我正在设置一个包含 3 个节点的 NiFi 1.7.1 版本构建集群。我正在使用 3 个其他节点作为 Zookeeper（不使用嵌入式 zk）使用 Java 1.8 build 181
使用外部zookeeper在集群模式下启动Nifi时出现此错误
Nifi-bootstrap.log
2018-08-21 19:58:49,675 INFO [main] org.apache.nifi.bootstrap.Command Launched Apache NiFi with Process ID 14956
2018-08-21 19:58:50,156 INFO [NiFi Bootstrap Command Listener] org.apache.nifi.bootstrap.RunNiFi Apache NiFi now running and listening for Bootstrap requests on port 44710
2018-08-21 19:59:09,700 ERROR [NiFi logging handler] org.apache.nifi.StdErr Failed to start web server: Unable to start Flow Controller.
2018-08-21 19:59:09,701 ERROR [NiFi logging handler] org.apache.nifi.StdErr Shutting down...
2018-08-21 19:59:10,679 INFO [main] org.apache.nifi.bootstrap.RunNiFi NiFi never started. Will not restart NiFi
Nifi-App.log
2018-08-21 19:59:09,222 WARN [main] org.eclipse.jetty.webapp.WebAppContext Failed startup of context o.e.j.w.WebAppContext@7115d5af{/nifi-api,file:///opt/nifi-1.7.1/work/jetty/nifi-web-api-1.7.1.war/webapp/,UNAVAILABLE}{./work/nar/framework/nifi-framework-nar-1.7.1.nar-unpacked/META-INF/bundled-dependencies/nifi-web-api-1.7.1.war}
org.apache.nifi.web.NiFiCoreException: Unable to start Flow Controller.
at org.apache.nifi.web.contextlistener.ApplicationStartupContextListener.contextInitialized(ApplicationStartupContextListener.java:88)
at org.eclipse.jetty.server.handler.ContextHandler.callContextInitialized(ContextHandler.java:876)
at org.eclipse.jetty.servlet.ServletContextHandler.callContextInitialized(ServletContextHandler.java:532)
at org.eclipse.jetty.server.handler.ContextHandler.startContext(ContextHandler.java:839)
at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:344)
at org.eclipse.jetty.webapp.WebAppContext.startWebapp(WebAppContext.java:1480)
at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1442)
at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:799)
at org.eclipse.jetty.servlet.ServletContextHandler.doStart(ServletContextHandler.java:261)
at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:540)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:131)
at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:113)
at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:113)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:131)
at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:105)
at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:113)
at org.eclipse.jetty.server.handler.gzip.GzipHandler.doStart(GzipHandler.java:290)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:131)
at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:113)
at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:113)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:131)
at org.eclipse.jetty.server.Server.start(Server.java:452)
at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:105)
at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:113)
at org.eclipse.jetty.server.Server.doStart(Server.java:419)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
at org.apache.nifi.web.server.JettyServer.start(JettyServer.java:838)
at org.apache.nifi.NiFi.<init>(NiFi.java:157)
at org.apache.nifi.NiFi.<init>(NiFi.java:71)
at org.apache.nifi.NiFi.main(NiFi.java:292)
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 org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'clusterCoordinationProtocolSenderListener' defined in class path resource [nifi-cluster-protocol-context.xml]: Cannot resolve reference to bean 'protocolListener' while setting constructor argument; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'protocolListener' defined in class path resource [nifi-cluster-protocol-context.xml]: Unsatisfied dependency expressed through constructor parameter 1: Could not convert argument value of type [null] to required type [int]: Failed to convert value of type 'null' to required type 'int'; nested exception is java.lang.IllegalArgumentException: Cannot convert value of type 'null' to required type 'int': PropertyEditor [org.springframework.beans.propertyeditors.CustomNumberEditor] returned inappropriate value of type 'null'
at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:175)
at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:103)
at org.springframework.beans.factory.support.AbstractBeanFactory.getObjectForBeanInstance(AbstractBeanFactory.java:1634)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:317)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1084)
at org.apache.nifi.web.contextlistener.ApplicationStartupContextListener.contextInitialized(ApplicationStartupContextListener.java:55)
... 33 common frames omitted
Caused by: 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 org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'clusterCoordinationProtocolSenderListener' defined in class path resource [nifi-cluster-protocol-context.xml]: Cannot resolve reference to bean 'protocolListener' while setting constructor argument; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with:
异常的原始原因是Error creating bean with name 'protocolListener' defined in class path resource [nifi-cluster-protocol-context.xml]: Unsatisfied dependency expressed through constructor parameter 1: Could not convert argument value of type [null] to required type [int]: ...参数 1（第二个参数）protocolListener是clusterNodeProtocolPort：
<!-- protocol listener -->
<bean id="protocolListener" class="org.apache.nifi.cluster.protocol.impl.SocketProtocolListener">
<constructor-arg index="0">
<bean factory-bean="nifiProperties" factory-method="getClusterNodeProtocolThreads"/>
</constructor-arg>
<constructor-arg index="1">
<bean factory-bean="nifiProperties" factory-method="getClusterNodeProtocolPort"/>
</constructor-arg>
<constructor-arg ref="protocolServerSocketConfiguration" index="2"/>
<constructor-arg ref="protocolContext" index="3"/>
</bean>
在您的nifi.properties文件中，您应该有：nifi.cluster.node.protocol.port=11443或其他一些端口号。我猜你的nifi.properties. 请记住在每个节点上进行设置，并确保在同一台计算机上运行时端口不会冲突。
确保每个节点上的所有 Zookeeper 设置也是正确的。