Openfire 4.5.2 multiple session end

Hi, today I updated my server to version 4.5.2
All 190 users reconnected, but after about 2 hours about 100 sessions were closed.
As a result, 93 users remained. The rest had to close Spark and run it again.
All customers of Spark 2.8.3.
Log:

2020.05.19 14:49:19 WARN [socket_c2s-thread-2]: org.jivesoftware.openfire.net.StanzaHandler - Ignoring available presence packet of closed session:
<presence id="Maz7R-97093">
<status>Отошел</status>
<priority>0</priority>
<show>away</show>
<x xmlns="vcard-temp:x:update">
<photo>30893de4b37337475ff1983bba750d3d26f94eb4</photo>
</x>
<x xmlns="jabber:x:avatar">
<hash>30893de4b37337475ff1983bba750d3d26f94eb4</hash>
</x>
<c xmlns="http://jabber.org/protocol/caps" hash="sha-1" node="http://www.igniterealtime.org/projects/smack" ver="TJuVIXqTCVfJSthaPu4MtTbaf9A="></c>
</presence>
2020.05.19 14:49:19 WARN [socket_c2s-thread-15]: org.jivesoftware.openfire.net.StanzaHandler - Ignoring available presence packet of closed session:
<presence id="le30f-10">
<status>В сети</status>
<priority>1</priority>
<x xmlns="vcard-temp:x:update">
<photo>81bbe4c6091e4fbf2ba14fa2e7e63980e7e37ad8</photo>
</x>
<x xmlns="jabber:x:avatar">
<hash>81bbe4c6091e4fbf2ba14fa2e7e63980e7e37ad8</hash>
</x>
<c xmlns="http://jabber.org/protocol/caps" hash="sha-1" node="http://www.igniterealtime.org/projects/smack" ver="TJuVIXqTCVfJSthaPu4MtTbaf9A="></c>
</presence>
2020.05.19 14:49:19 WARN [socket_c2s-thread-15]: org.jivesoftware.openfire.net.StanzaHandler - Ignoring available presence packet of closed session:
<presence id="le30f-20151">
<status>Отошел</status>
<priority>0</priority>
<show>away</show>
<x xmlns="vcard-temp:x:update">
<photo>81bbe4c6091e4fbf2ba14fa2e7e63980e7e37ad8</photo>
</x>
<x xmlns="jabber:x:avatar">
<hash>81bbe4c6091e4fbf2ba14fa2e7e63980e7e37ad8</hash>
</x>
<c xmlns="http://jabber.org/protocol/caps" hash="sha-1" node="http://www.igniterealtime.org/projects/smack" ver="TJuVIXqTCVfJSthaPu4MtTbaf9A="></c>
</presence>
2020.05.19 14:49:20 WARN [socket_c2s-thread-6]: org.jivesoftware.openfire.net.StanzaHandler - Ignoring available presence packet of closed session:
<presence id="6i285-104272">
<status>Отошел</status>
<priority>0</priority>
<show>away</show>
<x xmlns="vcard-temp:x:update">
<photo>9b14182955c42b8771901bc581b861c4a215a35a</photo>
</x>
<x xmlns="jabber:x:avatar">
<hash>9b14182955c42b8771901bc581b861c4a215a35a</hash>
</x>
<c xmlns="http://jabber.org/protocol/caps" hash="sha-1" node="http://www.igniterealtime.org/projects/smack" ver="TJuVIXqTCVfJSthaPu4MtTbaf9A="></c>
</presence>
2020.05.19 14:49:20 WARN [socket_c2s-thread-9]: org.jivesoftware.openfire.net.StanzaHandler - Ignoring available presence packet of closed session:
<presence id="I53WY-10507">
<status>Отошел</status>
<priority>0</priority>
<show>away</show>
<x xmlns="vcard-temp:x:update">
<photo>0d8670be505cd804c4e6264d954155e142abe141</photo>
</x>
<x xmlns="jabber:x:avatar">
<hash>0d8670be505cd804c4e6264d954155e142abe141</hash>
</x>
<c xmlns="http://jabber.org/protocol/caps" hash="sha-1" node="http://www.igniterealtime.org/projects/smack" ver="TJuVIXqTCVfJSthaPu4MtTbaf9A="></c>
</presence>
2020.05.19 14:49:20 WARN [socket_c2s-thread-3]: org.jivesoftware.openfire.net.StanzaHandler - Ignoring available presence packet of closed session:
<presence id="AbrO3-10">
<status>В сети</status>
<priority>1</priority>
<x xmlns="vcard-temp:x:update">
<photo>11bfc3151182e258f668391949ac76fd2e6be532</photo>
</x>
<x xmlns="jabber:x:avatar">
<hash>11bfc3151182e258f668391949ac76fd2e6be532</hash>
</x>
<c xmlns="http://jabber.org/protocol/caps" hash="sha-1" node="http://www.igniterealtime.org/projects/smack" ver="TJuVIXqTCVfJSthaPu4MtTbaf9A="></c>
</presence>
2020.05.19 14:49:20 WARN [socket_c2s-thread-8]: org.jivesoftware.openfire.net.StanzaHandler - Ignoring available presence packet of closed session:
<presence id="lVVpJ-9388">
<status>Отошел</status>
<priority>0</priority>
<show>away</show>
<c xmlns="http://jabber.org/protocol/caps" hash="sha-1" node="http://www.igniterealtime.org/projects/smack" ver="TJuVIXqTCVfJSthaPu4MtTbaf9A="></c>
<x xmlns="vcard-temp:x:update">
<photo>ec4839fdc4836b8a76164ea3d4d613f27bc9b704</photo>
</x>
<x xmlns="jabber:x:avatar">
<hash>ec4839fdc4836b8a76164ea3d4d613f27bc9b704</hash>
</x>
</presence>
2020.05.19 14:49:20 WARN [socket_c2s-thread-8]: org.jivesoftware.openfire.net.StanzaHandler - Ignoring available presence packet of closed session:
<presence id="lVVpJ-10">
<status>В сети</status>
<priority>1</priority>
<c xmlns="http://jabber.org/protocol/caps" hash="sha-1" node="http://www.igniterealtime.org/projects/smack" ver="TJuVIXqTCVfJSthaPu4MtTbaf9A="></c>
<x xmlns="vcard-temp:x:update">
<photo>ec4839fdc4836b8a76164ea3d4d613f27bc9b704</photo>
</x>
<x xmlns="jabber:x:avatar">
<hash>ec4839fdc4836b8a76164ea3d4d613f27bc9b704</hash>
</x>
</presence>
2020.05.19 14:49:20 WARN [socket_c2s-thread-16]: org.jivesoftware.openfire.net.StanzaHandler - Ignoring available presence packet of closed session:
<presence id="e4bZR-10">
<status>В сети</status>
<priority>1</priority>
<c xmlns="http://jabber.org/protocol/caps" hash="sha-1" node="http://www.igniterealtime.org/projects/smack" ver="TJuVIXqTCVfJSthaPu4MtTbaf9A="></c>
<x xmlns="vcard-temp:x:update">
<photo>3431566f0b7b9cc4ace8cd5285f9d180c6d213e2</photo>
</x>
<x xmlns="jabber:x:avatar">
<hash>3431566f0b7b9cc4ace8cd5285f9d180c6d213e2</hash>
</x>
</presence>
2020.05.19 14:49:20 WARN [socket_c2s-thread-13]: org.jivesoftware.openfire.net.StanzaHandler - Ignoring available presence packet of closed session:
<presence id="CCf9m-104343">
<status>Отошел</status>
<priority>0</priority>
<show>away</show>
<x xmlns="vcard-temp:x:update">
<photo>7dcf050bb62a8f103223a2a0fb284059c9976591</photo>
</x>
<x xmlns="jabber:x:avatar">
<hash>7dcf050bb62a8f103223a2a0fb284059c9976591</hash>
</x>
<c xmlns="http://jabber.org/protocol/caps" hash="sha-1" node="http://www.igniterealtime.org/projects/smack" ver="TJuVIXqTCVfJSthaPu4MtTbaf9A="></c>
</presence>
2020.05.19 14:49:20 WARN [socket_c2s-thread-13]: org.jivesoftware.openfire.net.StanzaHandler - Ignoring available presence packet of closed session:
<presence id="CCf9m-10">
<status>В сети</status>
<priority>1</priority>
<x xmlns="vcard-temp:x:update">
<photo>7dcf050bb62a8f103223a2a0fb284059c9976591</photo>
</x>
<x xmlns="jabber:x:avatar">
<hash>7dcf050bb62a8f103223a2a0fb284059c9976591</hash>
</x>
<c xmlns="http://jabber.org/protocol/caps" hash="sha-1" node="http://www.igniterealtime.org/projects/smack" ver="TJuVIXqTCVfJSthaPu4MtTbaf9A="></c>
</presence>
2020.05.19 14:49:20 WARN [socket_c2s-thread-2]: org.jivesoftware.openfire.net.StanzaHandler - Ignoring available presence packet of closed session:
<presence id="B3M63-100110">
<status>Отошел</status>
<priority>0</priority>
<show>away</show>
<x xmlns="vcard-temp:x:update">
<photo>41a1ff0d07bf54ae539b2f14f5d957205684762c</photo>
</x>
<x xmlns="jabber:x:avatar">
<hash>41a1ff0d07bf54ae539b2f14f5d957205684762c</hash>
</x>
<c xmlns="http://jabber.org/protocol/caps" hash="sha-1" node="http://www.igniterealtime.org/projects/smack" ver="TJuVIXqTCVfJSthaPu4MtTbaf9A="></c>
</presence>
2020.05.19 14:49:20 WARN [socket_c2s-thread-2]: org.jivesoftware.openfire.net.StanzaHandler - Ignoring available presence packet of closed session:
<presence id="B3M63-10">
<status>В сети</status>
<priority>1</priority>
<x xmlns="vcard-temp:x:update">
<photo>41a1ff0d07bf54ae539b2f14f5d957205684762c</photo>
</x>
<x xmlns="jabber:x:avatar">
<hash>41a1ff0d07bf54ae539b2f14f5d957205684762c</hash>
</x>
<c xmlns="http://jabber.org/protocol/caps" hash="sha-1" node="http://www.igniterealtime.org/projects/smack" ver="TJuVIXqTCVfJSthaPu4MtTbaf9A="></c>
</presence>
2020.05.19 14:49:21 WARN [socket_c2s-thread-7]: org.jivesoftware.openfire.net.StanzaHandler - Ignoring available presence packet of closed session:
<presence id="VguwS-1628">
<status>Недоступен</status>
<priority>0</priority>
<show>xa</show>
<c xmlns="http://jabber.org/protocol/caps" hash="sha-1" node="http://www.igniterealtime.org/projects/smack" ver="TJuVIXqTCVfJSthaPu4MtTbaf9A="></c>
<x xmlns="vcard-temp:x:update">
<photo>97c9fa2d0d557f305b4589f9db299aa4a788930f</photo>
</x>
<x xmlns="jabber:x:avatar">
<hash>97c9fa2d0d557f305b4589f9db299aa4a788930f</hash>
</x>
</presence>
2020.05.19 14:49:21 WARN [socket_c2s-thread-7]: org.jivesoftware.openfire.net.StanzaHandler - Ignoring available presence packet of closed session:
<presence id="VguwS-1628">
<status>Недоступен</status>
<priority>0</priority>
<show>xa</show>
<c xmlns="http://jabber.org/protocol/caps" hash="sha-1" node="http://www.igniterealtime.org/projects/smack" ver="TJuVIXqTCVfJSthaPu4MtTbaf9A="></c>
<x xmlns="vcard-temp:x:update">
<photo>97c9fa2d0d557f305b4589f9db299aa4a788930f</photo>
</x>
<x xmlns="jabber:x:avatar">
<hash>97c9fa2d0d557f305b4589f9db299aa4a788930f</hash>
</x>
</presence>
2020.05.19 14:49:21 WARN [socket_c2s-thread-2]: org.jivesoftware.openfire.net.StanzaHandler - Ignoring available presence packet of closed session:
<presence id="WdJ4i-9271">
<status>Отошел</status>
<priority>0</priority>
<show>away</show>
<c xmlns="http://jabber.org/protocol/caps" hash="sha-1" node="http://www.igniterealtime.org/projects/smack" ver="TJuVIXqTCVfJSthaPu4MtTbaf9A="></c>
<x xmlns="vcard-temp:x:update">
<photo>c1ef1b36e248791ee1173bddb384f467bdc65e48</photo>
</x>
<x xmlns="jabber:x:avatar">
<hash>c1ef1b36e248791ee1173bddb384f467bdc65e48</hash>
</x>
</presence>
2020.05.19 14:49:22 WARN [socket_c2s-thread-5]: org.jivesoftware.openfire.net.StanzaHandler - Ignoring available presence packet of closed session:
<presence id="FmsH3-92249">
<status>В сети</status>
<priority>1</priority>
<x xmlns="vcard-temp:x:update">
<photo>a2eff982195c5b4bf61020063cd1d08b73e1d0e6</photo>
</x>
<x xmlns="jabber:x:avatar">
<hash>a2eff982195c5b4bf61020063cd1d08b73e1d0e6</hash>
</x>
<c xmlns="http://jabber.org/protocol/caps" hash="sha-1" node="http://www.igniterealtime.org/projects/smack" ver="TJuVIXqTCVfJSthaPu4MtTbaf9A="></c>
</presence>
2020.05.19 14:49:22 WARN [socket_c2s-thread-5]: org.jivesoftware.openfire.net.StanzaHandler - Ignoring available presence packet of closed session:
<presence id="FmsH3-105079">
<status>Отошел</status>
<priority>0</priority>
<show>away</show>
<x xmlns="vcard-temp:x:update">
<photo>a2eff982195c5b4bf61020063cd1d08b73e1d0e6</photo>
</x>
<x xmlns="jabber:x:avatar">
<hash>a2eff982195c5b4bf61020063cd1d08b73e1d0e6</hash>
</x>
<c xmlns="http://jabber.org/protocol/caps" hash="sha-1" node="http://www.igniterealtime.org/projects/smack" ver="TJuVIXqTCVfJSthaPu4MtTbaf9A="></c>
</presence>
2020.05.19 14:49:22 WARN [socket_c2s-thread-9]: org.jivesoftware.openfire.net.StanzaHandler - Ignoring available presence packet of closed session:
<presence id="r4GJD-10">
<status>В сети</status>
<priority>1</priority>
<x xmlns="vcard-temp:x:update">
<photo>d1fc2b224821701660dff12b002e5c7bf88ccc8a</photo>
</x>
<x xmlns="jabber:x:avatar">
<hash>d1fc2b224821701660dff12b002e5c7bf88ccc8a</hash>
</x>
<c xmlns="http://jabber.org/protocol/caps" hash="sha-1" node="http://www.igniterealtime.org/projects/smack" ver="TJuVIXqTCVfJSthaPu4MtTbaf9A="></c>
</presence>
2020.05.19 14:49:22 WARN [socket_c2s-thread-8]: org.jivesoftware.openfire.net.StanzaHandler - Ignoring available presence packet of closed session:
<presence id="G2SF6-100147">
<status>Отошел</status>
<priority>0</priority>
<show>away</show>
<c xmlns="http://jabber.org/protocol/caps" hash="sha-1" node="http://www.igniterealtime.org/projects/smack" ver="TJuVIXqTCVfJSthaPu4MtTbaf9A="></c>
<x xmlns="vcard-temp:x:update">
<photo>937a1787bcbd706f5eb925a333bc5413cf7c8fcc</photo>
</x>
<x xmlns="jabber:x:avatar">
<hash>937a1787bcbd706f5eb925a333bc5413cf7c8fcc</hash>
</x>
</presence>
2020.05.19 14:49:22 WARN [socket_c2s-thread-8]: org.jivesoftware.openfire.net.StanzaHandler - Ignoring available presence packet of closed session:
<presence id="G2SF6-10">
<status>В сети</status>
<priority>1</priority>
<c xmlns="http://jabber.org/protocol/caps" hash="sha-1" node="http://www.igniterealtime.org/projects/smack" ver="TJuVIXqTCVfJSthaPu4MtTbaf9A="></c>
<x xmlns="vcard-temp:x:update">
<photo>937a1787bcbd706f5eb925a333bc5413cf7c8fcc</photo>
</x>
<x xmlns="jabber:x:avatar">
<hash>937a1787bcbd706f5eb925a333bc5413cf7c8fcc</hash>
</x>
</presence>
2020.05.19 14:49:22 WARN [socket_c2s-thread-2]: org.jivesoftware.openfire.net.StanzaHandler - Ignoring available presence packet of closed session:
<presence id="Re0U7-101233">
<status>Отошел</status>
<priority>0</priority>
<show>away</show>
<x xmlns="vcard-temp:x:update">
<photo>7c20f02943baa50b9bb127f74a5709153670e7d9</photo>
</x>
<x xmlns="jabber:x:avatar">
<hash>7c20f02943baa50b9bb127f74a5709153670e7d9</hash>
</x>
<c xmlns="http://jabber.org/protocol/caps" hash="sha-1" node="http://www.igniterealtime.org/projects/smack" ver="TJuVIXqTCVfJSthaPu4MtTbaf9A="></c>
</presence>
2020.05.19 14:49:22 WARN [socket_c2s-thread-5]: org.jivesoftware.openfire.net.StanzaHandler - Ignoring available presence packet of closed session:
<presence id="vWS8P-104691">
<status>Отошел</status>
<priority>0</priority>
<show>away</show>
<x xmlns="vcard-temp:x:update">
<photo>14ab37b73e674e41a9b01877993c487e429dcc5c</photo>
</x>
<x xmlns="jabber:x:avatar">
<hash>14ab37b73e674e41a9b01877993c487e429dcc5c</hash>
</x>
<c xmlns="http://jabber.org/protocol/caps" hash="sha-1" node="http://www.igniterealtime.org/projects/smack" ver="TJuVIXqTCVfJSthaPu4MtTbaf9A="></c>
</presence>
2020.05.19 14:49:22 WARN [socket_c2s-thread-5]: org.jivesoftware.openfire.net.StanzaHandler - Ignoring available presence packet of closed session:
<presence id="vWS8P-10">
<status>В сети</status>
<priority>1</priority>
<x xmlns="vcard-temp:x:update">
<photo>14ab37b73e674e41a9b01877993c487e429dcc5c</photo>
</x>
<x xmlns="jabber:x:avatar">
<hash>14ab37b73e674e41a9b01877993c487e429dcc5c</hash>
</x>
<c xmlns="http://jabber.org/protocol/caps" hash="sha-1" node="http://www.igniterealtime.org/projects/smack" ver="TJuVIXqTCVfJSthaPu4MtTbaf9A="></c>
</presence>
2020.05.19 14:49:22 WARN [socket_c2s-thread-6]: org.jivesoftware.openfire.nio.ConnectionHandler - Closing connection due to exception in session: (0x000000C5: nio socket, server, null => 0.0.0.0/0.0.0.0:5222)
java.io.IOException: Connection reset by peer
at sun.nio.ch.FileDispatcherImpl.read0(Native Method) ~[?:1.8.0_222]
at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:39) ~[?:1.8.0_222]
at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223) ~[?:1.8.0_222]
at sun.nio.ch.IOUtil.read(IOUtil.java:197) ~[?:1.8.0_222]
at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:380) ~[?:1.8.0_222]
at org.apache.mina.transport.socket.nio.NioProcessor.read(NioProcessor.java:378) ~[mina-core-2.1.3.jar:?]
at org.apache.mina.transport.socket.nio.NioProcessor.read(NioProcessor.java:47) ~[mina-core-2.1.3.jar:?]
at org.apache.mina.core.polling.AbstractPollingIoProcessor.read(AbstractPollingIoProcessor.java:519) ~[mina-core-2.1.3.jar:?]
at org.apache.mina.core.polling.AbstractPollingIoProcessor.access$1200(AbstractPollingIoProcessor.java:68) ~[mina-core-2.1.3.jar:?]
at org.apache.mina.core.polling.AbstractPollingIoProcessor$Processor.process(AbstractPollingIoProcessor.java:1222) ~[mina-core-2.1.3.jar:?]
at org.apache.mina.core.polling.AbstractPollingIoProcessor$Processor.process(AbstractPollingIoProcessor.java:1211) ~[mina-core-2.1.3.jar:?]
at org.apache.mina.core.polling.AbstractPollingIoProcessor$Processor.run(AbstractPollingIoProcessor.java:683) ~[mina-core-2.1.3.jar:?]
at org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:64) ~[mina-core-2.1.3.jar:?]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) ~[?:1.8.0_222]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) ~[?:1.8.0_222]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_222]
2020.05.19 14:49:22 WARN [socket_c2s-thread-11]: org.jivesoftware.openfire.net.StanzaHandler - Ignoring available presence packet of closed session:
<presence id="8VoM8-99955">
<status>Отошел</status>
<priority>0</priority>
<show>away</show>
<x xmlns="vcard-temp:x:update">
<photo>d647091267f06af3c6c0ad65d47b2bbeeaf2bf17</photo>
</x>
<x xmlns="jabber:x:avatar">
<hash>d647091267f06af3c6c0ad65d47b2bbeeaf2bf17</hash>
</x>
<c xmlns="http://jabber.org/protocol/caps" hash="sha-1" node="http://www.igniterealtime.org/projects/smack" ver="TJuVIXqTCVfJSthaPu4MtTbaf9A="></c>
</presence>
2020.05.19 14:49:24 ERROR [socket_c2s-thread-14]: org.jivesoftware.openfire.ldap.LdapManager - An exception occurred while trying to retrieve a list of results from the LDAP server
javax.naming.ServiceUnavailableException: srvdc3.coleman.local:636; socket closed
at com.sun.jndi.ldap.Connection.readReply(Connection.java:471) ~[?:1.8.0_222]
at com.sun.jndi.ldap.LdapClient.getSearchReply(LdapClient.java:632) ~[?:1.8.0_222]
at com.sun.jndi.ldap.LdapClient.search(LdapClient.java:555) ~[?:1.8.0_222]
at com.sun.jndi.ldap.LdapCtx.doSearch(LdapCtx.java:1985) ~[?:1.8.0_222]
at com.sun.jndi.ldap.LdapCtx.searchAux(LdapCtx.java:1844) ~[?:1.8.0_222]
at com.sun.jndi.ldap.LdapCtx.c_search(LdapCtx.java:1769) ~[?:1.8.0_222]
at com.sun.jndi.toolkit.ctx.ComponentDirContext.p_search(ComponentDirContext.java:392) ~[?:1.8.0_222]
at com.sun.jndi.toolkit.ctx.PartialCompositeDirContext.search(PartialCompositeDirContext.java:358) ~[?:1.8.0_222]
at com.sun.jndi.toolkit.ctx.PartialCompositeDirContext.search(PartialCompositeDirContext.java:341) ~[?:1.8.0_222]
at javax.naming.directory.InitialDirContext.search(InitialDirContext.java:267) ~[?:1.8.0_222]
at org.jivesoftware.openfire.ldap.LdapManager.retrieveList(LdapManager.java:2144) [xmppserver-4.5.2.jar:4.5.2]
at org.jivesoftware.openfire.ldap.LdapManager.retrieveList(LdapManager.java:2075) [xmppserver-4.5.2.jar:4.5.2]
at org.jivesoftware.openfire.ldap.LdapGroupProvider.search(LdapGroupProvider.java:259) [xmppserver-4.5.2.jar:4.5.2]
at org.jivesoftware.openfire.ldap.LdapGroupProvider.getGroupNames(LdapGroupProvider.java:207) [xmppserver-4.5.2.jar:4.5.2]
at org.jivesoftware.openfire.group.AbstractGroupProvider.getSharedGroupNames(AbstractGroupProvider.java:185) [xmppserver-4.5.2.jar:4.5.2]
at org.jivesoftware.openfire.group.GroupManager.getSharedGroups(GroupManager.java:505) [xmppserver-4.5.2.jar:4.5.2]
at org.jivesoftware.openfire.roster.RosterManager.getSharedGroups(RosterManager.java:202) [xmppserver-4.5.2.jar:4.5.2]
at org.jivesoftware.openfire.roster.Roster.<init>(Roster.java:102) [xmppserver-4.5.2.jar:4.5.2]
at org.jivesoftware.openfire.roster.RosterManager.getRoster(RosterManager.java:129) [xmppserver-4.5.2.jar:4.5.2]
at org.jivesoftware.openfire.handler.PresenceUpdateHandler.broadcastUpdate(PresenceUpdateHandler.java:308) [xmppserver-4.5.2.jar:4.5.2]
at org.jivesoftware.openfire.handler.PresenceUpdateHandler.process(PresenceUpdateHandler.java:151) [xmppserver-4.5.2.jar:4.5.2]
at org.jivesoftware.openfire.handler.PresenceUpdateHandler.process(PresenceUpdateHandler.java:134) [xmppserver-4.5.2.jar:4.5.2]
at org.jivesoftware.openfire.handler.PresenceUpdateHandler.process(PresenceUpdateHandler.java:202) [xmppserver-4.5.2.jar:4.5.2]
at org.jivesoftware.openfire.PresenceRouter.handle(PresenceRouter.java:143) [xmppserver-4.5.2.jar:4.5.2]
at org.jivesoftware.openfire.PresenceRouter.route(PresenceRouter.java:79) [xmppserver-4.5.2.jar:4.5.2]
at org.jivesoftware.openfire.spi.PacketRouterImpl.route(PacketRouterImpl.java:84) [xmppserver-4.5.2.jar:4.5.2]
at org.jivesoftware.openfire.net.StanzaHandler.processPresence(StanzaHandler.java:384) [xmppserver-4.5.2.jar:4.5.2]
at org.jivesoftware.openfire.net.ClientStanzaHandler.processPresence(ClientStanzaHandler.java:102) [xmppserver-4.5.2.jar:4.5.2]
at org.jivesoftware.openfire.net.StanzaHandler.process(StanzaHandler.java:285) [xmppserver-4.5.2.jar:4.5.2]
at org.jivesoftware.openfire.net.StanzaHandler.process(StanzaHandler.java:203) [xmppserver-4.5.2.jar:4.5.2]
at org.jivesoftware.openfire.nio.ConnectionHandler.messageReceived(ConnectionHandler.java:183) [xmppserver-4.5.2.jar:4.5.2]
at org.apache.mina.core.filterchain.DefaultIoFilterChain$TailFilter.messageReceived(DefaultIoFilterChain.java:1015) [mina-core-2.1.3.jar:?]
at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:650) [mina-core-2.1.3.jar:?]
at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1300(DefaultIoFilterChain.java:49) [mina-core-2.1.3.jar:?]
at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:1128) [mina-core-2.1.3.jar:?]
at org.apache.mina.core.filterchain.IoFilterAdapter.messageReceived(IoFilterAdapter.java:122) [mina-core-2.1.3.jar:?]
at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:650) [mina-core-2.1.3.jar:?]
at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1300(DefaultIoFilterChain.java:49) [mina-core-2.1.3.jar:?]
at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:1128) [mina-core-2.1.3.jar:?]
at org.apache.mina.filter.codec.ProtocolCodecFilter$ProtocolDecoderOutputImpl.flush(ProtocolCodecFilter.java:413) [mina-core-2.1.3.jar:?]
at org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(ProtocolCodecFilter.java:257) [mina-core-2.1.3.jar:?]
at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:650) [mina-core-2.1.3.jar:?]
at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1300(DefaultIoFilterChain.java:49) [mina-core-2.1.3.jar:?]
at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:1128) [mina-core-2.1.3.jar:?]
at org.apache.mina.core.filterchain.IoFilterEvent.fire(IoFilterEvent.java:106) [mina-core-2.1.3.jar:?]
at org.apache.mina.core.session.IoEvent.run(IoEvent.java:89) [mina-core-2.1.3.jar:?]
at org.apache.mina.filter.executor.OrderedThreadPoolExecutor$Worker.runTask(OrderedThreadPoolExecutor.java:766) [mina-core-2.1.3.jar:?]
at org.apache.mina.filter.executor.OrderedThreadPoolExecutor$Worker.runTasks(OrderedThreadPoolExecutor.java:758) [mina-core-2.1.3.jar:?]
at org.apache.mina.filter.executor.OrderedThreadPoolExecutor$Worker.run(OrderedThreadPoolExecutor.java:697) [mina-core-2.1.3.jar:?]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_222]

After about another hour, 40 sessions were closed, leaving a total of 60 users.
I was forced to return to version 4.5.1 for now.

what do you have for stream.management.active in your system properties?
if true, please set to false

I will check this on the test server and then on the production server and write about the results.

Disabling stream helped.
But in version 4.5.2, LDAP Avatar disappeared …