[rules-users] Entry point stream OutOfMemoryError?

[Wolfgang Laun]

Increase the heap memory, see java options such as -Xmsn and -Xmxn. See your
system's documentation on java.

Do you really have to have all CashFlow objects in WorkingMemory at the same
time? Consider processing your "huge file" in sections.

You probably don't have to have a different Date value for each of your
CashFlow transactions; the way you do it, they won't differ much anyway. Use
a single shared Date object for all CashFlow objects.

-W

2010/10/4 Aman <boy18nj at gmail.com>

>  Based upon what I understood from Drools fusion documentation, entry
> point stream can source data from file stream, so it could process data in
> GB’s. Believe me this is not what I found, to my surprise I found out I got
> –
>
>
>
> Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
>
>       at java.util.GregorianCalendar.computeFields(*
> GregorianCalendar.java:2020*)
>
>       at java.util.GregorianCalendar.computeFields(*
> GregorianCalendar.java:1996*)
>
>       at java.util.Calendar.setTimeInMillis(*Calendar.java:1109*)
>
>       at java.util.GregorianCalendar.<init>(*GregorianCalendar.java:576*)
>
>       at java.util.Calendar.createCalendar(*Calendar.java:1011*)
>
>       at java.util.Calendar.getInstance(*Calendar.java:948*)
>
>       at CashFlowTest.main(*CashFlowTest.java:66*)
>
>
>
>
>
> I am reading a huge file in while loop, inside this loop object is being
> constructed and inserted into entry point stream. Before even rules would
> start firing, it goes straight into exception.
>
> Like below-
>
>
>
>
>
>             *while* ((readLine = bufferedReader.readLine()) != *null*) {
>
>                   String transactionType = readLine.substring(13, 14);
>
>                   String amount = readLine.substring(9, 12);
>
>                   *if* ("C".equals(transactionType)) {
>
>                         CashFlow wCashFlow = *new* CashFlow(Calendar.*
> getInstance*()
>
>                                     .getTime(), Double.*valueOf*(amount),
> *CREDIT*, 1);
>
>                          memoryEntryPoint.insert(wCashFlow);
>
>                   } *else* {
>
>                         CashFlow *wCashFlow* = *new* CashFlow(Calendar.*
> getInstance*()
>
>                                     .getTime(), Double.*valueOf*(amount),
> *DEBIT*, 1);
>
>                   }
>
>             }
>
>
>
>
>
> Unless I am doing something wrong here, I conclude it entry stream cannot
> source GB data?
>
> *From:* Aman [mailto:boy18nj at gmail.com]
> *Sent:* Sunday, October 03, 2010 10:06 PM
> *To:* 'Rules Users List'
> *Subject:* RE: [rules-users] WorkingMemoryEntryPoint NullpointerException?
>
>
>
> Now I am using it. Thanks
>
>
>
> *From:* rules-users-bounces at lists.jboss.org [mailto:
> rules-users-bounces at lists.jboss.org] *On Behalf Of *Leandro Romero
> *Sent:* Sunday, October 03, 2010 10:02 PM
> *To:* Rules Users List
> *Subject:* Re: [rules-users] WorkingMemoryEntryPoint NullpointerException?
>
>
>
> Are you using that entry-point in your rules? That might be the problem.
>
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