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https://issues.apache.org/jira/browse/HBASE-15218?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15134772#comment-15134772
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Anoop Sam John commented on HBASE-15218:
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In case of WALCellCodec we were writing the Tags in WAL. While reading back
from WAL, we were using KVCodec which will make a Cell instance which is
actually reading back the Tag bytes. But the object we make is NoTagsKeyValue
which says 0 as tagsLength. From then onwards all tags for this Cell is like
lost.
In case of SecureWALCellCodec, we were even not writing tags to WAL. This
issue fixed all these cases in WAL area.
> On RS crash and replay of WAL, loosing all Tags in Cells
> --------------------------------------------------------
>
> Key: HBASE-15218
> URL: https://issues.apache.org/jira/browse/HBASE-15218
> Project: HBase
> Issue Type: Bug
> Components: Recovery, regionserver, security
> Affects Versions: 2.0.0, 0.98.13, 1.0.2, 1.2.0, 1.1.1
> Reporter: Anoop Sam John
> Assignee: Anoop Sam John
> Priority: Blocker
> Fix For: 2.0.0, 1.2.0, 1.3.0, 1.1.4, 1.0.4, 0.98.18
>
> Attachments: HBASE-15218-0.98.patch, HBASE-15218-branch-1.1.patch,
> HBASE-15218-branch-1.2.patch, HBASE-15218.patch
>
>
> The KeyValueCodec's Decoder makes NoTagsKeyValue. The WalCellCodec also makes
> this Decoder and so while reading Cells after RS crash, we will loose all
> tags in Cells.
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