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Re: [ecf-dev] Difficulty connecting to services using r_osgi and web sockets
Scott / devs,
One of the great part of a mailing list for me is that 50% of the time I solve my own problem when typing up the answer.  About 25% of the time, I figure it out within 30 minutes of sending the mail and the rest of the time it is solved with replies.

This is one of those times I figured it out within 30 minutes ;-)

I KNEW the ports were open in all 3 firewalls (1 client, 2 server) and I still couldn't connect so I sent the mail.  Then just to triple check, I started tomcat on the server and connected from my client.  My face turned 3 shades of red when I got a timeout because one of the server firewalls was blocking port 80!

I stopped tomcat, changed the firewall config and started karaf.  Lo and behold my RCP client connected to the karaf server and retrieved data!!!

It might still make sense to allow changing the timeout on general principles but I will leave that up to the primary developers.

Tim

Date: Fri, 13 Mar 2015 14:40:51 -0700
From: slewis@xxxxxxxxxxxxx
To: ecf-dev@xxxxxxxxxxx
Subject: Re: [ecf-dev] Difficulty connecting to services using r_osgi and web sockets

Hi Tim,

Jan and/or Markus may respond with better information about the rosgi provider, but it looks like the TIMEOUT from ChannelEndpointImpl is set to a constant here:

    /**
     * Timeout.
     */
    private static final int TIMEOUT = 120000;

I'm not sure why you are experiencing ~20sec, as this looks like it should timeout after 120s. 

I think this should probably be a system property/configurable, but I'll let Jan or Markus comment as there may be something else going on.  If that's the right thing to do then a System property to configure/change default can be easily added.

But one question:   even 20s seems too long to have to wait for response...at least under most conditions.  Is it possible something else is going on on the server that's preventing it from responding?

Scott


On 3/13/2015 2:20 PM, Timothy Vogel wrote:
I have a set of OSGi services running in karaf that are using r_osgi and web sockets to make them available via http on port 80.  I am able to connect to these services from a client installed on the same machine but not from computers over the internet.

I think this is due to timeout while waiting to make the connection from client to server over the Internet.  I put the exceptions received on the client below.

How can I increase the timeout while waiting for a connection?

Thanks,
Timothy Vogel


The client throws the following exception after approximately 20 seconds.
Exception in thread "Thread-11" java.lang.NullPointerException
at ch.ethz.iks.r_osgi.transport.http.HttpChannelFactory$HttpChannel.closeSocket(HttpChannelFactory.java:194)
at ch.ethz.iks.r_osgi.transport.http.HttpChannelFactory$HttpChannel$1.onClose(HttpChannelFactory.java:141)
at org.java_websocket.client.WebSocketClient.onWebsocketClose(WebSocketClient.java:389)
at org.java_websocket.WebSocketImpl.closeConnection(WebSocketImpl.java:412)
at org.java_websocket.WebSocketImpl.closeConnection(WebSocketImpl.java:420)
at org.java_websocket.WebSocketImpl.eot(WebSocketImpl.java:434)
at org.java_websocket.client.WebSocketClient.interruptableRun(WebSocketClient.java:281)
at org.java_websocket.client.WebSocketClient.run(WebSocketClient.java:204)
at java.lang.Thread.run(Thread.java:745)

When the client exits it throws the additional 2 exceptions below:
!STACK 0
ch.ethz.iks.r_osgi.RemoteOSGiException: Interrupted while waiting for callback
at ch.ethz.iks.r_osgi.impl.ChannelEndpointImpl.sendAndWait(ChannelEndpointImpl.java:1361)
at ch.ethz.iks.r_osgi.impl.ChannelEndpointImpl.sendLease(ChannelEndpointImpl.java:749)
at ch.ethz.iks.r_osgi.impl.RemoteOSGiServiceImpl.connect(RemoteOSGiServiceImpl.java:725)
at org.eclipse.ecf.internal.provider.r_osgi.R_OSGiRemoteServiceContainer.doConnect(R_OSGiRemoteServiceContainer.java:551)
at org.eclipse.ecf.internal.provider.r_osgi.R_OSGiRemoteServiceContainer.connect(R_OSGiRemoteServiceContainer.java:532)
at org.eclipse.ecf.internal.provider.r_osgi.R_OSGiRemoteServiceContainer.getRemoteServiceReferences(R_OSGiRemoteServiceContainer.java:251)
at org.eclipse.ecf.internal.provider.r_osgi.R_OSGiRemoteServiceContainer.getRemoteServiceReferences(R_OSGiRemoteServiceContainer.java:217)
at org.eclipse.ecf.osgi.services.remoteserviceadmin.RemoteServiceAdmin$14.run(RemoteServiceAdmin.java:2288)
at org.eclipse.ecf.osgi.services.remoteserviceadmin.RemoteServiceAdmin$14.run(RemoteServiceAdmin.java:1)
at java.security.AccessController.doPrivileged(Native Method)
at org.eclipse.ecf.osgi.services.remoteserviceadmin.RemoteServiceAdmin.importService(RemoteServiceAdmin.java:2284)
at org.eclipse.ecf.osgi.services.remoteserviceadmin.RemoteServiceAdmin.importService(RemoteServiceAdmin.java:428)
at org.eclipse.ecf.osgi.services.remoteserviceadmin.AbstractTopologyManager.handleECFEndpointAdded(AbstractTopologyManager.java:293)
at org.eclipse.ecf.internal.osgi.services.distribution.BasicTopologyManagerImpl.handleEndpointAdded(BasicTopologyManagerImpl.java:104)
at org.eclipse.ecf.internal.osgi.services.distribution.BasicTopologyManagerImpl.endpointChanged(BasicTopologyManagerImpl.java:181)
at org.eclipse.ecf.internal.osgi.services.distribution.Activator$ProxyEndpointEventListener.deliverSafe(Activator.java:206)
at org.eclipse.ecf.internal.osgi.services.distribution.Activator$ProxyEndpointEventListener.endpointChanged(Activator.java:183)
at org.eclipse.ecf.osgi.services.remoteserviceadmin.EndpointDescriptionLocator$1.dispatchEvent(EndpointDescriptionLocator.java:198)
at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:340)
Caused by: java.lang.InterruptedException
at java.lang.Object.wait(Native Method)
at ch.ethz.iks.r_osgi.impl.ChannelEndpointImpl.sendAndWait(ChannelEndpointImpl.java:1357)
... 19 more
119106 ERROR org.eclipse.ecf.osgi.services.remoteserviceadmin - org.eclipse.core.runtime.Status[plugin=org.eclipse.ecf.osgi.services.remoteserviceadmin;code=4;message=org.eclipse.ecf.osgi.services.remoteserviceadmin.RemoteServiceAdmin:importService:selectRemoteServiceReference returned null for rsRefs=[],targetID=r-osgi.ws://easa.vogelware.com,idFilter=[Lorg.eclipse.ecf.core.identity.ID;@48b68d98,interfaces=[com.easa.motordb.services.IDcMotorEntity],rsFilter=null,rsContainerID=r-osgi.ws://TimLaptop;severity4;exception=ch.ethz.iks.r_osgi.RemoteOSGiException: Interrupted while waiting for callback;children=[]]
ch.ethz.iks.r_osgi.RemoteOSGiException: Interrupted while waiting for callback
at ch.ethz.iks.r_osgi.impl.ChannelEndpointImpl.sendAndWait(ChannelEndpointImpl.java:1361) ~[na:na]
at ch.ethz.iks.r_osgi.impl.ChannelEndpointImpl.sendLease(ChannelEndpointImpl.java:749) ~[na:na]
at ch.ethz.iks.r_osgi.impl.RemoteOSGiServiceImpl.connect(RemoteOSGiServiceImpl.java:725) ~[na:na]
at org.eclipse.ecf.internal.provider.r_osgi.R_OSGiRemoteServiceContainer.doConnect(R_OSGiRemoteServiceContainer.java:551) ~[na:na]
at org.eclipse.ecf.internal.provider.r_osgi.R_OSGiRemoteServiceContainer.connect(R_OSGiRemoteServiceContainer.java:532) ~[na:na]
at org.eclipse.ecf.internal.provider.r_osgi.R_OSGiRemoteServiceContainer.getRemoteServiceReferences(R_OSGiRemoteServiceContainer.java:251) ~[na:na]
at org.eclipse.ecf.internal.provider.r_osgi.R_OSGiRemoteServiceContainer.getRemoteServiceReferences(R_OSGiRemoteServiceContainer.java:217) ~[na:na]
at org.eclipse.ecf.osgi.services.remoteserviceadmin.RemoteServiceAdmin$14.run(RemoteServiceAdmin.java:2288) ~[na:na]
at org.eclipse.ecf.osgi.services.remoteserviceadmin.RemoteServiceAdmin$14.run(RemoteServiceAdmin.java:1) ~[na:na]
at java.security.AccessController.doPrivileged(Native Method) ~[na:1.7.0_65]
at org.eclipse.ecf.osgi.services.remoteserviceadmin.RemoteServiceAdmin.importService(RemoteServiceAdmin.java:2284) ~[na:na]
at org.eclipse.ecf.osgi.services.remoteserviceadmin.RemoteServiceAdmin.importService(RemoteServiceAdmin.java:428) ~[na:na]
at org.eclipse.ecf.osgi.services.remoteserviceadmin.AbstractTopologyManager.handleECFEndpointAdded(AbstractTopologyManager.java:293) ~[na:na]
at org.eclipse.ecf.internal.osgi.services.distribution.BasicTopologyManagerImpl.handleEndpointAdded(BasicTopologyManagerImpl.java:104) ~[na:na]
at org.eclipse.ecf.internal.osgi.services.distribution.BasicTopologyManagerImpl.endpointChanged(BasicTopologyManagerImpl.java:181) ~[na:na]
at org.eclipse.ecf.internal.osgi.services.distribution.Activator$ProxyEndpointEventListener.deliverSafe(Activator.java:206) ~[na:na]
at org.eclipse.ecf.internal.osgi.services.distribution.Activator$ProxyEndpointEventListener.endpointChanged(Activator.java:183) ~[na:na]
at org.eclipse.ecf.osgi.services.remoteserviceadmin.EndpointDescriptionLocator$1.dispatchEvent(EndpointDescriptionLocator.java:198) ~[na:na]
at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230) ~[na:na]
at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:340) ~[na:na]
Caused by: java.lang.InterruptedException: null
at java.lang.Object.wait(Native Method) ~[na:1.7.0_65]
at ch.ethz.iks.r_osgi.impl.ChannelEndpointImpl.sendAndWait(ChannelEndpointImpl.java:1357) ~[na:na]
... 19 common frames omitted



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