Drools consuming a lot of memory for short lived objects thus impacting average response time.
by manohars
Hello,
We are using Drools 5.3.0 Final distribution using decision tables(.pkg rule
files) in our solution. However, Drools is taking a lot of memory (@ 350 mb
on Linux-64bit).
On profiling,we realize that huge number of short lived objects are getting
created.(org.drools.impl.StatefulKnowledgeSessionImpl, IndexVariableResolver
class and org.mvel2.* classes). It leads increase in Garbage Collection
cycles there by leaving an impact on average response time.
Is there any clever way to use Drools to achieve @ 1 millisecond to 2
millisecond response time given the rules are simple? We tried to use drl
based rules but no improvement.
Any idea about how to deal with this such a big memory contributors ?
Regards,
Manohar
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13 years, 1 month
java.lang.LinkageError, but only sometimes
by kennywest
Dear list,
We have an application (A) deployed on JBoss 7.1.1 accepting commands (CQRS,
but only C and Q :) ). A console application (B) is sending a large volume
of commands to create entities in A. Entities in A are validated by Drools
(plain drl files, configured in spring using drools-spring). Most of the
time this works just fine. But sometimes, we get the following exception:
java.lang.LinkageError: loader (instance of
org/drools/rule/JavaDialectRuntimeData$PackageClassLoader): attempted
duplicate class definition for name:
"a/b/c/Rule_person_unique___name_656ee3db19d34e689d95e2d6b2be67b6"
at java.lang.ClassLoader.defineClass1(Native Method) [rt.jar:1.6.0_30]
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
[rt.jar:1.6.0_30]
at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
[rt.jar:1.6.0_30]
at
org.drools.rule.JavaDialectRuntimeData$PackageClassLoader.fastFindClass(JavaDialectRuntimeData.java:615)
[drools-core-5.4.0.Final.jar:5.4.0.Final]
at
org.drools.util.CompositeClassLoader$CachingLoader.load(CompositeClassLoader.java:254)
[knowledge-api-5.4.0.Final.jar:5.4.0.Final]
at
org.drools.util.CompositeClassLoader$CachingLoader.load(CompositeClassLoader.java:237)
[knowledge-api-5.4.0.Final.jar:5.4.0.Final]
at
org.drools.util.CompositeClassLoader.loadClass(CompositeClassLoader.java:88)
[knowledge-api-5.4.0.Final.jar:5.4.0.Final]
at java.lang.ClassLoader.loadClass(ClassLoader.java:295) [rt.jar:1.6.0_30]
at java.lang.ClassLoader.loadClass(ClassLoader.java:247) [rt.jar:1.6.0_30]
at
a.b.c.Rule_gg___unique___name_656ee3db19d34e689d95e2d6b2be67b6Eval0InvokerGenerated.evaluate(Unknown
Source)
at
a.b.c.Rule_gg___unique___name_656ee3db19d34e689d95e2d6b2be67b6Eval0Invoker.evaluate(Unknown
Source)
at org.drools.rule.EvalCondition.isAllowed(EvalCondition.java:114)
[drools-core-5.4.0.Final.jar:5.4.0.Final]
Any idea where this is coming from or what's causing this.
We are using:
- JBoss 7.1.1
- drools 5.4.0.Final
- jdk 1.6u30
- Windows 7 64 bit
regards,
Kenneth
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13 years, 1 month
Re: [rules-users] ArrayIndexOutOfBoundsException in MVELCompilationUnit
by Stephen Masters
Actually please ignore. I temporarily upgraded to 5.4 which identified a bug in a DSL. With that fixed, I was able to downgraded again.
Thanks anyway!
Steve
Stephen Masters <stephen.masters(a)me.com> wrote:
>Hi folks,
>
>I seem to have come across an issue with hitting an ArrayIndexOutOfBoundsException:3 during an insert. It seems to depend on how many other facts have already been inserted.
>
>This is on 5.3 Final.
>
>Can anybody give me any pointers on how to diagnose such an issue?
>
>Many thanks
>
>Steve
>_______________________________________________
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>rules-users(a)lists.jboss.org
>https://lists.jboss.org/mailman/listinfo/rules-users
13 years, 1 month
Problem with guvnor db mysql jndi
by Leonardo Soubeste
Hello everyone,
I'm trying to use Guvnor repository with mysql. I'm using JBoss7.
I configured the datasource as jndi resource like this:
<datasource jta="true" jndi-name="java:jboss/datasources/guvnor"
pool-name="guvnor" enabled="true" use-java-context="true" use-ccm="true">
<connection-url>jdbc:mysql://localhost:3306/guvnor</connection-url>
<driver>com.mysql</driver>
<transaction-isolation>TRANSACTION_READ_COMMITTED</transaction-isolation>
<pool>
<min-pool-size>10</min-pool-size>
<max-pool-size>100</max-pool-size>
<prefill>true</prefill>
</pool>
<security>
<user-name>root</user-name>
<password>password</password>
</security>
<statement>
<prepared-statement-cache-size>32</prepared-statement-cache-size>
<share-prepared-statements>true</share-prepared-statements>
</statement>
</datasource>
Now, when I run guvnor I get this exception:
Caused by: java.sql.SQLException: You cannot set autocommit during a managed
transaction!
at
org.jboss.jca.adapters.jdbc.BaseWrapperManagedConnection.setJdbcAutoCommit(BaseWrapperManagedConnection.java:888)
at
org.jboss.jca.adapters.jdbc.WrappedConnection.setAutoCommit(WrappedConnection.java:715)
at
org.apache.jackrabbit.core.util.db.ConnectionHelper.getConnection(ConnectionHelper.java:395)
[jackrabbit-core-2.2.8.jar:2.2.8]
at
org.apache.jackrabbit.core.util.db.ConnectionHelper.reallyExec(ConnectionHelper.java:351)
[jackrabbit-core-2.2.8.jar:2.2.8]
at
org.apache.jackrabbit.core.util.db.ConnectionHelper$3.call(ConnectionHelper.java:339)
[jackrabbit-core-2.2.8.jar:2.2.8]
I think is related to the <transaction-isolation> tag. Any help?
I couldn't find any example of how to configure this. Without using JNDI it
works.
Thanks in advance
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13 years, 1 month
Re: [rules-users] Unable to download the deployment files pointed in the Guvnor documentation pages.
by EvelthonPatrickios＠tsys.com
Drools Guvnor Documentation for PDF points to:
http://docs.jboss.org/drools/release/5.5.0.Final/drools-guvnor-docs/pdf/
drools-guvnor-docs.pdf
where it SHOULD point to:
http://docs.jboss.org/drools/release/5.5.0.Final/drools-guvnor-docs/pdf/
guvnor-docs.pdf
(or change the target file name)
Same is true for some of the previous versions. (5.5.0.CR1, 5.4.0, etc)
Evelthon
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13 years, 1 month
ArrayIndexOutOfBoundsException in MVELCompilationUnit
by Stephen Masters
Hi folks,
I seem to have come across an issue with hitting an ArrayIndexOutOfBoundsException:3 during an insert. It seems to depend on how many other facts have already been inserted.
This is on 5.3 Final.
Can anybody give me any pointers on how to diagnose such an issue?
Many thanks
Steve
13 years, 1 month
Re: [rules-users] Unable to download the deployment files pointed in the Guvnor documentation pages.
by milen igrachev
Hi,
the link still seems broken to me, but the other link you gave me did the trick.
Thanks a lot.
Best Regards,
Milen
-------- Оригинално писмо --------
От: Michael Anstis michael.anstis(a)gmail.com
Относно: Re: [rules-users] Unable to download the deployment files pointed
in the Guvnor documentation pages.
До: Rules Users List
Изпратено на: Сряда, 2012, Ноември 21 12:08:20 EET
I have correct the link in the documentation.
5.4.0.Final can be obtained from
http://download.jboss.org/drools/release/ which is included within the the "Other downloads" section of my original link.
On 21 November 2012 09:57, Michael Anstis
michael.anstis(a)gmail.com > wrote:
Hi,
I appears the download link in the documentation is broken.
You can download from here:
http://www.jboss.org/drools/downloads
With kind regards,
Mike
On 21 November 2012 09:38, milen igrachev
igrachev(a)abv.bg > wrote:
Hi,
Let me first say that I am new to Guvnor, but the functionality which it present seems to be really good and just the thing that I need at the moment.
So I decided to give it a try and see it in action. I began to read the documentation and the "Installation" section in it:
http://docs.jboss.org/drools/release/5.4.0.Final/drools-guvnor-docs/html_... (I am trying to use guvnor-5.4.0)
And there is a link there for deployment files download, which i failed to download since yesterday.
Can you please take a look in it and tell me if the files are moved or if there is a problem with the server they are hosted on?
Big thanks for your support!
Best Regards,
Milen Igrachev
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13 years, 1 month
