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  1. Apache NiFi
  2. NIFI-5593

ConsumeKafka_0_11 topic name variable is not evaluated correctly

    Details

    • Type: Bug
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: 1.5.0
    • Fix Version/s: None
    • Component/s: None
    • Labels:
      None
    • Environment:
      RHEL 7.3
      JAVA Oracle 1.8.0_144
      NiFi 1.5.0
      Processor name "ConsumeKafka_0_11"

      Description

      Hi guys,

      Found that "Topic Name" specified as expression "dmp_order_${now() :minus(3600000) :format('HH') }" is not evaluated correctly in "ConsumeKafka_0_11" processor after next hour begins.
      It is evaluated as expected after processor start/restart only.

      Say, the processor is started at 15:05. Value of "Topic name" variable will be "dmp_order_14". It's correct. It will consume data from the topic and everything is ok.
      After next hour begins, value of "Topic name" is not evaluated as "dmp_order_15". I see that consumer still tries to consume data from topic with name "dmp_order_14".
      I tried both Scheduling strategies "Timer driven" and "CRON driven" but have no success. Seems, I have to restart processor every time I want to re-evalueate "Topic name" variable.

      When I filled CustomText field with now() expression in "GenerateFlowFile" processor I didn't have such issues. It worked as expected with "CRON driven" strategy.

      Can you say is it a bug or normal behaviour for ConsumeKafka processor?
      And if it is a normal behaviour can you say is there any opportunity to change "Topic name" dynamically in running processor?

        Attachments

        1. proc_sched.PNG
          22 kB
          Georgy
        2. proc_prop.PNG
          48 kB
          Georgy
        3. proc_sett.PNG
          39 kB
          Georgy

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            People

            • Assignee:
              Unassigned
              Reporter:
              maythes Georgy
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              Dates

              • Created:
                Updated: