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Posted to mapreduce-issues@hadoop.apache.org by "Dick King (JIRA)" <ji...@apache.org> on 2010/08/04 02:16:17 UTC
[jira] Commented: (MAPREDUCE-1921) IOExceptions should contain the
filename of the broken input files
[ https://issues.apache.org/jira/browse/MAPREDUCE-1921?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12895096#action_12895096 ]
Dick King commented on MAPREDUCE-1921:
--------------------------------------
{{MapTask.java}}
When creating a new exception to re-throw, perhaps we should duplicate the original exception's type? I realize that there's a lot of code that doesn't do that, but swallowing this information feels wrong. Especially in the case of IO exceptions, I can envision a lot of code that wants to treat certain sub-exceptions a bit differently; some IO exceptions are the caller's fault but some represent oddities that happened in the file system.
Perhaps something like
{noformat}
throw (IOException)(ioe.getClass().getConstructor(String.class, ioe.getClass())
.newInstance("IO error ..." + ... , ioe));
{noformat}
?
This cliche should occur in two places; perhaps we should pull it out and put it in one of the utilities classes? Perhaps IO utilities, since the main use case where I can see people caring is the large variety of {{IOException}} s.
> IOExceptions should contain the filename of the broken input files
> ------------------------------------------------------------------
>
> Key: MAPREDUCE-1921
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1921
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Reporter: Krishna Ramachandran
> Assignee: Krishna Ramachandran
> Attachments: mapred-1921-1.patch, mapred-1921-3.patch, mapreduce-1921.patch
>
>
> If bzip or other decompression fails, the IOException does not contain the name of the broken file that caused the exception.
> It would be nice if such actions could be avoided in the future by having the name of the files that are broken spelled
> out in the exception.
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