FlowConnector will sometimes fail when
attempting to plan a
Flow. If the error message
PlannerException is vague, use the
PlannerException.writeDOT() to export a
representation of the internal pipe assembly. DOT files can be opened by
GraphViz and OmniGraffle. These plans are only partial, but you will be
able to see where the Cascading planner failed.
Note that you can also create a DOT file from a
Flow, by using
See Debugging Hadoop.
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