This issue was reported manually by sdedic.
It already has 4 duplicates 


Build: NetBeans IDE 7.1.1 (Build 201203012225)
VM: OpenJDK Client VM, 20.0-b11, OpenJDK Runtime Environment, 1.6.0_23-b23
OS: Linux

User Comments:
GUEST: restarted windows + netbeans and now it is scanning + scanning + scanning

choma13: when i create project by my local directory, scanning project is fast, but create project by samba directory, it is very slow! while scanning project, i can't use other useful function.
furthermore when netbeans is start, scanning project is performed automatically. and can't cancel!
next release, please fix performance of scanning project on samba..

I always have been using netbeans at all php project.
i love it and always thankful to you.

GUEST: Why offer a button to cancel the scanning process, if you do not allow it to happen? Fix this fucking error.

GUEST: It takes a lot of time and slows down the IDE




Stacktrace: 
java.lang.Exception: Scan canceled.
   at java.lang.Thread.getStackTrace(Thread.java:1495)
   at org.netbeans.modules.parsing.impl.indexing.LogContext.create(LogContext.java:74)
   at org.netbeans.modules.parsing.impl.indexing.LogContext.create(LogContext.java:67)
   at org.netbeans.modules.parsing.impl.indexing.PathRegistry.scheduleFirer(PathRegistry.java:769)
   at org.netbeans.modules.parsing.impl.indexing.PathRegistry.resetCacheAndFire(PathRegistry.java:764)
   at org.netbeans.modules.parsing.impl.indexing.PathRegistry.access$500(PathRegistry.java:83)