Grid does not update correctly

Hello,

I am using Vaadin 7.5.6 and jdk1.8.0_25.

I have a Grid component and I am getting the following exception at sporadic times (not always). It looks an awful lot like issue #15454 which was supposedly already resolved.

Does anyone have any idea why?

Oct 07, 2015 2:09:47 PM com.vaadin.server.DefaultErrorHandler doDefault
SEVERE:
java.lang.IndexOutOfBoundsException: Index: 4, Size: 4
    at java.util.ArrayList.rangeCheck(ArrayList.java:653)
    at java.util.ArrayList.get(ArrayList.java:429)
    at com.vaadin.data.util.AbstractInMemoryContainer.getIdByIndex(AbstractInMemoryContainer.java:333)
    at com.vaadin.data.RpcDataProviderExtension$ActiveRowHandler.addValueChangeListeners(RpcDataProviderExtension.java:357)
    at com.vaadin.data.RpcDataProviderExtension$ActiveRowHandler.setActiveRows(RpcDataProviderExtension.java:347)
    at com.vaadin.data.RpcDataProviderExtension.pushRowData(RpcDataProviderExtension.java:955)
    at com.vaadin.data.RpcDataProviderExtension.access$1100(RpcDataProviderExtension.java:80)
    at com.vaadin.data.RpcDataProviderExtension$2.requestRows(RpcDataProviderExtension.java:853)
    at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at com.vaadin.server.ServerRpcManager.applyInvocation(ServerRpcManager.java:158)
    at com.vaadin.server.ServerRpcManager.applyInvocation(ServerRpcManager.java:118)
    at com.vaadin.server.communication.ServerRpcHandler.handleInvocations(ServerRpcHandler.java:313)
    at com.vaadin.server.communication.ServerRpcHandler.handleRpc(ServerRpcHandler.java:202)
    at com.vaadin.server.communication.PushHandler$2.run(PushHandler.java:153)
    at com.vaadin.server.communication.PushHandler.callWithUi(PushHandler.java:232)
    at com.vaadin.server.communication.PushHandler.onMessage(PushHandler.java:492)
    at com.vaadin.server.communication.PushAtmosphereHandler.onMessage(PushAtmosphereHandler.java:88)
    at com.vaadin.server.communication.PushAtmosphereHandler.onRequest(PushAtmosphereHandler.java:78)
    at org.atmosphere.cpr.AsynchronousProcessor.action(AsynchronousProcessor.java:199)
    at org.atmosphere.cpr.AsynchronousProcessor.suspended(AsynchronousProcessor.java:107)
    at org.atmosphere.container.Jetty9AsyncSupportWithWebSocket.service(Jetty9AsyncSupportWithWebSocket.java:180)
    at org.atmosphere.cpr.AtmosphereFramework.doCometSupport(AtmosphereFramework.java:2075)
    at org.atmosphere.websocket.DefaultWebSocketProcessor.dispatch(DefaultWebSocketProcessor.java:571)
    at org.atmosphere.websocket.DefaultWebSocketProcessor$3.run(DefaultWebSocketProcessor.java:333)
    at org.atmosphere.util.VoidExecutorService.execute(VoidExecutorService.java:101)
    at org.atmosphere.websocket.DefaultWebSocketProcessor.dispatch(DefaultWebSocketProcessor.java:328)
    at org.atmosphere.websocket.DefaultWebSocketProcessor.invokeWebSocketProtocol(DefaultWebSocketProcessor.java:425)
    at org.atmosphere.container.Jetty9WebSocketHandler.onWebSocketText(Jetty9WebSocketHandler.java:92)
    at org.eclipse.jetty.websocket.common.events.JettyListenerEventDriver.onTextMessage(JettyListenerEventDriver.java:128)
    at org.eclipse.jetty.websocket.common.message.SimpleTextMessage.messageComplete(SimpleTextMessage.java:69)
    at org.eclipse.jetty.websocket.common.events.AbstractEventDriver.appendMessage(AbstractEventDriver.java:64)
    at org.eclipse.jetty.websocket.common.events.JettyListenerEventDriver.onTextFrame(JettyListenerEventDriver.java:122)
    at org.eclipse.jetty.websocket.common.events.AbstractEventDriver.incomingFrame(AbstractEventDriver.java:160)
    at org.eclipse.jetty.websocket.common.WebSocketSession.incomingFrame(WebSocketSession.java:309)
    at org.eclipse.jetty.websocket.common.extensions.ExtensionStack.incomingFrame(ExtensionStack.java:214)
    at org.eclipse.jetty.websocket.common.Parser.notifyFrame(Parser.java:220)
    at org.eclipse.jetty.websocket.common.Parser.parse(Parser.java:258)
    at org.eclipse.jetty.websocket.common.io.AbstractWebSocketConnection.readParse(AbstractWebSocketConnection.java:628)
    at org.eclipse.jetty.websocket.common.io.AbstractWebSocketConnection.onFillable(AbstractWebSocketConnection.java:476)
    at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:540)
    at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
    at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)
    at java.lang.Thread.run(Thread.java:745)

Many thanks,
-George Soler