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https://issues.apache.org/jira/browse/PHOENIX-3797?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16032445#comment-16032445
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Lars Hofhansl commented on PHOENIX-3797:
----------------------------------------
Sorry for the many comments. It turns out the repair scanner is trying to
rebuild the local index during the compaction while scanning along the main
column families, and that's why the index writes can be out of order.
The idea is pretty clever! [~an...@apache.org]
And hence your new idea of writing the index update through the region, so that
they will get sorted.
So that can work. For large regions that would lead to a lot of HFiles, though
(for a 10g region with 256mb flush size it would lead to 40 files after the
major compaction).
I think my idea of rewriting the index data from the merged index data itself
is pretty tricky, too.
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).
> 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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