【hive LLAP】Does the num of LLAP Daemons is decided by "hive2 --service llap -name llap_service -instances 5"?

[#1]

I start up LLAP with slider,and the shell command is

"hive2 --service llap -name llap_service -instances 5 -size 5g -loglevel INFO -args "-XX:MaxMetaspaceSize=128m -verbose:class -XX:+UseParNewGC -Xmn1g -XX:+UseConcMarkSweepGC -XX:+UseBiasedLocking -XX:+PerfDisableSharedMem" -cache 3g -executors 30 -iothreads 10 -slider-am-container-mb 3096

"

and then start LLAP with "llap-slider-07Aug2019/run.sh",logs like this:

then look into yarn application and hive-ui:

I have no idea why there is just one LLAP Daemon and "Live Instances" is zero? beacause the log of LLAP container indicates it is successfully started:

P.S.

my env: hive-2.3.0 hadoop-2.7.1 tez-0.9.2 slide-0.92.0

Does someone met the same question or have an idea?

Thanks.

[#2]

Questions added: IF argument "-instances" can decides the nums of LlapDamon，I don' t know why there just only one LlapDaemon in my cluster,even though I have set "-instances 5"