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    Bug 
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    Resolution: Done
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    Major 
- 
    14.0.0.Beta2, 17.0.0.Final
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    None
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        Workaround Exists
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        Regression
Following should add simple load provider with factor=0:
/subsystem=modcluster/mod-cluster-config=configuration/:write-attribute(name=simple-load-provider, value=0)
Instead, this error shows up:
{
    "outcome" => "failed",
    "failure-description" => "WFLYCTL0216: Management resource '[
    (\"subsystem\" => \"modcluster\"),
    (\"proxy\" => \"default\"),
    (\"load-provider\" => \"simple\")
]' not found",
    "rolled-back" => true
}
There is missing translation to create the resource, same is the situation for undefine operation.