grpc-java: DNS resolution expiration

It looks like the channel is somehow caching the IP resolved through DNS but never refreshing it. We are using grpc in AWS and since ELB’s IPs change over time, we’ve run into issues and found out grpc clients are trying to connect to an old IP.

Code snippet:

private[this] val channel = NettyChannelBuilder.forAddress(httpHost, httpPort).negotiationType(NegotiationType.PLAINTEXT).build();
  private[this] val blockingStub = CrudGrpc.newBlockingStub(channel)
  private[this] def getStub = blockingStub.withDeadlineAfter(timeout.toNanos, TimeUnit.NANOSECONDS)

override def getEntity(id: String): Entity = {
  getStub.getEntity(id)
}

Is our assumption correct? Is there any issue in how are we using the client library? Would it be a bad practice (performance-wise at least) to create a new channel in each request?

Thanks in advance