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https://issues.apache.org/jira/browse/HDFS-16710?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18036433#comment-18036433
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ASF GitHub Bot commented on HDFS-16710:
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github-actions[bot] closed pull request #4670: HDFS-16710. Remove redundant
throw exceptions in org.apache.hadoop.hdfs.server.namenode package
URL: https://github.com/apache/hadoop/pull/4670
> Remove redundant throw exceptions in org.apahce.hadoop.hdfs.server.namenode
> package
> -----------------------------------------------------------------------------------
>
> Key: HDFS-16710
> URL: https://issues.apache.org/jira/browse/HDFS-16710
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: ZanderXu
> Assignee: ZanderXu
> Priority: Major
> Labels: pull-request-available
> Time Spent: 1.5h
> Remaining Estimate: 0h
>
> When I read some class about HDFS NameNode, I found there are many redundant
> throw exception in org.apahce.hadoop.hdfs.server.namenode package, such as:
> {code:java}
> public synchronized void transitionToObserver(StateChangeRequestInfo req)
> throws ServiceFailedException, AccessControlException, IOException {
> checkNNStartup();
> nn.checkHaStateChange(req);
> nn.transitionToObserver();
> } {code}
> Because ServiceFailedException and AccessControlException is subClass of
> IOException, so I feel that ServiceFailedException and AccessControlException
> are redundant, so we can remove it to make code clearer, such as:
> {code:java}
> public synchronized void transitionToObserver(StateChangeRequestInfo req)
> throws IOException {
> checkNNStartup();
> nn.checkHaStateChange(req);
> nn.transitionToObserver();
> } {code}
>
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