Logstash http(s) output cert related error

Exception in thread "[main]>worker2" java.security.spec.InvalidKeySpecException: java.security.InvalidKeyException: IOException : algid parse error, not a sequence
    at sun.security.rsa.RSAKeyFactory.engineGeneratePrivate(sun/security/rsa/RSAKeyFactory.java:217)
    at java.security.KeyFactory.generatePrivate(java/security/KeyFactory.java:372)
    at java.lang.reflect.Method.invoke(java/lang/reflect/Method.java:606)
    at RUBY.setup_key_store(/opt/logstash/default/vendor/bundle/jruby/1.9/gems/manticore-0.6.0-java/lib/manticore/client.rb:647)
    at org.jruby.RubyArray.each(org/jruby/RubyArray.java:1613)
    at RUBY.setup_key_store(/opt/logstash/default/vendor/bundle/jruby/1.9/gems/manticore-0.6.0-java/lib/manticore/client.rb:642)
    at org.jruby.RubyIO.open(org/jruby/RubyIO.java:1201)
    at org.jruby.RubyKernel.open(org/jruby/RubyKernel.java:325)
    at RUBY.setup_key_store(/opt/logstash/default/vendor/bundle/jruby/1.9/gems/manticore-0.6.0-java/lib/manticore/client.rb:640)
    at RUBY.ssl_socket_factory_from_options(/opt/logstash/default/vendor/bundle/jruby/1.9/gems/manticore-0.6.0-java/lib/manticore/client.rb:603)
    at RUBY.pool_builder(/opt/logstash/default/vendor/bundle/jruby/1.9/gems/manticore-0.6.0-java/lib/manticore/client.rb:394)
    at RUBY.pool(/opt/logstash/default/vendor/bundle/jruby/1.9/gems/manticore-0.6.0-java/lib/manticore/client.rb:402)
    at RUBY.initialize(/opt/logstash/default/vendor/bundle/jruby/1.9/gems/manticore-0.6.0-java/lib/manticore/client.rb:208)
    at RUBY.make_client(/opt/logstash/default/vendor/bundle/jruby/1.9/gems/logstash-mixin-http_client-2.2.4/lib/logstash/plugin_mixins/http_client.rb:163)
    at RUBY.client(/opt/logstash/default/vendor/bundle/jruby/1.9/gems/logstash-mixin-http_client-2.2.4/lib/logstash/plugin_mixins/http_client.rb:168)
    at RUBY.receive(/opt/logstash/default/vendor/bundle/jruby/1.9/gems/logstash-output-http-2.1.3/lib/logstash/outputs/http.rb:117)
    at RUBY.multi_receive(/opt/logstash/default/vendor/bundle/jruby/1.9/gems/logstash-output-http-2.1.3/lib/logstash/outputs/http.rb:93)
    at org.jruby.RubyArray.each(org/jruby/RubyArray.java:1613)
    at RUBY.multi_receive(/opt/logstash/default/vendor/bundle/jruby/1.9/gems/logstash-output-http-2.1.3/lib/logstash/outputs/http.rb:93)
    at RUBY.worker_multi_receive(/opt/logstash/default/vendor/bundle/jruby/1.9/gems/logstash-core-2.4.0-java/lib/logstash/output_delegator.rb:130)
    at RUBY.multi_receive(/opt/logstash/default/vendor/bundle/jruby/1.9/gems/logstash-core-2.4.0-java/lib/logstash/output_delegator.rb:114)
    at RUBY.output_batch(/opt/logstash/default/vendor/bundle/jruby/1.9/gems/logstash-core-2.4.0-java/lib/logstash/pipeline.rb:301)
    at org.jruby.RubyHash.each(org/jruby/RubyHash.java:1342)
    at RUBY.output_batch(/opt/logstash/default/vendor/bundle/jruby/1.9/gems/logstash-core-2.4.0-java/lib/logstash/pipeline.rb:301)
    at RUBY.worker_loop(/opt/logstash/default/vendor/bundle/jruby/1.9/gems/logstash-core-2.4.0-java/lib/logstash/pipeline.rb:232)
    at RUBY.start_workers(/opt/logstash/default/vendor/bundle/jruby/1.9/gems/logstash-core-2.4.0-java/lib/logstash/pipeline.rb:201)
    at java.lang.Thread.run(java/lang/Thread.java:745)
Caused by: java.security.InvalidKeyException: IOException : algid parse error, not a sequence
    at sun.security.pkcs.PKCS8Key.decode(PKCS8Key.java:350)
    at sun.security.pkcs.PKCS8Key.decode(PKCS8Key.java:356)
    at sun.security.rsa.RSAPrivateCrtKeyImpl.<init>(RSAPrivateCrtKeyImpl.java:91)
    at sun.security.rsa.RSAPrivateCrtKeyImpl.newKey(RSAPrivateCrtKeyImpl.java:75)