axis-java-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Davanum Srinivas (JIRA)" <j...@apache.org>
Subject [jira] Commented: (AXIS2-2968) Out-Of-Memory error on server side - Use of wsdl4j WSDLDefinition
Date Thu, 19 Jul 2007 16:01:06 GMT

    [ https://issues.apache.org/jira/browse/AXIS2-2968?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12513930
] 

Davanum Srinivas commented on AXIS2-2968:
-----------------------------------------

Ann, Both XMLSchema and WSDL4J are holding onto the original DOM node for the schema. In WSDL4J,
there is a SchemaImpl class which is used with the ExtensionRegistry which has a reference
to it. Also the DocumentationElement as well. I wonder if we could store them as strings instead.
In XmlSchema,  XmlSchemaDocumentation and XmlSchemaAppInfo store references, am trying some
local changes to see if we can get rid of them. May involve an API change. Can you please
chase the issue on the wsdl4j side?

thanks,
dims

> Out-Of-Memory error on server side - Use of wsdl4j WSDLDefinition
> -----------------------------------------------------------------
>
>                 Key: AXIS2-2968
>                 URL: https://issues.apache.org/jira/browse/AXIS2-2968
>             Project: Axis 2.0 (Axis2)
>          Issue Type: Bug
>          Components: kernel
>            Reporter: Ann Robinson
>            Assignee: Ann Robinson
>            Priority: Critical
>             Fix For: 1.3
>
>         Attachments: patch_01.txt
>
>
> In some server-side environments, there is an out-of-memory problem when      
> attempting to handle a large number of JAXWS-based web service applications.  
>                                                                               
> In the test scenario that fails, the server is attempting to load and start   
> 100 web service applications. A variety of heap sizes was tried to see if     
> a heap size for the server could be found to work, ranging from 1 GB to 4 GB. 
> Increasing the heap size did not work - the out-of-memory error continued to  
> occur.                                                                        
> In analyzing the java heap dumps, one of the biggest consumers of the memory  
> is with the wsdl4j WSDLDefinition objects.  In the test scenario, the         
> wsdl4j-related objects consumed about a quarter to a third of the entire heap.
>                                                                               
> The WSDLDefinition object is a very heavy-weight object, much of which stems  
> from its use of the xerces dom objects as underlying support, particularly    
> for the schemas.                                                              
>                                                                               
> One area to investigate is the saving of the WSDLDefinition as a Parameter    
> in the AxisService's ParameterInclude list so that, if some component needs   
> to utilize the WSDLDefinition object, it can be accessed via the AxisService  
> object.                                                                       
>                                                                               
> Is it possible to reduce the utilization of the WSDLDefinition?               
> Some ideas are:                                                               
> (a) releasing it when it is no longer needed                                  
>          - this might not be possible to determine                            
>                                                                               
> (b) putting a wrapper on the WSDLDefinition                                   
>          - so that the WSDLDefinition,or a portion of the WSDLDefinition,     
>            can be released                                                    
>          - but if the WSDLDefinition is accessed after it was released,       
>            the wrapper can reload the WSDLDefinition transparently to the     
>            user                                                               
>                                                                               
> (c) create a layer for caching wsdl-related information                       
>          - this would allow for releasing memory based on some algorithm      
>            and/or interface that could indicate what's no longer needed       
>                                                                               

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


---------------------------------------------------------------------
To unsubscribe, e-mail: axis-dev-unsubscribe@ws.apache.org
For additional commands, e-mail: axis-dev-help@ws.apache.org


Mime
View raw message