Problem

ERROR "An unexpected exception has occured:283" occurs when trying to generate report

Following ERROR can be noticed in logs:
2017-10-29 15:31:47 [-157.121.24.175] ERROR L4762 SentinelTnTServicesImpl.generateReport - Error occurred during report generation: null

or

2017-10-29 15:54:15 [-157.121.24.175] ERROR L4762 SentinelTnTServicesImpl.generateReport - Error occurred during report generation: 0

This same error can be noticed in "$SENTINELHOME/log/sentinel.log" & "$SENTINELHOME/log/detail/acquisition.log"

Resolution

1. This ERROR is specific to RHEL 7.4
2. Force back Utopia as the default font used by java

In order to force back Utopia as the default font used by java.. Create a file name /etc/fonts/local.conf with following contents:
<?xml version='1.0'?>
<!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
<fontconfig>
<alias>
<family>serif</family>
<prefer><family>Utopia</family></prefer>
</alias>
<alias>
<family>sans-serif</family>
<prefer><family>Utopia</family></prefer>
</alias>
<alias>
<family>monospace</family>
<prefer><family>Utopia</family></prefer>
</alias>
<alias>
<family>dialog</family>
<prefer><family>Utopia</family></prefer>
</alias>
<alias>
<family>dialoginput</family>
<prefer><family>Utopia</family></prefer>
</alias>
</fontconfig>

Note

For details refer following link:
https://stackoverflow.com/questions/45569367/upgra...