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https://issues.apache.org/jira/browse/HBASE-4838?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13157345#comment-13157345
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Lars Hofhansl commented on HBASE-4838:
--------------------------------------
Finally found the problem!!
It was indeed a problem in HalfStoreFileReader (as Todd and Stack have
suggested all along). HalfStoreFileReader did not have a getScanner(final
boolean cacheBlocks, final boolean pread, final boolean isCompaction) method,
and hence the super method was called returning a normal reader.
bq. Reference.java and HalfStoreFileReader.java are identical between 0.92 and
trunk
I don't know what I was comparing here (must have been late in the night), but
they are different and that difference was exactly the problem. Could have
saved myself about 16 hours of debugging.
> Port 2856 (TestAcidGuarantee is failing) to 0.92
> ------------------------------------------------
>
> Key: HBASE-4838
> URL: https://issues.apache.org/jira/browse/HBASE-4838
> Project: HBase
> Issue Type: Sub-task
> Reporter: Lars Hofhansl
> Assignee: Lars Hofhansl
> Fix For: 0.92.0
>
> Attachments: 4838-v1.txt
>
>
> Moving back port into a separate issue (as suggested by JonH), because this
> not trivial.
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