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https://issues.apache.org/jira/browse/BAHIR-183?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16707556#comment-16707556
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ASF GitHub Bot commented on BAHIR-183:
--------------------------------------

Github user lukasz-antoniak commented on the issue:

    https://github.com/apache/bahir/pull/72
  
    Would it be possible to implement integration tests with embedded HDFS just 
to make sure we do not run into regression issues?


> Using HDFS for saving message for mqtt source
> ---------------------------------------------
>
>                 Key: BAHIR-183
>                 URL: https://issues.apache.org/jira/browse/BAHIR-183
>             Project: Bahir
>          Issue Type: Improvement
>          Components: Spark Structured Streaming Connectors
>    Affects Versions: Spark-2.2.0
>            Reporter: Wang Yanlin
>            Priority: Major
>             Fix For: Spark-2.2.1
>
>
> Currently in spark-sql-streaming-mqtt, the received mqtt message is saved in 
> a local file by driver, this will have the risks of losing data for cluster 
> mode when application master failover occurs. So saving in-coming mqtt 
> messages using a director in checkpoint will solve this problem.



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