Hi @Xiaorong.Xu

Is the client accessing the Msg Payload outside the EMA thread e.g. they are trying to access the payload after returning from OnUpdateMsg handler?

The EMA API owns the Msg and you cannot access it once you have returned from the event Handler callback e.g. onRefreshMsg(), onUpdateMsg() etc.

If they want to access the Msg after returning from the above callbacks, then they should clone the msg before using in a different thread e.g.

public void onUpdateMsg(UpdateMsg updateMsg, OmmConsumerEvent event)
{
    UpdateMsg clonedUpdMsg = EmaFactory.createUpdateMsg(updateMsg);
    // store / pass clonedUpdMsg for use in other thread..
    //......
    return;
}

Thank you very much Nalla. Problem resolved.