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As a first improvement toward bug #335710, we need to be able to detect is the project configuration is up-to-date or not, and show a warning or some sort of marker. Ideally a quickfix should be associated with it.
Implemented. m2e will add error markers to indicate that workspace project configuration and pom.xml are out of sync. Default implementation compares lifecycle mapping metadata and configuration of interesting mojo executions to determine if project configuration requires update or not. Although I expect the default behaviour to be good enough in vast majority of cases, m2e extensions can provide alternative configuration comparison logic both at ILifecycleMapping and AbstractProjectConfigurator layer.
To be more specific, m2e expects Xpp3Dom to be serializable and this has been added in plexus-utils 2.0.6-SNAPSHOT
I have seen this when changing
Moved to https://github.com/eclipse-m2e/m2e-core/issues/