AlfaSack opened a new issue, #9398:
URL: https://github.com/apache/netbeans/issues/9398
### Apache NetBeans version
Apache NetBeans 29
### What happened
### Apache NetBeans version
Apache NetBeans 29
### What happened
Opening any `.jsp` file via the Projects window causes the editor tab to
flash open and immediately close. The IDE log shows a `NullPointerException` in
`JspParserImpl.createParseProxy(JspParserImpl.java:234)`:
```
java.lang.NullPointerException: Cannot invoke
"org.netbeans.api.j2ee.core.Profile.isAtLeast(org.netbeans.api.j2ee.core.Profile)"
because the return value of
"org.netbeans.modules.web.api.webmodule.WebModule.getJ2eeProfile()" is null
at
org.netbeans.modules.web.jspparser.JspParserImpl.createParseProxy(JspParserImpl.java:234)
at
org.netbeans.modules.web.jspparser.JspParserImpl.getParseProxy(JspParserImpl.java:225)
at
org.netbeans.modules.web.jspparser.JspParserImpl.getJspOpenInfo(JspParserImpl.java:177)
at
org.netbeans.modules.web.core.jsploader.TagLibParseSupport.getCachedOpenInfo(TagLibParseSupport.java:246)
at
org.netbeans.modules.web.core.jsploader.JspDataObject.findFileEncoding(JspDataObject.java:287)
at
org.netbeans.modules.web.core.jsploader.JspDataObject.getFileEncoding(JspDataObject.java:276)
at
org.netbeans.modules.web.core.jsploader.BaseJspEditorSupport.verifyEncoding(BaseJspEditorSupport.java:276)
at
org.netbeans.modules.web.core.jsploader.BaseJspEditorSupport.open(BaseJspEditorSupport.java:257)
at org.openide.actions.OpenAction.performAction(OpenAction.java:59)
...
```
A follow-up `IllegalStateException` is then logged from
`BaseJspEditorSupport$4.propertyChange` during the resulting document-close
cleanup, which is why the tab disappears instantly:
```
INFO [org.netbeans.modules.web.core.jsploader.BaseJspEditorSupport$4]:
property change fired with both new and old value null!
java.lang.IllegalStateException
at
org.netbeans.modules.web.core.jsploader.BaseJspEditorSupport$4.propertyChange(BaseJspEditorSupport.java:166)
...
at
org.openide.text.DocumentOpenClose$DocumentClose.run(DocumentOpenClose.java:985)
```
Root cause appears to be that `JspParserImpl.createParseProxy` calls
`webModule.getJ2eeProfile().isAtLeast(...)` without guarding against
`getJ2eeProfile()` returning `null`. `WebModule.getJ2eeProfile()` legitimately
returns `null` for projects that aren't registered as Jakarta EE web modules —
free-form projects, Ant Java projects that happen to contain `.jsp` files, GWT
projects with a `webapp/` directory, or `.jsp` files opened standalone from the
Favorites window.
This is a regression introduced by #8976 (*Enable parsing of JSP 3.0
(Jakarta) based sources*) in NetBeans 29.
### Language / Project Type / NetBeans Component
JSP / `enterprise/web.jspparser`
### How to reproduce
1. Have any project containing `.jsp` files where
`WebModule.getJ2eeProfile()` returns `null` (e.g. Ant free-form project, or a
Java/GWT project with `.jsp` files under a webapp folder but no Jakarta EE
profile configured).
2. Double-click a `.jsp` file in the Projects window.
3. The editor tab opens and immediately closes; the NPE above appears in
`messages.log`.
### Did this work correctly in an earlier version?
Yes — works correctly in Apache NetBeans 28.
### Operating System
Linux — Ubuntu MATE 24.04 (kernel 6.x, amd64)
### JDK
<!-- bitte deine JDK-Version eintragen, z. B. Temurin 21.0.5 -->
### Apache NetBeans packaging
<!-- z. B. Apache binary zip / Codelerity .deb / snap -->
### Anything else
Likely fix: null-guard the `WebModule.getJ2eeProfile()` call in
`JspParserImpl.createParseProxy` (and `getParseProxy`), falling back to the JSP
2.x parsing path when no profile is set. As a current workaround, disabling the
`org.netbeans.modules.web.jspparser` module (Tools → Plugins → Installed) lets
`.jsp` files open again, but obviously without JSP parsing/completion.
cc @matthiasblaesing — author of #8976.
### Are you willing to submit a pull request?
<!-- ja/nein nach Wunsch -->
### Language / Project Type / NetBeans Component
_No response_
### How to reproduce
Simply open .jsp file with active "Java Web and EE".
### Did this work correctly in an earlier version?
Apache NetBeans 28
### Operating System
Ubuntu
### JDK
JDBK 25
### Apache NetBeans packaging
Apache NetBeans binary zip
### Anything else
_No response_
### Are you willing to submit a pull request?
No
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