apache nifi Stateless - not able to set parm of controller service (DBCPConnectionPool 1.10.0) - apache-nifi

Question

I am following the NiFi 1.10 stateless guildeline to create a simple process group of executing a sql in mysql db. I have put necessary parm of db controller service to parameter context.
it works well in nifi canvas. Then i add it to registry and prepare a json parm file: stateless-simpledb.json
{
"registryUrl": "http://localhost:18080",
"bucketId": "cac8f127-e328-45c1-a4cb-0e03dc837ceb",
"flowId": "cc2753f2-78f3-4449-a2fd-343dfeaafe15",
"flowVersion": "3",
"parameters": {
"lastIngestId" : "20000",
"mysql-jdbc-driver-name" : "com.mysql.jdbc.Driver",
"db-user" : "root",
"db-password" : "password",
"db-con-url" : "jdbc:mysql://localhost:3306/mms",
"jdbc-jar-path" : "/program/jdbc/mysql-connector-java.jar"
}
}
and run the one-off command:
/program/nifi/bin/nifi.sh stateless RunFromRegistry Once --file /app/poc/nifi-stateless/conf/stateless-simpledb.json
It raise error:
=== FlowFileRepository Type ===
org.apache.nifi.controller.repository.RocksDBFlowFileRepository
org.apache.nifi:nifi-framework-nar:1.10.0 || /program/nifi-1.10.0/work/stateless-nars/nifi-framework-nar-1.10.0.nar-unpacked
org.apache.nifi.controller.repository.WriteAheadFlowFileRepository
org.apache.nifi:nifi-framework-nar:1.10.0 || /program/nifi-1.10.0/work/stateless-nars/nifi-framework-nar-1.10.0.nar-unpacked
org.apache.nifi.controller.repository.VolatileFlowFileRepository
org.apache.nifi:nifi-framework-nar:1.10.0 || /program/nifi-1.10.0/work/stateless-nars/nifi-framework-nar-1.10.0.nar-unpacked
=== End FlowFileRepository types ===
23:32:32.626 [main] INFO org.apache.nifi.stateless.bootstrap.ExtensionDiscovery - Successfully discovered extensions in 4411 milliseconds
23:32:32.633 [main] DEBUG org.apache.nifi.stateless.core.ComponentFactory - Setting context class loader to org.apache.nifi.nar.InstanceClassLoader#50fa5938 (parent = org.apache.nifi.nar.NarClassLoader[/program/nifi-1.10.0/work/stateless-nars/nifi-dbcp-service-nar-1.10.0.nar-unpacked]) to create org.apache.nifi.dbcp.DBCPConnectionPool
23:32:32.647 [main] DEBUG org.apache.nifi.parameter.ExpressionLanguageAwareParameterParser - For input #{jdbc-jar-path} found 1 Parameter references: [org.apache.nifi.parameter.StandardParameterReference#2d3eecda]
23:32:32.650 [main] DEBUG org.apache.nifi.parameter.ExpressionLanguageAwareParameterParser - For input /program/jdbc/mysql-connector-java.jar found 0 Parameter references: []
23:32:32.651 [main] DEBUG org.apache.nifi.parameter.ExpressionLanguageAwareParameterParser - For input 500 millis found 0 Parameter references: []
23:32:32.651 [main] DEBUG org.apache.nifi.parameter.ExpressionLanguageAwareParameterParser - For input 8 found 0 Parameter references: []
23:32:32.651 [main] DEBUG org.apache.nifi.parameter.ExpressionLanguageAwareParameterParser - For input 0 found 0 Parameter references: []
23:32:32.651 [main] DEBUG org.apache.nifi.parameter.ExpressionLanguageAwareParameterParser - For input 8 found 0 Parameter references: []
23:32:32.651 [main] DEBUG org.apache.nifi.parameter.ExpressionLanguageAwareParameterParser - For input -1 found 0 Parameter references: []
23:32:32.651 [main] DEBUG org.apache.nifi.parameter.ExpressionLanguageAwareParameterParser - For input -1 found 0 Parameter references: []
23:32:32.651 [main] DEBUG org.apache.nifi.parameter.ExpressionLanguageAwareParameterParser - For input 30 mins found 0 Parameter references: []
23:32:32.651 [main] DEBUG org.apache.nifi.parameter.ExpressionLanguageAwareParameterParser - For input -1 found 0 Parameter references: []
Exception in thread "main" java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.nifi.bootstrap.RunStatelessNiFi.main(RunStatelessNiFi.java:69)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.nifi.StatelessNiFi.main(StatelessNiFi.java:103)
... 5 more
Caused by: java.lang.RuntimeException: Failed to enable Controller Service {id=691ecc97-ff46-3a5e-8aad-37dc568bc247, name=MYSQL-MMS-stateless-test, type=class org.apache.nifi.dbcp.DBCPConnectionPool} because validation failed: ['Database Connection URL' is invalid because Database Connection URL is required, 'Database Driver Class Name' is invalid because Database Driver Class Name is required]
at org.apache.nifi.stateless.core.StatelessControllerServiceLookup.enableControllerServices(StatelessControllerServiceLookup.java:133)
at org.apache.nifi.stateless.core.StatelessFlow.<init>(StatelessFlow.java:153)
at org.apache.nifi.stateless.core.StatelessFlow.createAndEnqueueFromJSON(StatelessFlow.java:469)
at org.apache.nifi.stateless.runtimes.Program.runLocal(Program.java:133)
at org.apache.nifi.stateless.runtimes.Program.launch(Program.java:67)
... 10 more
Seems the apache nifi stateless function failed to set controller service even it's in "process group" scope.
Would anyone has any advice?

Answer 1

As mentioned in the comments, this appears to be a known problem with the validation of controller services.
This can be avoided by using Nifi 1.12 and above as it got fixed in the following jira: https://issues.apache.org/jira/plugins/servlet/mobile#issue/NIFI-7380
Though I am not entirely sure of this, it may also be possible that this simply indicates that your controller service is not configured correctly. This would be worth double checking.