params API does not take start as a mandatory option

dataqa@lda01:~$ fip -name ProcessWfTest-agregator-coord16-4c6acab7 -params 
Consolidated Status: SUCCEEDED

Instances:
Instance		Cluster		SourceCluster		Status		Start		End		Details					Log
-----------------------------------------------------------------------------------------------
2015-12-30T09:40Z	ProcessWfTest-corp-ab9d03ff	-	KILLED	2015-12-30T09:51Z	2015-12-30T09:52Z	-	-
Workflow params
fileTime=${formatTime(dateOffset(instanceTime(), 1, 'DAY'), 'yyyy-MMM-dd')}
cluster=ProcessWfTest-corp-ab9d03ff
availabilityFlag=NA
falconDataOperation=GENERATE
falconInputFeeds=NONE
feedNames=NONE
colo.name=ua1
shouldRecord=false
falcon.libpath=/tmp/falcon-regression-working/lib
mapreduce.job.user.name=dataqa
feedInstancePaths=NONE
systemJMSNotificationEnabled=false
brokerImplClass=org.apache.activemq.ActiveMQConnectionFactory
userBrokerImplClass=org.apache.activemq.ActiveMQConnectionFactory
entityName=ProcessWfTest-agregator-coord16-4c6acab7
jobTracker=192.168.138.236:8021
userWorkflowVersion=1.0
workflowEngineUrl=http://192.168.138.236:11000/oozie/
jobPriority=NORMAL
ENTITY_NAME=FALCON_PROCESS_DEFAULT_ProcessWfTest-agregator-coord16-4c6acab7
nameNode=hdfs://192.168.138.236:8020
nominalTime=2015-12-30-09-40
oozie.libpath=/tmp/falcon-regression-staging/falcon/workflows/process/ProcessWfTest-agregator-coord16-4c6acab7/81a5ca549f5b83f632a6afe06e404562_1451468116110/lib
oozie.use.system.libpath=true
entityType=PROCESS
srcClusterName=NA
userWorkflowEngine=oozie
oozie.wf.rerun.failnodes=true
timeStamp=2015-12-30-09-40
brokerUrl=tcp://localhost:61616
field1=value1
oozie.wf.application.path=hdfs://192.168.138.236:8020/tmp/falcon-regression-staging/falcon/workflows/process/ProcessWfTest-agregator-coord16-4c6acab7/81a5ca549f5b83f632a6afe06e404562_1451468116110
queueName=default
brokerTTL=4320
userWorkflowName=ProcessWfTest-agregator-coord16-4c6acab7-workflow
datasource=NA
ENTITY_PATH=/tmp/falcon-regression-staging/falcon/workflows/process/ProcessWfTest-agregator-coord16-4c6acab7/81a5ca549f5b83f632a6afe06e404562_1451468116110
userJMSNotificationEnabled=true
userBrokerUrl=tcp://192.168.138.236:61616?daemon=true
falconInPaths=NONE
user=${user()}
field2=value2
logDir=hdfs://192.168.138.236:8020/tmp/falcon-regression-staging/falcon/workflows/process/ProcessWfTest-agregator-coord16-4c6acab7/logs


Additional Information:
Response: ua1/PARAMS
Request Id: ua1/362835397@qtp-690339675-11 - 513807ee-170b-4f1f-a2f7-45ca0f51a598