Calculating minimal value for a group of facts
by kothvandir kothvandir
Hi,
I need to calculate the min time for a set of "jobs" inserted in working
mermory to know wich job is going to be finished first.
Is there any way to obtain within a rule the current facts of some type to
pass then to a function/method?
somethin like this:
Another idea to acomplish this?
gobal MyService myservice
rule "cmdCheckTime" ruleflow-group "comprobarExistencias"
when
Job(time = eval(myService.getMinTime( <jobs in working memory >))
then
go, go, go...
end
Thank you
16 years, 10 months
Drools-flowlification of an application
by Ista Pouss
Hi,
I have an application swing / JCR mecanism.
I should want put some Drool / Flow functions for existant datas. I'm
a total newbee. Flow is good for my ends users and for my code,I hope.
How can I transform some POJO object, and some JCR datas, to enabled
drools flow ?
Thanks.
16 years, 10 months
Not conditional 'not' for event streams?
by Barry Kaplan
I'm trying to formulate a condition like:
$se : StartEvent()
from entry-point "stream"
$fe : FinishedEvent(exchangeId == $se.exchangeId, this after[0s,30s] $se)
from entry-point "stream"
not AbortedEvent(exchangeId == $se.exchangeId, this after[0s,30s] $se)
from entry-point "stream"
A compile error is issued due to the use of 'not' on the last clause. Is
this not supported? Is there another way to obtain this behavior.
Even this simple clause is not value:
not AbortedEvent() from entry-point "stream"
----
The corresponding esper for this would be something like:
select * from pattern [every s=StartEvent ->
(f=FinishedEvent(exchangeId = s.echangeId) where timer:within(30
sec)
and not AbortedEvent(exchangeId = s.echangeId) where
timer:within(30 sec)]
--
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16 years, 10 months
Why this rule did't work?
by zgbigman
I'm trying to formulate a condition like:
package com.sample
import org.hibernate.Session;
import com.sample.entity.TempEntity;
global java.util.List myGlobalList;
rule "Hello World"
when
$hibernateSession : Session();
$tmp1 :TempEntity($bin1 :bin) from $hibernateSession.createQuery("from
TempEntity").list()
$tmp2 : TempEntity($bin2 : bin) from myGlobalList
//eval($bin == ((TempEntity)(myGlobalList.get(0))).getBin())
eval($bin1 == $bin2)
then
System.out.println("success");
end
I'm trying to find an Entity by bin from DB.
there is only one entity in the "myGlobalList". NO complie error but it
shows the following:
log4j:WARN No appenders could be found for logger
(org.hibernate.cfg.Environment).
log4j:WARN Please initialize the log4j system properly.
Hibernate:
select
tempentity0_.bin as bin0_,
tempentity0_.bank_name as bank2_0_,
tempentity0_.bank_id as bank3_0_,
tempentity0_.card_name as card4_0_,
tempentity0_.card_length as card5_0_,
tempentity0_.card_type as card6_0_
from
bin tempentity0_
what should I do if i want this rule works?
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16 years, 10 months
Behavioral differences between session.insert() and entryPoint.insert()?
by Barry Kaplan
I am seeing different behavior whether I insert events directly into session
or into a named entry-point.
The below rule and test is greenbar'ed:
----
rule "How_do_I_correlate_events_arriving_in_2_or_more_streams?"
when
$e : WithdrawalEvent($accountNumber : accountNumber, $amount : amount)
over window:time(30s)
from entry-point "stream"
$f : FraudWarningEvent(accountNumber == $accountNumber) over
window:time(30s)
from entry-point "stream"
then
results.put("accountNumber", $accountNumber);
results.put("amount", $amount);
end
----
def insert(fact) {
session.getWorkingMemoryEntryPoint("stream").insert(fact)
}
@Test
def void How_do_I_correlate_events_arriving_in_2_or_more_streams() {
// Not the same account
insert new WithdrawalEvent(accountNumber: "AAA", amount: 100)
insert new FraudWarningEvent(accountNumber: "BBB")
fireAllRules()
assert results.isEmpty()
// Not within the 30s window
advanceTime 31, SECONDS
insert new FraudWarningEvent(accountNumber: "AAA")
fireAllRules()
assert results.isEmpty()
....
}
----
But if I do not specify a stream in the rules (ie, remove the 'from
entry-point "stream"') and instead insert directly into the session (like
many of the the drools integration do)...
def insert(fact) {
session.insert(fact)
}
...the test fails. It does not matter how far I advance the clock before
inserting the (second) FraudWarningEvent, the rule always fires.
I only found this difference after looking at the integration tests and
seing that I did not need to use a named entry-point for events. Did I
understand incorrectly? (I was looking at
/drools-compiler/src/test/resources/org/drools/integrationtests/test_CEP_DelayingNot.drl
and its associated java test.)
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16 years, 10 months
Share 'declare' by adding drl to KnowledgeBuilder?
by Barry Kaplan
I have a drl that only contains a declare statement. When I load a drl
containing rules I also load that drl. But when the rule executes I get an
error which is the same as if I didn't have the declare.
When I debug and check the PackageDescr for the drl containing the 'declare'
the TypeDeclarationDescr is in the package and seems to have the correct
values.
Both the rule and the drl with the 'declare' are in the same package:
declartions.drl:
-----------
package memelet.droolsesper
import memelet.droolsesper.MarketDataEvent
declare MarketDataEvent
@role(event)
@expires(10s)
end
-----------
rule.drl:
-----------
package memelet.droolsesper
import memelet.droolsesper.ArrivalRate
global ArrivalRate arrivalRate
rule "How do I measure the rate of arrival of events in a given time
period?"
/*
select count(*) as cnt from MarketDataEvent.win:time_batch(1 second)
*/
/*
5.0.1 does not support 'time_batch', so the best we can do is capture the
continous count.
*/
when
$rate : Long() from accumulate (
$e: MarketDataEvent() over window:time(1s) from entry-point
"stream", count($e))
then
arrivalRate.value = $rate;
end
-----------
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16 years, 10 months
Looking for guidance / approach to porting a question graph to Drools
by tim fulcher
Hi
Making no bones about it, this is a broad topic request and I've got
little hands-on Drools experience, just looking for some pointers on a
potential Drools approach, feedback appreciated.
Background:
We have a system which asks online users questions to diagnose an
issue (the problem domain isn't important right now).
The questions are structured in a tree/graph such that one question
leads to another until a conclusion - not exactly rocketscience to
this list I suspect! Any question will have n outputs (defined in
configuration); each output is mapped to an option in an HTML
select/radio button.
The key issue though is that this question flow is all running in the
browser, by reading in an XML configuration and parsing this in
javascript. Instead I need this executing server side, i.e. in a rule
engine. One reason is that increasingly questions are being automated
- currently we make an ajax call which decides upon the outcome to
select and therefore move onto the next. This is however a little
clunky at present.
I see Drools as a potential execution engine for our reworked system,
running rules until needing a manual question to be asked, and
triggering question display in a page. Upon the answer the flow
continues in that fashion until a conclusion is reached.
Specific queries:
We have a legacy stack of question flows, how to adapt them into a
syntax amenable to Drools? Can I do this at runtime?
( Our question graphs could be accessed via database access or in an
XML format )
Given many questions have >2 outcomes, I assume each question-answer
permutation would be a rule?
Does every question have to be mapped to a bean to become a fact to
operate on? Given our questions are of a few broad types
(boolean,numeric,select one) is that all I need to model?
In our current setup a user could decide to re-answer an earlier
question and therefore take an alternate route. What would be the
equivalent in Drools?
If this is viable, will I need 1 rule outcome to pose a question and
another to operate on the outcome, i.e. will the rules fire up
to/including the decision to ask a question, then when an answer fact
is injected into working memory the rules will fire from that point
onwards?
Thanks
A:E
16 years, 10 months
clock.advanceTime behaviour?
by Barry Kaplan
I've been using esper for some time with great success. But the appeal of
having integrated rules is overwhelming. To get familiar with Fusion, I'm
trying to implement the esper patterns, yet I and am stuck on the very first
one:
How do I measure the rate of arrival of events in a given time period?"
-> "select count(*) as cnt from MarketDataEvent.win:time_batch(1 second)"
For now I'm just trying to get my rule to fire at all, so its not really
trying to count just trigger when the number events in the window exceeds a
certain number. (But I admit, I'm not sure how to just the get running count
over the window, so if anybody knows...):
declare MarketDataEvent
@role(event)
end
rule "How do I measure the rate of arrival of events in a given time
period?"
when
$count : Long( longValue > 5) from accumulate (
$e: MarketDataEvent() over window:time(1s) from entry-point
"stream", count($e))
then
System.out.println("***** > 5");
end
My test driver is just inserting events every 10ms:
(1..10).each {
drools.clock.advanceTime(10, TimeUnit.MILLISECONDS)
drools.entryPoint.insert(new MarketDataEvent(it as String))
drools.session.fireAllRules()
}
If I do /not/ advance the clock, then I rule fires each time after the 5th
insert. But if the clock /is/ advanced (at any increment) then the rule
never fires.
Any clues what I might be missing?
thanks!
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16 years, 10 months
Re: [rules-users] unable to determine value type class *** URGENT***
by twyt88
hi Crhis,
What's the PMR for this ticket. We have the exact same problem, and I want
to quote IBM for this.
Regards
TT
Crhis wrote:
>
> Had similar (same?) issue with WAS ND 6.1.0.23 (Fixpack 23) which uses 32
> bit Java 5 SR9 build. A nested exception ending with
> "org.drools.RuntimeDroolsException: unable to determine ValueType for
> Class ...". Worked extensively with support on this and it appears SR9
> has a defect with the JIT compiler that precipitates this. There are 3
> ways to address it: Move back to SR8. Wait for SR10 to come out. Work
> with IBM support under your support contract to possibly receive a patch
> specific to your environment.
>
>
>
> Srithu wrote:
>>
>> I have a wired behavior..
>>
>> I have a set of rules and i have used drools-guvnor to packaging them...
>> It is working in windows machines where i have jboss which is running on
>> IBM java 5 and 6..
>>
>> When i connect the same from jboss Which is running on 64 bit IBM java 6
>> on linux is not working...
>> The same is working If i used 64 bit IBM java 5 on linux.....
>>
>>
>> I getting following exception...
>>
>>
>>
>> Please help....
>>
>>>> [2009-02-11 12:30:29,697] [705980] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - org.drools.RuntimeDroolsException: unable to determine
>>>> ValueType for Class [class java.lang.Object]
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> org.drools.base.ValueType.determineValueType(ValueType.java:193)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> org.drools.base.ValueType.readResolve(ValueType.java:125)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> sun.reflect.GeneratedMethodAccessor121.invoke(Unknown Source)
>>
>>>> [2009 -02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12]
>>>> [ERROR] [STDERR ] - at
>>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at java.lang.reflect.Method.invoke(Method.java:599)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectStreamClass.invokeReadResolve(ObjectStreamClass.java:1072)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1773)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1340)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readObject(ObjectInputStream.java:362)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> org.drools.base.BaseEvaluator.readExternal(BaseEvaluator.java:54)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1803)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1762)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1340)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readObject(ObjectInputStream.java:362)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> org.drools.rule.LiteralRestriction.readExternal(LiteralRestriction.java:66)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1803)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1762)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1340)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readObject(ObjectInputStream.java:362)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> org.drools.rule.LiteralConstraint.readExternal(LiteralConstraint.java:67)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1803)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1762)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1340)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readObject(ObjectInputStream.java:362)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.util.ArrayList.readObject(ArrayList.java:717)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> sun.reflect.GeneratedMethodAccessor107.invoke(Unknown Source)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at java.lang.reflect.Method.invoke(Method.java:599)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:985)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1860)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1764)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1340)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readObject(ObjectInputStream.java:362)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> org.drools.rule.Pattern.readExternal(Pattern.java:115)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1803)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1762)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1340)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readObject(ObjectInputStream.java:362)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> org.drools.rule.Declaration.readExternal(Declaration.java:175)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1803)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1762)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1340)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readArray(ObjectInputStream.java:1678)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1334)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readObject(ObjectInputStream.java:362)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> org.drools.base.mvel.MVELCompilationUnit.readExternal(MVELCompilationUnit.java:166)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1803)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1762)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1340)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readObject(ObjectInputStream.java:362)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> org.drools.base.mvel.MVELPredicateExpression.readExternal(MVELPredicateExpression.java:38)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1803)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1762)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1340)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readObject(ObjectInputStream.java:362)
>>
>>>> [2009-02-11 12:30:29,698] [705981] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> org.drools.rule.PredicateConstraint.readExternal(PredicateConstraint.java:131)
>>
>>>> [2009-02-11 12:30:29,699] [705982] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1803)
>>
>>>> [2009-02-11 12:30:29,699] [705982] [http-0.0.0.0-8080-12] [ERROR]
>>>> [STDERR ] - at
>>>> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1762)
>>
>>
>>
>>
>>
>
>
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16 years, 10 months
