From: Andargor <andargor(a)yahoo.com&gt; Subject: Re: [rules-users] StackOverflowError when serializing KnowledgeBase To: rules-users(a)lists.jboss.org Date: Thursday, July 22, 2010, 8:12 PM Sorry, forgot to mention, I have tried 5.1.0M1, and yesterday's snapshot. --- On Thu, 7/22/10, Andargor <andargor(a)yahoo.com&gt; wrote: > From: Andargor <andargor(a)yahoo.com&gt; > Subject: StackOverflowError when serializing KnowledgeBase > To: rules-users(a)lists.jboss.org > Date: Thursday, July 22, 2010, 8:10 PM > Hello, > > After adding a few hundred rules, and with the same code, > KnowledgeBase serialization has started to generate > StackOverflowError. I have increased the VM stack size as a > workaround, but I was hoping to implement something more > robust. > > I specifically need to serialize the KnowledgeBase, and not > the session. > > I'm using this code: > >     private void dumpKnowledgeBase(String file, > KnowledgeBase kbase) { >            try { >             >    FileOutputStream ostream = new > FileOutputStream(file); >             >    DroolsObjectOutputStream p = new > DroolsObjectOutputStream(ostream); >             >    p.writeObject(kbase); >             >    p.flush(); >             >    ostream.close(); >            } >            catch > (Exception e) { >             >    System.err.println(e); >             >    e.printStackTrace(); >             >    System.err.println("Could not write > knowledge base "+file); >            } >     } > > > This is due to writeObject recursion? Any ideas? > > A. > > >       >       _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

From: Mark Proctor <mproctor(a)codehaus.org&gt; Subject: Re: [rules-users] StackOverflowError when serializing KnowledgeBase To: rules-users(a)lists.jboss.org Date: Tuesday, July 27, 2010, 11:03 PM   On 27/07/2010 22:36, Andargor wrote: > Second try, sorry for spamming. Does anyone have an idea why serialization of a large knowledge base fails with a stack error? It's to do with Java's poor ability to serialise linked lists: https://jira.jboss.org/browse/JBRULES-2335 https://jira.jboss.org/browse/JBRULES-946 Mark > A. > > --- On Thu, 7/22/10, Andargor&lt;andargor(a)yahoo.com&gt; wrote: > >> From: Andargor&lt;andargor(a)yahoo.com&gt; >> Subject: Re: [rules-users] StackOverflowError when serializing KnowledgeBase >> To: rules-users(a)lists.jboss.org >> Date: Thursday, July 22, 2010, 8:12 PM >> Sorry, forgot to mention, I have >> tried 5.1.0M1, and yesterday's snapshot. >> >> --- On Thu, 7/22/10, Andargor&lt;andargor(a)yahoo.com&gt; >> wrote: >> >>> From: Andargor&lt;andargor(a)yahoo.com&gt; >>> Subject: StackOverflowError when serializing >> KnowledgeBase >>> To: rules-users(a)lists.jboss.org >>> Date: Thursday, July 22, 2010, 8:10 PM >>> Hello, >>> >>> After adding a few hundred rules, and with the same >> code, >>> KnowledgeBase serialization has started to generate >>> StackOverflowError. I have increased the VM stack size >> as a >>> workaround, but I was hoping to implement something >> more >>> robust. >>> >>> I specifically need to serialize the KnowledgeBase, >> and not >>> the session. >>> >>> I'm using this code: >>> >>>      private void dumpKnowledgeBase(String file, >>> KnowledgeBase kbase) { >>>             try { >>>              >>>     FileOutputStream ostream = new >>> FileOutputStream(file); >>>              >>>     DroolsObjectOutputStream p = new >>> DroolsObjectOutputStream(ostream); >>>              >>>     p.writeObject(kbase); >>>              >>>     p.flush(); >>>              >>>     ostream.close(); >>>             } >>>             catch >>> (Exception e) { >>>              >>>     System.err.println(e); >>>              >>>     e.printStackTrace(); >>>              >>>     System.err.println("Could not write >>> knowledge base "+file); >>>             } >>>      } >>> >>> >>> This is due to writeObject recursion? Any ideas? >>> >>> A. >>> >>> >>> >>> >> >>        >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> > > > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > > _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users