The following error message is written in the manager for z/OS Log after every job submission:
ERROR!X!ZOS!pid=p.t!hostent_lock_init !pthread_once(hostent_lock_create) error -1
Nevertheless, the job is submitted correctly.
Manager for z/OS 6.x on z/OS (MVS)
Workaround: ignore the Error as it has no side-effects.
Solution: update to a fix version listed below or a newer version if available.
Dollar Universe 6.10.11 - Released 2th October 2019