Set command automatically sends expire as well

[yellowandy]

I'm currently setting a key/value with the basic set command (not expire) and noticed something weird in the logs. I saw the following while telneted into redis with the MONITOR command:

+1420445962.505686 [0 10.0.1.220:58459] "set" [email protected]_initialSync" "true"
+1420445962.505698 [0 10.0.1.220:58459] "expire" "[email protected]_initialSync" "100"

I never issued the expire command and I'm not sure where it could be coming from. The TTL in fact does get set and as a result I loose all my keys. Any ideas if the node package could be causing this?