BIRT Memory leak

Hi everybody,

I testing a web application with Google Web Toolkit and BIRT 3.7.1 API. My application design a view and can make report slideshows which are refresh(means that report are re-generate). My application is deployed on Tomcat 5.5.
Problem occurs because with Windows Task manager, memory use by Tomcat grows continously and at the end report generation failed because there is not enough memory. I have made heap dump using VisualVM and look them, but i don't have any idea about problem.

I have some questions:
- has BIRT 3.7.1 some memory leak problem
- is it a classloader memory leak and how to use classloader for ReportEngine and EngineTask
- shoold i see with Tomcat

Please help me.

Thanks for reply.

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Comments

CBR

Can you post the code that interacts with the report engine api to generate your reports?

bognekadje

thanks cbrell for reply,
In fact i have class which create ReportEngine and that implements Singleton Pattern.
I use following code to create ReportEngine

public static synchronized IReportEngine getReportEngine(ServletContext sc)
throws BirtException {
if (reportEngine == null) {
EngineConfig config = new EngineConfig();
config.setLogConfig(ServerTools.BIRT_LOG_DIRECTORY,
getBIRTLogLevel(ServerTools.BIRT_LOG_LEVEL));
config.setResourcePath(ServerTools.BIRT_RESOURCE_PATH);
config.setLogRollingSize(ServerTools.BIRT_LOG_ROLLING_SIZE);
config.setLogMaxBackupIndex(ServerTools.BIRT_LOG_MAX_BACKUP_INDEX);
config.getAppContext().put(
EngineConstants.APPCONTEXT_CLASSLOADER_KEY,
BirtEngineHelper.class.getClassLoader());
IPlatformContext context = new PlatformServletContext(sc);
config.setPlatformContext(context);
try {
Platform.startup(config);
IReportEngineFactory factory = (IReportEngineFactory) Platform
.createFactoryObject(IReportEngineFactory.EXTENSION_REPORT_ENGINE_FACTORY);
reportEngine = factory.createReportEngine(config);
log.debug("ReportEngine is created.");
} catch (BirtException e) {
log.error("BIRT engine creation failed \n "
+ ServerTools.getStackTraceAsString(e));
throw e;
}
}
return reportEngine;
}

And for each request, i use the single ReportEngine in service to create either IRunTask or IrenderTask and then generate report. for Example this methods use to create rptdocument files

public void createRptdocument(ReportView rv, String locale)
throws NullPointerException, SecurityException,
IllegalArgumentException, BirtException {
IRunTask runTask = null;
IReportDocument reportDocument = null;
try {
File f = new File(rv.getPath());
String path;
if (f.isAbsolute()) {
path = new String(rv.getPath());
} else {
path = ServerTools.DESIGN_FOLDER + rv.getPath();
}
IReportEngine reportEngine = BirtEngineHelper
.getReportEngine(getServletContext());
IReportRunnable reportRun = reportEngine.openReportDesign(path);
runTask = reportEngine.createRunTask(reportRun);
// runTask.getAppContext().put(
// EngineConstants.APPCONTEXT_CLASSLOADER_KEY,
// IRunTask.class.getClassLoader());
setValueRunTaskReport(runTask, rv);
runTask.setLocale(ServerTools.getLocale(locale));
String documentPath = ViewingSessionManager.getInstance()
.getSession(rv.getViewingSessionId()).getDocumentPath();
runTask.run(documentPath);
reportDocument = reportEngine.openReportDocument(documentPath);
rv.setPageCount((int) reportDocument.getPageCount());
} finally {
if (runTask != null) {
runTask.close();
}
if (reportDocument != null) {
reportDocument.close();
}
}
}

thanks for your help!

evgenyak

Did you get any replies regarding leaks in 3.7.1?

Yaytay

I always had problem with memory leaks when using the OSGi report engine, when I switched to the POJO engine I had no further problems.

Jim

evgenyak

I'm using POJO 3.7.1 engine.I wanted to upgrade but I saw that 4.2.2 has memory problems as well.Which version are you using?

Yaytay

I've got 3.7.2 POJO in live and 4.2.2 POJO just waiting for my users to switch over to it. BIRT uses a lot of memory, but I haven't had leaks since I switched to POJO (which I think was 3.7.0). Jim

evgenyak

It is possible also that I'm doing something wrong and confusing between OSGI and POJO. I am putting different BIRT libs under WEB-INF/lib insider my WAR.I was sure I was using POJOHowever, now, I noticed I have a couple of OSGI related jars there. Does it mean I'm doing OSGI?