https://community.cloudera.com/t5/Support-Questions/java-lang-ClassCastException-org-apache-xerces-parsers/m-p/151760#M114239 <P>Hi Everyone,</P><P>I'm facing the some weird issue. In my project we are using everything is custom code of NiFi, For xml parsing we are using the DOM parser, after deploying the NAR file into NiFi lib directory after restart i'm facing the below error. please anybody can give me the solution on this. </P><P>Custom Processor:</P><P>XmlValidation(Domparser)</P><P>CustomPutHdfs(Hdfs)</P><PRE>java.lang.ClassCastException: org.apache.xerces.parsers.XIncludeAwareParserConfiguration cannot be cast to org.apache.xerces.xni.parser.XMLParserConfiguration at org.apache.xerces.parsers.DOMParser.&lt;init&gt;(Unknown Source) ~[xercesImpl-2.9.1.jar:na] at org.apache.xerces.parsers.DOMParser.&lt;init&gt;(Unknown Source) ~[xercesImpl-2.9.1.jar:na] at org.apache.xerces.jaxp.DocumentBuilderImpl.&lt;init&gt;(Unknown Source) ~[xercesImpl-2.9.1.jar:na] at org.apache.xerces.jaxp.DocumentBuilderFactoryImpl.newDocumentBuilder(Unknown Source) ~[xercesImpl-2.9.1.jar:na] at org.apache.hadoop.conf.Configuration.loadResource(Configuration.java:2482) ~[hadoop-common-2.6.2.jar:na] at org.apache.hadoop.conf.Configuration.loadResources(Configuration.java:2444) ~[hadoop-common-2.6.2.jar:na] at org.apache.hadoop.conf.Configuration.getProps(Configuration.java:2361) ~[hadoop-common-2.6.2.jar:na] at org.apache.hadoop.conf.Configuration.get(Configuration.java:968) ~[hadoop-common-2.6.2.jar:na] at org.apache.nifi.hadoop.SecurityUtil.isSecurityEnabled(SecurityUtil.java:84) ~[nifi-hadoop-utils-0.6.0.jar:0.6.0] at org.apache.nifi.hadoop.KerberosProperties.validatePrincipalAndKeytab(KerberosProperties.java:121) ~[nifi-hadoop-utils-0.6.0.jar:0.6.0] at org.apache.nifi.processors.hadoop.AbstractHadoopProcessor.customValidate(AbstractHadoopProcessor.java:154) ~[nifi-hdfs-processors-0.6.0.jar:0.6.0] at org.apache.nifi.components.AbstractConfigurableComponent.validate(AbstractConfigurableComponent.java:123) ~[nifi-api-0.6.0.jar:0.6.0] at org.apache.nifi.controller.StandardProcessorNode.isValid(StandardProcessorNode.java:911) ~[nifi-framework-core-0.6.0.jar:0.6.0] at org.apache.nifi.controller.FlowController.getProcessorStatus(FlowController.java:2529) [nifi-framework-core-0.6.0.jar:0.6.0] at org.apache.nifi.controller.FlowController.getGroupStatus(FlowController.java:2146) [nifi-framework-core-0.6.0.jar:0.6.0] at org.apache.nifi.controller.FlowController.getGroupStatus(FlowController.java:2162) [nifi-framework-core-0.6.0.jar:0.6.0] at org.apache.nifi.controller.FlowController.getGroupStatus(FlowController.java:2162) [nifi-framework-core-0.6.0.jar:0.6.0] at org.apache.nifi.controller.FlowController.getGroupStatus(FlowController.java:2162) [nifi-framework-core-0.6.0.jar:0.6.0] at org.apache.nifi.controller.FlowController$HeartbeatMessageGeneratorTask.createHeartbeatMessage(FlowController.java:3819) [nifi-framework-core-0.6.0.jar:0.6.0] at org.apache.nifi.controller.FlowController$HeartbeatMessageGeneratorTask.run(FlowController.java:3802) [nifi-framework-core-0.6.0.jar:0.6.0] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_71] at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308) [na:1.8.0_71] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180) [na:1.8.0_71] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294) [na:1.8.0_71] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_71] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_71] at java.lang.Thread.run(Thread.java:745) [na:1.8.0_71]</PRE> Wed, 22 Jun 2016 20:12:18 GMT viswa_come 2016-06-22T20:12:18Z