On a Linux detection server, the DLP FileReader process will not start, but stays in a "starting" state indefinitely.
DLP Detection Server in Linux (RHEL) OS - usually after fresh install or upgrade
Review the list of required Linux RPMs in related article: What are the RPM requirements for Detection Server on Linux?
NOTE: In some cases, filter is not executable by protect - in this case, another error will appear when trying to run the file.
chown protect:protect opt/Symantec/DataLossPrevention/KeyView/12.5/Protect/plugins/contentextraction/Verity/x86_64/filter chmod 750 /opt/Symantec/DataLossPrevention/KeyView/12.5/Protect/plugins/contentextraction/Verity/x86_64/filter