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Bug 170415 - java.util.ConcurrentModificationException: Caller uses obsolete token sequence which is no longer valid. Underlying token hierarchy has been modified: modCount=10 != upToDateModCount=13 Please report
Summary: java.util.ConcurrentModificationException: Caller uses obsolete token sequenc...
Status: RESOLVED FIXED
Alias: None
Product: contrib
Classification: Unclassified
Component: Code (show other bugs)
Version: 6.x
Hardware: All All
: P3 blocker (vote)
Assignee: Michel Graciano
URL: http://statistics.netbeans.org/except...
Keywords:
Depends on:
Blocks:
 
Reported: 2009-08-15 19:11 UTC by Jan Lahoda
Modified: 2009-08-16 21:22 UTC (History)
0 users

See Also:
Issue Type: DEFECT
Exception Reporter: 155923

Attachments
stacktrace (5.03 KB, text/plain)
2009-08-15 19:11 UTC, Jan Lahoda 		Details
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Description Jan Lahoda 2009-08-15 19:11:23 UTC 
Build: NetBeans IDE Dev (Build jet-main-1129-on-090814)
VM: Java HotSpot(TM) Client VM, 11.0-b16, Java(TM) SE Runtime Environment, 1.6.0_11-b03
OS: Linux, 2.6.28-11-generic, i386

Stacktrace: 
java.util.ConcurrentModificationException: Caller uses obsolete token sequence which is no longer valid. Underlying token hierarchy has been modified: modCount=10 != upToDateModCount=13
Please report against caller's module which needs to be fixed (not the lexer module).
        at org.netbeans.api.lexer.TokenSequence.checkModCount(TokenSequence.java:745)
        at org.netbeans.api.lexer.TokenSequence.moveNext(TokenSequence.java:451)
        at org.netbeans.modules.showtodos.TodoSourceParsing.parse(TodoSourceParsing.java:97)
        at org.netbeans.modules.showtodos.TodoSourceParsing.parseForAnnotatable(TodoSourceParsing.java:132)
        at org.netbeans.modules.showtodos.TodoAnnotationProvider.parse(TodoAnnotationProvider.java:121)
        at org.netbeans.modules.showtodos.TodoAnnotationProvider.annotate(TodoAnnotationProvider.java:107)
Comment 1 Jan Lahoda 2009-08-15 19:11:30 UTC 
Created attachment 86272 [details]
stacktrace
Comment 2 Michel Graciano 2009-08-15 23:44:37 UTC 
Do you have any details about what was you doing (removing several lines or typing) and which project was you editing 
(maybe an nb module)? Thanks for your report
Comment 3 Michel Graciano 2009-08-16 00:58:53 UTC 
Which plugin version are you using? AFAIK you probably are running the latest version.
Comment 4 Michel Graciano 2009-08-16 01:06:11 UTC 
Should be fixed.

main/contrib: #15434:a56da5322d8e
Comment 5 Jan Lahoda 2009-08-16 15:32:24 UTC 
I did some editing. Most likely some more complex operation, like indent/un-indent, which are internally split into
several operations. apisupport project, but that should not matter, IMO. The used version of the module can be found in
the log, which is available in the exceptions report:
http://statistics.netbeans.org/exceptions/messageslog?id=244091
The version is:
org.netbeans.modules.showtodos [2.4.0.1 nbms-and-javadoc-3567-on-090721]

Sorry, but I do not think that the fix is fully correct - the problem is that the TokenSequence is used outside read (or
write) lock on the Document. Calling isValid() will make the exception less probable, but not impossible. Would be
better to do the operations under the document read lock [Document.reander()] (possibly locking it each time the finder
finds something and checking isValid() once immediately after read-locking the document). Might be also possible to do
the work in parsing.api's task, using the copy of the document text provided by the parsing.api and carefully handling
cancel, in order to prevent highlighting incorrect parts of the document.
Comment 6 Michel Graciano 2009-08-16 21:22:42 UTC 
Thanks for the tips. I will try to rewrite it with mentioned API asap. BTW, if you can point me to some module that uses 
parsing api's task? Thanks again for your help.