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Date: Thu, 3 Mar 2011 20:57:36 +0000 (UTC)
From: "Suresh Srinivas (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
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Subject: [jira] Updated: (HDFS-1717) Federation: FSDataset volumeMap access
 is not correctly synchronized
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     [ https://issues.apache.org/jira/browse/HDFS-1717?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Suresh Srinivas updated HDFS-1717:
----------------------------------

    Attachment: HDFS-1717.patch

In the attached patch:
- Access to FSDataset#volumeMap is always synchronized using FSDataset.this
- Some of the FSDataset members are made final.

> Federation: FSDataset volumeMap access is not correctly synchronized 
> ---------------------------------------------------------------------
>
>                 Key: HDFS-1717
>                 URL: https://issues.apache.org/jira/browse/HDFS-1717
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: data-node
>    Affects Versions: Federation Branch
>            Reporter: Suresh Srinivas
>            Assignee: Suresh Srinivas
>             Fix For: Federation Branch
>
>         Attachments: HDFS-1717.patch
>
>
> FSDataset volumeMap access has several issues:
> # Access to it is not synchronized all the time, using FSDataset.this as lock, as expected.
> # It is synchronized using different locks.

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