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I tried to build my package with NiFi custom-processor using mvn clean package command and I got the following output:
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 3.794 s
[INFO] Finished at: 2021-05-17T14:33:42+02:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.8.1:testCompile
(groovy-tests) on project mycustom-processor: Execution groovy-tests of goal
org.apache.maven.plugins:maven-compiler-plugin:3.8.1:testCompile failed:
Plugin org.apache.maven.plugins:maven-compiler-plugin:3.8.1 or one of its dependencies
could not be resolved: Failed to collect dependencies at
org.apache.maven.plugins:maven-compiler-plugin:jar:3.8.1
-> org.codehaus.groovy:groovy-eclipse-batch:jar:2.5.4-01: Failed to read artifact descriptor for
org.codehaus.groovy:groovy-eclipse-batch:jar:2.5.4-01: Could not transfer artifact
org.codehaus.groovy:groovy-eclipse-batch:pom:2.5.4-01 from/to bintray
(https://dl.bintray.com/groovy/maven):
Access denied to: https://dl.bintray.com/groovy/maven/org/codehaus/groovy/groovy-eclipse-batch/2.5.4-01/groovy-eclipse-batch-2.5.4-01.pom,
ReasonPhrase: Forbidden. -> [Help 1]
[ERROR]
Does anybody know how to handle this issue related to the maven-compiler-plugin:3.8.1:testCompile, please ?
I use Apache NiFi version 1.13.2 and mvn install -DskipTests does not change anything.
847
FlowFiles are at the heart of NiFi and its flow-based design. A FlowFile is a data record, which consists of a pointer to its content (payload) and attributes to support the content, that is associated with one or more provenance events.
Output port only transfers the data from a process group to Outside processors(or) processor groups. Can you add an Processor Group and use these two processors inside Processor Group then you can enable transmission from Output port. Flow:- Inside the processor group keep all your processors.
Processor: The Processor is the NiFi component that is used to listen for incoming data; pull data from external sources; publish data to external sources; and route, transform, or extract information from FlowFiles. Relationship: Each Processor has zero or more Relationships defined for it.
Apache NiFi - Processors. Apache NiFi processors are the basic blocks of creating a data flow. Every processor has different functionality, which contributes to the creation of output flowfile. Dataflow shown in the image below is fetching file from one directory using GetFile processor and storing it in another directory using PutFile processor.
The easiest way to get started writing a custom processor is to use the Maven archetype included with NiFI. From a directory where you want to create your processor bundle, execute the following:
Apache NiFi is an open source platform and gives developers the options to add their custom processor in the NiFi library. Follow these steps to create a custom processor. Download Maven latest version from the link given below. Add an environment variable named M2_HOME and set value as the installation directory of maven.
At Hashmap, our engineering and consulting teams have developed a wide range of custom Apache NiFi processors and controller services for a variety of clients and business requirements — some generic and some very industry specific. A NiFi Processor is the basic building block for creating an Apache NiFi dataflow.
Add the below property to your pom.xml
<nifi.groovy.version>2.5.6</nifi.groovy.version>
The reason for this error is that the pom's url is not accessable.
Currently, groovy-eclipse-batch-2.5.4-01.pom link is forbidden.(dl.bintray.com/groovy/maven/org/codehaus/groovy/groovy-eclipse-batch/2.5.4-01/groovy-eclipse-batch-2.5.4-01.pom)
Check if groovy-eclipse-batch exists in your maven repository. Or just find a valid version on mvnrepository.com and use it. (https://mvnrepository.com/artifact/org.codehaus.groovy/groovy-eclipse-batch)
For example, change version of groovy-eclipse-batch to 2.5.6-01.
Try adding the following to your parent pom for the bundle project :
<build>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<encoding>UTF-8</encoding>
</configuration>
<dependencies>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-eclipse-batch</artifactId>
<version>2.5.6-01</version>
</dependency>
</dependencies>
</plugin>
</plugins>
</build>
Before add the dependency :
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.8.1:testCompile (groovy-tests) on project mytest: Execution groovy-tests of goal org.apache.maven.plugins:maven-compiler-plugin:3.8.1:testCompile failed: Plugin org.apache.maven.plugins:maven-compiler-plugin:3.8.1 or one of its dependencies could not be resolved: Failed to collect dependencies at org.apache.maven.plugins:maven-compiler-plugin:jar:3.8.1 -> org.codehaus.groovy:groovy-eclipse-batch:jar:2.5.4-01: Failed to read artifact descriptor for org.codehaus.groovy:groovy-eclipse-batch:jar:2.5.4-01: Could not transfer artifact org.codehaus.groovy:groovy-eclipse-batch:pom:2.5.4-01 from/to bintray (https://dl.bintray.com/groovy/maven): Access denied to: https://dl.bintray.com/groovy/maven/org/codehaus/groovy/groovy-eclipse-batch/2.5.4-01/groovy-eclipse-batch-2.5.4-01.pom -> [Help 1]
After add the dependency :
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary for mytest 1.0.0-SNAPSHOT:
[INFO]
[INFO] mytest ............................................. SUCCESS [ 3.611 s]
[INFO] nifi-mytestnar-processors .......................... SUCCESS [ 11.278 s]
[INFO] nifi-mytestnar-nar ................................. SUCCESS [ 0.983 s]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 19.448 s
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