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Posted to dev@tephra.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2017/06/21 01:22:00 UTC
[jira] [Commented] (TEPHRA-235) Flushes and compactions can remove
committed data
[ https://issues.apache.org/jira/browse/TEPHRA-235?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16056780#comment-16056780 ]
ASF GitHub Bot commented on TEPHRA-235:
---------------------------------------
GitHub user anwar6953 opened a pull request:
https://github.com/apache/incubator-tephra/pull/44
TEPHRA-235 Ensure that TransactionSnapshot always have a sorted invalid transaction list
[TEPHRA-235](https://issues.apache.org/jira/browse/TEPHRA-235) Ensure that TransactionSnapshot always have a sorted invalid transaction list.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/anwar6953/incubator-tephra bugfix_release/TEPHRA-235
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-tephra/pull/44.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #44
----
commit 9d482be0aaf58b296931c440b393e59976c38eab
Author: Ali Anwar <an...@berkeley.edu>
Date: 2017-06-21T01:15:56Z
TEPHRA-235 Ensure that TransactionSnapshot always have a sorted invalid transaction list.
----
> Flushes and compactions can remove committed data
> -------------------------------------------------
>
> Key: TEPHRA-235
> URL: https://issues.apache.org/jira/browse/TEPHRA-235
> Project: Tephra
> Issue Type: Bug
> Components: core
> Affects Versions: 0.11.0-incubating, 0.12.0-incubating
> Reporter: Poorna Chandra
> Assignee: Poorna Chandra
> Priority: Blocker
> Fix For: 0.13.0-incubating
>
>
> Transaction co-processor uses the transaction snapshot generated by the Transaction Manager to remove deleted and invalid cells during HBase compactions and flushes. The co-processor expects the invalid list in the transaction snapshot to be sorted. However, the invalid list is not sorted during a snapshot creation in the Transaction Manager. This leads to invalid transactions becoming visible during compactions, and thus committed transactions with write pointers smaller than the invalid transaction will get removed.
> We missed this piece when fixing TEPHRA-223.
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