Why is there no HBaseReadStreamExample in the Flink-HBase connector?
There seems to be a Read, Write, and WriteStream example, but no ReadStream.
Is stream reading from HBase into Flink a bad practice?
This is a fairly common limitation when it comes to connecting databases to stream processors. On the one hand, it is straightforward to implement writing a stream to a database. This might simply involve a series of INSERTs, or UPSERTS, for example. On the other hand, implementing a general purpose stream reader for a database involves ingesting the database's change data capture stream, which is much more complex to implement.
Note that the HBase connector will support being used as a lookup source in Flink 1.11.
Also note that better integration between HBase and Flink is planned, for example, see FLIP-117.