Notification does not end up removing session from cache if first apache bucket contains less than 6 bytes

As part of nofifications, they are preserved in post data files.
The agent tries to read from an apache bucket and checks the size and whether it is a LARES string. If the first chunk is <6 bytes

EXPECTED BEHAVIOUR
agent can cope with this situation, and will write to file if it is not LARES

ACTUAL BEHAVIOUR
agent will write to memory instead. The notification handler cannot handle this and logs

2016-09-26 16:24:44.807 -0500   DEBUG [0x7f56423e9700:19586][source/apache/agent22.c:762] get_request_body(): read xxxx bytes
2016-09-26 16:24:44.807 -0500 WARNING [0x7f5623fff700:19586] notification_worker(): post data is not available
The session is not removed allowing access when it should not be allowed.