> From: Chris Newland [mailto:[EMAIL PROTECTED]]
>
> Hi All,
>
> I'm encountering a null pointer exception in the
> org.apache.cocoon.components.source.URLSource file when I run a stress
test
> of my Cocoon 2 system:
>
> java.lang.NullPointerException
> at
>
org.apache.cocoon.components.source.URLSource.getInfos(URLSource.java:95
)
> at
>
org.apache.cocoon.components.source.URLSource.getLastModified(URLSource.
java
> :110)
> at org.apache.cocoon.Cocoon.modifiedSince(Cocoon.java:376)
> at
<snip>
> Looking at the code makes me think this might be a
threading/synchronization
> bug as IMHO 'this.connection' is null and should have thrown the NPE
on the
> previous line.
It *is* threading bug. URLSource is not intended to be used by multiple
threads simultaneously. However, Cocoon.java uses it exactly this way.
> I'll do my best to trace the problem's origin but I'm out of the
country for
> 3 weeks as of tomorrow.
The quick (==bad performance) fix will be to surround call with
synchronized:
public boolean modifiedSince(long date) {
synchronized(this.configurationFile) {
this.configurationFile.refresh();
return date < this.configurationFile.getLastModified();
}
}
The better solution is to use ActiveMonitor. There was a discussion
about it but I do not remember the results of it.
Regards,
Vadim
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, email: [EMAIL PROTECTED]
