ConnectionPoolTimeoutException: timeout waiting for connection from pool - httpclient

Question

I have app that keep calling an api for json data, and pretty quickly i saw this 'Timeout waiting for connection from pool' exception, I googled around and found that's a connection leak caused by content not consumed, so i updated the code to close the inputstream after consume the jsondata, but still got those connection timeout exception, here is my code:
InputStream is = ApiUtil.getAsStream(Api.get(bookUrl).param("limit","500").param("bookId", bid).enable(Options.LongRunning), 3);
List<JsonBook> books = mapper.readValue(is, BOOK_TYPE);
is.close()
Api:
private JsonHttpClient client;
public APIForGet get(String endpoint) {
return new APIForGet(this.client, endpoint);
}
ApiUtil:
public static InputStream getAsStream(APIForGet get, Iterable<Long>retries) {
return get.asStream();
}
APIForGet:
private JsonHttpClient client;
public InputStream asStream() {
return this.client.getAsStream(this.hostname, this.port, this.endpoint, params, optionsArray());
}
JsonHttpClientImpl:
public InputStream getAsStream(Optional<String> host, Optional<Integer> port,String path, Multimap<String, String> param, Options ... options) {
HttpResponse reponse;
try {
response = request.execute();
if (response.isSuccessStatusCode()) {
return response.getContent();
}
} catch (Exception e) {
throw new Exception();
}
}
the wrapping logic here is kind of complicated, but eventually i think by closing the inputstream should work, any thoughts? Thanks!

Answer 1

try {
response = request.execute();
if (response.isSuccessStatusCode()) {
return response.getContent();
}
} catch (Exception e) {
throw new Exception();
}finally{
//TODO release conn or abort
}