CODEWITHSUNDEEP
google-app-enginejakarta-eeobjectify
vctlzac
vctlzac

Reputation: 847

InvalidClassException: No valid constructor

When I run app in localhost, it work, but when deploy to GAE, throw the following error:

http://myapp.appspot.com/Login
javax.servlet.ServletException: java.lang.RuntimeException: java.io.InvalidClassException: br.com.myapp.dao.MercadoriaDAOOfyImpl; br.com.myapp.dao.MercadoriaDAOOfyImpl; no valid constructor
at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:268)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
at com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable(RpcRequestParser.java:76)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:146)
at com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run(JavaRuntime.java:439)
at com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:435)
at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:442)
at com.google.tracing.CurrentContext.runInContext(CurrentContext.java:186)
at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:306)
at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:298)
at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:439)
at com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:251)
at java.lang.Thread.run(Thread.java:722)
    Caused by: java.lang.RuntimeException: java.io.InvalidClassException: br.com.myapp.dao.MercadoriaDAOOfyImpl; br.com.myapp.dao.MercadoriaDAOOfyImpl; no valid constructor
at com.google.apphosting.runtime.SessionManagerUtil.deserialize(SessionManagerUtil.java:57)
at com.google.apphosting.runtime.jetty.MemcacheSessionStore.getSession(MemcacheSessionStore.java:39)
at com.google.apphosting.runtime.jetty.SessionManager.loadSession(SessionManager.java:327)
at com.google.apphosting.runtime.jetty.SessionManager.getSession(SessionManager.java:301)
at org.mortbay.jetty.servlet.AbstractSessionManager.getHttpSession(AbstractSessionManager.java:237)
at org.mortbay.jetty.servlet.SessionHandler.setRequestedId(SessionHandler.java:246)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:136)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:266)
... 16 more
Caused by: java.io.InvalidClassException: br.com.myapp.dao.MercadoriaDAOOfyImpl; br.com.myapp.dao.MercadoriaDAOOfyImpl; no valid constructor
at java.io.ObjectStreamClass.checkDeserialize(ObjectStreamClass.java:730)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1799)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1395)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2012)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1936)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1819)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1395)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:396)
at java.util.HashMap.readObject(HashMap.java:1043)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:991)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1914)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1819)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1395)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2012)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1936)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1819)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1395)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:396)
at com.google.apphosting.runtime.SessionManagerUtil.deserialize(SessionManagerUtil.java:55)
... 25 more
Caused by: java.io.InvalidClassException: br.com.myapp.dao.MercadoriaDAOOfyImpl; no valid constructor
at java.io.ObjectStreamClass.<init>(ObjectStreamClass.java:488)
at java.io.ObjectStreamClass.lookup(ObjectStreamClass.java:327)
at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:564)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1649)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1562)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798)
... 46 more
W 2013-09-19 21:44:19.795
Nested in javax.servlet.ServletException:     java.lang.RuntimeException: java.io.InvalidClassException: br.com.myapp.dao.MercadoriaDAOOfyImpl; br.com.myapp.dao.MercadoriaDAOOfyImpl; no valid constructor:
java.lang.RuntimeException: java.io.InvalidClassException: br.com.myapp.dao.MercadoriaDAOOfyImpl; br.com.myapp.dao.MercadoriaDAOOfyImpl; no valid constructor
at com.google.apphosting.runtime.SessionManagerUtil.deserialize(SessionManagerUtil.java:57)
at com.google.apphosting.runtime.jetty.MemcacheSessionStore.getSession(MemcacheSessionStore.java:39)
at com.google.apphosting.runtime.jetty.SessionManager.loadSession(SessionManager.java:327)
at com.google.apphosting.runtime.jetty.SessionManager.getSession(SessionManager.java:301)
at org.mortbay.jetty.servlet.AbstractSessionManager.getHttpSession(AbstractSessionManager.java:237)
at org.mortbay.jetty.servlet.SessionHandler.setRequestedId(SessionHandler.java:246)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:136)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:266)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
at com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable(RpcRequestParser.java:76)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:146)
at com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run(JavaRuntime.java:439)
at com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:435)
at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:442)
at com.google.tracing.CurrentContext.runInContext(CurrentContext.java:186)
at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:306)
at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:298)
at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:439)
at com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:251)
at java.lang.Thread.run(Thread.java:722)
Caused by: java.io.InvalidClassException: br.com.myapp.dao.MercadoriaDAOOfyImpl; br.com.myapp.dao.MercadoriaDAOOfyImpl; no valid constructor
at java.io.ObjectStreamClass.checkDeserialize(ObjectStreamClass.java:730)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1799)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1395)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2012)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1936)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1819)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1395)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:396)
at java.util.HashMap.readObject(HashMap.java:1043)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:991)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1914)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1819)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1395)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2012)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1936)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1819)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1395)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:396)
at com.google.apphosting.runtime.SessionManagerUtil.deserialize(SessionManagerUtil.java:55)
... 25 more
Caused by: java.io.InvalidClassException: br.com.myapp.dao.MercadoriaDAOOfyImpl; no valid constructor
at java.io.ObjectStreamClass.<init>(ObjectStreamClass.java:488)
at java.io.ObjectStreamClass.lookup(ObjectStreamClass.java:327)
at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:564)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1649)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1562)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798)
... 46 more

In MercadoriaMbean.java:

public class MercadoriaMBean implements Serializable {

private MercadoriaDAO dao;

public MercadoriaMBean() {
    dao = new MercadoriaDAOOfyImpl();
    fillMercadorias();
}

MercadoriaDAOOfyImpl.java:

public class MercadoriaDAOOfyImpl extends AbstractObjectifyDAO<Mercadoria>
    implements Serializable, MercadoriaDAO {

public MercadoriaDAOOfyImpl() {
    super(Mercadoria.class);
}

AbstractObjectifyDAO.java:

public class AbstractObjectifyDAO<T extends AbstractEntity> {

private Class<T> clazz;

public AbstractObjectifyDAO(Class<T> clazz) {
    this.clazz = clazz;
}

EDIT

Using Reflection:

    public AbstractObjectifyDAO(String clazz) {

    ClassLoader myClassLoader = ClassLoader.getSystemClassLoader();

    try {
        this.clazz = (Class<T>) myClassLoader.loadClass(clazz);
    } catch (ClassNotFoundException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}

Throwing error:

java.lang.IllegalArgumentException: Class hierarchy for class br.com.myapp.model.Mercadoria has no @Entity annotation

In AbstractObjectifyDAO.class:

    public List<T> getAll() {
    return ofy().load().type(clazz).list();
}

I checked that Mercadoria.class have @Entity annotation.

Upvotes: 0

Views: 1751

Answers (1)

M.Sameer
M.Sameer

Reputation: 3151

What I understood from the stack trace is that the error occurs when MercadoriaDAOOfyImpl is being deserialized. Deserialization needs the class to have no-args constructor which is true for MercadoriaDAOOfyImpl and the class to have serialVersionUID.

From the Java Documentation here :

The serialization runtime associates with each serializable class a version number, called a serialVersionUID, which is used during deserialization to verify that the sender and receiver of a serialized object have loaded classes for that object that are compatible with respect to serialization. If the receiver has loaded a class for the object that has a different serialVersionUID than that of the corresponding sender's class, then deserialization will result in an InvalidClassException. A serializable class can declare its own serialVersionUID explicitly by declaring a field named "serialVersionUID" that must be static, final, and of type long.

I do not see serialVersionUID in MercadoriaDAOOfyImpl so if it's missing you may try to add it first and see if it solves the problem.

If it's there or it does not solve the problem try and remove the parameter Class<T> clazz from the AbstractObjectifyDAO constructor and obtained clazz using reflection and see if the problem will be solved or let's see what the error will be in this case.

Upvotes: 1

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