Hi,
Here is the almost full bolt I am using which causing that exception:
public class AsyncBolt extends BaseRichBolt {
private AsyncHttpClient asyncHttpClient;
private OutputCollector outputCollector;
@Override
public void declareOutputFields(OutputFieldsDeclarer declarer) {
declarer.declare(new Fields("pushMessageResponse"));
}
@Override
public void prepare(Map stormConf, TopologyContext context,
OutputCollector collector) {
asyncHttpClient = new AsyncHttpClient();
outputCollector = collector;
}
@Override
public void execute(final Tuple tuple) {
final PushMessageRequestDTO pushMessageRequestDTO =
(PushMessageRequestDTO) tuple.getValueByField("pushMessage");
String url = "some.url";
asyncHttpClient.preparePost(url).execute(new
AsyncCompletionHandler<Response>() {
@Override
public Response onCompleted(Response response) throws Exception
{
PushMessageResponseDTO pushMessageResponseDTO = new
PushMessageResponseDTO(pushMessageRequestDTO);
emitTuple(pushMessageResponseDTO, tuple);
return response;
}
});
}
//we are synchronizing basicOutputCollector
// because we have callbacks and we need to make sure all acks are
called from the same thread
private void emitTuple(PushMessageResponseDTO pushMessageResponseDTO,
Tuple tuple) {
synchronized (outputCollector) {
outputCollector.emit(tuple, new Values(pushMessageResponseDTO));
outputCollector.ack(tuple);
}
}
}
2015-02-10 20:27 GMT+02:00 Idan Fridman <idan.frid@gmail.com>:
> Yes I cutted those from this post for the sake simplicity aswell. I can
> past the whole bolt it just has some intern logic
> On Feb 10, 2015 8:14 PM, "Michael Rose" <michael@fullcontact.com> wrote:
>
>> Your output fields declarer isn't invoked. Is it empty in your actual
>> implementation as well?
>>
>> Perhaps you can post a gist with your full file?
>>
>> *Michael Rose*
>> Senior Platform Engineer
>> *Full*Contact | fullcontact.com
>> <https://www.fullcontact.com/?utm_source=FullContact%20-%20Email%20Signatures&utm_medium=email&utm_content=Signature%20Link&utm_campaign=FullContact%20-%20Email%20Signatures>
>> m: +1.720.837.1357 | t: @xorlev
>>
>>
>> All Your Contacts, Updated and In One Place.
>> Try FullContact for Free
>> <https://www.fullcontact.com/?utm_source=FullContact%20-%20Email%20Signatures&utm_medium=email&utm_content=Signature%20Link&utm_campaign=FullContact%20-%20Email%20Signatures>
>>
>> On Tue, Feb 10, 2015 at 11:05 AM, Idan Fridman <idan.frid@gmail.com>
>> wrote:
>>
>>> I actually created pojo of mine and emitted it. I edited here the code
>>> for the sake of simplicity. So you think I should try convert the Object
>>> into byte/string and then emmit? What about the outputcollector
>>> synchronizing ? Does it make sense?
>>> On Feb 10, 2015 8:00 PM, "Michael Rose" <michael@fullcontact.com> wrote:
>>>
>>>> Out of curiosity, have you tried just emitting the response as a
>>>> string/byte array vs. the whole response object?
>>>>
>>>> *Michael Rose*
>>>> Senior Platform Engineer
>>>> *Full*Contact | fullcontact.com
>>>> <https://www.fullcontact.com/?utm_source=FullContact%20-%20Email%20Signatures&utm_medium=email&utm_content=Signature%20Link&utm_campaign=FullContact%20-%20Email%20Signatures>
>>>> m: +1.720.837.1357 | t: @xorlev
>>>>
>>>>
>>>> All Your Contacts, Updated and In One Place.
>>>> Try FullContact for Free
>>>> <https://www.fullcontact.com/?utm_source=FullContact%20-%20Email%20Signatures&utm_medium=email&utm_content=Signature%20Link&utm_campaign=FullContact%20-%20Email%20Signatures>
>>>>
>>>> On Tue, Feb 10, 2015 at 9:30 AM, Idan Fridman <idan.frid@gmail.com>
>>>> wrote:
>>>>
>>>>> One note: it's not BasicOutputCollector. but OutputCollector
>>>>>
>>>>> 2015-02-10 18:29 GMT+02:00 Idan Fridman <idan.frid@gmail.com>:
>>>>>
>>>>>> I am opening async call to a webservice from a bolt.
>>>>>>
>>>>>> I'am opening socket and retrieving the result asynchronous(using
>>>>>> external AsycHttpClient library) and after that I am emitting to
the next
>>>>>> bolt
>>>>>>
>>>>>> I asked and read that if I synchronized the outputCollector it will
>>>>>> make sure all that all acks and callbacks will be called from the
same
>>>>>> Thread.
>>>>>>
>>>>>> However after load-test I started to get this:
>>>>>>
>>>>>>
>>>>>> java.lang.RuntimeException: java.lang.NullPointerException at
>>>>>> backtype.storm.utils.DisruptorQueue.consumeBatchToCursor(DisruptorQueue.java:128)
>>>>>> at
>>>>>> backtype.storm.utils.DisruptorQueue.consumeBatchWhenAvailable(DisruptorQueue.java:99)
>>>>>> at
>>>>>> backtype.storm.disruptor$consume_batch_when_available.invoke(disruptor.clj:80)
>>>>>> at
>>>>>> backtype.storm.disruptor$consume_loop_STAR_$fn__1460.invoke(disruptor.clj:94)
>>>>>> at backtype.storm.util$async_loop$fn__464.invoke(util.clj:463) at
>>>>>> clojure.lang.AFn.run(AFn.java:24) at java.lang.Thread.run(Thread.java:745)
>>>>>> Caused by: java.lang.NullPointerException at
>>>>>> clojure.lang.RT.intCast(RT.java:1087) at
>>>>>> backtype.storm.daemon.worker$mk_transfer_fn$fn__3549.invoke(worker.clj:129)
>>>>>> at
>>>>>> backtype.storm.daemon.executor$start_batch_transfer__GT_worker_handler_BANG_$fn__3283.invoke(executor.clj:258)
>>>>>> at
>>>>>> backtype.storm.disruptor$clojure_handler$reify__1447.onEvent(disruptor.clj:58)
>>>>>>
>>>>>> Thats my bolt:
>>>>>>
>>>>>> public class AsyncBolt extends BaseRichBolt {
>>>>>>
>>>>>> ...
>>>>>>
>>>>>> @Override
>>>>>> public void declareOutputFields(OutputFieldsDeclarer declarer)
{
>>>>>> }
>>>>>>
>>>>>>
>>>>>> @Override
>>>>>> public void prepare(Map stormConf, TopologyContext context,
>>>>>> OutputCollector collector) {
>>>>>> asyncHttpClient = new AsyncHttpClient();
>>>>>> outputCollector = collector;
>>>>>> }
>>>>>>
>>>>>>
>>>>>> @Override
>>>>>> public void execute(final Tuple tuple) {
>>>>>>
>>>>>> asyncHttpClient.preparePost(url).execute(new
>>>>>> AsyncCompletionHandler<Response>() {
>>>>>> @Override
>>>>>> public Response onCompleted(Response response) throws
>>>>>> Exception {
>>>>>> ...
>>>>>> emitTuple(response, tuple);
>>>>>> return response;
>>>>>> }
>>>>>> });
>>>>>> }
>>>>>> //we are synchronizing basicOutputCollector
>>>>>> // because we have callbacks and we need to make sure all acks
>>>>>> are called from the same thread
>>>>>> private void emitTuple(Response response, Tuple tuple) {
>>>>>> synchronized (outputCollector) {
>>>>>> outputCollector.emit(tuple, new Values(response));
>>>>>> outputCollector.ack(tuple);
>>>>>> }
>>>>>> }
>>>>>> }
>>>>>>
>>>>>> Please any leads about that?
>>>>>>
>>>>>> Thank you.
>>>>>>
>>>>>
>>>>
>>
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