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The error occurs when the configuration file is bigger than 256 MB, causing a heap overflow of the Java Virtual Machine (JVM). To resolve the issue, increase the heap size:

  1. Edit the configuration file /usr/iwss/AdminUI/tomcatctl.sh as described in KB 1113864.

  2. Find the following line:

    CATALINA_OPTS="-Xmx256m"

  3. Set this parameter to a larger value, for example change it to:

    CATALINA_OPTS="-Xmx512m"

  4. Restart the service for the web console with the following command:

    /usr/iwss/S99IScanHttpd restart

 
Possible values for the heap size parameter are 256, 512, 1024, etc. If increasing the size to 512 MB does not resolve the issue, please choose a higer value, for example "-Xmx1024m".
Keywords: HTTP 500,HTTP Status 500,http status 500 error,HTTP Status 500 error,http 500 error,http status 500,java.lang.OutOfMemoryError,java heap space,heap space,java.lang.OutOfMemoryError: Java heap space