Post stopped as below:
Info 2015-09-10 14:56:39.424820 59520 337889120 Poster launched, pid = 59520 (posting from SID1 queue queue_name, to SID2)
Error 2015-09-10 14:56:39.519943 59513 337889120 Cop: No such file or directory rename(/SID/8.0/vardir2100/data/statusdb.new,/SID/8.0/vardir2100/data/statusdb) [module stt]
Error 2015-09-10 14:56:39.523351 59517 337889120 Cop: No such file or directory rename(/SID/8.0/vardir2100/data/statusdb.new,/SID/8.0/vardir2100/data/statusdb) [module stt]
Info 2015-09-10 14:56:39.570860 59909 337889120 Poster exited with code=1, pid = 59933 (posting from SID1, queue queue_name, to SID2)
Resolve the disk issues which include disk full, network issues, among others with device holding SharePlex variable directory. Then restart Post. If restarting Post does not help, then contact Support to see if there is any queue corruption or if any SharePlex file in rim or state directory is missing or corrupted so that the queues can be salvaged to the maximum extent possible. In worst case scenario, the replication may need to be re-established which will require database downtime and resync of target.