title: javax.el.PropertyNotWritableException: The class 'com.example.Bean' does not have a writable property 'foo'
body: <p>I have below JSF input component:</p>
  
  <pre><code>&lt;h:inputText value="#{bean.foo}" /&gt;
  </code></pre>
  
  <p>Which is bound to this property:</p>
  
  <pre><code>private String foo;
  
  public String getFoo() {
      return foo;
  }
  
  private void setFoo(String foo) {
      this.foo = foo; 
  }
  </code></pre>
  
  <p>When submitting the form, below exception is thrown:</p>
  
  <pre><code>javax.faces.component.UpdateModelException: javax.el.PropertyNotWritableException: /foo.xhtml @12,34 value="#{bean.foo}": The class 'com.example.Bean' does not have a writable property 'foo'.
      at javax.faces.component.UIInput.updateModel(UIInput.java:867)
      at javax.faces.component.UIInput.processUpdates(UIInput.java:749)
      at javax.faces.component.UIForm.processUpdates(UIForm.java:281)
      at javax.faces.component.UIComponentBase.processUpdates(UIComponentBase.java:1289)
      at javax.faces.component.UIComponentBase.processUpdates(UIComponentBase.java:1289)
      at javax.faces.component.UIViewRoot.processUpdates(UIViewRoot.java:1254)
      at com.sun.faces.lifecycle.UpdateModelValuesPhase.execute(UpdateModelValuesPhase.java:78)
      at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
      at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198)
      at javax.faces.webapp.FacesServlet.service(FacesServlet.java:646)
      at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682)
      at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:318)
      at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160)
      at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673)
      at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99)
      at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174)
      at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:357)
      at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:260)
      at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:188)
      at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:191)
      at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:168)
      at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:189)
      at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
      at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:288)
      at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:206)
      at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:136)
      at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:114)
      at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
      at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:838)
      at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:113)
      at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:115)
      at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:55)
      at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:135)
      at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:564)
      at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:544)
      at java.lang.Thread.run(Thread.java:745)
  </code></pre>
  
  <p>How is this caused and how can I solve it?</p>