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From "Andries Engelbrecht (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-2424) Ignore hidden files in directory path
Date Tue, 10 Mar 2015 23:32:39 GMT
Andries Engelbrecht created DRILL-2424:
------------------------------------------

             Summary: Ignore hidden files in directory path
                 Key: DRILL-2424
                 URL: https://issues.apache.org/jira/browse/DRILL-2424
             Project: Apache Drill
          Issue Type: Improvement
          Components: Storage - JSON, Storage - Text & CSV
    Affects Versions: 0.7.0
            Reporter: Andries Engelbrecht
            Assignee: Steven Phillips


When streaming data to the DFS some records can be incomplete during the temporary write phase
for the last file(s). These file typically have a different extension like '.tmp' or can be
marked hidden with a prefix of '.'  .

Querying the directory path will Drill will then cause a query error as some records may not
be complete in the temporary files. Having the ability to have Drill ignore hidden files and/or
to only read files of designated extension in the workspace will resolve this problem.

Example is using Flume to stream JSON files to a directory structure, the HDFS sink creates
.tmp files (can be hidden with . prefix) that contains incomplete JSON objects till the file
is closed and the .tmp extension (or prefix) is removed. Attempting to query the directory
structure with Drill then results in errors due to the incomplete JSON object(s) in the tmp
files.



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