Jason Tedor 91cb563247 Provide helpful error message if a plugin exists ... Today if an older version of a plugin exists, we fail to notify the user with a helpful error message. This happens because during plugin verification, we attempt to read the plugin descriptors for all existing plugins. When an older version of a plugin is sitting on disk, we will attempt to read this old plugin descriptor and fail due to a version mismatch. This leads to an unhelpful error message. Instead, we should check for existence of the plugin as part of the verification phase, but before attempting to read plugin descriptors for existing plugins. This enables us to provide a helpful error message to the user. Relates #22305		2016-12-21 22:37:07 -05:00
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java/org/elasticsearch	Provide helpful error message if a plugin exists	2016-12-21 22:37:07 -05:00
resources/org/elasticsearch	Assert status logger does not warn on Log4j usage	2016-11-04 14:19:59 -04:00