Bad ipc.client.connection.idle-scan-interval.ms cause resource leaks

private void scheduleIdleScanTask() {
  ...
  TimerTask idleScanTask = new TimerTask(){
    @Override
    public void run() {
      ...
      try {
        closeIdle(false);
      } finally {
        // explicitly reschedule so next execution occurs relative
        // to the end of this scan, not the beginning
        scheduleIdleScanTask();
      }
    }
  };
  idleScanTimer.schedule(idleScanTask, idleScanInterval);   // <--- idleScanInterval is a negative value
}

public void schedule(TimerTask task, long delay) {
    if (delay < 0)
        throw new IllegalArgumentException("Negative delay.");
    sched(task, System.currentTimeMillis()+delay, 0);        // <-- the task will not be scheduled when delay is negative
}

java.lang.AssertionError: Leaked 142 file descriptors
        at org.junit.Assert.fail(Assert.java:89)
        at org.junit.Assert.assertTrue(Assert.java:42)
        at org.apache.hadoop.ipc.TestIPC.testSocketLeak(TestIPC.java:1155)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:566)
        at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
        at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
        at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
        at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
        at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:299)
        at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:293)
        at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
        at java.base/java.lang.Thread.run(Thread.java:829)