In logs there are too many exceptions “Connection reset by peer” . every second an exception like this is thrown
2019.05.16 10:10:41 WARN [socket_c2s-thread-10]: org.jivesoftware.openfire.nio.ConnectionHandler - Closing connection due to exception in session: (0x00001172: 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_212]
at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:39) ~[?:1.8.0_212]
at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223) ~[?:1.8.0_212]
at sun.nio.ch.IOUtil.read(IOUtil.java:197) ~[?:1.8.0_212]
at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:380) ~[?:1.8.0_212]
at org.apache.mina.transport.socket.nio.NioProcessor.read(NioProcessor.java:273) ~[mina-core-2.0.7.jar:?]
at org.apache.mina.transport.socket.nio.NioProcessor.read(NioProcessor.java:44) ~[mina-core-2.0.7.jar:?]
at org.apache.mina.core.polling.AbstractPollingIoProcessor.read(AbstractPollingIoProcessor.java:690) ~[mina-core-2.0.7.jar:?]
at org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:664) ~[mina-core-2.0.7.jar:?]
at org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:653) ~[mina-core-2.0.7.jar:?]
at org.apache.mina.core.polling.AbstractPollingIoProcessor.access$600(AbstractPollingIoProcessor.java:67) ~[mina-core-2.0.7.jar:?]
at org.apache.mina.core.polling.AbstractPollingIoProcessor$Processor.run(AbstractPollingIoProcessor.java:1124) ~[mina-core-2.0.7.jar:?]
at org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:64) ~[mina-core-2.0.7.jar:?]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) ~[?:1.8.0_212]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) ~[?:1.8.0_212]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_212]