[AMQ-7139] Illegal reflective access by com.thoughtworks.xstream.core.util.Fields

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 5.14.4
• Fix Version/s: 5.17.0
• Component/s: Broker
• Labels: close-pending
• Assignee: Matt Pavlovich
• Reporter: Abhi
• Created: 21/Jan/19 09:55
• Updated: 27/Sep/21 23:14
• Resolved: 27/Sep/21 23:14

Description

Hi,

After starting ActiveMQ broker with Java 11, I am seeing below illegal reflective access warnings from xstream. These will become errors in a future release and hence needs to be addressed. There is a github issue logged with xstream regarding this (https://github.com/x-stream/xstream/issues/101) but there doesn't seem to be a consensus on how this will be fixed.  Is there a workaround that we can put in ActiveMQ to avoid these warnings? I am not sure what is the right way to fix this for ActiveMQ -  move away from xstream as a long term fix?

Logs:

WARNING: An illegal reflective access operation has occurred

WARNING: Illegal reflective access by com.thoughtworks.xstream.core.util.Fields (file:/prod/tools/infra/apache/activemq/apache-activemq-5.14.4/lib/optional/xstream-1.4.9.jar) to field java.lang.reflect.Proxy.h

WARNING: Please consider reporting this to the maintainers of com.thoughtworks.xstream.core.util.Fields

WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations

WARNING: All illegal access operations will be denied in a future release