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https://issues.apache.org/jira/browse/HADOOP-5465?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12682050#action_12682050
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Hudson commented on HADOOP-5465:
--------------------------------
Integrated in Hadoop-trunk #779 (See
[http://hudson.zones.apache.org/hudson/job/Hadoop-trunk/779/])
. Blocks remain under-replicated. Contributed by Hairong Kuang.
> Blocks remain under-replicated
> ------------------------------
>
> Key: HADOOP-5465
> URL: https://issues.apache.org/jira/browse/HADOOP-5465
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Affects Versions: 0.18.3
> Reporter: Hairong Kuang
> Assignee: Hairong Kuang
> Priority: Blocker
> Fix For: 0.18.4, 0.19.2, 0.20.0, 0.21.0
>
> Attachments: xmitsSync1.patch, xmitsSync2-br18.patch, xmitsSync2.patch
>
>
> Occasionally we see some blocks remain to be under-replicated in our
> production clusters. This is what we obeserved:
> 1. Sometimes when increasing the replication factor of a file, some blocks
> belonged to this file do not get to increase to the new replication factor.
> 2. When taking meta save in two different days, some blocks remain in
> under-replication queue.
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