logstash 安装WARNING: SSLSocket#session= is not supported

logstash官方提供的插件安装方法是：bin/plugin install logstash-output-webhdfs按照此方法，不出意料肯定会出现以下错误：[ec2-user@ip-xxx-xxx-xxx-xxx logstash-2.3.0]$ bin/plugin install --no-verify logstash-output-webhdfsThe use of bin/plugin is deprecated and will be removed in a feature release. Please use bin/logstash-plugin.Installing logstash-output-webhdfsError Bundler::InstallError, retrying 1/10An error occurred while installing snappy (0.0.12), and Bundler cannot continue.Make sure that `gem install snappy -v '0.0.12'` succeeds before bundling.WARNING: SSLSocket#session= is not supportedWARNING: SSLSocket#session= is not supportedWARNING: SSLSocket#session= is not supported原因是：GFW墙掉了logstash的默认gem source(类似于CentOS的yum source)；[ec2-user@ip-xxx-xxx-xxx-xxx logstash-2.3.0]$ cat Gemfile | grep sourcesource "https://rubygems.org"需要将gem source修改为国内的源，[ec2-user@ip-xxx-xxx-xxx-xxx logstash-2.3.0]$ vim Gemfile# This is a Logstash generated Gemfile.# If you modify this file manually all comments and formatting will be lost.#source "https://rubygems.org"source "https://ruby.taobao.org/"......执行