[GitHub] [hudi] nsivabalan commented on issue #8132: [SUPPORT] data loss in new base file after compaction

2023-04-28 Thread via GitHub


nsivabalan commented on issue #8132:
URL: https://github.com/apache/hudi/issues/8132#issuecomment-1528118945

   hey @coffee34 : The code that you pointed out where inserts converted to 
updates is not applicable to bloom and simple index. Those are meant for few 
other index types. But for these two indexes, inserts will always go into a new 
base file and only update can go into log files.
   
   From the info provided, we could not get any leads and we don't see any 
other data loss reports from the community. We do have some reports around 
global index, but those will surface differently. 
   
   What you are reporting is completely diff. Can you provide us w/ a full 
backup of ".hoodie" and write configs. but as of now, we can't think of any 
reason why such huge data loss can occur. 
   
   unless you changed the record key / partition path config for instance. Do 
you happen to know any changes to your pipelines around the time where you see 
data loss. 
   like any config updates. or anything of those sort. 
   If you have a back up of the file slice in question, we can try to copy them 
locally(on your end) and trigger compaction and debug whats going on. 
   


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[GitHub] [hudi] nsivabalan commented on issue #8132: [SUPPORT] data loss in new base file after compaction

2023-04-27 Thread via GitHub


nsivabalan commented on issue #8132:
URL: https://github.com/apache/hudi/issues/8132#issuecomment-1527027664

   hey @coffee34 : can you help us w/ any more info on this end. we are taking 
a serious look into all data consistency issues. So, interested in getting to 
the bottom of it. 


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[GitHub] [hudi] nsivabalan commented on issue #8132: [SUPPORT] data loss in new base file after compaction

2023-03-17 Thread via GitHub


nsivabalan commented on issue #8132:
URL: https://github.com/apache/hudi/issues/8132#issuecomment-1473201894

   got it. thanks. since this is w/ 0.7.0, I am not sure if we had fixed 
anything on this already. is it feasible to upgrade to 012.2 or 0.13.0 ? you 
will definitely get all new features, perf etc. 
   


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[GitHub] [hudi] nsivabalan commented on issue #8132: [SUPPORT] data loss in new base file after compaction

2023-03-11 Thread via GitHub


nsivabalan commented on issue #8132:
URL: https://github.com/apache/hudi/issues/8132#issuecomment-1465088037

   Do you know if there could be any unintentional multi-writer interplay? 


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[GitHub] [hudi] nsivabalan commented on issue #8132: [SUPPORT] data loss in new base file after compaction

2023-03-11 Thread via GitHub


nsivabalan commented on issue #8132:
URL: https://github.com/apache/hudi/issues/8132#issuecomment-1465087986

   I can't seem to find any reason why this could happen. but don't think 8079 
is the issue. that would surface differently. 
   anyways, 0.7.0 is very old. We have come a long way from 0.7.0. We have 
fixed issues w/ compaction and spark cache invalidation
   For eg https://github.com/apache/hudi/pull/4753
   https://github.com/apache/hudi/pull/4856 
   but I could not exactly say if these are the issues.
   But from the timeline provided, I could not reason about why parquet size 
might reduce. infact number of records reduced by 50% from previous version, 
even though log file modified just 100 ish records :( 


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[GitHub] [hudi] nsivabalan commented on issue #8132: [SUPPORT] data loss in new base file after compaction

2023-03-11 Thread via GitHub


nsivabalan commented on issue #8132:
URL: https://github.com/apache/hudi/issues/8132#issuecomment-1465087152

   I am not sure if this was related to 
https://github.com/apache/hudi/pull/8079 
   I am trying to analyze all details. will update if I have any findings. 


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