[jira] [Created] (LUCENE-5465) Solr Contrib "map-reduce" breaks Manifest of all other JAR files by adding a broken Main-Class attribute

["Uwe Schindler (JIRA)" <ji...@apache.org>]

Uwe Schindler created LUCENE-5465:
-------------------------------------

             Summary: Solr Contrib "map-reduce" breaks Manifest of all other JAR files by adding a broken Main-Class attribute
                 Key: LUCENE-5465
                 URL: https://issues.apache.org/jira/browse/LUCENE-5465
             Project: Lucene - Core
          Issue Type: Bug
    Affects Versions: 4.7
            Reporter: Uwe Schindler
            Assignee: Uwe Schindler


The addition of the Solr map-reduce contrib created a new "main.class" property, which is used by the jarify task. Currently only the map-reduce plugin actually set this property, soall other generated JAR files contain the following line:

{{Main-Class: $\{main.class\}}}

This happens because the ANT property "main.class" is undefined for most modules. Maybe this was added for one of the modules (I assume that the Solr-Morphline JARs use this attribute?). We should add some if/then/else structure to the {{<jarify/>}} task that only sets this property, if it is actually defined. Otherwise remove it (I think ANT does this automatically if its empty, means string-empty, have to try out)

This leads to an error if the file is double-clicked or started via {{java -jar}}:

{noformat}
C:\Users\Uwe Schindler\Desktop>java -jar lucene-core-4.7.0.jar
Fehler: Hauptklasse ${main.class} konnte nicht gefunden oder geladen werden
{noformat}



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