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https://issues.apache.org/jira/browse/NIFI-4092?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16310720#comment-16310720
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Joseph Witt commented on NIFI-4092:
-----------------------------------
We should document in the release-notes that this PR changes the number of
spaces that are used in formatting the XML output of templates. This could
cause pure diffs of older templates generated to newer templates generated.
> ClassCastException Warning during cluster sync
> ----------------------------------------------
>
> Key: NIFI-4092
> URL: https://issues.apache.org/jira/browse/NIFI-4092
> Project: Apache NiFi
> Issue Type: Bug
> Affects Versions: 1.3.0
> Reporter: Joseph Gresock
> Assignee: Matt Gilman
> Labels: release-notes
>
> This is the strack trace I receive, though I'm not sure it affects anything,
> since the cluster is eventually able to connect.
> 2017-06-20 13:46:44,680 WARN [Reconnect ip-172-31-55-36.ec2.internal:8443]
> o.a.n.c.c.node.NodeClusterCoordinator Problem encountered issuing
> reconnection request to node ip-172-31-55-36.ec2.internal:8443
> java.io.IOException:
> org.apache.nifi.controller.serialization.FlowSerializationException:
> java.lang.ClassCastException:
> org.apache.nifi.web.api.dto.TemplateDTO$JaxbAccessorM_getDescription_setDescription_java_lang_String
> cannot be cast to com.sun.xml.internal.bind.v2.runtime.reflect.Accessor
> at
> org.apache.nifi.persistence.StandardXMLFlowConfigurationDAO.save(StandardXMLFlowConfigurationDAO.java:143)
> at
> org.apache.nifi.controller.StandardFlowService.createDataFlowFromController(StandardFlowService.java:607)
> at
> org.apache.nifi.controller.StandardFlowService.createDataFlowFromController(StandardFlowService.java:100)
> at
> org.apache.nifi.cluster.coordination.node.NodeClusterCoordinator$2.run(NodeClusterCoordinator.java:706)
> at java.lang.Thread.run(Thread.java:748)
> Caused by:
> org.apache.nifi.controller.serialization.FlowSerializationException:
> java.lang.ClassCastException:
> org.apache.nifi.web.api.dto.TemplateDTO$JaxbAccessorM_getDescription_setDescription_java_lang_String
> cannot be cast to com.sun.xml.internal.bind.v2.runtime.reflect.Accessor
> at
> org.apache.nifi.controller.serialization.StandardFlowSerializer.addTemplate(StandardFlowSerializer.java:546)
> at
> org.apache.nifi.controller.serialization.StandardFlowSerializer.addProcessGroup(StandardFlowSerializer.java:203)
> at
> org.apache.nifi.controller.serialization.StandardFlowSerializer.addProcessGroup(StandardFlowSerializer.java:187)
> at
> org.apache.nifi.controller.serialization.StandardFlowSerializer.addProcessGroup(StandardFlowSerializer.java:187)
> at
> org.apache.nifi.controller.serialization.StandardFlowSerializer.serialize(StandardFlowSerializer.java:97)
> at
> org.apache.nifi.controller.FlowController.serialize(FlowController.java:1544)
> at
> org.apache.nifi.persistence.StandardXMLFlowConfigurationDAO.save(StandardXMLFlowConfigurationDAO.java:141)
> ... 4 common frames omitted
> Caused by: java.lang.ClassCastException:
> org.apache.nifi.web.api.dto.TemplateDTO$JaxbAccessorM_getDescription_setDescription_java_lang_String
> cannot be cast to com.sun.xml.internal.bind.v2.runtime.reflect.Accessor
> at
> com.sun.xml.internal.bind.v2.runtime.reflect.opt.OptimizedAccessorFactory.instanciate(OptimizedAccessorFactory.java:190)
> at
> com.sun.xml.internal.bind.v2.runtime.reflect.opt.OptimizedAccessorFactory.get(OptimizedAccessorFactory.java:129)
> at
> com.sun.xml.internal.bind.v2.runtime.reflect.Accessor$GetterSetterReflection.optimize(Accessor.java:388)
> at
> com.sun.xml.internal.bind.v2.runtime.property.SingleElementLeafProperty.<init>(SingleElementLeafProperty.java:77)
> at sun.reflect.GeneratedConstructorAccessor435.newInstance(Unknown
> Source)
> at
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
> at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
> at
> com.sun.xml.internal.bind.v2.runtime.property.PropertyFactory.create(PropertyFactory.java:113)
> at
> com.sun.xml.internal.bind.v2.runtime.ClassBeanInfoImpl.<init>(ClassBeanInfoImpl.java:166)
> at
> com.sun.xml.internal.bind.v2.runtime.JAXBContextImpl.getOrCreate(JAXBContextImpl.java:488)
> at
> com.sun.xml.internal.bind.v2.runtime.JAXBContextImpl.<init>(JAXBContextImpl.java:305)
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