Elie, Are you using the same version for management server and cloudstack-agent, if not please fix that first upgrade your cloudstack-agent to 4.8 as well. Secondly make sure port 8250 on mgmt server host is accessible for the cloudstack-agent to connect to. Make sure Java runtime version same and version 1.7.x (preferable oracle jre 1.7.0_80) on both management server host and kvm host (kvm agent).
Finally, if both the above are non-issues for you apply the patch from: https://github.com/apache/cloudstack/pull/1493 and build both management server and cloudstack-agent (kvm agent) with this patch included in your 4.8.x source code. If you're Regards. On Wed, May 4, 2016 at 5:38 AM, ilya <ilya.mailing.li...@gmail.com> wrote: > Ellie, > > We recently fixed a bug that prevents monopolizing the 8250 socket when > someone telnets onto 8250 without proper SSL Handshake. > > Not certain if 4.8 has it merged and we released a 4.8.x patch upgrade. > > Perhaps we need to release 4.8 with bugfix, please kindly post a message > on dev list. > > Would you be able to rebuild cloudstack from source? > > CCing Rohit as he was the developer for this fix. > > On 5/3/16 4:30 PM, Elie MABO wrote: > > Hi Simon, > > > > I added the settings to JAVA_OPTS as you suggested, and now, ACS > Manegement is listened on TCP port 8250admin@mngt:~$ sudo netstat -tanp | > grep 8250 > > tcp 0 0 0.0.0.0:8250 0.0.0.0:* > LISTEN 3143/jsvc.exec > > But, I always have the message "Connection closed by foreign host." when > I telnet the Management server on port 8250. So, agent on KVM hosts cannot > start. > > Thanks again for you help > > Elie. > > > > > > Le Lundi 2 mai 2016 22h07, Simon Weller <swel...@ena.com> a écrit : > > > > > > Ellie, > > > > Can you try forcing ACS Management to only bind to IPV4? > > Normally this is done in the JAVA_OPTS by setting > -Djava.net.preferIPv4Stack=true -Djava.net.preferIPv4Addresses=true > > > > I think on the ACS Ubuntu release, JAVA_OPTS is set in your init > scripts, but I'm not absolutely sure about that. > > > > Maybe someone who runs Ubuntu can chime in on this. > > > > - Si > > > > > > > > ________________________________________ > > From: Elie MABO <mta...@yahoo.fr.INVALID> > > Sent: Monday, May 2, 2016 8:38 PM > > To: Users; Dev > > Subject: I cannot start agent - Cloudstack 4.8 - Connection closed with > -1 on reading size > > > > 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 > > > > > > >
