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https://issues.apache.org/jira/browse/HADOOP-13824?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15736691#comment-15736691
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Hudson commented on HADOOP-13824:
---------------------------------
SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #10978 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/10978/])
HADOOP-13824. FsShell can suppress the real error if no error message is
(weichiu: rev b606e025f10daed18b90b45ac00cd0c82e818581)
* (edit)
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FsShell.java
* (edit)
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestFsShell.java
* (edit)
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/test/GenericTestUtils.java
> FsShell can suppress the real error if no error message is present
> ------------------------------------------------------------------
>
> Key: HADOOP-13824
> URL: https://issues.apache.org/jira/browse/HADOOP-13824
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs
> Affects Versions: 2.7.1, 2.7.3
> Reporter: Rob Vesse
> Assignee: John Zhuge
> Labels: supportability
> Attachments: HADOOP-13824.001.patch, HADOOP-13824.002.patch,
> HADOOP-13824.003.patch
>
>
> The {{FsShell}} error handling assumes in {{displayError()}} that the
> {{message}} argument is not {{null}}. However in the case where it is this
> leads to a NPE which results in suppressing the actual error information
> since a higher level of error handling kicks in and just dumps the stack
> trace of the NPE instead.
> e.g.
> {noformat}
> Exception in thread "main" java.lang.NullPointerException
> at org.apache.hadoop.fs.FsShell.displayError(FsShell.java:304)
> at org.apache.hadoop.fs.FsShell.run(FsShell.java:289)
> at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
> at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:84)
> at org.apache.hadoop.fs.FsShell.main(FsShell.java:340)
> {noformat}
> This is deeply unhelpful because depending on what the underlying error was
> there may be no stack dumped/logged for it (as HADOOP-7114 provides) since
> {{FsShell}} doesn't explicitly dump traces for {{IllegalArgumentException}}
> which appears to be the underlying cause of my issue. Line 289 is where
> {{displayError()}} is called for {{IllegalArgumentException}} handling and
> that catch clause does not log the error.
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