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HadoopFS destination not firing Event to "invalidate metadata" for Impala

asked 2018-01-04 09:36:28 -0500

gaurav gravatar image

Hi Everyone, I am trying to replicate a database (MySQL) to Hive using the following blog post:

As I add a new record in one of the source tables in MySQL it gets replicated to Hive (verified successfully), however the event which should be fired by HadoopFS destination to "invalidate metadata" for Impala by Hive Query executor is not working. I checked the dashboard of workflow and there is NO event getting fired.

I have checked and verified each config details from the blog post and it's all good.

Can anyone guide me as to what could be the issue.

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answered 2018-01-04 18:03:51 -0500

metadaddy gravatar image

If the Hadoop FS destination is not firing the event, then it likely isn't closing the file. Take a look at the destination's idle timeout configuration; by default, the Hadoop FS destination will wait for an hour before closing the output file.

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Thanks Pat, it worked.Quick question. Stopped and reran pipeline & tried to add a new record in "departments" table, it got appended in hive. Impala could fetch it(without me running "invalidate metadata") but in dashboard there was NO event fired. I inserted 1 more rec and event was fired. Why?

gaurav gravatar imagegaurav ( 2018-01-04 22:21:39 -0500 )edit
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Asked: 2018-01-04 09:34:59 -0500

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Last updated: Jan 04 '18