Plugin sonarqube for openedge connection problem

Lately i developed a sonaraqube plugin for openedge : I wrote the rules with the language progress 4gl and then I invoked the rules from java using appserver from openedge and it worked when I did a local test (java) but when I install the plugin in sonarqube an error appears

jvm 1 | 2020.08.13 20:48:25 INFO app[][o.s.a.p.ProcessLauncherImpl] Launch process[[key='web', ipcIndex=2, logFilenamePrefix=web]] from [C:\sonarqube-7.3]: C:\Program Files\Java\jdk1.8.0_261\jre\bin\java -Djava.awt.headless=true -Dfile.encoding=UTF-8 -Djava.io.tmpdir=C:\sonarqube-7.3\temp -Xmx512m -Xms128m -XX:+HeapDumpOnOutOfMemoryError -cp ./lib/common/*;C:\sonarqube-7.3\lib\jdbc\h2\h2-1.3.176.jar org.sonar.server.app.WebServer C:\sonarqube-7.3\temp\sq-process2497102236075814669properties
jvm 1 | 2020.08.13 20:48:26 INFO app[][o.s.a.SchedulerImpl] Process [web] is stopped
jvm 1 | 2020.08.13 20:48:26 INFO app[][o.s.a.SchedulerImpl] Process [es] is stopped
jvm 1 | 2020.08.13 20:48:26 INFO app[][o.s.a.SchedulerImpl] SonarQube is stopped
jvm 1 | 2020.08.13 20:48:26 WARN app[][o.e.t.n.Netty4Transport] exception caught on transport layer [[id: 0x066f5f28, L:/127.0.0.1:53117 - R:/127.0.0.1:9009]], closing connection
jvm 1 | java.io.IOException: Une connexion existante a d¹ Ûtre fermÚe par lÆh¶te distant


this is my class conection :

public class ConnectionAppServer {
OpenProcObject opo=null;
OpenAppObject oao=null;
public OpenProcObject connection(String ruleProc) {
try {
this.oao =
OpenEdgeAPSConnector.getOpenAppObjectInstance("AppServerDC://localhost:3090");
} catch (Open4GLException | IOException | InterruptedException e2) {
// TODO Auto-generated catch block
System.out.println("erreur de connection");
}
try {
this.opo = oao.createPO(ruleProc);
} catch (Open4GLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return this.opo;


Does anyone knows why this is happening? I am blocked since weeks on this please help . I start thinking that sonarqube doesn't accept connections inside plugins

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