Whenever reloading the portal-fw samples-fw sitemap. I'm seeing the
following NullPointerException:

java.lang.NullPointerException
        at
org.apache.cocoon.components.ExtendedComponentSelector.release(ExtendedC
omponentSelector.java:317)
        at
org.apache.cocoon.components.treeprocessor.sitemap.SelectNode.dispose(Se
lectNode.java:169)
        at
org.apache.cocoon.components.treeprocessor.TreeProcessor.disposeTree(Tre
eProcessor.java:472)
        at
org.apache.cocoon.components.treeprocessor.TreeProcessor.setupRootNode(T
reeProcessor.java:422)
        at
org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreePro
cessor.java:319)
        at
org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreePro
cessor.java:307)
        at
org.apache.cocoon.components.treeprocessor.sitemap.MountNode.invoke(Moun
tNode.java:133)
        at
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.
invokeNodes(AbstractParentProcessingNode.java:84)
        at
org.apache.cocoon.components.treeprocessor.sitemap.PreparableMatchNode.i
nvoke(PreparableMatchNode.java:164)
        at
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.
invokeNodes(AbstractParentProcessingNode.java:108)
        at
org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(P
ipelineNode.java:164)
        at
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.
invokeNodes(AbstractParentProcessingNode.java:108)
        at
org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(
PipelinesNode.java:161)
        at
org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreePro
cessor.java:325)
        at
org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreePro
cessor.java:307)
        at
org.apache.cocoon.components.treeprocessor.sitemap.MountNode.invoke(Moun
tNode.java:133)
        at
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.
invokeNodes(AbstractParentProcessingNode.java:84)
        at
org.apache.cocoon.components.treeprocessor.sitemap.PreparableMatchNode.i
nvoke(PreparableMatchNode.java:164)
        at
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.
invokeNodes(AbstractParentProcessingNode.java:108)
        at
org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(P
ipelineNode.java:164)
        at
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.
invokeNodes(AbstractParentProcessingNode.java:108)
        at
org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(
PipelinesNode.java:161)
        at
org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreePro
cessor.java:325)
        at
org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreePro
cessor.java:307)
        at org.apache.cocoon.Cocoon.process(Cocoon.java:621)

Would an additional null check suffice or is this a symptom of a
different problem?

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