[CAMEL-9359] DefaultExchangeHolder.marshal() logs NULL header values to WARN

• Type: Improvement
• Status: Resolved
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 2.16.1
• Fix Version/s: 2.16.2, 2.17.0
• Component/s: camel-core
• Estimated Complexity: Unknown
• Assignee: Claus Ibsen
• Reporter: Marco Zapletal
• Created: 24/Nov/15 18:13
• Updated: 25/Nov/15 13:33
• Resolved: 25/Nov/15 13:33

Description

As described on this post on the mailing list (http://camel.465427.n5.nabble.com/DefaultExchangeHolder-marshal-produces-a-lot-of-warnings-CAMEL-8415-td5773927.html) DefaultExchangeHolder.marshal() logs NULL header values to WARN (since Camel 2.16).
Some standard components such as camel-activemq, however, write a lot of headers being mostly NULL such as JMSDestination, JMSCorrelationID, etc.

Hence, I would suggest to change the log level from WARN to INFO in line https://github.com/apache/camel/blob/master/camel-core/src/main/java/org/apache/camel/impl/DefaultExchangeHolder.java#L358.