Zombie Process from Kaltura Batch Process

Our Kaltura server seems to be running just fine, it just looks like there are a number of zombie process when the Batch Manager is running:

kaltura 9276 1.8 0.6 320520 27148 ? S 14:17 0:00 /usr/bin/php KGenericBatchMgr.class.php /usr/bin/ph
kaltura 9278 0.0 0.0 0 0 ? Z 14:17 0:00 [sh]
kaltura 9287 0.0 0.0 0 0 ? Z 14:17 0:00 [sh]
kaltura 9289 0.0 0.0 0 0 ? Z 14:17 0:00 [sh]
kaltura 9291 0.0 0.0 0 0 ? Z 14:17 0:00 [sh]
kaltura 9293 0.0 0.0 0 0 ? Z 14:17 0:00 [sh]
kaltura 9295 0.0 0.0 0 0 ? Z 14:17 0:00 [sh]
kaltura 9297 0.0 0.0 0 0 ? Z 14:17 0:00 [sh]
kaltura 9299 0.0 0.0 0 0 ? Z 14:18 0:00 [sh]
kaltura 9308 0.0 0.0 0 0 ? Z 14:18 0:00 [sh]
kaltura 9310 0.0 0.0 0 0 ? Z 14:18 0:00 [sh]
kaltura 9312 0.0 0.0 0 0 ? Z 14:18 0:00 [sh]

If I stop the Batch Manager they go away. Should we be seeing these? Not sure if it is just unique to our environment.

Thanks,
Bill K.