Add exception handling for JRuby process

lib/ferrum/browser/jruby_process.rb

@@ -5,6 +5,8 @@
 module Ferrum
   class Browser
     class JrubyProcess < Process
+      RESCUED_ERRORS = [Errno::ESRCH, Errno::ECHILD, Errno::EBADF].freeze
+
       def start
         # Don't do anything as browser is already running as external process.
         return if ws_url
@@ -32,7 +34,11 @@ def start
             environment.merge! Hash(@xvfb&.to_env)
           end
 
-          @process = process_builder.start
+          @process = begin
+            process = process_builder.start
+            sleep @process_timeout
+            process
+          end
           @pid = @process.pid
 
           parse_ws_url(output_file, @process_timeout)

lib/ferrum/browser/process.rb

@@ -15,6 +15,7 @@ class Browser
     class Process
       KILL_TIMEOUT = 2
       WAIT_KILLED = 0.05
+      RESCUED_ERRORS = [Errno::ESRCH, Errno::ECHILD].freeze
 
       attr_reader :host, :port, :ws_url, :pid, :command,
                   :default_user_agent, :browser_version, :protocol_version,
@@ -44,7 +45,7 @@ def self.process_killer(pid)
               break
             end
           end
-        rescue Errno::ESRCH, Errno::ECHILD
+        rescue RESCUED_ERRORS
           # nop
         end
       end
@@ -180,7 +181,7 @@ def close_io(*ios)
         ios.each do |io|
           io.close unless io.closed?
         rescue IOError
-          raise unless Utils::Platform.jruby?
+          raise
         end
       end
     end

lib/ferrum/browser/web_socket.rb

@@ -38,7 +38,7 @@ def initialize(url, max_receive_size, logger)
 
               @driver.parse(data)
             end
-          rescue EOFError, Errno::ECONNRESET, Errno::EPIPE
+          rescue EOFError, Errno::ECONNRESET, Errno::EPIPE, Errno::EBADF, IOError
             @messages.close
           end
         end