[rules-users] permgen error for simple rule stress test

[Mark Proctor]

permien issus were fixed in the 5.6 release, and 6.0 release, by Davide Sottara.

Mark
On 28 Jan 2014, at 21:05, anjana.ackroyd <anjana.ackroyd at gmail.com> wrote:

> We are running a simple stress test (whose code I will paste below) for a
> numbercompare rule file)
> We get the following error before the test finishes. Which seems odd for one
> rule
> javax.servlet.ServletException: java.lang.OutOfMemoryError: PermGen space
> 
> This test is run against 3 loablanced tomcat servers 
> 
> 
> Here is my JVM_OPTS for each of those tomcat 
> JVM_OPTS="-Xms4096m -Xmx4096m -XX:NewSize=2048m -XX:PermSize=512m
> -XX:MaxPermSize=512m -Xss1024K -XX:+UseCodeCacheFlushing
> -XX:-UseSplitVerifier"
> 
> Here is 
> 
> I have a simple rule file deployed on guvnor on my abc with JVM_OPTS on the
> guvnor being
> JVM_OPTS="-Xms4096m -Xmx4096m -XX:NewSize=2048m -XX:PermSize=512m
> -XX:MaxPermSize=512m -Xss1024K 
> 
> 
> 
> 
> Here is my stress test that we are running
> 
> package DroolsTest;
> import java.io.BufferedReader;
> import java.io.InputStream;
> import java.io.InputStreamReader;
> import java.net.HttpURLConnection;
> import java.net.URL;
> 
> import confident.guppy.tools.Caller;
> 
> public class DroolsSpeedTest {
> 
>                public static void main(String[] args) {
>                                HttpURLConnection httpURLConnection = null;
>                                InputStream inputStream = null;
>                                BufferedReader bufferedReader = null;
> 
>                                long t1 = System.currentTimeMillis();
>                                for (int i = 0; i < 10000; i++) {
>                                                try {
>                                                                long start =
> System.currentTimeMillis();
>                                                                // Three
> boxes
>                                                                String url =
> "https://abc-uat2.xyz.com/ces/v2.0/rules/10/compare/10";
> 
> 
> 
> 
> httpURLConnection = (HttpURLConnection) ( new URL(url).openConnection());
> 
>                                                                if
> (httpURLConnection != null) {
> 
> inputStream = httpURLConnection.getInputStream();
> 
> bufferedReader = new BufferedReader(new InputStreamReader(
> 
> inputStream));
> 
> String results = "";
> 
> String info = "";
> 
> while ((info = bufferedReader.readLine()) != null) {
> 
> results += info;
> 
> }
> 
> //caller.log(results);
>                                                                } else {
> 
> System.out.println("Unable to create the HTTP connection with the required
> server...");
>                                                                }
> 
>                                                                if (i % 20
> == 0 && i != 0 ) {
> 
> System.out.println(" passing " + i + "     ms " + (
> System.currentTimeMillis() - start ));
>                                                                }
> 
>                                                } catch (Exception boom) {
> 
> boom.printStackTrace();
> 
> System.out.println("It died on the " + i + " attempt because " +
> boom.getMessage());
>                                                }
>                                }
>                                long t2 = System.currentTimeMillis() - t1 ;
>                                System.out.println("I took ms : "+  t2 );
>                }
> }
> 
> 
> 
> 
> Here is my rules defined on guvnor 
> 
> 
> 
> package org.numbercompare;
> declare NumberCompare
>    message : String
>    numberone: Integer
>    numbertwo: Integer
> end
> 
> rule "numberone is equals to numbertwo"
> 
>    when
>        n: NumberCompare(numberone == numbertwo);
> 
>    then
>        n.setMessage("numberone is equals to numbertwo");
> 
> end
> 
> rule "numberone is greater than numbertwo"
>    when
>        n: NumberCompare(numberone > numbertwo);
> 
>    then
>        n.setMessage("numberone is greater than numbertwo");
> end
> 
> rule "numberone is less than numbertwo"
>    when
>        n: NumberCompare(numberone < numbertwo);
> 
>    then
>        n.setMessage("numberone is less than numbertwo");
> 
> end
> 
> 
> Here is my code that updates the rule file
> 
> 
> 
>    public KnowledgeBase readKnowledgeBase() throws Exception {
>         ResourceFactory.getResourceChangeNotifierService().start();
>        ResourceFactory.getResourceChangeScannerService().start();
>        ResourceChangeScannerConfiguration sconf =
> ResourceFactory.getResourceChangeScannerService().newResourceChangeScannerConfiguration();
>        sconf.setProperty("drools.resource.scanner.interval", "2");
>        ResourceFactory.getResourceChangeScannerService().configure(sconf);
>        KnowledgeAgentConfiguration kaconf =
> KnowledgeAgentFactory.newKnowledgeAgentConfiguration();
>        kaconf.setProperty("drools.agent.scanDirectories", "true");
>        kaconf.setProperty("drools.agent.scanResources", "true");
>        kaconf.setProperty("drools.agent.newInstance", "false");
>        KnowledgeAgent kagent =
> KnowledgeAgentFactory.newKnowledgeAgent("CS", kaconf);
> 
> kagent.applyChangeSet(ResourceFactory.newClassPathResource("ChangeSet.xml"));
>        KnowledgeBase kbase = kagent.getKnowledgeBase();
> 
>        return kbase;
>    }
> 
>    @Override
>    public DroolsDTO getDroolsDTO(int numberone, int numbertwo) throws
> Exception {
>        DroolsDTO droolsDTO = new DroolsDTO();
>        KnowledgeBase kb = readKnowledgeBase();
>        FactType factType = kb.getFactType("org.numbercompare",
> "NumberCompare");
>        Object nc = factType.newInstance();
>        factType.set(nc, "numberone", numberone);
>        factType.set(nc, "numbertwo", numbertwo);
>        StatefulKnowledgeSession ksession =
> kb.newStatefulKnowledgeSession();
>        ksession.insert(nc);
>        ksession.fireAllRules();
>        ksession.dispose();
>        droolsDTO.setMessage(factType.get(nc, "message").toString());
>        return droolsDTO;
>    }
> 
> 
> My changeset.xml
> <change-set xmlns='http://drools.org/drools-5.0/change-set'
>    xmlns:xs='http://www.w3.org/2001/XMLSchema-instance'
>    xs:schemaLocation='http://drools.org/drools-5.0/change-set
> http://anonsvn.jboss.org/repos/labs/labs/jbossrules/trunk/drools-api/src/main/resources/change-set-1.0.0.xsd'
>> 
>    <add>
>         <resource
> source='http://abc:8082/guvnor/org.drools.guvnor.Guvnor/package/org.numbercompare/LATEST'
> type='PKG' basicAuthentication="enabled" username="admin" password="admin"/>
>    </add>
> </change-set>
> 
> 
> 
> 
> 
> 
> 
> Also in the guvnor logs during the test I see 
> , I see thousands of these: WARN 28-01 11:50:55,551
> (RulesRepositoryManager.java:getRulesRepository:70) Creating RulesRepository
> with default username. =============== session-guest-864931
> and the session-guest numbers keep climbing.
> and admin user logging in about every second.
> 
> 
> 
> 
> --
> View this message in context: http://drools.46999.n3.nabble.com/permgen-error-for-simple-rule-stress-test-tp4027895.html
> Sent from the Drools: User forum mailing list archive at Nabble.com.
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