Github user ustcweizhou commented on the pull request:
https://github.com/apache/cloudstack/pull/1430#issuecomment-198239218
stop the management server, and restart cloudstack-agent during the
stopping.
1. without the commit 3683dff :
```
2016-03-17 21:25:26,359 ERROR [utils.nio.NioConnection] (main:null) Unable
to initialize the threads.
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)
at com.cloud.agent.Agent.start(Agent.java:228)
at com.cloud.agent.AgentShell.launchAgent(AgentShell.java:401)
at
com.cloud.agent.AgentShell.launchAgentFromClassInfo(AgentShell.java:369)
at com.cloud.agent.AgentShell.launchAgent(AgentShell.java:353)
at com.cloud.agent.AgentShell.start(AgentShell.java:463)
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)
2016-03-17 21:25:26,362 INFO [utils.exception.CSExceptionErrorCode]
(main:null) Could not find exception:
com.cloud.utils.exception.NioConnectionException in error code list for
exceptions
2016-03-17 21:25:26,362 ERROR [cloud.agent.AgentShell] (main:null) 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:401)
at
com.cloud.agent.AgentShell.launchAgentFromClassInfo(AgentShell.java:369)
at com.cloud.agent.AgentShell.launchAgent(AgentShell.java:353)
at com.cloud.agent.AgentShell.start(AgentShell.java:463)
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
2016-03-17 21:25:26,363 INFO [cloud.agent.Agent]
(AgentShutdownThread:null) Stopping the agent: Reason = sig.kill
2016-03-17 21:25:26,364 DEBUG [cloud.agent.Agent]
(AgentShutdownThread:null) Sending shutdown to management server
```
2. with the commit 3683dff ,
agent.log show the following log every 5 seconds, until agent connects to
management server:
```
2016-03-18 08:10:45,518 INFO [utils.nio.NioClient] (main:null) Connecting
to 172.16.15.10:8250
2016-03-18 08:10:45,529 ERROR [utils.nio.NioConnection] (main:null) Unable
to initialize the threads.
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)
at com.cloud.agent.Agent.start(Agent.java:236)
at com.cloud.agent.AgentShell.launchAgent(AgentShell.java:401)
at
com.cloud.agent.AgentShell.launchAgentFromClassInfo(AgentShell.java:369)
at com.cloud.agent.AgentShell.launchAgent(AgentShell.java:353)
at com.cloud.agent.AgentShell.start(AgentShell.java:463)
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)
2016-03-18 08:10:45,530 INFO [utils.exception.CSExceptionErrorCode]
(main:null) Could not find exception:
com.cloud.utils.exception.NioConnectionException in error code list for
exceptions
2016-03-18 08:10:45,530 INFO [cloud.agent.Agent] (main:null) Attempted to
connect to the server, but received an unexpected exception, trying again...
```
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