使用 CombinedResourceHandler 出现 "Unable to save dynamic action with clientId 'j_idX' because the UIComponent cannot be found" 的警告

Question

当我提交和 update="@form" 时，我收到了一次下面的警告。

14:03:23,139 WARNING [javax.enterprise.resource.webcontainer.jsf.application.view] (default task-27) Unable to save dynamic action with clientId 'j_id2' because the UIComponent cannot be found
14:03:23,139 WARNING [javax.enterprise.resource.webcontainer.jsf.application.view] (default task-27) Unable to save dynamic action with clientId 'j_id3' because the UIComponent cannot be found

但是从 faces-config.xml 中删除 "org.omnifaces.resourcehandler.CombinedResourceHandler"，警告不会出现。

开发环境是...

Primefaces 7.0
Omnifaces 3.4
野蝇 16.0.0.Final

这是最小样本。（但我的生产代码更复杂，收到了很多（20-1000）条警告。）

index.xhtml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
        "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:h="http://xmlns.jcp.org/jsf/html"
      xmlns:ui="http://xmlns.jcp.org/jsf/facelets" xmlns:f="http://xmlns.jcp.org/jsf/core"
      xmlns:p="http://primefaces.org/ui">
<h:head></h:head>
<f:metadata><f:viewAction action="#{indexView.init()}"/></f:metadata>
<h:body>
    <h:form id="mainForm">
        <p:messages id="messages"/>
        <p:panelGrid id="panelGrid" columns="3" layout="grid">
            <p:outputLabel id="labelInput1" for="@next" value="input"/>
            <p:selectOneMenu id="input" value="#{indexView.selectOne}">
                <f:selectItems value="#{indexView.itemCandidates}" var="i" itemLabel="#{i}" itemValue="#{i}"/>
            </p:selectOneMenu>
            <p:commandButton id="btn" value="submit" process="panelGrid" update="@form" actionListener="#{indexView.submit}"/>
        </p:panelGrid>
    </h:form>
</h:body>
</html>

IndexView.java

package com.sample.primafaces_operation_verification;

import javax.faces.view.ViewScoped;
import // omitted // ;

@Named
@ViewScoped
public class IndexView implements Serializable {

    @Getter
    private List<String> itemCandidates;

    @Getter @Setter
    private String selectOne;

    public void init() {
        this.itemCandidates = List.of("aaa", "bbb", "ccc", "ddd");
    }

    public void submit() {
        Messages.addGlobalInfo("Selected item : {0}", selectOne);
    }
}

人脸-config.xml

<?xml version="1.0" encoding="UTF-8"?>
<faces-config xmlns="http://java.sun.com/xml/ns/javaee"
              xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
              xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-facesconfig_2_0.xsd"
              version="2.0">
    <application>
        <resource-handler>org.omnifaces.resourcehandler.CombinedResourceHandler</resource-handler>
        <action-listener>org.primefaces.application.DialogActionListener</action-listener>
        <navigation-handler>org.primefaces.application.DialogNavigationHandler</navigation-handler>
        <view-handler>org.primefaces.application.DialogViewHandler</view-handler>
    </application>
</faces-config>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
         version="3.0">
    <context-param>
        <param-name>javax.faces.PROJECT_STAGE</param-name>
        <param-value>Development</param-value>
    </context-param>
    <context-param>
        <param-name>javax.faces.FACELETS_REFRESH_PERIOD</param-name>
        <param-value>0</param-value>
    </context-param>
    <context-param>
        <param-name>primefaces.CLIENT_SIDE_VALIDATION</param-name>
        <param-value>true</param-value>
    </context-param>
    <context-param>
        <param-name>primefaces.FONT_AWESOME</param-name>
        <param-value>true</param-value>
    </context-param>
    <context-param>
        <param-name>primefaces.MOVE_SCRIPTS_TO_BOTTOM</param-name>
        <param-value>true</param-value>
    </context-param>
    <context-param>
        <param-name>javax.faces.INTERPRET_EMPTY_STRING_SUBMITTED_VALUES_AS_NULL</param-name>
        <param-value>true</param-value>
    </context-param>
    <context-param>
        <param-name>com.sun.faces.numberOfLogicalViews</param-name>
        <param-value>6</param-value>
    </context-param>
    <context-param>
        <param-name>com.sun.faces.numberOfViewsInSession</param-name>
        <param-value>6</param-value>
    </context-param>
    <context-param>
        <param-name>org.omnifaces.VIEW_SCOPE_MANAGER_MAX_ACTIVE_VIEW_SCOPES</param-name>
        <param-value>6</param-value>
    </context-param>
    <servlet>
        <servlet-name>Faces Servlet</servlet-name>
        <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>Faces Servlet</servlet-name>
        <url-pattern>*.faces</url-pattern>
    </servlet-mapping>
    <welcome-file-list>
        <welcome-file>index.faces</welcome-file>
    </welcome-file-list>
</web-app>

我预计不会收到警告。我该如何修复它？

Answer 1

我发现了几个对这个警告的引用，但没有重复的所以值得投票将你的问题作为重复来关闭，所以我会尝试通过引用来回答：

PrimeFaces nested form inside p:dialog with appendTo="@(body)

米歇尔·马里奥蒂 说：

These warnings, as for my experiments, are harmless and could be safely ignored. However I opened a pull request to eventually fix it.

BootsFaces issue 325 Unable to save dynamic action with clientId 'j_id...'

stephanrauh 于 2016 年 3 月 22 日发表评论

这是警告，不是错误。一旦将 ProjectStage 设置为生产环境，警告就会消失。所以我认为这是一个小麻烦，而不是一个严重的错误。无论如何，您是否在不使用 OmniFaces 的情况下收到警告？

stephanrauh 于 2016 年 3 月 22 日发表评论

不太可能。当您使用错误的 API 操作 JSF DOM 树时会出现警告。例如，通过简单地从列表中删除资源文件来删除它。 OmniFaces 在早期版本中就是这么做的。 JSF 检测到缺少某些东西，变得紧张并通过忽略这些令人困惑的警告来做出反应。 BootsFaces 可能使用 "forbidden" API，但我相信已经解决了这个问题。无论如何，你能上传一个重现警告的简单项目吗？这让我们的工作变得轻松多了。

总而言之 警告是由 org.omnifaces.resourcehandler.CombinedResourceHandler 从视图中删除资源触发的，这是其核心功能的一部分。尝试将 javax.faces.PROJECT_STAGE 设置为 Production 并在编码时忽略警告。

使用 CombinedResourceHandler 出现 "Unable to save dynamic action with clientId 'j_idX' because the UIComponent cannot be found" 的警告

The warning of "Unable to save dynamic action with clientId 'j_idX' because the UIComponent cannot be found" occur, with using CombinedResourceHandler

jsf

primefaces

jsf-2

omnifaces