Exceptions in the resolver

[Guillaume Nodet <gn...@gmail.com>]

I just came across the following exception:

ERROR: Bundle org.apache.felix.fileinstall [6] Error starting xxxxxx
(java.lang.IllegalStateException: Nested resolve operations not
allowed.)
java.lang.IllegalStateException: Nested resolve operations not allowed.
	at org.apache.felix.framework.StatefulResolver.resolve(StatefulResolver.java:114)
	at org.apache.felix.framework.Felix.resolveBundleRevision(Felix.java:3887)
	at org.apache.felix.framework.Felix.startBundle(Felix.java:1885)
	at org.apache.felix.framework.Felix.setActiveStartLevel(Felix.java:1208)
	at org.apache.felix.framework.FrameworkStartLevelImpl.run(FrameworkStartLevelImpl.java:295)
	at java.lang.Thread.run(Thread.java:680)


Given the stack trace clearly show no reentrance, I wonder if there's
a timing / synchronization issue here.
FWIW, I was running under a profile, so very slow and that may be the
reason why those exceptions have been raised (I don't usually see them
under normal conditions).

Thoughts?

-- 
------------------------
Guillaume Nodet
------------------------
Blog: http://gnodet.blogspot.com/
------------------------
FuseSource, Integration everywhere
http://fusesource.com

Re: Exceptions in the resolver

["Richard S. Hall" <he...@ungoverned.org>]

Odd. The check for nested resolves only happens in two places (when 
performing a normal resolve or a resolve for a dynamic import). In both 
cases, the global lock is acquired first and then the "resolving" flag 
is checked/set and unset using a finally block.

So, it seems the only potential problem area could be if somehow the 
global lock was acquired when it shouldn't have been. Looking at the 
code, it appears to do the right thing, so I'm not really sure without 
being able to reproduce.

-> richard

On 2/1/12 04:40 , Guillaume Nodet wrote:
> I just came across the following exception:
>
> ERROR: Bundle org.apache.felix.fileinstall [6] Error starting xxxxxx
> (java.lang.IllegalStateException: Nested resolve operations not
> allowed.)
> java.lang.IllegalStateException: Nested resolve operations not allowed.
> 	at org.apache.felix.framework.StatefulResolver.resolve(StatefulResolver.java:114)
> 	at org.apache.felix.framework.Felix.resolveBundleRevision(Felix.java:3887)
> 	at org.apache.felix.framework.Felix.startBundle(Felix.java:1885)
> 	at org.apache.felix.framework.Felix.setActiveStartLevel(Felix.java:1208)
> 	at org.apache.felix.framework.FrameworkStartLevelImpl.run(FrameworkStartLevelImpl.java:295)
> 	at java.lang.Thread.run(Thread.java:680)
>
>
> Given the stack trace clearly show no reentrance, I wonder if there's
> a timing / synchronization issue here.
> FWIW, I was running under a profile, so very slow and that may be the
> reason why those exceptions have been raised (I don't usually see them
> under normal conditions).
>
> Thoughts?
>