org.apache.xerces.parsers.XIncludeAwareParserConfiguration cannot be cast to org.apache.xerces.xni.parser.XMLParserConfiguration
Hello,
When task is supposed to get ready it fails, log shows the error :
| java.lang.ClassCastException : "org.apache.xerces.parsers.XIncludeAwareParserConfiguration cannot be cast to org.apache.xerces.xni.parser.XMLParserConfiguration"
java.lang.ClassCastException: org.apache.xerces.parsers.XIncludeAwareParserConfiguration cannot be cast to org.apache.xerces.xni.parser.XMLParserConfiguration
Restarting the tomcat and start process again helps the problem, but after some time the error happens again.
Does anyone know what is problem and solution of it ?
Thanks in advance
P.S.
I am using community 2021.1 studio and tomcat bundle.
Comments
Is it some custom code of yours that manipulates XML?
Hello,
No
I think the problem comes from xercesImpl - 2.9.1,jar
Can there be a problem ?
As XIncludeAwareParserConfiguration IS a XMLParserConfiguration, the cast impossibility comes probably from the fact that 2 classloaders conflict with each other.
Can you give more context on what your process is doing on this particular task (connector, specific Groovy script, ...) ?
The task has no connectors. It is human task, where I have created contract and with contract I fill bdm attributes. Also, task has Standard Loop, when specific contract parameter is true, loop happens
Can you just drop the complete error stacktrace, so that I can see from what Bonita layer comes the error, please?
2021-06-04 10:08:46.555 +0400 SEVERE (Bonita-Worker-1-01) org.bonitasoft.engine.execution.work.InSessionBonitaWork THREAD_ID=169 | HOSTNAME=BPMTEST | TENANT_ID=1 | java.lang.ClassCastException : "org.apache.xerces.parsers.XIncludeAwareParserConfiguration cannot be cast to org.apache.xerces.xni.parser.XMLParserConfiguration"
java.lang.ClassCastException: org.apache.xerces.parsers.XIncludeAwareParserConfiguration cannot be cast to org.apache.xerces.xni.parser.XMLParserConfiguration
at org.apache.xerces.parsers.SAXParser.(Unknown Source)
at org.apache.xerces.parsers.SAXParser.(Unknown Source)
at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.(Unknown Source)
at org.apache.xerces.jaxp.SAXParserImpl.(Unknown Source)
at org.apache.xerces.jaxp.SAXParserFactoryImpl.newSAXParser(Unknown Source)
at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.getXMLReader(UnmarshallerImpl.java:159)
at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(Unknown Source)
at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(Unknown Source)
at org.bonitasoft.engine.core.connector.impl.ConnectorServiceImpl.convert(ConnectorServiceImpl.java:400)
at org.bonitasoft.engine.core.connector.impl.ConnectorServiceImpl.loadConnectors(ConnectorServiceImpl.java:376)
at org.bonitasoft.engine.core.connector.impl.ConnectorServiceImpl.getConnectorImplementation(ConnectorServiceImpl.java:718)
at org.bonitasoft.engine.connector.ConnectorServiceDecorator.getConnectorImplementationDescriptor(ConnectorServiceDecorator.java:162)
at org.bonitasoft.engine.execution.work.ExecuteConnectorWork$EvaluateParameterAndGetConnectorInstance.call(ExecuteConnectorWork.java:264)
at org.bonitasoft.engine.execution.work.ExecuteConnectorWork$EvaluateParameterAndGetConnectorInstance.call(ExecuteConnectorWork.java:218)
at org.bonitasoft.engine.transaction.JTATransactionServiceImpl.executeInTransaction(JTATransactionServiceImpl.java:261)
at org.bonitasoft.engine.execution.work.ExecuteConnectorWork.work(ExecuteConnectorWork.java:148)
at org.bonitasoft.engine.execution.work.failurewrapping.TxInHandleFailureWrappingWork.work(TxInHandleFailureWrappingWork.java:40)
at org.bonitasoft.engine.execution.work.failurewrapping.TxInHandleFailureWrappingWork.work(TxInHandleFailureWrappingWork.java:40)
at org.bonitasoft.engine.execution.work.failurewrapping.TxInHandleFailureWrappingWork.work(TxInHandleFailureWrappingWork.java:40)
at org.bonitasoft.engine.execution.work.failurewrapping.TxInHandleFailureWrappingWork.work(TxInHandleFailureWrappingWork.java:40)
at org.bonitasoft.engine.execution.work.InSessionBonitaWork.work(InSessionBonitaWork.java:60)
at org.bonitasoft.engine.work.BonitaThreadPoolExecutor.lambda$submit$1(BonitaThreadPoolExecutor.java:131)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
According to the stacktrace, you DO have a connector on the failing task.
The error seems to indicate there is a conflict with Xerces classes. It may be a transitive dependency of the connector you use.
Can you double-check and indicate what connector it is, please?
Also, can you indicate:
Thx
I really do not have connector on failing task. I have one task where I use office connectors, that is why I add xerces library. But I use them not in failed task, connectors are used in different task.
Bonita Community 2021.1
You are perfectly right: the first time we check if a task has connectors to execute, we load all the connectors of the process, and keep them in cache, for faster later access. That explains why the task that fails is not the one that has the connector on it.
That being said, why did you have to add xerces library? In theory, the office connector should be self sufficient.
Also, where did you put it?
I have to add xerces library, because of it is not added word do not generate. When I do not have xercesImpl - 2.9.1,jar in process dependencies connector throws error : org.bonitasoft.engine.connector.ConnectorException: fr.opensagres.xdocreport.core.XDocReportException: org.xml.sax.SAXException: SAX2 driver class org.apache.xerces.parsers.SAXParser not found
java.lang.ClassNotFoundException: org.apache.xerces.parsers.SAXParser.
when I run locally it does not fail, but on server it does