Trivial Description
There is Impala doc information that doesn't explicitly reference Cloudera but still might not be entirely generic. In particular, some advice about performance and scalability (things like calculating number of nodes to devote to Impala in a cluster) may reflect CDH-specific assumptions.
This work item is to evaluate on a case-by-case basis whether claims or advice are not applicable to the core Apache Impala, and revise if so. I'll mark it as lower-than-usual priority because this type of thing is more subtle than explicit references to vendor or product names.