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'Path for project must have only one segment' error when creating Servlet [message #1855170]

Fri, 30 September 2022 08:13

Frank Tavernier

Messages: 10
Registered: August 2020

Junior Member

Dear community,

I am following the course 'Learn Maven and Ant' on Udemy. I am at the Maven part and the teacher uses Eclipse. I managed to follow along and now I have hit the next stumbling block.

We have created a new Maven project 'proj-a' with the artifact 'maven-archetype-webapp'.
In src/main/java we created a package 'company.com.proj_a'.
Then the teacher proceeds creating a servlet next to that. For that he right-clicks on the package 'company.com.proj_a' → other and finds a Servlet in there.

For me there was no Servlet, but after installing a plugin and opening the 'Java EE' perspective, there is one listed. So, I continue the lesson, select 'Servlet' and Click the Next button. Nothing happens. When the teacher clicks that another dialog window appears.
Double-clicking 'Servlet' generates the error message window with the message:
"An error has occurred. See error log for more details.
Path for project must have only one segment."

I have found what looks like the pertinent error log, but it is long, so I will only post the first 20 lines :

java.lang.IllegalArgumentException: Path for project must have only one segment.
	at org.eclipse.core.runtime.Assert.isLegal(Assert.java:66)
	at org.eclipse.core.internal.resources.WorkspaceRoot.getProject(WorkspaceRoot.java:151)
	at org.eclipse.jst.j2ee.internal.web.operations.NewWebClassDataModelProvider.getJavaEEVersion(NewWebClassDataModelProvider.java:258)
	at org.eclipse.jst.j2ee.internal.web.operations.NewWebClassDataModelProvider.projectUsesJakartaPackages(NewWebClassDataModelProvider.java:212)
	at org.eclipse.jst.j2ee.internal.web.operations.NewServletClassDataModelProvider.getDefaultProperty(NewServletClassDataModelProvider.java:243)
	at org.eclipse.wst.common.frameworks.internal.datamodel.DataModelImpl.getProperty(DataModelImpl.java:130)
	at org.eclipse.wst.common.frameworks.internal.datamodel.DataModelImpl.getStringProperty(DataModelImpl.java:153)
	at org.eclipse.wst.common.frameworks.internal.datamodel.ui.DataModelSynchHelper.setWidgetValue(DataModelSynchHelper.java:335)
	at org.eclipse.wst.common.frameworks.internal.datamodel.ui.DataModelSynchHelper.doSynchUIWithModel(DataModelSynchHelper.java:235)
	at org.eclipse.wst.common.frameworks.internal.datamodel.ui.DataModelSynchHelper.synchUIWithModel(DataModelSynchHelper.java:210)
	at org.eclipse.wst.common.frameworks.internal.datamodel.ui.DataModelSynchHelper.synchComposite(DataModelSynchHelper.java:452)
	at org.eclipse.wst.common.frameworks.internal.datamodel.ui.DataModelSynchHelper.synchText(DataModelSynchHelper.java:460)
	at org.eclipse.wst.common.frameworks.internal.datamodel.ui.DataModelSynchHelper.synchText(DataModelSynchHelper.java:456)
	at org.eclipse.jst.j2ee.internal.wizard.NewJavaClassWizardPage.addSuperclassGroup(NewJavaClassWizardPage.java:442)
	at org.eclipse.jst.j2ee.internal.wizard.NewJavaClassWizardPage.createTopLevelComposite(NewJavaClassWizardPage.java:155)
	at org.eclipse.jst.servlet.ui.internal.wizard.NewWebClassWizardPage.createTopLevelComposite(NewWebClassWizardPage.java:85)
	at org.eclipse.jst.servlet.ui.internal.wizard.NewServletClassWizardPage.createTopLevelComposite(NewServletClassWizardPage.java:126)
	at org.eclipse.wst.common.frameworks.internal.datamodel.ui.DataModelWizardPage.createControl(DataModelWizardPage.java:100)
	at org.eclipse.jface.wizard.WizardDialog.updateForPage(WizardDialog.java:1240)

When I looked on line I found a few other complaints about that problem, but those were under different circumstances. How can I add a Servlet to my project ?

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Re: 'Path for project must have only one segment' error when creating Servlet [message #1855171 is a reply to message #1855170]

Fri, 30 September 2022 08:19

Jay Arthanareeswaran

Messages: 128
Registered: July 2009

Senior Member

I don't really know much about the Eclipse JST or maven but it's interesting to note that you are creating a project with a '-' in its name. Generally, Eclipse doesn't allow hyphens in project name. Can you try removing that and see if that helps.
Of course, not that it is expected to crash. That looks like a problem to be dealt with.

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