Error while using NiFi flow to execute Impala: java.lang.ClassNotFoundException: com.cloudera.impala.jdbc.Driver
Hi Team,
We have the following issue, we are using nifi work flow, in which we are trying to execute impala, before implementing nifi execute script, we tested the script by using jython to test the feasibility of the connections we established is successful and able to get the count in impala, however when using the same connection configuration in nifi execute script processor, we get the java class path not found, the impala jdbc connection is placed in a customized location, impalajdbc41.jar file is not a nar, file, and the customized location is readable, as confirmed by the support and if placed in the nar file location will
Please find the logs for reference as an attachment.2025-09-29 15:31:08,495 ERROR org.apache.nifi.processors.script.ExecuteScript: ExecuteScript[id=49498cfb-70fc-1ebf-ffff-fffff0fa2dc8] Processing failed
org.apache.nifi.processor.exception.ProcessException: javax.script.ScriptException: java.lang.ClassNotFoundException: java.lang.ClassNotFoundException: com.cloude
ra.impala.jdbc.Driver in <script> at line number 22
at org.apache.nifi.processors.script.ExecuteScript.onTrigger(ExecuteScript.java:247)
at org.apache.nifi.controller.StandardProcessorNode.onTrigger(StandardProcessorNode.java:1361)
at org.apache.nifi.controller.tasks.ConnectableTask.invoke(ConnectableTask.java:247)
at org.apache.nifi.controller.scheduling.AbstractTimeBasedSchedulingAgent.lambda$doScheduleOnce$0(AbstractTimeBasedSchedulingAgent.java:59)
at org.apache.nifi.engine.FlowEngine$2.run(FlowEngine.java:110)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(Unknown Source)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: javax.script.ScriptException: java.lang.ClassNotFoundException: java.lang.ClassNotFoundException: com.cloudera.impala.jdbc.Driver in <script> at line n
umber 22
at org.python.jsr223.PyScriptEngine.scriptException(PyScriptEngine.java:222)
at org.python.jsr223.PyScriptEngine.eval(PyScriptEngine.java:59)
at org.python.jsr223.PyScriptEngine.access$300(PyScriptEngine.java:20)
at org.python.jsr223.PyScriptEngine$PyCompiledScript.eval(PyScriptEngine.java:250)
at javax.script.CompiledScript.eval(Unknown Source)
at org.apache.nifi.script.impl.JythonScriptRunner.run(JythonScriptRunner.java:63)
at org.apache.nifi.processors.script.ExecuteScript.onTrigger(ExecuteScript.java:230)
... 11 common frames omitted
Caused by: org.python.core.PyException: java.lang.ClassNotFoundException: java.lang.ClassNotFoundException: com.cloudera.impala.jdbc.Driver
at org.python.core.Py.JavaError(Py.java:545)
at org.python.core.Py.JavaError(Py.java:536)
