Bug 576520 - NPE in Index.query(Index.java:152) on deleting project
Summary: NPE in Index.query(Index.java:152) on deleting project
Status: VERIFIED FIXED
Alias: None
Product: JDT
Classification: Eclipse Project
Component: Core (show other bugs)
Version: 4.21   Edit
Hardware: PC All
: P3 normal (vote)
Target Milestone: 4.22 M3   Edit
Assignee: Andrey Loskutov CLA
QA Contact:
URL:
Whiteboard:
Keywords: regression
Depends on:
Blocks:
 
Reported: 2021-10-08 04:46 EDT by Gabriele Pezzini CLA
Modified: 2021-10-28 06:53 EDT (History)
3 users (show)

See Also:

Attachments
Eclipse debug call stack and eclipse error log (267.82 KB, application/vnd.openxmlformats-officedocument.wordprocessingml.document)
2021-10-08 04:46 EDT, Gabriele Pezzini CLA 		no flags Details
View All Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.
Description Gabriele Pezzini CLA 2021-10-08 04:46:07 EDT 
Created attachment 287281 [details]
Eclipse debug call stack and eclipse error log

This error happens while my plugin is running.

My plugin performs these steps

- creates a java project
- performs its task
- deletes the java project created below

It seems to me which the error occurs during the
delete of the java project.

The exception is:
java.lang.NullPointerException
	at org.eclipse.jdt.internal.core.index.Index.query(Index.java:152)
	at org.eclipse.jdt.internal.core.index.Index.getMetaIndexQualifications(Index.java:243)
	at org.eclipse.jdt.internal.core.search.indexing.IndexManager$MetaIndexUpdateRequest.execute(IndexManager.java:1772)
	at org.eclipse.jdt.internal.core.search.processing.JobManager.run(JobManager.java:432)
	at java.base/java.lang.Thread.run(Thread.java:834)
Comment 1 Gabriele Pezzini CLA 2021-10-08 04:49:43 EDT 
Note which in the previous version of Eclipse using the same plugin does not happes
Comment 2 Eclipse Genie CLA 2021-10-08 11:33:47 EDT 
New Gerrit change created: https://git.eclipse.org/r/c/jdt/eclipse.jdt.core/+/186310
Comment 4 Andrey Loskutov CLA 2021-10-23 10:57:44 EDT 
(In reply to Eclipse Genie from comment #3)
> Gerrit change https://git.eclipse.org/r/c/jdt/eclipse.jdt.core/+/186310 was
> merged to [master].
> Commit:
> http://git.eclipse.org/c/jdt/eclipse.jdt.core.git/commit/
> ?id=437144de085992ac398c6582dce05c16b64324db

@Gabrielle: would be nice if you could check if this nightly build (or any later one) fixes the problem:

https://download.eclipse.org/eclipse/downloads/drops4/I20211022-1800

If not, please provide new stack trace.
Comment 5 Gabriele Pezzini CLA 2021-10-28 05:16:36 EDT 
Hi,
I have tested using the suggested build and the error does not comes.

Thanks.
Comment 6 Andrey Loskutov CLA 2021-10-28 06:53:23 EDT 
(In reply to Gabriele Pezzini from comment #5)
> Hi,
> I have tested using the suggested build and the error does not comes.
> 
> Thanks.

Thanks Gabriele for validaton!