Re: Valuestate is not saving the state

Posted by Aljoscha Krettek on Mar 23, 2016; 10:33am
URL: http://deprecated-apache-flink-user-mailing-list-archive.369.s1.nabble.com/Valuestate-is-not-saving-the-state-tp5732p5733.html

Hi,
what is the input for each of those outputs? Could you maybe print this:

    System.out.println(in + “, current booking count "+value)

Also, what is the key that you specify for your KeyedStream?

Cheers,
Aljoscha

> On 23 Mar 2016, at 11:53, Balaji Rajagopalan <[hidden email]> wrote:
>
> I wrote the below code which will increment a counter for the data in the datastream, and when I print the counter each time it seems the value is reinitialised to 0, and it is not incrementing, any thoughts.
>
> class BookingCntFlatMapFunction extends RichFlatMapFunction[(Booking,Long,Long),(Booking,Long,Long)]
> {
>
>
>   @transient var bookingCnt:ValueState[Int] = null
>
>   override def flatMap(in: (Booking, Long, Long), out: Collector[(Booking, Long, Long)]): Unit = {
>     var value = bookingCnt.value()
>     value += 1
>     System.out.println("current booking count "+value)
>    
>     bookingCnt.update(value)
>      out.collect(in)
>   }
>
>   override def open( config:Configuration): Unit = {
>     val descriptor: ValueStateDescriptor[Int] = new ValueStateDescriptor[Int]("bookingcnt",
>       TypeInformation.of(new TypeHint[Int]() {}),0)
>     bookingCnt = getRuntimeContext().getState(descriptor);
>
>   }
>
>
> }
> Output of the program:
> current booking count 1
> current booking count 1
> current booking count 1
> current booking count 1
> current booking count 1
> current booking count 1
> current booking count 1
>