What to do when IB Historical Data requests sometimes go silent?

I use the following codes to download historical data. Most of the times it works no problem, but sometimes it goes silent, no errors reported and just nothing. I would close and re-open the terminal to re-run (same parameters), and then it would work so not a code problem or connection issue (which is raised at code 502).

I want to set a timeout, get it done in 1 min or kill it, similar to Future.get(timeout, timeoutUNIT) . But I don't want to complicate things and to any threading/Callable. EReader methods and EReaderSignal.waitForSignal don't have a timeout parameter.

Where/how shall I set a timeout here?

Code:

public static void main (String[] args) throws IOException {
        downloader = getDownloader(); //calling constructor
        downloader.start();        
  }

public void start() throws IOException {
        this.openConnection(portNumber); //connect to TWS
        this.request(1);  //for TRADES
        this.request(2); //for BID
        this.request(3);  //for ASK

        while ( !this.isBidRequestDone || !this.isAskRequestDone || !this.isTradesRequestDone  ) { 
            this.readerSignal.waitForSignal();
            try {
                this.reader.processMsgs(); //trigger callback
            } catch (IOException err) {
                throw new IOException(err);
            }
        } 
        this.saveData(); 
        this.closeConnection(); 
 }

private void request(int reqId) {
        this.setContract();
        this.client.reqHistoricalData(reqId, ...<parameters>);
    }

public void historicalDataEnd(int reqId, String startDateStr, String endDateStr)  {
        switch (reqId) {
            case 1 -> this.isTradesRequestDone = true; 
            case 2 -> this.isBidRequestDone = true;
            case 3 -> this.isAskRequestDone = true;
        }
    }

private void openConnection(int port) { 
        this.readerSignal = new EJavaSignal(); 
        this.client = new EClientSocket(this, this.readerSignal);
        this.client.eConnect("127.0.0.1", port, 0); 
        this.reader = new EReader(this.client, this.readerSignal); 
        this.reader.start(); 
    }