extract Chinese attribute value issue

[platstar]

Hi Everyone

I found an issue for XML-plugin.
When I try to extract value from XML attribute by XPATH.
If the content includes the Chinese It will all be ??? symbol,
but it 's work on the message fields.

All file include the attachment file
Thanks to your help.

• Version: 5.5.2
• Operating System: Windows
  logstash-xml-filter.zip