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question asked: Aug 05 '21, 9:49 a.m.
question was seen: 632 times
last updated: Aug 05 '21, 12:09 p.m.

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Querying Work Item Type produces linkage error

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Peter Carenza (13●2) | asked Aug 05 '21, 9:49 a.m.
edited Aug 05 '21, 9:52 a.m.

 When attempting to create a work item using the Java Plain API (using groovy method shown here: How can I script Jazz/RTC using Groovy? - Jazz Forum) I have run into a Linkage error when attempting to get a Work Item Type object from the repository: 


[2021-08-05T13:38:28.711Z] class path: F:\ProgramFiles\Groovy\Groovy-2.4.16\lib\groovy-2.4.16.jar
[2021-08-05T13:38:28.711Z] Caught: java.lang.LinkageError: loader constraint violation in interface itable initialization for class org.apache.xerces.dom.NodeImpl: when selecting method 'org.w3c.dom.NodeList org.w3c.dom.Node.getChildNodes()' the class loader 'bootstrap' for super interface org.w3c.dom.Node, and the class loader org.codehaus.groovy.tools.RootLoader @326de728 of the selected method's abstract class, org.apache.xerces.dom.NodeImpl have different Class objects for the type org.w3c.dom.NodeList used in the signature (org.w3c.dom.Node is in module java.xml of loader 'bootstrap'; org.apache.xerces.dom.NodeImpl is in unnamed module of loader org.codehaus.groovy.tools.RootLoader @326de728, parent loader 'app')
[2021-08-05T13:38:28.712Z] java.lang.LinkageError: loader constraint violation in interface itable initialization for class org.apache.xerces.dom.NodeImpl: when selecting method 'org.w3c.dom.NodeList org.w3c.dom.Node.getChildNodes()' the class loader 'bootstrap' for super interface org.w3c.dom.Node, and the class loader org.codehaus.groovy.tools.RootLoader @326de728 of the selected method's abstract class, org.apache.xerces.dom.NodeImpl have different Class objects for the type org.w3c.dom.NodeList used in the signature (org.w3c.dom.Node is in module java.xml of loader 'bootstrap'; org.apache.xerces.dom.NodeImpl is in unnamed module of loader org.codehaus.groovy.tools.RootLoader @326de728, parent loader 'app')
[2021-08-05T13:38:28.712Z]  at org.apache.xerces.parsers.AbstractDOMParser.startDocument(Unknown Source)
[2021-08-05T13:38:28.712Z]  at org.apache.xerces.impl.dtd.XMLDTDValidator.startDocument(Unknown Source)
[2021-08-05T13:38:28.712Z]  at org.apache.xerces.impl.XMLDocumentScannerImpl.startEntity(Unknown Source)
[2021-08-05T13:38:28.712Z]  at org.apache.xerces.impl.XMLVersionDetector.startDocumentParsing(Unknown Source)
[2021-08-05T13:38:28.712Z]  at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
[2021-08-05T13:38:28.712Z]  at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
[2021-08-05T13:38:28.712Z]  at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
[2021-08-05T13:38:28.712Z]  at org.apache.xerces.parsers.DOMParser.parse(Unknown Source)
[2021-08-05T13:38:28.712Z]  at org.apache.xerces.jaxp.DocumentBuilderImpl.parse(Unknown Source)
[2021-08-05T13:38:28.712Z]  at com.ibm.team.process.internal.common.util.XMLUtil.getXmlDocument(XMLUtil.java:167)
[2021-08-05T13:38:28.712Z]  at com.ibm.team.process.internal.client.ThinClientProcess.createRepresentation(ThinClientProcess.java:791)
[2021-08-05T13:38:28.712Z]  at com.ibm.team.process.internal.client.ThinClientProcess.fetchConfigurationData(ThinClientProcess.java:306)
[2021-08-05T13:38:28.712Z]  at com.ibm.team.process.internal.client.ThinClientProcess.getConfigurationData(ThinClientProcess.java:297)
[2021-08-05T13:38:28.712Z]  at com.ibm.team.process.internal.client.ThinClientProcess.getProjectConfigurationData(ThinClientProcess.java:278)
[2021-08-05T13:38:28.712Z]  at com.ibm.team.workitem.client.internal.AuditableClientProcess.findProcessConfiguration(AuditableClientProcess.java:72)
[2021-08-05T13:38:28.712Z]  at com.ibm.team.workitem.common.internal.ConfigurationItemManager.resolveProcessConfiguration(ConfigurationItemManager.java:124)
[2021-08-05T13:38:28.712Z]  at com.ibm.team.workitem.common.internal.ConfigurationItemManager.readConfigurationItems(ConfigurationItemManager.java:107)
[2021-08-05T13:38:28.712Z]  at com.ibm.team.workitem.common.internal.WorkItemTypeManager.readConfigurationItems(WorkItemTypeManager.java:379)
[2021-08-05T13:38:28.712Z]  at com.ibm.team.workitem.common.internal.ConfigurationItemManager.updateCache(ConfigurationItemManager.java:99)
[2021-08-05T13:38:28.712Z]  at com.ibm.team.workitem.common.internal.util.CacheHelper.internalCheckCache(CacheHelper.java:107)
[2021-08-05T13:38:28.712Z]  at com.ibm.team.workitem.common.internal.util.CacheHelper.checkCache(CacheHelper.java:73)
[2021-08-05T13:38:28.712Z]  at com.ibm.team.workitem.common.internal.util.CacheHelper.checkCache(CacheHelper.java:65)
[2021-08-05T13:38:28.712Z]  at com.ibm.team.workitem.common.internal.ConfigurationItemManager.findConfigurationItem(ConfigurationItemManager.java:70)
[2021-08-05T13:38:28.712Z]  at com.ibm.team.workitem.common.internal.WorkItemTypeManager.findConfigurationItem(WorkItemTypeManager.java:247)
[2021-08-05T13:38:28.712Z]  at com.ibm.team.workitem.common.internal.WorkItemTypeManager.findConfigurationItem(WorkItemTypeManager.java:242)
[2021-08-05T13:38:28.712Z]  at com.ibm.team.workitem.common.internal.WorkItemCommon.findWorkItemType(WorkItemCommon.java:452)
[2021-08-05T13:38:28.712Z]  at com.ibm.team.workitem.common.IWorkItemCommon$findWorkItemType$1.call(Unknown Source)
[2021-08-05T13:38:28.712Z]  at das.RTC.createWI(RTC.groovy:971)
[2021-08-05T13:38:28.712Z]  at das.RTC$createWI$9.call(Unknown Source)
[2021-08-05T13:38:28.712Z]  at Get_BD_Properties.run(Get_BD_Properties.groovy:28)
[2021-08-05T13:38:28.712Z]  at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[2021-08-05T13:38:28.712Z]  at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
[2021-08-05T13:38:28.712Z]  at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
            
        
How would I correct such an issue? Do I need to exclude a jar from the classpath?And if the fix is not obtainable, is there another way to obtain an IWorkItemType other than through IWorkItemCommon.findWorkItemType? 

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Ralph Schoon (61.8k●3●36●43) | answered Aug 05 '21, 10:36 a.m.
FORUM ADMINISTRATOR / FORUM MODERATOR / JAZZ DEVELOPER

There is a class loader error involving Xerces. I am not sure if Xerces should be involved. I would suggest to xheck if the Plain Java Code runs in Java only and then check with Groovy. In case that fails I'd try Groovy forums.

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Peter Carenza commented Aug 05 '21, 12:09 p.m.

Xerces is in the jazz build toolkit. When I try to omit the xerces jar from the classpath, it immediately fails with 

[2021-08-05T16:04:18.927Z] Caught: javax.xml.parsers.FactoryConfigurationError: Provider org.apache.xerces.jaxp.SAXParserFactoryImpl not found
[2021-08-05T16:04:18.927Z] javax.xml.parsers.FactoryConfigurationError: Provider org.apache.xerces.jaxp.SAXParserFactoryImpl not found
[2021-08-05T16:04:18.927Z]  at org.eclipse.core.runtime.spi.RegistryStrategy.getXMLParser(RegistryStrategy.java:382)
[2021-08-05T16:04:18.927Z]  at org.eclipse.core.internal.registry.ExtensionRegistry.addContribution(ExtensionRegistry.java:1062)
    
and fails TeamPlatform.startup().

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