Session reloading fails on Tomee (JSF project in development in Eclips)

Question

I have a JSF project developped in Eclipse and I've recently moved from Tomcat 8 + Mojarra JSF-2.2 using Managed beans/properties to a Tomee 7 + MyFaces-2 using CDI environment to be able to add Omnifaces into the project. After many hours everything seems to be working except sessions reloading. I'm getting the following exception when saving a change in the code which initiates the reload (it was working properly with Tomcat 8):

SEVERE org.apache.catalina.session.StandardManager startInternal: Exception loading sessions from persistent storage
java.lang.NullPointerException
at org.apache.webbeans.proxy.NormalScopeProxyFactory.createNormalScopeProxy(NormalScopeProxyFactory.java:121)
at org.apache.webbeans.intercept.NormalScopedBeanInterceptorHandler.readResolve(NormalScopedBeanInterceptorHandler.java:125)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at java.io.ObjectStreamClass.invokeReadResolve(ObjectStreamClass.java:1104)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1810)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1351)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1993)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1918)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1801)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1351)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1993)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1918)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1801)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1351)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:371)
at java.util.HashMap.readObject(HashMap.java:1396)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1017)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1896)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1801)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1351)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:371)
at org.apache.webbeans.context.PassivatingContext.readExternal(PassivatingContext.java:54)
at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1840)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1799)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1351)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:371)
at org.apache.catalina.session.StandardSession.doReadObject(StandardSession.java:1627)
at org.apache.catalina.session.StandardSession.readObjectData(StandardSession.java:1090)
at org.apache.catalina.session.StandardManager.doLoad(StandardManager.java:261)
at org.apache.catalina.session.StandardManager.load(StandardManager.java:180)
at org.apache.catalina.session.StandardManager.startInternal(StandardManager.java:460)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5253)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.StandardContext.reload(StandardContext.java:3812)
at org.apache.catalina.loader.WebappLoader.backgroundProcess(WebappLoader.java:292)
at org.apache.tomee.catalina.TomEEWebappLoader.backgroundProcess(TomEEWebappLoader.java:59)
at org.apache.tomee.catalina.LazyStopLoader.backgroundProcess(LazyStopLoader.java:105)
at org.apache.catalina.core.StandardContext.backgroundProcess(StandardContext.java:5597)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1377)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1381)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1381)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1349)
at java.lang.Thread.run(Thread.java:745)

I found some similar problems with loading the sessions but these were always different exceptions (some IO or Class Not Found exceptions).

Does any of you have an idea what's wrong with the server or project?

---

Used libraries:

• BootsFaces-OSP-0.8.1-dist-default.jar
• botdetect-3.0.alpha3.jar
• javax.servlet.jsp.jstl-1.2.1.jar
• javax.servlet.jsp.jstl-api-1.2.1.jar
• omnifaces-2.2.jar primefaces-5.3.jar

web.xml:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
id="WebApp_ID" version="3.1">

<display-name>Name</display-name>

<servlet>
    <servlet-name>Faces Servlet</servlet-name>
    <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet>
    <servlet-name>BotDetect Captcha</servlet-name>
    <servlet-class>botdetect.web.http.CaptchaServlet</servlet-class>
</servlet>

<servlet-mapping>
    <servlet-name>Faces Servlet</servlet-name>
    <url-pattern>*.jsf</url-pattern>
</servlet-mapping>
<servlet-mapping>
    <servlet-name>BotDetect Captcha</servlet-name>
    <url-pattern>/botdetectcaptcha</url-pattern>
</servlet-mapping>

<context-param>
    <param-name>javax.faces.STATE_SAVING_METHOD</param-name>
    <param-value>server</param-value>
</context-param>
<context-param>
    <param-name>javax.servlet.jsp.jstl.fmt.localizationContext</param-name>
    <param-value>resources.application</param-value>
</context-param>
<context-param>
    <param-name>LBD_soundEnabled</param-name>
    <param-value>false</param-value>
</context-param>
<context-param>
    <param-name>javax.faces.PROJECT_STAGE</param-name>
    <param-value>Development</param-value>
</context-param>

<welcome-file-list>
    <welcome-file>index.jsf</welcome-file>
</welcome-file-list>
</web-app>