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From "Hubert, Eric" <Eric.Hub...@foxmobile.com>
Subject RE: [jira] Updated: (SYNAPSE-536) Error while stoping the Synapse server
Date Sun, 26 Apr 2009 18:04:53 GMT
Hi Ruwan,

 

There are a few issues with the shutdown-handling left, especially in error situations. Runtime-Exceptions
are passing through the layers and are not always appropriately handled. Each time I’m encountering
an issue, I’ll put it on a list. Sometimes I would like to fix those issues immediately,
but as I’m currently working on a change which is also large enough without all those corrections
on the way, I try to keep those issues for later to ease the review work.

 

I also started to move some classes from org.apache.synape to a subpackage org.apache.synapse.server,
but then decided to go back as this makes it harder to follow up parallel changes to the same
classes and also makes reviewing harder then it has to be. So I stepped back. Anyway I think
moving some classes from the toplevel package to a server package would make sense as a next
step.

 

I’ll post the patch today, as all my tests seem to be successful. I will now spend some
hours on documenting and then look for the open issue in JIRA and attach the patch. So if
you could wait with some further changes to ServerManager, Axis2SynapseController and those
central classes this would help me.

 

Thanks,

   Eric

 

________________________________

From: Ruwan Linton [mailto:ruwan.linton@gmail.com] 
Sent: Sunday, April 26, 2009 7:28 PM
To: dev@synapse.apache.org
Subject: Re: [jira] Updated: (SYNAPSE-536) Error while stoping the Synapse server

 

Eric,

I applied the patch and tested... Even though this particular exception is not there, it doesn't
seem to go on the clean shutdown path instead it just halts and seems to be the shutdown hook
is not executing.... :-( Also this doesn't seem to be relevant to this fix, but there is something
wrong on the trunk about the shutdown process.

I will further look into this in the mean time if you happen to see the same issue on your
environment please do let me know.

Thanks,
Ruwan

On Sun, Apr 26, 2009 at 4:41 AM, Hubert, Eric <Eric.Hubert@foxmobile.com> wrote:

Hi Ruwan,

I submitted a patch which should fix this issue you reported. Fortunately I was not able to
reproduce it locally. Could you please first apply this patch locally and test if it fixes
the issue for you!

By the way, which log4j configuration are we using if running the server from synapse.sh?
There is one directly in the lib directory which does not seem to be used and one in the synapse-core.jar
and likely others...

There are still a couple of other issues in the startup/shutdown logic you will notice once
you call stop and start from ServerManager. I'm working on those issues as well.

Thanks,
  Eric



>
>      [ https://issues.apache.org/jira/browse/SYNAPSE-
> 536?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
>
> Eric Hubert updated SYNAPSE-536:
> --------------------------------
>
>     Attachment: Shutdown.patch
>
> > Error while stoping the Synapse server
> > --------------------------------------
> >
> >                 Key: SYNAPSE-536
> >                 URL: https://issues.apache.org/jira/browse/SYNAPSE-536
> >             Project: Synapse
> >          Issue Type: Bug
> >          Components: Core
> >    Affects Versions: NIGHTLY
> >            Reporter: Eric Hubert
> >             Fix For: 1.3
> >
> >         Attachments: Shutdown.patch
> >
> >
> > Originally reported by Ruwan and confirmed by Hiranya:
> > On the latest build I am seeing an error while trying to stop Synapse,
> by killing the process (CTRL+C) on Unix.
> > Is this local to me? I do have some local changes but they have nothing
> to do with this I guess. :-(
> > 2009-04-25 09:49:40,580 [-] [Thread-9]  INFO SynapseServer Shutting down
> Apache Synapse...
> > 2009-04-25 09:49:40,582 [-] [HttpCoreNIOListener]  INFO
> HttpCoreNIOListener HTTPS Listener Shutdown
> > 2009-04-25 09:49:40,583 [-] [Thread-9]  INFO VFSTransportListener VFS
> Listener Shutdown
> > 2009-04-25 09:49:40,583 [-] [HttpCoreNIOListener]  INFO
> HttpCoreNIOListener HTTP Listener Shutdown
> > 2009-04-25 09:49:40,584 [-] [Thread-9]  INFO MailTransportListener
> MAILTO Listener Shutdown
> > 2009-04-25 09:49:40,585 [-] [HttpCoreNIOSender]  INFO HttpCoreNIOSender
> HTTPS Sender Shutdown
> > 2009-04-25 09:49:40,586 [-] [HttpCoreNIOSender]  INFO HttpCoreNIOSender
> HTTP Sender Shutdown
> > 2009-04-25 09:49:40,586 [-] [Thread-9]  INFO VFSTransportSender VFS
> Sender Shutdown
> > 2009-04-25 09:49:40,587 [-] [Thread-9]  INFO JMSSender JMS Sender
> Shutdown
> > 2009-04-25 09:49:40,588 [-] [Thread-9]  INFO RMIRegistryController
> Removing the RMI registry bound to port : 1099
> > 2009-04-25 09:49:40,604 [-] [Thread-9]  INFO JmxAdapter
> JMXConnectorServer stopping on
> service:jmx:rmi:///jndi/rmi://ruwan:1099/synapse
> > 2009-04-25 09:49:40,761 [-] [Thread-9] ERROR JmxAdapter Error while
> stopping remote JMX connector
> > java.io.IOException: Cannot bind to URL:
> > javax.naming.CommunicationException [Root exception is
> > java.rmi.NoSuchObjectException: no such object in table]
> >         at
> javax.management.remote.rmi.RMIConnectorServer.newIOException(RMIConnector
> Server.java:814)
> >         at
> javax.management.remote.rmi.RMIConnectorServer.stop(RMIConnectorServer.jav
> a:572)
> >         at org.apache.synapse.JmxAdapter.stop(JmxAdapter.java:140)
> >         at
> org.apache.synapse.Axis2SynapseController.stopJmxAdapter(Axis2SynapseContr
> oller.java:583)
> >         at
> org.apache.synapse.Axis2SynapseController.destroy(Axis2SynapseController.j
> ava:143)
> >         at
> org.apache.synapse.ServerManager.doDestroy(ServerManager.java:252)
> >         at
> org.apache.synapse.ServerManager.destroy(ServerManager.java:117)
> >         at org.apache.synapse.SynapseServer$1.run(SynapseServer.java:88)
> > Caused by: javax.naming.CommunicationException [Root exception is
> > java.rmi.NoSuchObjectException: no such object in table]
> >         at
> com.sun.jndi.rmi.registry.RegistryContext.unbind(RegistryContext.java:156)
> >         at
> com.sun.jndi.toolkit.url.GenericURLContext.unbind(GenericURLContext.java:2
> 54)
> >         at javax.naming.InitialContext.unbind(InitialContext.java:375)
> >         at
> javax.management.remote.rmi.RMIConnectorServer.stop(RMIConnectorServer.jav
> a:565)
> >         ... 6 more
> > Caused by: java.rmi.NoSuchObjectException: no such object in table
> >         at
> sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemot
> eCall.java:247)
> >         at
> sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:223)
> >         at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:343)
> >         at sun.rmi.registry.RegistryImpl_Stub.unbind(Unknown Source)
> >         at
> com.sun.jndi.rmi.registry.RegistryContext.unbind(RegistryContext.java:152)
> >         ... 9 more
> > 2009-04-25 09:49:40,772 [-] [Thread-9]  INFO SynapseServer Apache
> Synapse shutdown complete
> > 2009-04-25 09:49:40,773 [-] [Thread-9]  INFO SynapseServer Halting JVM
> > Unfortunately I'm not able to reproduce this issue in my environment
> although from looking at the code the obvious reason seems to be the RMI
> registry is shutdown before the JmxAdapter is stopped.
> > Attached you'll find a patch which moves the RMI registry stop to a
> later position after stopping the JmxAdapter. This should fix the issue.
>
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-- 
Ruwan Linton
Senior Software Engineer & Product Manager; WSO2 ESB; http://wso2.org/esb
WSO2 Inc.; http://wso2.org
email: ruwan@wso2.com; cell: +94 77 341 3097
blog: http://ruwansblog.blogspot.com 

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