Here's the two steps to be done for writing more than 2048 characters to SYSLOG:
1. On the Gateway, add com.l7tech.server.log.syslog.maxLength system property into /opt/SecureSpan/Gateway/node/default/etc/conf/system.properties file with the desired length (max length is 65536)
Restart the gateway
2. On the SYSLOG Server request the respective SYSLOG Admin to add the below line into collector.properties config file and then restart the collector.
collector.syslog.udp.readBufferSize = 65535
Now try writing more than 2048 characters into SYSLOG from API Gateway, it should work.