Solrをsunspotで起動しようとするとOperation not permittedになる #Solr

↓起動してほしい

$ bundle exec rake sunspot:solr:start
rake aborted!
Errno::EPERM: Operation not permitted
/Users/sakadon/.rbenv/versions/2.4.1/bin/bundle:22:in `load'
/Users/sakadon/.rbenv/versions/2.4.1/bin/bundle:22:in `<main>'
Tasks: TOP => sunspot:solr:start
(See full trace by running task with --trace)

↓PIDファイルには死んでもらう

$ rm solr/pids/development/sunspot-solr-development.pid

↓治る

$ bundle exec rake sunspot:solr:start
Successfully started Solr ...