UID user not found

When looking at my system log queries under console I keep having the following two messages repeat. Could this be slowing down my computer, and, if so, how do I precede?

1/11/15 10:33:09.724 AM com.apple.xpc.launchd[1]: (com.apple.mdworker.bundles[15514]) Could not find uid associated with service: 0: Undefined error: 0 502

1/11/15 10:33:09.724 AM com.apple.xpc.launchd[1]: (com.apple.mdworker.bundles) Service only ran for 0 seconds. Pushing respawn out by 10 seconds.

1/11/15 10:33:14.402 AM com.apple.xpc.launchd[1]: (com.apple.mdworker.bundles[15515]) Could not find uid associated with service: 0: Undefined error: 0 505

1/11/15 10:33:14.403 AM com.apple.xpc.launchd[1]: (com.apple.mdworker.bundles) Service only ran for 0 seconds. Pushing respawn out by 10 seconds.