The memory usage of openvidu server increases continuously. This was verified using res field of htop command. I allocated 8GB of heap space but due to memory leak resident memory was reported as 9GB(htop command). Server logs are as below:-
[INFO] 2022-02-03 11:07:12,260 [SessionHandler-mdv78sqovkhu268rld341r485-e141780-t0] io.openvidu.server.rpc.RpcHandler - New Connection con_Jgs5tWMdFw in Session 19d10c2d2973f0bfbb04c2691e5d6211 with IP 189.203.37.106 and platform Android 29
[ERROR] 2022-02-03 11:07:12,260 [SessionHandler-mdv78sqovkhu268rld341r485-e141780-t0] io.openvidu.server.kurento.core.KurentoSessionManager - PARTICIPANT con_Jgs5tWMdFw: Error joining/creating session 19d10c2d2973f0bfbb04c2691e5d6211
io.openvidu.client.OpenViduException: There is no available Media Node where to initialize session ‘19d10c2d2973f0bfbb04c2691e5d6211’. Code: 204
at io.openvidu.server.kurento.core.KurentoSessionManager.selectMediaNode(KurentoSessionManager.java:1409)
at io.openvidu.server.kurento.core.KurentoSessionManager.joinRoom(KurentoSessionManager.java:133)
at io.openvidu.server.rpc.RpcHandler.joinRoom(RpcHandler.java:296)
at io.openvidu.server.rpc.RpcHandler.handleRequest(RpcHandler.java:119)
at org.kurento.jsonrpc.internal.JsonRpcHandlerManager.handleRequest(JsonRpcHandlerManager.java:142)
at org.kurento.jsonrpc.internal.server.ProtocolManager$3.run(ProtocolManager.java:218)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:829)
[INFO] 2022-02-03 11:07:12,276 [http-nio-0.0.0.0-5443-exec-96] io.openvidu.server.rest.SessionRestController - REST API: POST /openvidu/api/sessions/23e7969605bc8237f254622505cb3770/connection {session=23e7969605bc8237f254622505cb3770}
[INFO] 2022-02-03 11:07:12,276 [http-nio-0.0.0.0-5443-exec-96] io.openvidu.server.coturn.CoturnCredentialsService - Creating COTURN user
[INFO] 2022-02-03 11:07:12,278 [http-nio-0.0.0.0-5443-exec-124] io.openvidu.server.rest.SessionRestController - REST API: POST /openvidu/api/sessions/e14b6e4f19a9156d27732fa03876f841/connection {session=e14b6e4f19a9156d27732fa03876f841}
[INFO] 2022-02-03 11:07:12,278 [http-nio-0.0.0.0-5443-exec-124] io.openvidu.server.coturn.CoturnCredentialsService - Creating COTURN user
[INFO] 2022-02-03 11:07:12,286 [http-nio-0.0.0.0-5443-exec-46] io.openvidu.server.rest.SessionRestController - REST API: POST /openvidu/api/sessions/b38a0182101cfdc5dfd38af6a488b202/connection {session=b38a0182101cfdc5dfd38af6a488b202}
[INFO] 2022-02-03 11:07:12,286 [http-nio-0.0.0.0-5443-exec-46] io.openvidu.server.coturn.CoturnCredentialsService - Creating COTURN user
[INFO] 2022-02-03 11:07:12,343 [http-nio-0.0.0.0-5443-exec-198] io.openvidu.server.rest.SessionRestController - REST API: POST /openvidu/api/sessions/fe08a75f182b93b42fac9aba35ce2cf0/connection {session=fe08a75f182b93b42fac9aba35ce2cf0}
[INFO] 2022-02-03 11:07:12,343 [http-nio-0.0.0.0-5443-exec-198] io.openvidu.server.coturn.CoturnCredentialsService - Creating COTURN user
[INFO] 2022-02-03 11:07:12,573 [http-nio-0.0.0.0-5443-exec-32] io.openvidu.server.coturn.CoturnCredentialsService - COTURN user created: true
[INFO] 2022-02-03 11:07:12,574 [http-nio-0.0.0.0-5443-exec-36] io.openvidu.server.coturn.CoturnCredentialsService - COTURN user created: true
[INFO] 2022-02-03 11:07:12,577 [http-nio-0.0.0.0-5443-exec-33] io.openvidu.server.coturn.CoturnCredentialsService - Garbage collector cleaning turn log files at path /var/log/
[INFO] 2022-02-03 11:07:12,577 [http-nio-0.0.0.0-5443-exec-33] io.openvidu.server.coturn.CoturnCredentialsService - COTURN user created: true
[INFO] 2022-02-03 11:07:12,606 [jsonrpcTaskScheduler-1] io.openvidu.server.rpc.RpcHandler - After connection closed for WebSocket session: vfui957ahst860la8kma61rs49 - Status: null
[INFO] 2022-02-03 11:07:13,147 [http-nio-0.0.0.0-5443-exec-177] io.openvidu.server.config.HttpHandshakeInterceptor - New HttpSession F60582D4B02F5AA8400CCB872B967F67
[INFO] 2022-02-03 11:07:13,312 [http-nio-0.0.0.0-5443-exec-117] io.openvidu.server.config.HttpHandshakeInterceptor - New HttpSession 383079857DBA6A83DB9CA1C014E4EF7A
[INFO] 2022-02-03 11:07:13,404 [http-nio-0.0.0.0-5443-exec-188] io.openvidu.server.rest.SessionRestController - REST API: POST /openvidu/api/sessions/fba22974e60777f77be9f59d7a894a66/connection {session=fba22974e60777f77be9f59d7a894a66}
[INFO] 2022-02-03 11:07:13,404 [http-nio-0.0.0.0-5443-exec-188] io.openvidu.server.coturn.CoturnCredentialsService - Creating COTURN user
[INFO] 2022-02-03 11:07:13,435 [http-nio-0.0.0.0-5443-exec-131] io.openvidu.server.config.HttpHandshakeInterceptor - New HttpSession F8EA81C0FDC222129AF0E83D77275982
[INFO] 2022-02-03 11:07:18,433 [http-nio-0.0.0.0-5443-exec-104] io.openvidu.server.coturn.CoturnCredentialsService - COTURN user created: true
[INFO] 2022-02-03 11:07:18,434 [http-nio-0.0.0.0-5443-exec-46] io.openvidu.server.coturn.CoturnCredentialsService - COTURN user created: true
[INFO] 2022-02-03 11:07:18,435 [http-nio-0.0.0.0-5443-exec-198] io.openvidu.server.coturn.CoturnCredentialsService - COTURN user created: true
[INFO] 2022-02-03 11:07:18,435 [http-nio-0.0.0.0-5443-exec-167] io.openvidu.server.coturn.CoturnCredentialsService - COTURN user created: true
[INFO] 2022-02-03 11:07:18,435 [http-nio-0.0.0.0-5443-exec-58] io.openvidu.server.config.HttpHandshakeInterceptor - New HttpSession F9CD30D95F0401F7DE9EE7A411EAD47F
[INFO] 2022-02-03 11:07:18,435 [http-nio-0.0.0.0-5443-exec-96] io.openvidu.server.coturn.CoturnCredentialsService - COTURN user created: true
[INFO] 2022-02-03 11:07:18,435 [http-nio-0.0.0.0-5443-exec-146] io.openvidu.server.coturn.CoturnCredentialsService - COTURN user created: true
[INFO] 2022-02-03 11:07:18,435 [http-nio-0.0.0.0-5443-exec-124] io.openvidu.server.coturn.CoturnCredentialsService - COTURN user created: true
[INFO] 2022-02-03 11:07:18,435 [jsonrpcTaskScheduler-1] io.openvidu.server.rpc.RpcHandler - After connection closed for WebSocket session: kanqp4q4s6039dk62sub48akk - Status: null
[INFO] 2022-02-03 11:07:18,435 [http-nio-0.0.0.0-5443-exec-87] io.openvidu.server.coturn.CoturnCredentialsService - COTURN user created: true
[INFO] 2022-02-03 11:07:18,437 [http-nio-0.0.0.0-5443-exec-188] io.openvidu.server.coturn.CoturnCredentialsService - COTURN user created: true
[INFO] 2022-02-03 11:07:18,444 [http-nio-0.0.0.0-5443-exec-176] io.openvidu.server.coturn.CoturnCredentialsService - COTURN user created: true
[INFO] 2022-02-03 11:07:18,445 [http-nio-0.0.0.0-5443-exec-124] io.openvidu.server.rpc.RpcHandler - After connection established for WebSocket session: gshbb0smju6asv7rmufisvrl2p
[INFO] 2022-02-03 11:07:18,445 [jsonrpcTaskScheduler-1] io.openvidu.server.rpc.RpcHandler - After connection closed for WebSocket session: tgelb7csq9gpocqibso1noulq2 - Status: null
[INFO] 2022-02-03 11:07:18,445 [jsonrpcTaskScheduler-1] io.openvidu.server.rpc.RpcHandler - After connection closed for WebSocket session: r2fbrqlscl39ikh14jf73d1tq8 - Status: null
[INFO] 2022-02-03 11:07:18,445 [jsonrpcTaskScheduler-1] io.openvidu.server.rpc.RpcHandler - After connection closed for WebSocket session: h2a7es2l4nuv0c9qol17un97f7 - Status: null
[INFO] 2022-02-03 11:07:18,445 [jsonrpcTaskScheduler-1] io.openvidu.server.rpc.RpcHandler - After connection closed for WebSocket session: j3ccclgn0tpc858sdksrt09vj4 - Status: null
[INFO] 2022-02-03 11:07:18,446 [jsonrpcTaskScheduler-1] io.openvidu.server.rpc.RpcHandler - After connection closed for WebSocket session: 58gl4h9ge6cas9ru2ppni4i06u - Status: null
[INFO] 2022-02-03 11:07:18,446 [jsonrpcTaskScheduler-1] io.openvidu.server.rpc.RpcHandler - After connection closed for WebSocket session: quthh253iok3v00dnus1762048 - Status: null
[ERROR] 2022-02-03 11:07:18,446 [http-nio-0.0.0.0-5443-exec-51] io.openvidu.server.rpc.RpcHandler - Transport exception for WebSocket session: 1eg9j06s789i7rniv9f3h27la9 - Exception: null
[INFO] 2022-02-03 11:07:18,446 [http-nio-0.0.0.0-5443-exec-56] io.openvidu.server.rpc.RpcHandler - After connection established for WebSocket session: 1l7cckoke0utlbol10pqsahclr
[ERROR] 2022-02-03 11:07:18,447 [http-nio-0.0.0.0-5443-exec-51] io.openvidu.server.rpc.RpcHandler - Transport exception for WebSocket session: qco7tjn1qrcfrbg57s1pv70jad - Exception: null
[INFO] 2022-02-03 11:07:18,447 [http-nio-0.0.0.0-5443-exec-192] io.openvidu.server.coturn.CoturnCredentialsService - COTURN user created: true
[INFO] 2022-02-03 11:07:18,436 [http-nio-0.0.0.0-5443-exec-153] io.openvidu.server.coturn.CoturnCredentialsService - COTURN user created: true
[INFO] 2022-02-03 11:07:18,446 [jsonrpcTaskScheduler-1] io.openvidu.server.rpc.RpcHandler - After connection closed for WebSocket session: 812b920ukc3bdqr2sf707ca7un - Status: null
[INFO] 2022-02-03 11:07:18,452 [jsonrpcTaskScheduler-1] io.openvidu.server.rpc.RpcHandler - After connection closed for WebSocket session: fffpnvafkrrgm1v9ts7qvsv9hh - Status: null
[INFO] 2022-02-03 11:07:18,452 [jsonrpcTaskScheduler-1] io.openvidu.server.rpc.RpcHandler - After connection closed for WebSocket session: csq8urt43c5c5458cllppg65e5 - Status: null
[INFO] 2022-02-03 11:07:18,453 [jsonrpcTaskScheduler-1] io.openvidu.server.rpc.RpcHandler - After connection closed for WebSocket session: 4vng0ui1tqaq02504mip8ndaea - Status: null
[INFO] 2022-02-03 11:07:18,453 [jsonrpcTaskScheduler-1] io.openvidu.server.rpc.RpcHandler - After connection closed for WebSocket session: vpti9oq0mqfqdvbg2b6smc91hi - Status: null
[INFO] 2022-02-03 11:07:18,453 [jsonrpcTaskScheduler-1] io.openvidu.server.rpc.RpcHandler - After connection closed for WebSocket session: ogeplv1t2m1fqahrr2diaphpbq - Status: null
[INFO] 2022-02-03 11:07:18,452 [http-nio-0.0.0.0-5443-exec-129] io.openvidu.server.coturn.CoturnCredentialsService - COTURN user created: true
[ERROR] 2022-02-03 11:07:18,452 [http-nio-0.0.0.0-5443-exec-131] org.apache.coyote.http11.Http11NioProtocol - Failed to complete processing of a request
java.lang.OutOfMemoryError: Java heap space
at java.base/java.nio.HeapCharBuffer.(HeapCharBuffer.java:61)
at java.base/java.nio.CharBuffer.allocate(CharBuffer.java:348)
at org.apache.tomcat.websocket.WsFrameBase.(WsFrameBase.java:96)
at org.apache.tomcat.websocket.server.WsFrameServer.(WsFrameServer.java:45)
at org.apache.tomcat.websocket.server.WsHttpUpgradeHandler.init(WsHttpUpgradeHandler.java:128)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:915)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1590)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.base/java.lang.Thread.run(Thread.java:829)
[INFO] 2022-02-03 11:07:19,032 [SessionHandler-1l7cckoke0utlbol10pqsahclr-e141784-t0] io.openvidu.server.core.SessionManager - Participant con_WD20SGc4kX of session fd55e04510c35e11b963f1cd6f42bb96 is a final user connecting to this session for the first time
[INFO] 2022-02-03 11:07:19,032 [SessionHandler-1l7cckoke0utlbol10pqsahclr-e141784-t0] io.openvidu.server.rpc.RpcHandler - New Connection con_WD20SGc4kX in Session fd55e04510c35e11b963f1cd6f42bb96 with IP 189.174.17.16 and platform Android 26
[ERROR] 2022-02-03 11:07:19,032 [SessionHandler-1l7cckoke0utlbol10pqsahclr-e141784-t0] io.openvidu.server.kurento.core.KurentoSessionManager - PARTICIPANT con_WD20SGc4kX: Error joining/creating session fd55e04510c35e11b963f1cd6f42bb96
io.openvidu.client.OpenViduException: There is no available Media Node where to initialize session ‘fd55e04510c35e11b963f1cd6f42bb96’. Code: 204
at io.openvidu.server.kurento.core.KurentoSessionManager.selectMediaNode(KurentoSessionManager.java:1409)
at io.openvidu.server.kurento.core.KurentoSessionManager.joinRoom(KurentoSessionManager.java:133)
at io.openvidu.server.rpc.RpcHandler.joinRoom(RpcHandler.java:296)
at io.openvidu.server.rpc.RpcHandler.handleRequest(RpcHandler.java:119)
at org.kurento.jsonrpc.internal.JsonRpcHandlerManager.handleRequest(JsonRpcHandlerManager.java:142)
at org.kurento.jsonrpc.internal.server.ProtocolManager$3.run(ProtocolManager.java:218)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:829)
[ERROR] 2022-02-03 11:07:19,038 [http-nio-0.0.0.0-5443-exec-48] org.apache.catalina.core.ContainerBase.[Tomcat].[localhost].[/].[dispatcherServlet] - Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Handler dispatch failed; nested exception is java.lang.OutOfMemoryError: Java heap space] with root cause
java.lang.OutOfMemoryError: Java heap space
at java.base/java.io.BufferedReader.readLine(BufferedReader.java:358)
at java.base/java.io.BufferedReader.readLine(BufferedReader.java:392)
at io.openvidu.server.utils.CommandExecutor.commonExecCommand(CommandExecutor.java:82)
at io.openvidu.server.utils.CommandExecutor.execCommand(CommandExecutor.java:42)
at io.openvidu.server.coturn.BashCoturnCredentialsService.createUser(BashCoturnCredentialsService.java:83)
at io.openvidu.server.core.TokenGenerator.generateToken(TokenGenerator.java:52)
at io.openvidu.server.core.SessionManager.newToken(SessionManager.java:330)
at io.openvidu.server.rest.SessionRestController.newWebrtcConnection(SessionRestController.java:667)
at io.openvidu.server.rest.SessionRestController.initializeConnection(SessionRestController.java:243)
at jdk.internal.reflect.GeneratedMethodAccessor58.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:105)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:878)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:792)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:652)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:733)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:113)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
[INFO] 2022-02-03 11:07:19,038 [http-nio-0.0.0.0-5443-exec-76] io.openvidu.server.rpc.RpcHandler - After connection established for WebSocket session: t3j6e129h32gjl157907ds0fqc
