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https://issues.apache.org/jira/browse/HADOOP-4961?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12660109#action_12660109
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Konstantin Shvachko commented on HADOOP-4961:
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Unit tests: BUILD SUCCESSFUL
> ConcurrentModificationException in lease recovery of empty files.
> -----------------------------------------------------------------
>
> Key: HADOOP-4961
> URL: https://issues.apache.org/jira/browse/HADOOP-4961
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Affects Versions: 0.18.0
> Reporter: Konstantin Shvachko
> Assignee: Konstantin Shvachko
> Priority: Blocker
> Fix For: 0.18.3
>
> Attachments: CMEinLeaseRecovery-0-18.patch, CMEinLeaseRecovery.patch,
> TestLeaseExpire.java
>
>
> The problem is that internalReleaseLease() finalizes empty files, which
> removes these file path names from the lease. So this modifies the Collection
> of file names which {{LeaseManager.checkLeases()}} is iterating on.
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