Github user greghogan commented on the issue:
https://github.com/apache/flink/pull/3711
Would it be better to replace the outer if-statement (line 312) with the
test for the presence of `hbase`? And to log a message that `HBASE_CONF_DIR` is
defined but `hbase` was not found so no HBase jars are included on the
classpath?
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