hadoop-hdfs-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Suresh Srinivas (JIRA)" <j...@apache.org>
Subject [jira] Created: (HDFS-1720) Federation: FSVolumeSet volumes is not synchronized correctly
Date Thu, 03 Mar 2011 21:10:36 GMT
Federation: FSVolumeSet volumes is not synchronized correctly 

                 Key: HDFS-1720
                 URL: https://issues.apache.org/jira/browse/HDFS-1720
             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-1720.patch

Currently FSVolumeSet#volumes is package private and is exposed to outside classes:
# Only some methods (such as FSVolumeSet#checkDirs()) are synchronized on FSVolumeSet.this.
This method changes the
content of the array (sets volumes with errors to null).
# Some access to volumes are synchronized by FSDataset.this. Some access are not synchronized
at all.

I propose making FSVolumeSet#unmodifiable list. This prevents accidental mutation from outside
the class. The volumes
also are created anew when modifications are made.

This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira


View raw message