CPU Load issue with 2.3.6 and 2.4.0
-----------------------------------
Key: JCR-3244
URL: https://issues.apache.org/jira/browse/JCR-3244
Project: Jackrabbit Content Repository
Issue Type: Bug
Components: jackrabbit-jcr-server
Reporter: Christian Stocker
We discovered an issue with adding and removing references to a Weak Reference
Multi-Value property
within the same session, which leads to running 100% CPU .
In PHPCR/Jackalope, I do the following:
{noformat}
// remove the weakreference property if one was there
$m->setProperty("refs",null);
$session->save();
//add some references
$m->setProperty("refs",$refs,10);
$session->save();
//remove one and set the others again
array_pop($refs);
$m->setProperty("refs",$refs,10);
$session->save();
{noformat}
If I do the last setProperty() with a new session, then it works.
On the HTTP level it looks like this:
https://gist.github.com/1869626
The last REPORT (where we try to resolve the UUID to a path), it hangs.
According to Jukka, the problem is the following:
{quote}
Yep. From the thread dump posted by Lukas it looks like the culprit
here is the appliesToResource() lock computation done by the
TxLockManagerImpl class in jackrabbit-webdav. The method makes a wrong
assumption about the return value of the Text.getRelativeParent()
utility method, and ends up in an infinite loop.
{quote}
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