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From "Deepak Narkhede (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (APEXMALHAR-2312) NullPointerException in FileSplitterInput only if the file path is specified for attribute <files> instead of directory path
Date Thu, 27 Oct 2016 09:16:58 GMT

    [ https://issues.apache.org/jira/browse/APEXMALHAR-2312?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15611295#comment-15611295
] 

Deepak Narkhede commented on APEXMALHAR-2312:
---------------------------------------------

Changed to Critical because some basic functionality is broken.

> NullPointerException in FileSplitterInput only if the file path is specified for attribute
<files> instead of directory path
> ----------------------------------------------------------------------------------------------------------------------------
>
>                 Key: APEXMALHAR-2312
>                 URL: https://issues.apache.org/jira/browse/APEXMALHAR-2312
>             Project: Apache Apex Malhar
>          Issue Type: Bug
>            Reporter: Deepak Narkhede
>            Assignee: Deepak Narkhede
>            Priority: Critical
>
> Problem Statement:
> ==================
> NullPointerException seen in FileSplitterInput only if the file path is specified for
attribute <files> instead of directory path.
> Description:
> ===========
> 1) TimeBasedDirectoryScanner threads part of scanservice tries to scan the directories/files.
> 2) Each thread checks with help of isIterationCompleted() [referenceTimes] method whether
scanned of last iteration are processed by operator thread.
> 3) Previously it used to work because HashMap (referenceTimes) used to return null even
if last scanned directory path is null.
> 4) Recently referenceTimes is changed to ConcurrentHashMap, so get() doesn't allow null
key's passed to ConcurrentHashMap get() method.
> 5) Hence NullPointerException is seen as if only file path is provided directory path
would be empty hence key would be empty.
> Solution:
> ========
> Pre-check that directory path is null then we have completed last iterations if only
filepath is provided.



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