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Set the properties from a script: Setting your system properties in the startup script is ideal, because it ensures that you set the properties every time you start the server. To avoid having to modify the script each time you upgrade, the best approach is to create your own startup script that wraps the WSO2 startup script and adds the properties you want to set, rather than editing the WSO2 startup script directly.
Set the properties from an external registry: If you want to access properties from an external registry, you could create Java code that reads the properties at runtime from that registry. Be sure to store sensitive data such as username and password to connect to the registry in a properties file instead of in the Java code and secure the properties file with the secure vault.

Info

Once all the instructions given above are completed, you may see the following error in the start up logs when you run the DAS server.

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TID: [-1234] [] [2016-07-25 11:33:53,000] WARN {org.apache.hadoop.util.NativeCodeLoader} - Unable to load native-hadoop library for your platform... using builtin-java classes where applicable {org.apache.hadoop.util.NativeCodeLoader}

TID: [-1234] [] [2016-07-25 11:33:53,037] ERROR {org.apache.hadoop.util.Shell} - Failed to locate the winutils binary in the hadoop binary path {org.apache.hadoop.util.Shell}

java.io.IOException: Could not locate executable null\bin\winutils.exe in the Hadoop binaries.

at org.apache.hadoop.util.Shell.getQualifiedBinPath(Shell.java:355)

at org.apache.hadoop.util.Shell.getWinUtilsPath(Shell.java:370)

at org.apache.hadoop.util.Shell.<clinit>(Shell.java:363)

at org.apache.hadoop.util.StringUtils.<clinit>(StringUtils.java:79)

at org.apache.hadoop.security.Groups.parseStaticMapping(Groups.java:104)

at org.apache.hadoop.security.Groups.<init>(Groups.java:86)

at org.apache.hadoop.security.Groups.<init>(Groups.java:66)

at org.apache.hadoop.security.Groups.getUserToGroupsMappingService(Groups.java:280)

at org.apache.hadoop.security.UserGroupInformation.initialize(UserGroupInformation.java:271)

at org.apache.hadoop.security.UserGroupInformation.ensureInitialized(UserGroupInformation.java:248)

at org.apache.hadoop.security.UserGroupInformation.loginUserFromSubject(UserGroupInformation.java:763)

at org.apache.hadoop.security.UserGroupInformation.getLoginUser(UserGroupInformation.java:748)

at org.apache.hadoop.security.UserGroupInformation.getCurrentUser(UserGroupInformation.java:621)

at org.apache.spark.util.Utils$$anonfun$getCurrentUserName$1.apply(Utils.scala:2042)

at scala.Option.getOrElse(Option.scala:120)

at org.apache.spark.util.Utils$.getCurrentUserName(Utils.scala:2042)

at org.apache.spark.SecurityManager.<init>(SecurityManager.scala:212)

at org.apache.spark.deploy.master.Master$.startSystemAndActor(Master.scala:914)

at org.apache.spark.deploy.master.Master.startSystemAndActor(Master.scala)

at org.wso2.carbon.analytics.spark.core.internal.SparkAnalyticsExecutor.startMaster(SparkAnalyticsExecutor.java:419)

at org.wso2.carbon.analytics.spark.core.internal.SparkAnalyticsExecutor.runClusteredSetupLogic(SparkAnalyticsExecutor.java:248)

at org.wso2.carbon.analytics.spark.core.internal.SparkAnalyticsExecutor.initializeSparkServer(SparkAnalyticsExecutor.java:174)

at org.wso2.carbon.analytics.spark.core.internal.AnalyticsComponent.activate(AnalyticsComponent.java:71)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at org.eclipse.equinox.internal.ds.model.ServiceComponent.activate(ServiceComponent.java:260)

at org.eclipse.equinox.internal.ds.model.ServiceComponentProp.activate(ServiceComponentProp.java:146)

at org.eclipse.equinox.internal.ds.model.ServiceComponentProp.build(ServiceComponentProp.java:345)

at org.eclipse.equinox.internal.ds.InstanceProcess.buildComponent(InstanceProcess.java:620)

at org.eclipse.equinox.internal.ds.InstanceProcess.buildComponents(InstanceProcess.java:197)

at org.eclipse.equinox.internal.ds.Resolver.getEligible(Resolver.java:343)

at org.eclipse.equinox.internal.ds.SCRManager.serviceChanged(SCRManager.java:222)

at org.eclipse.osgi.internal.serviceregistry.FilteredServiceListener.serviceChanged(FilteredServiceListener.java:107)

at org.eclipse.osgi.framework.internal.core.BundleContextImpl.dispatchEvent(BundleContextImpl.java:861)

at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)

at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148)

at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEventPrivileged(ServiceRegistry.java:819)

at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEvent(ServiceRegistry.java:771)

at org.eclipse.osgi.internal.serviceregistry.ServiceRegistrationImpl.register(ServiceRegistrationImpl.java:130)

at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.registerService(ServiceRegistry.java:214)

at org.eclipse.osgi.framework.internal.core.BundleContextImpl.registerService(BundleContextImpl.java:433)

at org.eclipse.osgi.framework.internal.core.BundleContextImpl.registerService(BundleContextImpl.java:451)

at org.eclipse.osgi.framework.internal.core.BundleContextImpl.registerService(BundleContextImpl.java:950)

at org.wso2.carbon.analytics.dataservice.core.AnalyticsDataServiceComponent.activate(AnalyticsDataServiceComponent.java:66)