Openfire-4.5.1 & Openfire Meetings plugin 0.9.5, connecting for Meetings taking much time when request done from browsers

Openfire Plugins openfire-meetings
1

When doing request from browsers to connect in meeting (https://ip:7443:/ofmeet/harsh) it’s taking few minutes to load, java memory increases from 8%(idle state) to 15-25% approximately just when request is done.
Java version: 1.8.0_151 Oracle Corporation – OpenJDK 64-Bit Server VM
OS: Centos 7.6

So, to solve above problem tried updating java verion to 11.0.7 Oracle Corporation – OpenJDK 64-Bit Server VM.
But then OF-Meetings loads in 20-30 seconds & java memory also not increases as above problem, but audio and video not working in meetings for that see logs as below:

Below are logs after updating java:
2020.06.10 12:09:34 INFO [org.jitsi.util.concurrent.RecurringRunnableExecutor.thread-org.jitsi.videobridge.health.Health]: org.jitsi.videobridge.Videobridge - CAT=stat create_conf,conf_id=22670913994efe16 conf_name=null,logging=false,conf_count=1,ch_count=0,v_streams=0
2020.06.10 12:09:34 ERROR [org.jitsi.util.concurrent.RecurringRunnableExecutor.thread-org.jitsi.videobridge.health.Health]: org.jitsi.util.concurrent.RecurringRunnableExecutor - The invocation of the method org.jitsi.videobridge.health.Health.run() threw an exception.
java.lang.NoClassDefFoundError: Could not initialize class java.net.PlainDatagramSocketImpl
at java.net.DefaultDatagramSocketImplFactory.createDatagramSocketImpl(DefaultDatagramSocketImplFactory.java:72) ~[?:?]
at java.net.DatagramSocket.createImpl(DatagramSocket.java:333) ~[?:?]
at java.net.DatagramSocket.(DatagramSocket.java:241) ~[?:?]
at java.net.DatagramSocket.(DatagramSocket.java:198) ~[?:?]
at org.ice4j.socket.MergingDatagramSocket.(MergingDatagramSocket.java:120) ~[ice4j-2.0.0-20181213.100259-20.jar:?]
at org.ice4j.ice.ComponentSocket.(ComponentSocket.java:83) ~[ice4j-2.0.0-20181213.100259-20.jar:?]
at org.ice4j.ice.Component.(Component.java:209) ~[ice4j-2.0.0-20181213.100259-20.jar:?]
at org.ice4j.ice.IceMediaStream.createComponent(IceMediaStream.java:192) ~[ice4j-2.0.0-20181213.100259-20.jar:?]
at org.ice4j.ice.Agent.createComponent(Agent.java:590) ~[ice4j-2.0.0-20181213.100259-20.jar:?]
at org.jitsi.videobridge.IceUdpTransportManager.createIceAgent(IceUdpTransportManager.java:1081) ~[jitsi-videobridge-1.1-20190125.162313-103.jar:?]
at org.jitsi.videobridge.IceUdpTransportManager.(IceUdpTransportManager.java:565) ~[jitsi-videobridge-1.1-20190125.162313-103.jar:?]
at org.jitsi.videobridge.IceUdpTransportManager.(IceUdpTransportManager.java:526) ~[jitsi-videobridge-1.1-20190125.162313-103.jar:?]
at org.jitsi.videobridge.Channel.createTransportManager(Channel.java:322) ~[jitsi-videobridge-1.1-20190125.162313-103.jar:?]
at org.jitsi.videobridge.Channel.initialize(Channel.java:673) ~[jitsi-videobridge-1.1-20190125.162313-103.jar:?]
at org.jitsi.videobridge.RtpChannel.initialize(RtpChannel.java:891) ~[jitsi-videobridge-1.1-20190125.162313-103.jar:?]
at org.jitsi.videobridge.Content.createRtpChannel(Content.java:339) ~[jitsi-videobridge-1.1-20190125.162313-103.jar:?]
at org.jitsi.videobridge.Content.createRtpChannel(Content.java:263) ~[jitsi-videobridge-1.1-20190125.162313-103.jar:?]
at org.jitsi.videobridge.health.Health.check(Health.java:152) ~[jitsi-videobridge-1.1-20190125.162313-103.jar:?]
at org.jitsi.videobridge.health.Health.doCheck(Health.java:244) ~[jitsi-videobridge-1.1-20190125.162313-103.jar:?]
at org.jitsi.videobridge.health.Health.doRun(Health.java:495) ~[jitsi-videobridge-1.1-20190125.162313-103.jar:?]
at org.jitsi.util.concurrent.PeriodicRunnableWithObject.run(PeriodicRunnableWithObject.java:87) ~[libjitsi-1.0-20190128.210332-374.jar:?]
at org.jitsi.util.concurrent.RecurringRunnableExecutor.run(RecurringRunnableExecutor.java:216) [libjitsi-1.0-20190128.210332-374.jar:?]
at org.jitsi.util.concurrent.RecurringRunnableExecutor.runInThread(RecurringRunnableExecutor.java:292) [libjitsi-1.0-20190128.210332-374.jar:?]
at org.jitsi.util.concurrent.RecurringRunnableExecutor.access$000(RecurringRunnableExecutor.java:36) [libjitsi-1.0-20190128.210332-374.jar:?]
at org.jitsi.util.concurrent.RecurringRunnableExecutor$1.run(RecurringRunnableExecutor.java:328) [libjitsi-1.0-20190128.210332-374.jar:?]

Additionally have uninstalled Openfire-4.5.1 and installed Openfire-4.5.2 but same problem persists for joining Openfire meetings from browsers it keeps on loading for few minutes.

2

I didn’t find a solution, and I didn’t want to install new. So I said okay good bye openfire, I used it only as familiy chat and for international calls on trips.
I left the openfire server run and last week after an ubuntu 18.04 OS update I tried to reach openfire login site and it worked. I logged in and had openfire meetings running - but sorry I don’t know why. I never had a self healing on the server on any problem before!

3

My Openfire Meetings also running but when request done from browser for loading it takes few minutes then it works normal for audio & video sharing between users.

Ok Thanks.