https://community.cloudera.com/t5/Support-Questions/Drill-in-Nifi-DBCPConnectionPool-1-5-0-error-failed-to/m-p/222832#M184698 <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="77676-drill-1.png" style="width: 1141px;"><img src="https://community.cloudera.com/t5/image/serverpage/image-id/15652i469E2975BA173BF6/image-size/medium?v=v2&amp;px=400" role="button" title="77676-drill-1.png" alt="77676-drill-1.png" /></span></P><P>Hi,</P><P>I am trying to connect Apache Drill 1.13.0 from Apache NiFi 1.5.0 by DBCPConnectionPool 1.5.0</P><P>but I got error</P><P><STRONG>06:17:54 UTC</STRONG></P><P><STRONG>ERROR</STRONG></P><P><U>eec752d9-0163-1000-0000-0000293632ce</U></P><P><STRONG>%%%%%</STRONG></P><P>ExecuteSQL[id=eec752d9-0163-1000-0000-0000293632ce] ExecuteSQL[id=eec752d9-0163-1000-0000-0000293632ce] failed to process session due to java.lang.RuntimeException: java.lang.RuntimeException: java.lang.ClassNotFoundException: Class ${package.namespace.prefix}null not found: java.lang.RuntimeException: java.lang.ClassNotFoundException: Class ${package.namespace.prefix}null not found</P><P><STRONG>06:17:54 UTC</STRONG></P><P><STRONG>WARNING</STRONG></P><P><U>eec752d9-0163-1000-0000-0000293632ce</U></P><P><STRONG>%%%%</STRONG></P><P>ExecuteSQL[id=eec752d9-0163-1000-0000-0000293632ce] Processor Administratively Yielded for 1 sec due to processing failure</P><P>Thanks in advance,</P><P>Tom</P> Sun, 18 Aug 2019 02:01:46 GMT marynowskixtoma 2019-08-18T02:01:46Z