[mapserver-users] java mapscript + postgis = jvm crashed (SOLVED)

[Ludovico Bianchini]

I've upgraded to ms4w 2.3.0, it's solved the "crashing" problem.

Another question: could I still use Postgres 8.1 + postgis 1.3.2 ? Have 
I to upgrade database too?
(I don't see in the map the layer from postgis, but it could be a 
problem in my code or shape file or db data).

Thanks.

Ludovico

Umberto Nicoletti ha scritto:
> On Tue, Sep 23, 2008 at 10:50 PM, Ludovico Bianchini <metlud at yahoo.it> wrote:
>   
>> Umberto Nicoletti ha scritto:
>>     
>>> I am using postgis layers (on Linux, though) and it works fine.
>>>
>>> Do you share the same mapObj between threads (in application scope) or
>>> multiple requests (in session scope)?
>>> mapscript is safe only when a new mapObj is created for each request.
>>> What other kind of layers do you have in your map?
>>>
>>> Umberto
>>>
>>>
>>> On Mon, Sep 22, 2008 at 10:34 PM, Ludovico Bianchini <metlud at yahoo.it>
>>> wrote:
>>>
>>>       
>>>> - Windows Vista Home Premium
>>>> - Postgres 8.1
>>>> - jvm 1.6.0
>>>> - jboss 4.0.3SP1, tomcat 5.5
>>>> - struts2
>>>> - ms4w 2.2.3 (mapscript.jar, mapscript.dll, all other dlls taken from
>>>> this pack)
>>>> - postgresql-8.2-505.jdbc4.jar
>>>>
>>>> mapscript.jar is placed in
>>>> C:\jboss-4.0.3SP1\server\default\deploy\jbossweb-tomcat55.sar
>>>>
>>>> When a layer with a postgis connection is turned on, the draw method
>>>> crashes the jvm.
>>>>
>>>> Error file attached.
>>>>
>>>> Is there any solution to this problem?
>>>>
>>>> Postgis is listed in "unsafe components", i have not understood if there
>>>> is one way to make it work using thread syncronization.
>>>>
>>>> Thanks in advance for any help.
>>>>
>>>> Ludovico
>>>>
>>>>
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>>>>
>>>>         
>>>
>>>       
>> I think I do not share the same object between request.
>>
>> The other layer are shape file layer, they work fine (zoom ok, pan ok).
>>
>> <struts><!-- Configuration for the default package. -->
>>   <package name="default" extends="struts-default">
>>        .
>>    .
>>    .
>>       <action name="Mappa*" class="segnaletica.action.MappaAction"
>> method="{1}">
>>           <result>/jsp/mappa.jsp</result>
>>    .
>>    .
>>    .
>>       </action>
>>   </package>
>> </struts>
>>
>> public class MappaAction extends ActionSupport implements
>> ServletRequestAware{
>>     
>
> Are you sharing any mapscript object as an Action attribute? If yes
> that's probably the culprit, otherwis it seems pretty strange...
> Does the crash occur only when more than user is accessing the map or
> even when there is only one user?
>
> Also ms4w 2.2.3 seems prett old, why don't you upgrade to the latest?
>
> Umberto
>
>   
>>   .
>>   .//attributes
>>   .
>>   .
>> public String execute() throws Exception {
>>             mapObj mapObj_o = new
>> mapObj("C:\\jboss-4.0.3sp1_map\\map\\treviso.map");//create a new mapObj
>> object
>>             if(OP == null) OP = "-1";
>>             int op = Integer.parseInt(OP);
>>       switch (op) {
>>       case Z_IN: zoomIn(mapObj_o);
>>                     break;
>>       case Z_OUT: zoomOut(mapObj_o);
>>                     break;
>>       case PAN: pan(mapObj_o);
>>             break;
>>       case REFRESH: refresh(mapObj_o);
>>             break;
>>
>>       default: fullExtent(mapObj_o);
>>           break;
>>       }
>>       return SUCCESS;
>>   }
>>   .
>>   .//utility methods, map navigation methods
>>   .
>>
>> private void draw(mapObj mapObj_o){
>>       .
>>       .
>>       mapImageObj = mapObj_o.draw();//this instruction crashes the JVM
>>       .
>>       .
>>   }
>>
>> }
>>
>> ########################################################
>> ####                            LAYER SEGNALETICA
>> ####
>> ########################################################
>>
>>   LAYER
>>       NAME "segnaletica"
>>       STATUS OFF
>>       TYPE POINT
>>       TRANSFORM false
>>       POSTLABELCACHE true
>>       CONNECTION "user=user password=password dbname=dbname host=localhost
>> port=5432"
>>       CONNECTIONTYPE postgis
>>       DATA "posizionegeoref from rilievi.impianti"       CLASS
>>           STYLE
>>               COLOR 255 99 0
>>               SYMBOL "circle"
>>               SIZE 12
>>           END
>>       END
>>       PROJECTION
>>           "init=epsg:4326"
>>       END
>>   END
>>
>> Ludovico
>> Chiacchiera con i tuoi amici in tempo reale!
>> http://it.yahoo.com/mail_it/foot/*http://it.messenger.yahoo.com
>>
>>     
>
>
>   

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