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https://issues.apache.org/jira/browse/HBASE-20305?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16841012#comment-16841012
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Hudson commented on HBASE-20305:
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Results for branch branch-2
[build #1894 on
builds.a.o|https://builds.apache.org/job/HBase%20Nightly/job/branch-2/1894/]:
(x) *{color:red}-1 overall{color}*
----
details (if available):
(/) {color:green}+1 general checks{color}
-- For more information [see general
report|https://builds.apache.org/job/HBase%20Nightly/job/branch-2/1894//General_Nightly_Build_Report/]
(x) {color:red}-1 jdk8 hadoop2 checks{color}
-- Something went wrong running this stage, please [check relevant console
output|https://builds.apache.org/job/HBase%20Nightly/job/branch-2/1894//console].
(/) {color:green}+1 jdk8 hadoop3 checks{color}
-- For more information [see jdk8 (hadoop3)
report|https://builds.apache.org/job/HBase%20Nightly/job/branch-2/1894//JDK8_Nightly_Build_Report_(Hadoop3)/]
(/) {color:green}+1 source release artifact{color}
-- See build output for details.
(x) {color:red}-1 client integration test{color}
--Failed when running client tests on top of Hadoop 2. [see log for
details|https://builds.apache.org/job/HBase%20Nightly/job/branch-2/1894//artifact/output-integration/hadoop-2.log].
(note that this means we didn't run on Hadoop 3)
> Add option to SyncTable that skip deletes on target cluster
> -----------------------------------------------------------
>
> Key: HBASE-20305
> URL: https://issues.apache.org/jira/browse/HBASE-20305
> Project: HBase
> Issue Type: Improvement
> Components: mapreduce
> Affects Versions: 2.0.0-alpha-4
> Reporter: Wellington Chevreuil
> Assignee: Wellington Chevreuil
> Priority: Minor
> Fix For: 3.0.0, 1.5.0, 1.4.10, 2.3.0, 2.1.5, 2.2.1
>
> Attachments: 0001-HBASE-20305.master.001.patch,
> HBASE-20305.branch-1.001.patch, HBASE-20305.branch-2.001.patch,
> HBASE-20305.master.002.patch
>
>
> We had a situation where two clusters with active-active replication got out
> of sync, but both had data that should be kept. The tables in question never
> have data deleted, but ingestion had happened on the two different clusters,
> some rows had been even updated.
> In this scenario, a cell that is present in one of the table clusters should
> not be deleted, but replayed on the other. Also, for cells with same
> identifier but different values, the most recent value should be kept.
> Current version of SyncTable would not be applicable here, because it would
> simply copy the whole state from source to target, then losing any additional
> rows that might be only in target, as well as cell values that got most
> recent update. This could be solved by adding an option to skip deletes for
> SyncTable. This way, the additional cells not present on source would still
> be kept. For cells with same identifier but different values, it would just
> perform a Put for the cell version from source, but client scans would still
> fetch the most recent timestamp.
> I'm attaching a patch with this additional option shortly. Please share your
> thoughts.
>
>
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