[CAMEL-14853] camel-jacksonxml classpath conflict

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.1.0
• Fix Version/s: 3.3.0
• Component/s: camel-jacksonxml
• Estimated Complexity: Unknown
• Assignee: Andrea Cosentino
• Reporter: Maarten Tutak
• Created: 06/Apr/20 16:54
• Updated: 07/Apr/20 07:20
• Resolved: 07/Apr/20 07:20

Description

Hi. I'm using Spring Boot (2.2.4.RELEASE) with Camel (3.1.0) and I've come across the following error. I should note that i'm having a hard time reproducing this issue.

***************************
APPLICATION FAILED TO START
***************************

Description:

An attempt was made to call a method that does not exist. The attempt was made from the following location:

    com.ctc.wstx.evt.CompactStartElement.getAttributes(CompactStartElement.java:94)

The following method did not exist:

    'org.codehaus.stax2.ri.EmptyIterator org.codehaus.stax2.ri.EmptyIterator.getInstance()'

The method's class, org.codehaus.stax2.ri.EmptyIterator, is available from the following locations:

    jar:file:/app/libs/stax2-api-4.2.jar!/org/codehaus/stax2/ri/EmptyIterator.class

It was loaded from the following location:

    file:/app/libs/stax2-api-4.2.jar


Action:

Correct the classpath of your application so that it contains a single, compatible version of org.codehaus.stax2.ri.EmptyIterator

I was wondering if this is related to the fact that camel-jacksonxml introduces both org.codehaus.woodstox:woodstox-core-asl:jar:4.4.1 and com.fasterxml.woodstox:woodstox-core:jar:6.0.3 on the classpath , as seen below.

INFO] +- org.apache.camel.springboot:camel-jacksonxml-starter:jar:3.1.0:compile
[INFO] |  \- org.apache.camel:camel-jacksonxml:jar:3.1.0:compile
[INFO] |     +- org.apache.camel:camel-support:jar:3.1.0:compile
[INFO] |     +- com.fasterxml.jackson.dataformat:jackson-dataformat-xml:jar:2.10.2:compile
[INFO] |     |  +- org.codehaus.woodstox:stax2-api:jar:4.2:compile
[INFO] |     |  \- com.fasterxml.woodstox:woodstox-core:jar:6.0.3:compile
[INFO] |     +- com.fasterxml.jackson.module:jackson-module-jaxb-annotations:jar:2.10.2:compile
[INFO] |     \- org.codehaus.woodstox:woodstox-core-asl:jar:4.4.1:compile

It's unclear to me why camel-jacksonxml has a dependency on woodstox-core-asl while woodstox-core is already available, albeit transitively.