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http://jira.magnolia-cms.com/browse/MAGNOLIA-2487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=19851#action_19851
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Brian Bowman commented on MAGNOLIA-2487:
----------------------------------------
Hi Gregory,
I am not the developer of the servlet, so I may not be able to answer all of
your questions regarding it. The servlet contains the connection information
to a unique JDBC connection. It also loads some data from this connection into
application scope. Some of its parameters are referenced by other classes.
The exception sounds like the right solution.
Thanks,
Brian
> Empty servlet mapping causes error upon installation
> ----------------------------------------------------
>
> Key: MAGNOLIA-2487
> URL: http://jira.magnolia-cms.com/browse/MAGNOLIA-2487
> Project: Magnolia
> Issue Type: Bug
> Environment: ubuntu 8.04 x64, tomcat 5.5, java 1.5 x64
> Reporter: Brian Bowman
> Assignee: Gregory Joseph
> Priority: Minor
> Fix For: 4.0
>
>
> If a servlet mapping is left empty:
> <mappings>
> <mapping></mapping>
> </mappings>
> There is a null error upon module installation via the web interface and
> installation does not complete. The error message is:
> ERROR info.magnolia.module.ui.ModuleManagerWebUI
> ModuleManagerWebUI.java(run:124) 28.11.2008 14:08:11 Could not perform
> installation: null
> java.lang.NullPointerException
> at java.lang.StringBuffer.<init>(StringBuffer.java:104)
> at info.magnolia.cms.core.Path.getValidatedLabel(Path.java:347)
> at
> info.magnolia.module.delta.RegisterServletTask.execute(RegisterServletTask.java:80)
> at
> info.magnolia.module.delta.ArrayDelegateTask.execute(ArrayDelegateTask.java:117)
> at
> info.magnolia.module.delta.RegisterModuleServletsTask.execute(RegisterModuleServletsTask.java:63)
> at
> info.magnolia.module.ModuleManagerImpl.applyDeltas(ModuleManagerImpl.java:455)
> at
> info.magnolia.module.ModuleManagerImpl.installOrUpdateModule(ModuleManagerImpl.java:435)
> at info.magnolia.module.ModuleManagerImpl$1.exec(ModuleManagerImpl.java:262)
> at info.magnolia.context.MgnlContext.doInSystemContext(MgnlContext.java:411)
> at
> info.magnolia.module.ModuleManagerImpl.performInstallOrUpdate(ModuleManagerImpl.java:257)
> at
> info.magnolia.module.ui.ModuleManagerWebUI$2.run(ModuleManagerWebUI.java:122)
> at java.lang.Thread.run(Thread.java:595)
> ERROR info.magnolia.module.InstallContextImpl
> InstallContextImpl.java(error:83) 28.11.2008 14:08:11 > Could not perform
> installation: null
> java.lang.NullPointerException
> at java.lang.StringBuffer.<init>(StringBuffer.java:104)
> at info.magnolia.cms.core.Path.getValidatedLabel(Path.java:347)
> at
> info.magnolia.module.delta.RegisterServletTask.execute(RegisterServletTask.java:80)
> at
> info.magnolia.module.delta.ArrayDelegateTask.execute(ArrayDelegateTask.java:117)
> at
> info.magnolia.module.delta.RegisterModuleServletsTask.execute(RegisterModuleServletsTask.java:63)
> at
> info.magnolia.module.ModuleManagerImpl.applyDeltas(ModuleManagerImpl.java:455)
> at
> info.magnolia.module.ModuleManagerImpl.installOrUpdateModule(ModuleManagerImpl.java:435)
> at info.magnolia.module.ModuleManagerImpl$1.exec(ModuleManagerImpl.java:262)
> at info.magnolia.context.MgnlContext.doInSystemContext(MgnlContext.java:411)
> at
> info.magnolia.module.ModuleManagerImpl.performInstallOrUpdate(ModuleManagerImpl.java:257)
> at
> info.magnolia.module.ui.ModuleManagerWebUI$2.run(ModuleManagerWebUI.java:122)
> at java.lang.Thread.run(Thread.java:595)
> One fix for this is to add a null check in the execute() method of
> info.magnolia.module.delta.RegisterServletTask:
> if (pattern != null) {
> String mappingNodeName =
> Path.getUniqueLabel(mappingsNode, Path.getValidatedLabel(pattern));
> final Content mappingNode =
> mappingsNode.createContent(mappingNodeName, ItemType.CONTENTNODE);
> NodeDataUtil.getOrCreateAndSet(mappingNode, "pattern",
> pattern);
> }
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