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Posted to user@struts.apache.org by sreekanth <sr...@egovernments.org> on 2018/01/02 17:06:58 UTC
Unknown Error From JSON-Plugin
Hi,
I'm using struts2-2.5.14.1 in my EAR deployed in wildfly server, rarely
we are getting the following error when i'm accessing struts2 page.
Caused by: Unable to load configuration. - bean -
vfs:/content/my-app.ear/lib/struts2-json-plugin-2.5.14.1.jar/struts-plugin.xml:28:30
at
com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:69)
at
org.apache.struts2.dispatcher.Dispatcher.getContainer(Dispatcher.java:957)
at
org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:463)
at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:496)
... 107 more
Caused by: Unable to load bean: type:org.apache.struts2.json.JSONWriter
class:org.apache.struts2.json.DefaultJSONWriter - bean -
vfs:/content/my-app.ear/lib/struts2-json-plugin-2.5.14.1.jar/struts-plugin.xml:28:30
at
com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.register(XmlConfigurationProvider.java:274)
at
org.apache.struts2.config.StrutsXmlConfigurationProvider.register(StrutsXmlConfigurationProvider.java:95)
at
com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:167)
at
com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:66)
... 110 more
Caused by: java.lang.ClassFormatError: Failed to link
org/apache/struts2/json/DefaultJSONWriter (Module "deployment.my-app.ear"
from Service Module Loader): Failed to link
org/apache/struts2/json/JSONWriter (Module "deployment.my-app.ear" from
Service Module Loader): Illegal field modifiers in class
org/apache/struts2/json/JSONWriter: 0xA
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at
sun.reflect.DelegatingConstructorAccessorImpl.__newInstance(DelegatingConstructorAccessorImpl.java:45)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at
org.jboss.modules.ModuleClassLoader.defineClass(ModuleClassLoader.java:446)
at
org.jboss.modules.ModuleClassLoader.loadClassLocal(ModuleClassLoader.java:274)
at
org.jboss.modules.ModuleClassLoader$1.loadClassLocal(ModuleClassLoader.java:77)
at org.jboss.modules.Module.loadModuleClass(Module.java:713)
at
org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:190)
at
org.jboss.modules.ConcurrentClassLoader.performLoadClassUnchecked(ConcurrentClassLoader.java:412)
at
org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:400)
at
org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:116)
at
com.opensymphony.xwork2.util.ClassLoaderUtil.loadClass(ClassLoaderUtil.java:171)
at
com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.register(XmlConfigurationProvider.java:247)
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Re: Unknown Error From JSON-Plugin
Posted by "john@rodaxsoft.com" <jo...@rodaxsoft.com>.
Could you share the code of the offending class/interface? Also, is the deployed code being compiled on a Java version that <= to server’s Java version?
> On Jan 2, 2018, at 9:06 AM, sreekanth <sr...@egovernments.org> wrote:
>
> Hi,
> I'm using struts2-2.5.14.1 in my EAR deployed in wildfly server, rarely
> we are getting the following error when i'm accessing struts2 page.
>
> Caused by: Unable to load configuration. - bean -
> vfs:/content/my-app.ear/lib/struts2-json-plugin-2.5.14.1.jar/struts-plugin.xml:28:30
> at
> com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:69)
> at
> org.apache.struts2.dispatcher.Dispatcher.getContainer(Dispatcher.java:957)
> at
> org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:463)
> at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:496)
> ... 107 more
> Caused by: Unable to load bean: type:org.apache.struts2.json.JSONWriter
> class:org.apache.struts2.json.DefaultJSONWriter - bean -
> vfs:/content/my-app.ear/lib/struts2-json-plugin-2.5.14.1.jar/struts-plugin.xml:28:30
> at
> com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.register(XmlConfigurationProvider.java:274)
> at
> org.apache.struts2.config.StrutsXmlConfigurationProvider.register(StrutsXmlConfigurationProvider.java:95)
> at
> com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:167)
> at
> com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:66)
> ... 110 more
> Caused by: java.lang.ClassFormatError: Failed to link
> org/apache/struts2/json/DefaultJSONWriter (Module "deployment.my-app.ear"
> from Service Module Loader): Failed to link
> org/apache/struts2/json/JSONWriter (Module "deployment.my-app.ear" from
> Service Module Loader): Illegal field modifiers in class
> org/apache/struts2/json/JSONWriter: 0xA
> at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
> at
> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
> at
> sun.reflect.DelegatingConstructorAccessorImpl.__newInstance(DelegatingConstructorAccessorImpl.java:45)
> at
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java)
> at
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java)
> at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
> at
> org.jboss.modules.ModuleClassLoader.defineClass(ModuleClassLoader.java:446)
> at
> org.jboss.modules.ModuleClassLoader.loadClassLocal(ModuleClassLoader.java:274)
> at
> org.jboss.modules.ModuleClassLoader$1.loadClassLocal(ModuleClassLoader.java:77)
> at org.jboss.modules.Module.loadModuleClass(Module.java:713)
> at
> org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:190)
> at
> org.jboss.modules.ConcurrentClassLoader.performLoadClassUnchecked(ConcurrentClassLoader.java:412)
> at
> org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:400)
> at
> org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:116)
> at
> com.opensymphony.xwork2.util.ClassLoaderUtil.loadClass(ClassLoaderUtil.java:171)
> at
> com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.register(XmlConfigurationProvider.java:247)
>
>
>
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Re: Unknown Error From JSON-Plugin
Posted by sreekanth <sr...@egovernments.org>.
I'm already using the latest of JDK 8 :- jdk1.8.0_152 (Linux)
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Re: Unknown Error From JSON-Plugin
Posted by Yasser Zamani <ya...@apache.org>.
On 1/2/2018 8:36 PM, sreekanth wrote:
> Caused by: java.lang.ClassFormatError: Failed to link
> org/apache/struts2/json/DefaultJSONWriter (Module "deployment.my-app.ear"
> from Service Module Loader): Failed to link
> org/apache/struts2/json/JSONWriter (Module "deployment.my-app.ear" from
> Service Module Loader): Illegal field modifiers in class
> org/apache/struts2/json/JSONWriter: 0xA
It seems a jdk bug according to [1]. Could you try an update and see if
disappears.
[1] https://bugs.openjdk.java.net/browse/JDK-8025141
Re: Unknown Error From JSON-Plugin
Posted by Yasser Zamani <ya...@apache.org>.
On 1/3/2018 10:47 AM, sreekanth wrote:
> I have a view page for displaying some already persisted data, this page most
> of the time loads without any error (with the same set of data) and rarely
> throws the exception which i have shared here. 75% time i've experienced
> this exception when there is class reload happens (as a part of hot
> deployment)
OK, let's see what news here and finish it :)
Could you please add following conf to your current conf ...
package me.zamani.yasser.ww_convention.actions;
import org.apache.struts2.json.JSONWriter;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
public class ReflectionAction {
private String result;
public String getResult() {
return result;
}
public String execute(){
try {
Field f =
JSONWriter.class.getDeclaredField("ENUM_AS_BEAN_DEFAULT");
result = Modifier.toString(f.getModifiers());
} catch (NoSuchFieldException e) {
result = e.getMessage();
}
return "success";
}
}
<%@ page contentType="text/html; charset=UTF-8" %>
<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
<title>hello</title>
<s:head />
</head>
<body>
<h1><s:property value="result"/></h1>
</body>
</html>
<action name="reflection"
class="me.zamani.yasser.ww_convention.actions.ReflectionAction">
<result name="success">WEB-INF/content/reflection-success.jsp</result>
</action>
Then when this issue occurred, browse
http://yourIp:yourPort/yourContextPath/reflection and tell me what you
see, please?
Re: Unknown Error From JSON-Plugin
Posted by sreekanth <sr...@egovernments.org>.
I have a view page for displaying some already persisted data, this page most
of the time loads without any error (with the same set of data) and rarely
throws the exception which i have shared here. 75% time i've experienced
this exception when there is class reload happens (as a part of hot
deployment)
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Re: Unknown Error From JSON-Plugin
Posted by sreekanth <sr...@egovernments.org>.
That's why i have given the title as Unknow error , the one possible cause i
can think of is, i experienced mostly when i'm doing hot deployment to some
service classes (but that class is nowhere referenced in the struts2 Action
class )
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Re: Unknown Error From JSON-Plugin
Posted by Yasser Zamani <ya...@apache.org>.
On 1/2/2018 10:31 PM, Yasser Zamani wrote:
>
>
> On 1/2/2018 9:26 PM, Yasser Zamani wrote:
>> Illegal field modifiers in class
>> org/apache/struts2/json/JSONWriter: 0xA
>
> I'm confused :( 0xA means `JVM_ACC_PRIVATE | JVM_ACC_STATIC` but the
> fields in an interface are implicitly public static final i.e.
> org/apache/struts2/json/JSONWriter.ENUM_AS_BEAN_DEFAULT implicitly is
> public static final. I have no idea while your compiler sees it as
> private static!
and I see you say it happens rarely; This makes it even more confusing :S
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Re: Unknown Error From JSON-Plugin
Posted by Yasser Zamani <ya...@apache.org>.
On 1/3/2018 9:58 AM, Yasser Zamani wrote:
>
>
> On 1/2/2018 10:31 PM, Yasser Zamani wrote:
>>
>>
>> On 1/2/2018 9:26 PM, Yasser Zamani wrote:
>>> Illegal field modifiers in class
>>> org/apache/struts2/json/JSONWriter: 0xA
>>
>> I'm confused :( 0xA means `JVM_ACC_PRIVATE | JVM_ACC_STATIC` but the
>> fields in an interface are implicitly public static final i.e.
>> org/apache/struts2/json/JSONWriter.ENUM_AS_BEAN_DEFAULT implicitly is
>> public static final. I have no idea while your compiler sees it as
>> private static!
>
> and I see you say it happens rarely; This makes it even more confusing :S
May I know what did you mean by `rarely`? You have some json actions
which being called rarely but always fail when called? Or when a
specific json action being called, a few of calls fail rarely?
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Re: Unknown Error From JSON-Plugin
Posted by Yasser Zamani <ya...@apache.org>.
On 1/2/2018 9:26 PM, Yasser Zamani wrote:
> Illegal field modifiers in class
> org/apache/struts2/json/JSONWriter: 0xA
I'm confused :( 0xA means `JVM_ACC_PRIVATE | JVM_ACC_STATIC` but the
fields in an interface are implicitly public static final i.e.
org/apache/struts2/json/JSONWriter.ENUM_AS_BEAN_DEFAULT implicitly is
public static final. I have no idea while your compiler sees it as
private static!