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https://issues.apache.org/jira/browse/HDFS-17327?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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huangzhaobo updated HDFS-17327:
-------------------------------
    Summary: Fix ReconfigurableBase class's reconfigureProperty method judgment 
logic.  (was: Fix the judgment logic of the ReconfigurableBase class method 
reconfigureProperty.)

> Fix ReconfigurableBase class's reconfigureProperty method judgment logic.
> -------------------------------------------------------------------------
>
>                 Key: HDFS-17327
>                 URL: https://issues.apache.org/jira/browse/HDFS-17327
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: huangzhaobo
>            Assignee: huangzhaobo
>            Priority: Blocker
>              Labels: pull-request-available
>
> 1. If it is a null value, after reconfig, the current system value will take 
> effect and not necessarily the default value.
> 2. {{ReconfigurableBase#reconfigureProperty}} judges the condition 
> incorrectly, When the effectValue is not null, the system value needs to be 
> changed.
> 3. In other words, certain variables actually have effected, but the current 
> configuration of the system is refreshed to null.



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