title: Cloudwatch logs - No Event Data after time elapses
body: <p>I've looked on the <a href="https://forums.aws.amazon.com/thread.jspa?threadID=223930" rel="noreferrer">AWS forums</a> and elsewhere but haven't found a solution. I have a lambda function that, when invoked, creates a log stream which populates with log events. After about 12 hours or so, the log stream is still present, but when I open it, I see the following: </p>
  
  <p><a href="https://i.stack.imgur.com/JYM6S.png" rel="noreferrer"><img src="https://i.stack.imgur.com/JYM6S.png" alt="No Event Data"></a></p>
  
  <p>The link explains how to start sending event data, but I already have this set up, and I am sending event data, it just disappears after a certain time period.</p>
  
  <p>I'm guessing there is some setting somewhere (either for max storage allowed or for whether logs get purged), but if there is, I haven't found it. </p>