我无法在elasticsearch-2.2.0中安装插件，我尝试在多个服务器上安装。抛出相同的例外：无法在插件zip中找到插件描述符'plugin-descriptor.properties'
sudo bin/plugin install file:///usr/local/src/elasticsearch-2.2.0/elasticfence-2.2.0-SNAPSHOT.zip
-> Installing from file:/usr/local/src/elasticsearch-2.2.0/elasticfence-2.2.0-SNAPSHOT.zip...
Trying file:/usr/local/src/elasticsearch-2.2.0/elasticfence-2.2.0-SNAPSHOT.zip ...
Downloading .DONE
Verifying file:/usr/local/src/elasticsearch-2.2.0/elasticfence-2.2.0-SNAPSHOT.zip checksums if available ...
NOTE: Unable to verify checksum for downloaded plugin (unable to find .sha1 or .md5 file to verify)
ERROR: Could not find plugin descriptor 'plugin-descriptor.properties' in plugin zip
插件网址：https://github.com/elasticfence/elasticsearch-http-user-auth/tree/2.2.x/jar elasticsearch url：https://www.elastic.co/downloads/past-releases/elasticsearch-2-2-0