Hi Jess, I have same problem and upgrade 11.8.0 to 11.9.0 yesterday, but batch script execution is failing and converting not working. Kaltura-batch restarts.

[root@media ~]# /etc/init.d/kaltura-batch restart
Stopping Batch Manager....
Killing Batch Manager with PID and related workers [ OK ]
Starting Batch Manager....
Batch Manager started with PID [ OK ]

kaltlog:

--
2016-03-02 13:16:12 [0.000000] [1813965679] [1] [BATCH] [KSchedulerConfig->load] NOTICE: loading configuration /opt/kaltura/app/configurations/batch at 1456919911
PHP Warning: file_put_contents(/batch.pid): failed to open stream: Permission denied in /opt/kaltura/app/batch/scheduler/KGenericScheduler.class.php on line 97
2016-03-02 13:16:12 [0.042543] [1813965679] [2] [BATCH] [KGenericScheduler->loadConfig] INFO: 2.0.2
--
==> /opt/kaltura/log/kaltura_prod.log <==
2016-03-02 13:16:18 [9.000846] [xx.xx.xx.xx] [728976448] [12] [PS2] [KExternalErrors::dieError] ERR: exception 'Exception' with message 'exiting on error 5 - required file was not found' in /opt/kaltura/app/infra/log/KalturaLog.php:83
Stack trace:

0 /opt/kaltura/app/alpha/apps/kaltura/lib/KExternalErrors.class.php(128): KalturaLog::err('exiting on erro...')

Any help to solve this issue?
Many thanks,
Vassy