title: redis key expire show -1 even it is set to 900 seconds
body: <p>From past few days, I am facing this issue on live.</p>
  
  <p>I am maintaining a key in REDIS and each time system setting key in redis, It also set expire in it.</p>
  
  <p>But few days back, User start saying that system behaving different. After some search, I found redis key expire set to -1. But this is not coming on test server. </p>
  
  <p>I am insert this same key from website and from game.
  Can anyone tell me, What is going on(I think concurrency issue)?</p>