[jboss-jira] [JBoss JIRA] Created: (JBRULES-792) Some "collect" rules cause hang during assertion

[Dirk Bergstrom (JIRA)]

Some "collect" rules cause hang during assertion
------------------------------------------------

                 Key: JBRULES-792
                 URL: http://jira.jboss.com/jira/browse/JBRULES-792
             Project: JBoss Rules
          Issue Type: Bug
      Security Level: Public (Everyone can see)
    Affects Versions: 3.1-m2
            Reporter: Dirk Bergstrom
         Assigned To: Mark Proctor


Some combinations of collect rules and objects result in an endless
busy loop during assertion (100% CPU usage for 18 hours and counting).
The problem doesn't happen for every object, but it is repeatable for
a given object.

For instance, with the following rule:

rule "Find all RLIs for user"
when
  $user : User( )
  $rli_list : RecordSet( size > 0 ) from
   collect( RLIRecord( $resp : responsible -> ( $user.hasReport($resp) ) ) )
then
 $user.setRecords($rli_list, DataSource.RLI);
end

With 92 Users asserted, my code asserts the first 1368 RLI objects at 6-8
miliseconds per assertion, then hangs hard on #1369 (always the same
object).  It has sat there occupying a cpu full time for the last 18
hours, with no visible progress.

On the other hand, with these two rules:

when
  $release : ReleaseRecord( $relname : relname )
  $user : User( )
  $pr_list : RecordSet( size > 0 ) from
   collect( PRRecord( releases contains $relname,
    $resp : responsible -> ( $user.hasReport($resp) ) ) )
then
 $user.setRecords($pr_list, $release, DataSource.GNATS);
end

rule "Find all PRs for user"
when
  $user : User( )
  $pr_list : RecordSet( size > 0 ) from
   collect( PRRecord( $resp : responsible -> ( $user.hasReport($resp) ) ) )
then
 $user.setRecords($pr_list, DataSource.GNATS);
end

With 92 Users and 37 ReleaseRecords asserted, I can assert all 10600
PR objects, at between 10 and 100 msec per (it slows down a bit
towards the end).  Then on the next cycle the app asserts several
hundred more User objects, and later asserts another 1500 Users,
without a hitch.

If need be, I have examples of other rule/object combinations that do
and don't work.  Note that a version of the RLIRecord class is
attached to JBRULES 740.

I'm using trunk, at revision 108xx -- forgot to note the exact
revision, but it includes tirelli's hashcode caching, and a few other
changes after that.

This is a follow-on to JBRULES 740.


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