The problem out of memory in BIRT

DavidBirt

Hi<br />
<br />
In my application,report data is from web service.<br />
Then through java application analysis and transfer data list to report file.<br />
<br />
I put data list into "AppContextValue" as below:<br />
<br />
<strong class='bbc'><br />
request.getSession().setAttribute("AppContextKey", "map");<br />
Map<String,Object> map = (HashMap<String,Object>)request.getSession().getAttribute("AppContextValue");<br />
map.put("list", mylist);<br />
map.put("name", obj.getName());<br />
</strong><br />
<br />
To get it in report design file used as this:<br />
<br />
<strong class='bbc'><br />
dataList = reportContext.getAppContext().get("map").get("list").iterator();<br />
params["hotelName"]=reportContext.getAppContext().get("map").get("name");<br />
</strong><br />
<br />
And fetch this dataList in fetch script function.<br />
The dataList is a very huge.<br />
<br />
When i run this report,system just crashed and report a "Java heap space" OutOfMemoryError message.at that time system run very slowly. How can i do? :wacko: <br />
<br />
Please help me,thanks in advance.

CBR

Hi,

what's your birt version? 2.6 has some serious memory leaks in the ScriptedDataSet plugin code.

I do not clearly understand your problem.
You fetch data from a webservice and store that data in the session object? I would not do that if the data list is very huge (this will cause problems to your server becaue it has to hold that list in memory or serialize it to disc. So each time that user fires a request it will deserialize that list into memory. Things are getting even worse if you do not remove these list but keep adding new ones.

It s quite normal that the system gets really slow when there is no more memory available.
You can try to increase the heap size by starting your application (or the server) with -Xmx1000m
Just replace 1000 with the memory size you want (there is a limit of 2GB for 32 Bit systems).
Another and maybe better approach would be to rethink about your approach.