[
https://issues.apache.org/jira/browse/HADOOP-7001?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13042459#comment-13042459
]
Hudson commented on HADOOP-7001:
--------------------------------
Integrated in Hadoop-Common-22-branch #60 (See
[https://builds.apache.org/hudson/job/Hadoop-Common-22-branch/60/])
Merging changes r1038493 and r1038480 for HADOOP-7001 from trunk
suresh : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1130306
Files :
* /hadoop/common/branches/branch-0.22/src/docs
*
/hadoop/common/branches/branch-0.22/src/java/org/apache/hadoop/conf/ReconfigurableBase.java
* /hadoop/common/branches/branch-0.22
*
/hadoop/common/branches/branch-0.22/src/java/org/apache/hadoop/conf/Reconfigurable.java
*
/hadoop/common/branches/branch-0.22/src/java/org/apache/hadoop/conf/ReconfigurationException.java
* /hadoop/common/branches/branch-0.22/src/test/core
*
/hadoop/common/branches/branch-0.22/src/test/core/org/apache/hadoop/io/TestSequenceFile.java
* /hadoop/common/branches/branch-0.22/CHANGES.txt
* /hadoop/common/branches/branch-0.22/src/java
*
/hadoop/common/branches/branch-0.22/src/java/org/apache/hadoop/conf/Configuration.java
*
/hadoop/common/branches/branch-0.22/src/test/core/org/apache/hadoop/conf/TestReconfiguration.java
*
/hadoop/common/branches/branch-0.22/src/java/org/apache/hadoop/conf/ReconfigurationUtil.java
*
/hadoop/common/branches/branch-0.22/src/java/org/apache/hadoop/conf/ReconfigurationServlet.java
> Allow configuration changes without restarting configured nodes
> ---------------------------------------------------------------
>
> Key: HADOOP-7001
> URL: https://issues.apache.org/jira/browse/HADOOP-7001
> Project: Hadoop Common
> Issue Type: Task
> Components: conf
> Affects Versions: 0.23.0
> Reporter: Patrick Kling
> Assignee: Patrick Kling
> Fix For: 0.23.0
>
> Attachments: HADOOP-7001.2.patch, HADOOP-7001.3.patch,
> HADOOP-7001.4.patch, HADOOP-7001.5.patch, HADOOP-7001.patch,
> reconfigurable.patch
>
>
> Currently, changing the configuration on a node (e.g., the name node)
> requires that we restart the node. We propose a change that would allow us to
> make configuration changes without restarting. Nodes that support
> configuration changes at run time should implement the following interface:
> interface ChangeableConfigured extends Configured {
> void changeConfiguration(Configuration newConf) throws
> ConfigurationChangeException;
> }
> The contract of changeConfiguration is as follows:
> The node will compare newConf to the existing configuration. For each
> configuration property that is set to a different value than in the current
> configuration, the node will either adjust its behaviour to conform to the
> new configuration or throw a ConfigurationChangeException if this change is
> not possible at run time. If a configuration property is set in the current
> configuration but is unset in newConf, the node should use its default value
> for this property. After a successful invocation of changeConfiguration, the
> behaviour of the configured node should be indistinguishable from the
> behaviour of a node that was configured with newConf at creation.
> It should be easy to change existing nodes to implement this interface. We
> can start by throwing the exception for all changes and then gradually start
> supporting more and more changes at run time. (We might even consider
> replacing Configured with ChangeableConfigured entirely, but I think the
> proposal above afford greater flexibility).
--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira
