after stopping the server #4013

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447fe4d
fix: remove process listeners after stopping the server
snitin315 Nov 8, 2021
fcae3f5
fix: listener leak
alexander-akait Nov 12, 2021
3896404
test: fix
alexander-akait Nov 12, 2021
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5 changes: 5 additions & 0 deletions lib/Server.js
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Expand Up @@ -2258,6 +2258,11 @@ class Server {
this.middleware = null;
}
}

// We add listeners to signals when creating a new Server instance
// So ensure they are removed to prevent EventEmitter memory leak warnings
process.removeAllListeners("SIGINT");
process.removeAllListeners("SIGTERM");
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We should not remove all of them just only our, move our close function above the file and use removeListener

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above where?

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Somewhere here https://github.com/webpack/webpack-dev-server/blob/master/lib/Server.js#L17, like

if (needForceShutdown) {
            exitProcess();
          }

          this.logger.info(
            "Gracefully shutting down. To force exit, press ^C again. Please wait..."
          );

          needForceShutdown = true;

          this.stopCallback(() => {
            if (typeof this.compiler.close === "function") {
              this.compiler.close(exitProcess);
            } else {
              exitProcess();
            }
});

from https://github.com/webpack/webpack-dev-server/blob/master/lib/Server.js#L1177

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I.e. just move it in function above the Server class and remove this listener in close

}

stopCallback(callback) {
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