Dear Apache Pulsar Team,
I hope this email finds you well. I am writing to seek clarification
regarding the *deadLetterPolicy* attribute in the
*ConsumerConfigurationData* class within Apache Pulsar.
As a user of Apache Pulsar, we have been utilizing *PulsarSpout* exposed by
the pulsar-storm adaptor within an Apache Storm topology for message
consumption from Pulsar topics. Recently, we encountered an issue where the
*deadLetterPolicy* that we set on the *PulsarSpout* seems to be lost when
the topology is started. Upon investigation, we found that the
*deadLetterPolicy* attribute in *ConsumerConfigurationData* is marked as
*transient*.
Due to Storm topologies being serialized and transferred from the nimbus to
workers for execution, the transient nature of this attribute results in
the loss of our specified configuration. Could you kindly provide insights
into why this attribute is marked as transient and how we can ensure that
the *deadLetterPolicy* configuration persists across the serialization
process in Apache Storm?
We believe that implementing the *java.io.Serializable* interface in the
*DeadLetterPolicy* class should eliminate the need for the *transient*
keyword. If this is accurate, we are prepared to submit a pull request
accordingly.
Any advice or best practices for managing this scenario within Apache Storm
using Pulsar would be greatly appreciated.
Thank you very much for your assistance. Looking forward to your response.
Best regards,
Anurag
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