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From "Ewan Higgs (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-13794) [PROVIDED Phase 2] Teach BlockAliasMap.Writer `remove` method.
Date Fri, 10 Aug 2018 18:29:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-13794?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16576694#comment-16576694
] 

Ewan Higgs commented on HDFS-13794:
-----------------------------------

{quote}
Hi [~ehiggs], thanks for posting the new patch. Quick question – can we move the refactoring
of {{TestInMemoryLevelDBAliasMapClient}} to a different JIRA? It doesn't have to be a part
of this one.{quote}
Done. I kept the fix where we use NetUtils to find an available port to make sure tests are
more robust.

> [PROVIDED Phase 2] Teach BlockAliasMap.Writer `remove` method.
> --------------------------------------------------------------
>
>                 Key: HDFS-13794
>                 URL: https://issues.apache.org/jira/browse/HDFS-13794
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Ewan Higgs
>            Assignee: Ewan Higgs
>            Priority: Major
>         Attachments: HDFS-13794-HDFS-12090.001.patch, HDFS-13794-HDFS-12090.002.patch,
HDFS-13794-HDFS-12090.003.patch
>
>
> When updating the BlockAliasMap we may need to deal with deleted blocks. Otherwise the
BlockAliasMap will grow indefinitely(!).
> Therefore, the BlockAliasMap.Writer needs a method for removing blocks.



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