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https://issues.apache.org/jira/browse/FLINK-29617?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17616855#comment-17616855
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luoyuxia edited comment on FLINK-29617 at 10/13/22 9:06 AM:
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[~dangshazi] Thanks for raising it and detail explanation. I'll be much
appreciated that you can take the ticket. If you don't have time, maybe I can
help take it.
I'm fine with these two suggestions. But prefer suggestion 2 since suggestion 1
will bring new option which user may hardly know it.
I have one question, have you ever tried with these suggestions? If so, what's
the improvement of these two suggestions?
Btw, the images uploaded is . Could you please upload them again?
was (Author: luoyuxia):
[~dangshazi] Thanks for raising it and detail explanation. I'll be much
appreciated that you can take the ticket.
I'm fine with these two suggestions. But prefer suggestion 2 since suggestion 1
will bring new option which user may hardly know it.
I have one question, have you ever tried with these suggestions? If so, what's
the improvement of these two suggestions?
Btw, the images uploaded is . Could you please upload them again?
> Cost too much time to start SourceCoordinator of hdfsFileSource when start
> JobMaster
> ------------------------------------------------------------------------------------
>
> Key: FLINK-29617
> URL: https://issues.apache.org/jira/browse/FLINK-29617
> Project: Flink
> Issue Type: Improvement
> Components: Connectors / FileSystem, Runtime / Coordination
> Affects Versions: 1.15.2
> Reporter: LI Mingkun
> Priority: Major
> Labels: coordination, file-system
>
> h1. Scenario:
> Our user use flink batch to compact small files in one day. Flink version :
> 1.15
> He split pipeline into 24 for each hour. So there are 24 source
>
> I find it costs too much time to start SourceCoordinator of hdfsFileSource
> when start JobMaster
>
> as follow:
>
> !https://mail.google.com/mail/u/0?ui=2&ik=488d9ac3dd&attid=0.1&permmsgid=msg-a:r-3013789195315215531&th=183cb292e567fd9f&view=fimg&fur=ip&sz=s0-l75-ft&attbid=ANGjdJ9SVAoAslMUGQdVQJ_ccmEf4LxhaONYKJvS_V8nvijvT3JXw_VlyRBAEE9EQhTtWdYPa4TLCO5rxjXGrTDK2_PGHX4RZDPTQTJ0LwKXAUr4BYlMhYZsjcrY9eo&disp=emb&realattid=ii_l95bh7qy0|width=542,height=260!
>
> h1. Root Cause:
> I got the root cause after check:
> # AbstractFileSource will enumerateSplits when createEnumerator
> # NotSplittingRecursiveEnumerator need to get fileblockLocation of every
> fileblock which is a heavy IO operation
> !https://mail.google.com/mail/u/0?ui=2&ik=488d9ac3dd&attid=0.3&permmsgid=msg-a:r-3013789195315215531&th=183cb292e567fd9f&view=fimg&fur=ip&sz=s0-l75-ft&attbid=ANGjdJ8AoT071eCNMb_q3uJtcbrUmZnYbg3ucnDelMlRRPn7WLlXOBGj650srQk9vhqKyJEANvpOWoxHuH6jNHt7g6go8JkeRUZKc81yqT0yzzz7tbBciTe-YnRVQ7w&disp=emb&realattid=ii_l95bp1832|width=542,height=456!
>
> !https://mail.google.com/mail/u/0?ui=2&ik=488d9ac3dd&attid=0.2&permmsgid=msg-a:r-3013789195315215531&th=183cb292e567fd9f&view=fimg&fur=ip&sz=s0-l75-ft&attbid=ANGjdJ9phsX1nauTsx3xWje_YJM4uUaOLXKHcXKsm7WJquPQQGC7bQTni3OhQB5HtGYVOvrD-3Kbp9LURfUj6OiIUgsZU1AImSL0vj27cnDcf7HpVpLpaqdADtpoABU&disp=emb&realattid=ii_l95bjh1g1|width=526,height=542!
>
> h1. Suggestion
> # FileSource add option to disable location fetcher
> # Move location fetcher into IOExecutor
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