[jboss-jira] [JBoss JIRA] (DROOLS-1014) Drools OOM when loading session

[Artur Kronenberg (JIRA)]

    [ https://issues.jboss.org/browse/DROOLS-1014?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13143742#comment-13143742 ] 

Artur Kronenberg commented on DROOLS-1014:
------------------------------------------

And me again, soz ...

I wrote up a standalone example for you, and I saw some interesting stuff. I don't know if that is a bug, or if that is known behaviour. I'd love an explanation if you could :) 

Basically the example simulates my problem: 

2 event classes
2 rules
2 Entry Points (one per rule) 

First event attempts to insert 1000 users. The outcome is interesting: 

1. WITH Entry Points for the second rule: 
* It runs and tries to persist
* It gets increasingly slow
* It requires a LOT of memory (had to up package size to 128 MB and still could not persist the session)
* It eventually bombs out with an exception, never finishes, never succeeds 

2. WITHOUT Entrypoint for the second rule
* Everything runs smoothly
* All is executed and inserted in 139 ms 
* No errors

I assume this can not be intended? Something is wrong in the way entrypoints are handled when serializing the session information I believe. 

Let me know if you need more help reproducing etc. 

Artur

> Drools OOM when loading session
> -------------------------------
>
>                 Key: DROOLS-1014
>                 URL: https://issues.jboss.org/browse/DROOLS-1014
>             Project: Drools
>          Issue Type: Bug
>          Components: core engine
>    Affects Versions: 6.3.0.Final
>         Environment: Mac OS 10.10.5, Eclipse Mars Release, Java 1.8, Drools 6.3.0.Final
>            Reporter: Artur Kronenberg
>            Assignee: Mario Fusco
>            Priority: Critical
>         Attachments: test-standalone.zip
>
>
> I ran into an issue loading the session from my JPA.
> I am getting this stacktrace:
> http://pastebin.com/PMKpdBWM
> This is happening for this rule: 
> http://pastebin.com/HZmLmsEH
> And this module:
> http://pastebin.com/2Q6k73tC
> What I am doing is: 
> 1. Create a new session
> 2. Insert an ApplicationEvent 
> 3. fireAllRules
> 4. Reload -> OOM 
> The ApplicationEvent has a list of 6345 facts in there. I load them from a CSV file, and use drools to insert them into my knowledge base as facts. 
> When I restart my server and have the session reloaded, it ooms when trying to deserialize the session. 
> I am still looking for a workaround. I am not sure what is happening and could not find any more info at this point.
> I am using:
> JPA + Hibernate 4.2.21.Final
> org.codehaus.btm:btm:2.1.4 as a standalone JTA platform 
> Let me know if there's any other info needed.
> Thanks,
> Artur



--
This message was sent by Atlassian JIRA
(v6.4.11#64026)