解决检票口内存泄漏问题

我们有一个内存不足的应用程序。我得到以下错误。解决检票口内存泄漏问题

java.lang.OutOfMemoryError: GC overhead limit exceeded

当我把堆转储，我可以看到下列

我的代码看起来像下面。

public class CommonPanel extends Panel { 

    private static ResourceModel SUCCESS_MESSAGE; 
    private static ResourceModel VALIDATE_ZERO_MSG; 
    private static Model<SomeInfoObject> someInfo; 

    public CommonPanel(String id, boolean isRedirect) { 
     super(id); 

     someInfo = Model.of(); 

     SUCCESS_MESSAGE = new ResourceModel("successMessage"); 
     VALIDATE_ZERO_MSG = new ResourceModel("zero.message"); 

     Form<MyObject> form = new Form<>("myForm", new CompoundPropertyModel<>(new MyObject())); 
     Label successLabel= new Label("success", SUCCESS_MESSAGE); 
     add(successLabel.setVisible(isRedirect)); 
     add(new Label("title", getPanelTitle(id))); 

     FeedbackPanel errorFeedbackPanel = new BootstrapFilteredFeedbackPanel("errorFeedbackPanel", FeedbackType.ERROR); 
     errorFeedbackPanel.setOutputMarkupPlaceholderTag(true); 
     form.add(errorFeedbackPanel); 

     SomeInfoPanel someInfoPanel = new SomeInfoPanel("somePanel", someInfo); 
     someInfoPanel.setOutputMarkupId(true); 
     someInfoPanel.setOutputMarkupPlaceholderTag(true); 
     form.add(someInfoPanel); 

//...................more code here 

    } 

    @Override 
    public void onDetach() { 
     super.onDetach(); 
     SUCCESS_MESSAGE.detach(); 
     VALIDATE_ZERO_MSG.detach(); 
     someInfo.detach(); 
    } 
} 

public class SomeInfoPanel extends Panel { 

    public SomeInfoPanel(String id, IModel<SomeObject> model) { 
     super(id, model); 
     add(new FallbackLabel("name", PropertyModel.of(model, "someName"), "")); 
    }  
}

从我读到的，wicket序列化这个类的实例并存储在会话中。这是泄漏的原因吗？如何防止这种情况？

来源

2017-02-14 Jigar Shah