During detection, if a message causes an out of process IDM to run out of memory, subsequent messages will not be detected by IDM until the filereader is restarted. The following error is recorded in the FileReader log:
SEVERE: Failed to detect on document match condition IDM_index_name.
com.vontu.profileindex.IndexException: Failed to lookup index in RAM index process DOCIDX_1234_1. No further incidents will be detected against this RAM index instance.
This issue was fixed in DLP 11.1.1 per Etrack 2381488, release notes 11.1.2 and newer document the same.