facing issue while starting the data server

Hi All,

while starting data server, i am facing the below error :

] INFO com.appian.data.TopologyFactory  - Loading topology /usr/local/appian/data-server/conf/appian-topology.xml

291 [main] INFO com.appian.data.server.config.CustomPropertiesConfiguration  - Configuration file custom.properties does not exist. Default settings will be used.

304 [main] INFO com.appian.data.server.Watchdog  - Initializing log4j (processName=wd-5400, logsDir=/usr/local/appian/data-server/../logs/data-server) from /usr/local/appian/data-server/conf/log4j.properties

2018-09-21 08:30:27,106 wd-5400 [main] INFO  com.appian.data.server.JvmStarter - Starting JVM: /usr/java/jdk1.8.0_181-amd64/jre/bin/java -server -Duser.timezone=GMT -Xms64m -Xmx128m -Dds.home=/usr/local/appian/data-server -cp /usr/local/appian/data-server/lib/appian-data-server-classpath-0.80.2.jar com.appian.data.server.Watchdog -f

Killed

Appian version : 18.2

Regards

Abhay