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https://issues.apache.org/jira/browse/HADOOP-5644?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12697564#action_12697564
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Hairong Kuang commented on HADOOP-5644:
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+1. CommitBlockSynchronization() should not persist blocks if sync/append is
not supported.
> Namnode is stuck in safe mode
> -----------------------------
>
> Key: HADOOP-5644
> URL: https://issues.apache.org/jira/browse/HADOOP-5644
> Project: Hadoop Core
> Issue Type: Bug
> Affects Versions: 0.18.1, 0.18.2, 0.18.3, 0.19.0, 0.19.1
> Reporter: Suresh Srinivas
> Assignee: Suresh Srinivas
>
> Restarting datanodes while a client is writing to it can cause namenode to
> get stuck in safe mode.
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