Thanks. I'll give that a try and let you know how it goes. If I have time I'll try to create a simple test case that can replicate the bug and add that to the Jira ticket.
On Fri, 2006-11-03 at 12:15 +0000, Michael Neale wrote: > try doing: > > newWorkingMemory(true); > That will bypass that back reference - of course this means if you > update the rulebase, the rule changes won't propagate to the working > memories (but in your case, I am guessing you probably don't care !). > > Let us know how that helps. If it does help (or even if it doesn't) - > could you provide some more specifics perhaps in a JIRA (or email it > to me directly and I will do it) - as this sort of things is slippery > to reproduce. > > Michael. > > On 11/3/06, Per Jacobsson <[EMAIL PROTECTED]> wrote: > Hi all, > I've been testing JBoss Rules 3.0.4 in a multi threaded > application and > often when I put some load on the system all threads hang and > the CPU > sits at 100%. > > I'm using Java 1.5_09 on Linux. The app uses 5 simultaneous > threads at > the moment. They never share WorkingMemory instances but do > share the > same RuleBase. > > A thread dump (see below) shows all threads being stuck in > java.util.WeakHashMap, which is called from > AbstractRuleBase.addWorkingMemory . > > Has anyone seen this before? I attempted to synchronize the > method > that's the entry point to newWorkingMemory(). That definitely > made the > problem happen less often but didn't solve it completely. > Anyone knows > any other workarounds? > Thanks, > Per > > "CW4" prio=1 tid=0x1a4fd7a8 nid=0xc44 runnable > [0x1a2fe000..0x1a2fefb0] > at > java.util.WeakHashMap.expungeStaleEntries(WeakHashMap.java:289) > at > java.util.WeakHashMap.getTable(WeakHashMap.java:297) > at java.util.WeakHashMap.put(WeakHashMap.java:394) > at > org.drools.common.AbstractRuleBase.addWorkingMemory(Unknown > Source) > at org.drools.reteoo.ReteooRuleBase.newWorkingMemory > (Unknown > Source) > at > org.drools.common.AbstractRuleBase.newWorkingMemory(Unknown > Source) > > "CW3" prio=1 tid=0x1a4fd5f0 nid=0xc43 runnable > [0x1a6fe000..0x1a6fee30] > at java.util.WeakHashMap.put (WeakHashMap.java:397) > at > org.drools.common.AbstractRuleBase.addWorkingMemory(Unknown > Source) > at > org.drools.reteoo.ReteooRuleBase.newWorkingMemory(Unknown > Source) > at org.drools.common.AbstractRuleBase.newWorkingMemory > (Unknown > Source) > > "CW2" prio=1 tid=0x1a4fd100 nid=0xc42 runnable > [0x1a8e5000..0x1a8e5eb0] > at > java.util.WeakHashMap.expungeStaleEntries(WeakHashMap.java:289) > at java.util.WeakHashMap.getTable > (WeakHashMap.java:297) > at java.util.WeakHashMap.put(WeakHashMap.java:394) > at > org.drools.common.AbstractRuleBase.addWorkingMemory(Unknown > Source) > at org.drools.reteoo.ReteooRuleBase.newWorkingMemory > (Unknown > Source) > at > org.drools.common.AbstractRuleBase.newWorkingMemory(Unknown > Source) > > "CW1" prio=1 tid=0x19afca78 nid=0xc41 runnable > [0x1a966000..0x1a967130] > at > java.util.WeakHashMap.expungeStaleEntries > (WeakHashMap.java:289) > at > java.util.WeakHashMap.getTable(WeakHashMap.java:297) > at java.util.WeakHashMap.put(WeakHashMap.java:394) > at > org.drools.common.AbstractRuleBase.addWorkingMemory(Unknown > Source) > at > org.drools.reteoo.ReteooRuleBase.newWorkingMemory(Unknown > Source) > at > org.drools.common.AbstractRuleBase.newWorkingMemory(Unknown > Source) > at > > "CW0" prio=1 tid=0x19afc7d8 nid=0xc40 runnable > [0x1aafe000..0x1aaff1b0] > at > java.util.WeakHashMap.expungeStaleEntries(WeakHashMap.java:289) > at > java.util.WeakHashMap.getTable(WeakHashMap.java:297) > at java.util.WeakHashMap.put(WeakHashMap.java:394) > at > org.drools.common.AbstractRuleBase.addWorkingMemory(Unknown > Source) > at > org.drools.reteoo.ReteooRuleBase.newWorkingMemory(Unknown > Source) > at > org.drools.common.AbstractRuleBase.newWorkingMemory(Unknown > Source) > at > > > --------------------------------------------------------------------- > To unsubscribe from this list please visit: > > http://xircles.codehaus.org/manage_email > > --------------------------------------------------------------------- To unsubscribe from this list please visit: http://xircles.codehaus.org/manage_email
