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https://issues.apache.org/jira/browse/HADOOP-13697?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15566232#comment-15566232
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Hudson commented on HADOOP-13697:
---------------------------------
SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #10587 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/10587/])
HADOOP-13697. LogLevel#main should not throw exception if no arguments.
(liuml07: rev 2fb392a587d288b628936ca6d18fabad04afc585)
* (edit)
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/log/LogLevel.java
> LogLevel#main throws exception if no arguments provided
> -------------------------------------------------------
>
> Key: HADOOP-13697
> URL: https://issues.apache.org/jira/browse/HADOOP-13697
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: 2.9.0
> Reporter: Mingliang Liu
> Assignee: Mingliang Liu
> Fix For: 2.9.0, 3.0.0-alpha2
>
> Attachments: HADOOP-13697.000.patch, HADOOP-13697.001.patch
>
>
> {code}
> root@b9ab37566005:/# hadoop daemonlog
> Usage: General options are:
> [-getlevel <host:port> <classname> [-protocol (http|https)]
> [-setlevel <host:port> <classname> <level> [-protocol (http|https)]
> Exception in thread "main" org.apache.hadoop.HadoopIllegalArgumentException:
> No arguments specified
> at org.apache.hadoop.log.LogLevel$CLI.parseArguments(LogLevel.java:138)
> at org.apache.hadoop.log.LogLevel$CLI.run(LogLevel.java:106)
> at org.apache.hadoop.log.LogLevel.main(LogLevel.java:70)
> {code}
> I think we can catch the exception in the main method, and dump a log error
> message instead of throw the stack which may frustrate users.
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