Re: datastream.print() doesn't works

[AndreaKinn]

I call env.execute().
What do you mean for "configure the logger?"


Timo Walther wrote
> Don't forget to call env.execute() at the end and make sure you have 
> configured your logger correctly.
> 
> Regards,
> Timo
> 
> Am 29.08.17 um 14:59 schrieb Chesnay Schepler:
>> The easiest explanation is that there is nothing to print.
>>
>> Since print statements within the select function don't appear in the 
>> logs I assume
>> that the result of HTM.learn is empty.
>>
>> Please check via the webUI or metrics whether any of these operations 
>> actually return records.
>>
>> On 29.08.2017 13:19, AndreaKinn wrote:
>>> Hi,
>>> I have a simple datastream of a Tuple2. Unfortunately when I call the
>>> print() method. No one output is showed although no errors or 
>>> exceptions are
>>> raised.
>>> I want to highlight that I have also other data streams which are 
>>> correctly
>>> printed.
>>>
>>> This is the stream:
>>>
>>> /DataStream<Tuple2<Double,Double>> result =
>>> HTM.learn(kafkaStream, 
>>> new
>>> Harness.AnomalyNetwork())
>>>                 .select(new
>>> InferenceSelectFunction<Harness.KafkaRecord,
> >> Tuple2<Double, Double>>() {
>>>                       @Override
>>>                                            public
>>> Tuple2<Double,Double>
>>> select(Tuple2<Harness.KafkaRecord, NetworkInference> inference)
>>> throws
>>> Exception {
>>>                                   return new Tuple2<Double, 
> >> Double>(3.14444,
>>> inference.f1.getAnomalyScore());
>>>                                           }
>>> });/
>>>
>>> I'm quite sure the problem isn't in the particular function described 
>>> above
>>> because effectively in inner functions of getAnomalyScore for example 
>>> the
>>> return value exists.
>>>
>>> Anyway I'm not able to find the problem which doesn't allow to print the
>>> stream so I thought to write here to discover if there are typical 
>>> situation
>>> where streams are not printed. How can I verify and debug the 
>>> problem? Some
>>> hints about it ? I really tried everything, also tried to print 
>>> something in
>>> the function select() for example, with no results
>>>
>>>
>>>
>>> -- 
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>>> http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/datastream-print-doesn-t-works-tp15223.html
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