JRUBY run HP UNIX has issue a problem

when I run logstash (apache 2.0),then as log:
NotImplementedError: stat.st_dev unsupported or native support failed to load
dev_major at org/jruby/RubyFileStat.java:388
_discover_file at file:/data03/AIS_HOME/framecs/logstash/logstash-1.1.0-monolithic.jar!/gems/filewatch-0.3.2/lib/filewatch/watch.rb:133
each at org/jruby/RubyArray.java:1612
_discover_file at file:/data03/AIS_HOME/framecs/logstash/logstash-1.1.0-monolithic.jar!/gems/filewatch-0.3.2/lib/filewatch/watch.rb:115
watch at file:/data03/AIS_HOME/framecs/logstash/logstash-1.1.0-monolithic.jar!/gems/filewatch-0.3.2/lib/filewatch/watch.rb:34
tail at file:/data03/AIS_HOME/framecs/logstash/logstash-1.1.0-monolithic.jar!/gems/filewatch-0.3.2/lib/filewatch/tail.rb:49
run at file:/data03/AIS_HOME/framecs/logstash/logstash-1.1.0-monolithic.jar!/logstash/inputs/file.rb:66
each at org/jruby/RubyArray.java:1612
run at file:/data03/AIS_HOME/framecs/logstash/logstash-1.1.0-monolithic.jar!/logstash/inputs/file.rb:66
run_input at file:/data03/AIS_HOME/framecs/logstash/logstash-1.1.0-monolithic.jar!/logstash/agent.rb:631
start_input at file:/data03/AIS_HOME/framecs/logstash/logstash-1.1.0-monolithic.jar!/logstash/agent.rb:322
Exception in thread "LogStash::Agent" org.jruby.exceptions.RaiseException: (SystemExit) stat.st_dev unsupported or native support failed to load
at org.jruby.RubyThread.join(org/jruby/RubyThread.java:509)
at LogStash::Agent.wait(file:/data03/AIS_HOME/framecs/logstash/logstash-1.1.0-monolithic.jar!/logstash/agent.rb:312)
at logstash.runner.main(logstash/runner.rb:40)
at org.jruby.RubyArray.each(org/jruby/RubyArray.java:1612)
at logstash.runner.main(logstash/runner.rb:40)
at logstash.runner.(root)(logstash/runner.rb:108)
how jruby support hp ux at the extent? or should i build a native lib for hp and how ?