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From "Amar Kamat (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-4190) Changes to JobHistory makes it backward incompatible
Date Fri, 26 Sep 2008 03:29:44 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-4190?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12634739#action_12634739
] 

Amar Kamat commented on HADOOP-4190:
------------------------------------

The findbugs warning is because of the {{IOException}} which the parser ignores while it tries
to close the stream. Not something that I have introduced. Here is a section from the patch
that explains the warning
{code}
-      }
+      } while ((line = reader.readLine())!= null);
     } finally {
       try { reader.close(); } catch (IOException ex) {}
{code}

> Changes to JobHistory makes it backward incompatible
> ----------------------------------------------------
>
>                 Key: HADOOP-4190
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4190
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: mapred
>            Reporter: Amar Kamat
>            Assignee: Amar Kamat
>            Priority: Blocker
>             Fix For: 0.19.0
>
>         Attachments: HADOOP-4190-v3.patch, HADOOP-4190-v4.patch, HADOOP-4190-v5.patch,
HADOOP-4190-v6.patch
>
>
> With HADOOP-3245, the job history format has changed. Every log line now ends with a
'.' (dot). JobHistory's parser will consider a history line valid only if it ends in a dot
> Hence the new parser wont be able to parse old history files.

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