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From "Ankit Singhal (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PHOENIX-3797) Local Index - Compaction fails on table with local index due to non-increasing bloom keys
Date Thu, 01 Jun 2017 09:21:04 GMT

    [ https://issues.apache.org/jira/browse/PHOENIX-3797?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16032682#comment-16032682
] 

Ankit Singhal commented on PHOENIX-3797:
----------------------------------------

bq. Actually... Can the same thing happen with just a regular merge operation from HBaseAdmin?
No, this will not happen with the regular merge operation from HBaseAdmin as there will be
reference files created with split row as start key of 2nd region, so it is easy to detect
start key of the store file which can be used to parse the rows of daughter region during
the scan and re-write the complete data with new start key during compaction using LocalIndexStoreFileScanner
(IndexHalfStoreFileReader) 

bq. Here's yet another idea: Can we hook a scanner right above the HFiles? That scanner would
rewrite the keys based on the new region startkey. So now the store scanner for the index
would do the right thing (merge sort between the values from the HFile scanners).
yes, If we can identify the start key of the 2nd region, we can make a use of LocalIndexStoreFileScanner.
But with new region start key , we can't parse the local index data from store files of second
region.






> Local Index - Compaction fails on table with local index due to non-increasing bloom
keys
> -----------------------------------------------------------------------------------------
>
>                 Key: PHOENIX-3797
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-3797
>             Project: Phoenix
>          Issue Type: Bug
>         Environment: Head of 4.x-HBase-0.98 with PHOENIX-3796 patch applied. HBase 0.98.23-hadoop2
>            Reporter: Mujtaba Chohan
>            Assignee: Ankit Singhal
>            Priority: Blocker
>             Fix For: 4.11.0
>
>         Attachments: PHOENIX-3797.patch, PHOENIX-3797_v2.patch
>
>
> Compaction fails on table with local index.
> {noformat}
> 2017-04-19 16:37:56,521 ERROR [RS:0;host:59455-smallCompactions-1492644947594] regionserver.CompactSplitThread:
Compaction failed Request = regionName=FHA,00Dxx0000001gES005001xx000003DGPd,1492644985470.92ec6436984981cdc8ef02388005a957.,
storeName=L#0, fileCount=3, fileSize=44.4 M (23.0 M, 10.7 M, 10.8 M), priority=7, time=7442973347247614
> java.io.IOException: Non-increasing Bloom keys: 00Dxx0000001gES005001xx000003DGPd\x00\x00\x80\x00\x01H+&\xA1(00Dxx0000001gER001001xx000003DGPb01739544DCtf
   after 00Dxx0000001gES005001xx000003DGPd\x00\x00\x80\x00\x01I+\xF4\x9Ax00Dxx0000001gER001001xx000003DGPa017115434KTM
  
> 	at org.apache.hadoop.hbase.regionserver.StoreFile$Writer.appendGeneralBloomfilter(StoreFile.java:960)
> 	at org.apache.hadoop.hbase.regionserver.StoreFile$Writer.append(StoreFile.java:996)
> 	at org.apache.hadoop.hbase.regionserver.compactions.Compactor.performCompaction(Compactor.java:428)
> 	at org.apache.hadoop.hbase.regionserver.compactions.Compactor.compact(Compactor.java:276)
> 	at org.apache.hadoop.hbase.regionserver.compactions.DefaultCompactor.compact(DefaultCompactor.java:64)
> 	at org.apache.hadoop.hbase.regionserver.DefaultStoreEngine$DefaultCompactionContext.compact(DefaultStoreEngine.java:121)
> 	at org.apache.hadoop.hbase.regionserver.HStore.compact(HStore.java:1154)
> 	at org.apache.hadoop.hbase.regionserver.HRegion.compact(HRegion.java:1559)
> 	at org.apache.hadoop.hbase.regionserver.CompactSplitThread$CompactionRunner.doCompaction(CompactSplitThread.java:502)
> 	at org.apache.hadoop.hbase.regionserver.CompactSplitThread$CompactionRunner.run(CompactSplitThread.java:540)
> 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> 	at java.lang.Thread.run(Thread.java:722)
> {noformat}



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