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https://issues.apache.org/jira/browse/NIFI-6336?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16993125#comment-16993125
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M Tien commented on NIFI-6336:
------------------------------
With this example, tried to replicate the error and found that 0 is a valid
port, according to Java InetSocketAddress documentation.
"A valid port value is between 0 and 65535. A port number of {{zero}} will let
the system pick up an ephemeral port in a {{bind}} operation."
[https://docs.oracle.com/javase/7/docs/api/java/net/InetSocketAddress.html]
>From NiFi's perspective, it only allows ports 1-65535. But NiFi properties are
>looked at too late and are unable to catch invalid port numbers. Therefore, if
>0 is not a valid port for NiFi, then it needs to be explicitly handled.
> Improve startup error messages in log
> -------------------------------------
>
> Key: NIFI-6336
> URL: https://issues.apache.org/jira/browse/NIFI-6336
> Project: Apache NiFi
> Issue Type: Improvement
> Components: Configuration, Core Framework
> Affects Versions: 1.9.2
> Reporter: Andy LoPresto
> Assignee: M Tien
> Priority: Major
> Labels: configuration, error, log, troubleshooting
>
> We frequently have users who encounter startup errors due to configuration
> but can't understand the error messages to resolve the issues on their own.
> Improving the specific error messages, and providing context around them,
> would help users diagnose their own issues and supporters/community members
> offer better, more targeted solutions-oriented advice rather than having to
> ask investigatory questions and wait for synchronous conversations.
> Example issue where one of the ports (not clear from error messages) isn't
> specified in a cluster {{nifi.properties}} configuration file so the
> application fails to start up (happened during 1.7.1 to 1.9.2 migration).
> {code}
> Caused by: org.springframework.beans.factory.BeanCreationException: Error
> creating bean with name 'flowService': FactoryBean threw exception on object
> creation; nested exception is
> org.springframework.beans.factory.BeanCreationException: Error creating bean
> with name 'flowController' defined in class path resource [nifi-context.xml]:
> Cannot resolve reference to bean 'clusterCoordinator' while setting bean
> property 'clusterCoordinator'; nested exception is
> org.springframework.beans.factory.BeanCreationException: Error creating bean
> with name 'clusterCoordinator': FactoryBean threw exception on object
> creation; nested exception is java.lang.IllegalArgumentException: Port must
> be inclusively in the range [1, 65535]. Port given: 0
> {code}
> At least including the {{nifi.properties}} property/key in this error would
> make the issue and solution much clearer.
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