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A developer receives a channel error when attempting to batch publish with transactions in RabbitMQ. What is a likely cause?

medium📝 Troubleshoot Q7 of 15
RabbitMQ - Performance Tuning
A developer receives a channel error when attempting to batch publish with transactions in RabbitMQ. What is a likely cause?
ACalling txCommit() without first calling txSelect() on the channel
BPublishing messages without enabling publisher confirms
CUsing basicPublish with an invalid routing key format
DNot setting the exchange to 'amq.direct' before publishing
Step-by-Step Solution
Solution:

  1. Step 1: Review transaction usage

    Transactions require txSelect() to start a transaction on the channel.

  2. Step 2: Identify common error

    Calling txCommit() without txSelect() causes channel errors.

  3. Final Answer:

    Calling txCommit() without first calling txSelect() on the channel -> Option A

  4. Quick Check:

    Transactions must be explicitly started before commit [OK]
Quick Trick: Always call txSelect() before txCommit() [OK]
Common Mistakes:
MISTAKES
  • Skipping txSelect() before committing transactions
  • Confusing transactions with publisher confirms
  • Assuming exchange type affects transaction errors

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