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https://issues.apache.org/jira/browse/BAHIR-183?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16865399#comment-16865399
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ASF GitHub Bot commented on BAHIR-183:
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lukasz-antoniak commented on issue #84: [BAHIR-183] [WIP] HDFS based MQTT
client persistence
URL: https://github.com/apache/bahir/pull/84#issuecomment-502568352
@lresende, I would answer positive. This PR changes the way we implement
HDFS persistence due to issues pointed out in [JIRA
commant](https://issues.apache.org/jira/browse/BAHIR-183?focusedCommentId=16800091&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-16800091).
@yanlin-Lynn, can you also have a look since I changed mostly the code you
have introduced and worked on previously?
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> 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
> Assignee: Wang Yanlin
> Priority: Major
> Fix For: Spark-2.4.0
>
>
> 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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