Hi All,
I wonder if anyone could take a look into it? this exception is keep
occurring to me. any leads please?
2015-02-11 10:18 GMT+02:00 Idan Fridman <idan.frid@gmail.com>:
> 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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