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Bug 31552

Summary: Deadlock when running projects/compilation tests
Product: projects Reporter: Vitezslav Stejskal <vstejskal>
Component: Generic InfrastructureAssignee: issues@projects <issues>
Status: CLOSED DUPLICATE    
Severity: blocker CC: dkonecny
Priority: P2 Keywords: THREAD
Version: 3.x   
Hardware: PC   
OS: All   
Issue Type: DEFECT Exception Reporter:
Attachments: full thread dump

Description Vitezslav Stejskal 2003-02-27 22:17:31 UTC 
There is a deadlock when running tests for
projects/compilation module, it seems to occure
under both jdk 1.3.1_02 and 1.4.1. It seems it is
caused by synchronization in
ProjectMember$Evnironment class.

The threads in deadlock are the 'FolderRecognizer'
(as usually) and 'ContainersList-Updater'. The
'FolderRcognizer' thread creates BTDataObject
which creates the ProjectMember for itself in its
ctor, but the 'ContainersList-Updater' tries to
access Lookup of another PM which keeps the lock
and indirectly asks some DataFolder for its children.

Several bad things happend at the same time:
1. BTDataObject does something in its ctor, this
should be avouded (especially calls to another
'higher' layer; the projects in this case)

2. ProjectMember$Environment performs wrong
synchronization in beforeLookup method, this is
probably the root cause.

3. The core/naming (DOEnum) uses DataSystems
(DataFolder.getChildren) to get the list of
bidings in the Context. It's unnecessary and it's
done this way just for the files ordering.
Comment 1 Vitezslav Stejskal 2003-02-27 22:25:39 UTC 
Created attachment 9203 [details]
full thread dump
Comment 2 David Konecny 2003-02-28 10:39:58 UTC 
ad #3 - already filed as issue 30632. I added your comment there for
the record.
Comment 3 Dusan Balek 2003-07-23 15:55:44 UTC 
Studying attached thread dump, this deadlock seems to be the same as
the one described in #30950

*** This issue has been marked as a duplicate of 30950 ***
Comment 4 Jan Becicka 2003-11-25 14:00:45 UTC 
As described in
http://www.netbeans.org/servlets/ReadMsg?msgId=619519&listName=nbdiscuss the
current work on projects prototype has been stopped.

Marking issue as VERIFIED --->
Comment 5 Jan Becicka 2003-11-25 14:09:23 UTC 
---> CLOSED