Hi, I have upgraded my cloudstack from 4.4 to 4.8. After upgrading, the agent on hosts cannot start. I receive the following message: 20:08:45,833 ERROR [cloud.agent.AgentShell] (main:null) (logid:) Unable to start agent: com.cloud.utils.exception.CloudRuntimeException: Unable to start the connection! at com.cloud.agent.Agent.start(Agent.java:230) at com.cloud.agent.AgentShell.launchAgent(AgentShell.java:399) at com.cloud.agent.AgentShell.launchAgentFromClassInfo(AgentShell.java:367) at com.cloud.agent.AgentShell.launchAgent(AgentShell.java:351) at com.cloud.agent.AgentShell.start(AgentShell.java:461) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.apache.commons.daemon.support.DaemonLoader.start(DaemonLoader.java:243) Caused by: com.cloud.utils.exception.NioConnectionException: Connection closed with -1 on reading size. at com.cloud.utils.nio.NioConnection.start(NioConnection.java:94) at com.cloud.agent.Agent.start(Agent.java:228) ... 9 more Caused by: java.io.IOException: Connection closed with -1 on reading size. at com.cloud.utils.nio.Link.doHandshake(Link.java:513) at com.cloud.utils.nio.NioClient.init(NioClient.java:80) at com.cloud.utils.nio.NioConnection.start(NioConnection.java:88) ... 10 more 2016-05-02 20:08:45,834 INFO [cloud.agent.Agent] (AgentShutdownThread:null) (logid:) Stopping the agent: Reason = sig.kill
I tried to troubleshoot, but nothing. Please, can anybody help me to solve my problem ? Additional information 1- The output of netstat command shows that management server does not listen on TCP port 8250, but on TCP6 port 8250 admin@mgnt:~$ sudo netstat -tanp | grep 8250 tcp6 0 0 :::8250 :::* LISTEN 20101/jsvc.exec 2- The telnet command on port 8250 return the message "Connection closed by foreign host."admin@mgnt:~$ telnet 192.168.1.10 8250 Trying 192.168.1.10... Connected to 192.168.1.10. Escape character is '^]'. Connection closed by foreign host. 3- Management server and hosts (2) are running Ubuntu 14.04 LTS as operating system, and all are up-to-date. Thank you in advance. Elie
