[jboss-jira] [JBoss JIRA] (DROOLS-2409) Memory Leak in sliding window

[Srinivas ev (JIRA)]

    [ https://issues.jboss.org/browse/DROOLS-2409?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13635056#comment-13635056 ] 

Srinivas ev edited comment on DROOLS-2409 at 9/18/18 9:36 AM:
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Hi Mario,

For your comment - 
>> The problem there is that inserting events in a so tight loop has the effect of overwhelming the engine not giving it a chance of getting any job done.

I have a similar case where in my application, the load may go up to 100 events per second and there will be a possibility of getting the same load for long hours. As per your statement regarding overwhelming the engine, the engine may fail to execute the rules for incoming events or eviction.

What solutions I can assume for this problem. When I did the experiment last time for my project, I observed drools engine at some stage(when the number of events in drools stateful session crossed ~20 lakh) consuming all the events into it without performing any operation regarding rule evaluations/persistence timers execution( for example). 

I can share the reproducer in case needed. Thanks,


was (Author: ev.srinivas):
Hi Mario,

For your comment - 
>> The problem there is that inserting events in a so tight loop has the effect of overwhelming the engine not giving it a chance of getting any job done.

I have a similar case where in my application, the load may go up to 100 events per second and there will be a possibility of getting the same load for long hours. As per your statement regarding overwhelming the engine, the engine may fail to execute the rules for incoming events or eviction.

What solutions I can assume for this problem. When I did the experiment last time for my project, I observed drools engine consuming all the events into it without performing any operation regarding rule evaluations/persistence timers execution( for example). 

I can share the reproducer in case needed. Thanks,

> Memory Leak in sliding window
> -----------------------------
>
>                 Key: DROOLS-2409
>                 URL: https://issues.jboss.org/browse/DROOLS-2409
>             Project: Drools
>          Issue Type: Feature Request
>          Components: core engine
>    Affects Versions: 7.6.0.Final
>         Environment: Mac with Java 1.8 using Spring Boot (see attached demo project)
>            Reporter: Mike Baranski
>            Assignee: Mario Fusco
>            Priority: Critical
>         Attachments: complete.tar.gz
>
>
> See attached project.
> `gradle test` causes an out of memory exception on my machine after ~2.6 million events.  Events should be released for GC after 1 second, but that does not appear to be happening.



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