https://community.cloudera.com/t5/Support-Questions/Drill-in-Nifi-DBCPConnectionPool-1-5-0-error-failed-to/m-p/222835#M184701 <A rel="user" href="https://community.cloudera.com/users/83334/marynowskixtomasz.html" nodeid="83334">@Tommy</A><P> Please make sure that the jar file path is correct. If you are using a multi-node NiFi cluster, each node has to have the jar file at the specified path.</P> Wed, 20 Jun 2018 12:29:48 GMT kkawamura 2018-06-20T12:29:48Z