weijunbao / openjsip Goto Github PK

Automatically exported from code.google.com/p/openjsip

License: Apache License 2.0

Shell 10.78% Batchfile 0.66% HTML 0.36% Java 88.20%

openjsip's Introduction

Open Java SIP project (OpenJSIP)
----------------------------------
http://code.google.com/p/openjsip/

-----------------------------------
R E A D M E
-----------------------------------

1. About
2. Current development status
3. License
4. How to install and use
5. Directory layout
6. Quick start
7. Development hints
8. Troubleshooting
9. Contacts

1. About
----------

OpenJSIP is a GNU GPL licensed bundle of free distributed SIP services ( Proxy, Registrar and so on) run by Java VM.
Distributed means that these components can be deployed on different hosts and communicating
with each other with the help of Remote Method Invocation (RMI, see java.sun.com for details).
It was started under inspiration of JAIN-SIP project ( full implementation of RFC 3261 for Java ).

If you don't understand what is it all about, please look through the following intro.

This project is about SIP protocol, which allows us to contact each other with the help of VOIP.
To make the things work there are services that do a lot of usefull things. Some of them
keep tracking of subscriber's current location (IP addresses), the other ones do speech codec
conversions and so on.

Here are the basic entities with description copied from RFC3261:

User Agent Client (UAC): A user agent client is a logical entity
that creates a new request, and then uses the client
transaction state machinery to send it. The role of UAC lasts
only for the duration of that transaction. In other words, if
a piece of software initiates a request, it acts as a UAC for
the duration of that transaction. If it receives a request
later, it assumes the role of a user agent server for the
processing of that transaction.

User Agent Server (UAS): A user agent server is a logical entity
that generates a response to a SIP request. The response
accepts, rejects, or redirects the request. This role lasts
only for the duration of that transaction. In other words, if
a piece of software responds to a request, it acts as a UAS for
the duration of that transaction. If it generates a request
later, it assumes the role of a user agent client for the
processing of that transaction.

Proxy, Proxy Server: An intermediary entity that acts as both a
server and a client for the purpose of making requests on
behalf of other clients. A proxy server primarily plays the
role of routing, which means its job is to ensure that a
request is sent to another entity "closer" to the targeted
user. Proxies are also useful for enforcing policy (for
example, making sure a user is allowed to make a call). A
proxy interprets, and, if necessary, rewrites specific parts of
a request message before forwarding it.

Registrar: A registrar is a server that accepts REGISTER requests
and places the information it receives in those requests into
the location service for the domain it handles.

Location Service: A location service is used by a SIP redirect or
proxy server to obtain information about a callee's possible
location(s). It contains a list of bindings of address-of-
record keys to zero or more contact addresses. The bindings
can be created and removed in many ways; this specification
defines a REGISTER method that updates the bindings.

Back-to-Back User Agent: A back-to-back user agent (B2BUA) is a
logical entity that receives a request and processes it as a
user agent server (UAS). In order to determine how the request
should be answered, it acts as a user agent client (UAC) and
generates requests. Unlike a proxy server, it maintains dialog
state and must participate in all requests sent on the dialogs
it has established. Since it is a concatenation of a UAC and
UAS, no explicit definitions are needed for its behavior.

In two words, when you call someone - you are UAC, and your friend is UAS.
And what actually do Proxy ? For example, you don't know the current IP address of
your friend. Proxy finds for you his IP address and routes your SIP messages to him and
vice versa. To find the current IP of your friend proxy contacts Location Service.
Location Service is itself filled with contact data by Registrar. When your friend goes online,
he sends its credentials to Registrar. Registrar will then upload data to Location Service,
so Proxy will be able then to find him.

So, at the current stage of development the following services where implemented in OpenJSIP:

* SIP Proxy
* SIP Registrar
* SIP Location Service

As it was already said these services are distributed. Distributed architecture allows building the
redundant and load-balanced systems.

Q. What is the difference between for example Asterisk and OpenJSIP ?
A. Asterisk is a monolith B2BUA with built in proxy, registrar and location service functionalities.
Asterisk can convert speech codecs, can also act like Voice Mailbox and so on..
OpenJSIP for now is just a simple SIP Proxy which routes SIP messages between subscribers,
and have no relationship to voice data. Voice data flows between two subscribers directly.

2. Current development status
------------------------------

Latest release v0.0.4
Latest release description: Draft, but we are working... )))

The following services implemented:

* SIP Proxy
- Statefull mode
- Stateless mode
- Optional processing of REGISTER requests

* SIP Registrar
- Standalone mode ( listen's for REGISTER requests itself )
- ViaProxy mode ( REGISTER requests are delivered by proxy via RMI )

* SIP Location Service
- No database integration yet. ( Keeps data in memory ).

3. License
-----------

OpenJSIP is a GNU GPL licensed project. GPL is copyrighted by the Free Software Foundation
and the OpenJSIP software is mainly copyrighted by Yevgen Krapiva (for now).
The GPL applies to this copy of OpenJSIP (Open Java SIP) software.
You should have received a copy of the GNU General Public License along with this project.
If not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

This project also uses 3rd party tools that are licensed differently.
To use and redistribute this copy of OpenJSIP distributive, you must agree to the license terms of these tools:

* Java SNMP Package by Jonathan Sevy ( http://gicl.cs.drexel.edu/people/sevy/snmp/ ).
License: free.
* Apache Log4J library ( http://logging.apache.org/log4j/1.2/ ).
License: Apache License 2.0. See license.apache file.

4. How to install and use
--------------------------

Please make attention that no graphical user interface is shipped with this project (for now).
Are you scared ? No ? Then let's go !

You should have installed Java Runtime Environment version 1.6.0 or later.
Make sure that path to java VM executable is in the PATH variable.

Note:
You also need to run rmiregistry tool before using OpenJSIP components.
This tool is located at JRE_HOME/bin directory. RMI cannot be used without it.

* UNIX
1. Extract the archive to some location.
2. Run bin/openjsip script and follow instructions.

Example:
> rmiregistry &
> cd /tmp/openjsip
> bin/openjsip start location-service
> bin/openjsip start registrar
> bin/openjsip start proxy

* Windows
1. Extract the archive to some location
2. Edit with text editor %openjsip_installation_dir%/bin/openjsip.bat file
3. At the top of the file set the correct value of base_dir variable pointing to the %openjsip_installation_dir%
4. Run bin\openjsip.bat script and follow instructions.

Example:
C:\openjsip> start rmiregistry
C:\openjsip> start bin\openjsip.bat start location-service
C:\openjsip> start bin\openjsip.bat start registrar
C:\openjsip> start bin\openjsip.bat start proxy

Start every component in the order it is shown. Note that every component can be restarted with no influence to the others.
But if you restart location service, it will loose all its data. Because it works like this at the current stage of development.

With version 0.0.3 we ship additional EXPERIMENTAL tool called command-line client. This client can be used to query services
for various data (like counters). Initially it was in mind to use it for gathering counters from services and draw graphs.
But now we plan to use SNMP for such task. So beginning with version 0.0.3 there is also EXPERIMENTAL SNMP Agent.
SNMP Agents are configured in configuration files of each service separately.

Now I will show you how to use command-line client and SNMP.

* UNIX

Start some service, Location Service for example:
> rmiregistry &
> cd /tmp/openjsip
> bin/openjsip start location-service

During startup of service you will see the following message:
...
... Location Service registered as "LocationService" within RMI registry at localhost:1099
...

Use this data to construct RMI URI and issue a command.

> bin/cmdclient rmi://localhost:1099/LocationService help

You will get help from Location Service server.

> bin/cmdclient rmi://localhost:1099/LocationService show subscribers
sip:[email protected]
sip:[email protected]
sip:[email protected]
sip:[email protected]
sip:[email protected]
sip:[email protected]
Database contains 6 subscribers.

During startup of service you can also see the following message:
...
... SNMP agent started at port 1161 with community public
...

> snmpwalk -c public -v1 -On localhost:1161 1.3.6.1
.1.3.6.1.4.1.1937.1.1.1 = Gauge32: 6
.1.3.6.1.4.1.1937.1.1.2 = Gauge32: 0

No MIBs are ready yet. For description of OIDs please refer to source code.

* Windows

Windows users, please follow the steps described for unix users.
And note that RMI URI for unix ( rmi://localhost:1099/LocationService )
is the same for windows ( do not change backslashes ).

Any questions ? Please refer to Contacts section.

5. Directory layout
--------------------

bin/ - Contains binaries used for starting, stopping and management of services.
openjsip - Unix shell executable script.
openjsip.bat - Windows executable script.
cmdclient - Unix shell executable script for operation and management of OpenJSIP services.
cmdclient.bat - Windows executable script for operation and management of OpenJSIP services.

conf/
location-service.properties - Configuration file for SIP Location Service service.
registrar.properties - Configuration file for SIP Registrar service.
proxy.properties - Configuration file for SIP Proxy service.
users.properties - Subscribers database

docs/ - Contains different documentaion on OpenJSIP source code and other things.
You can also find RFC3261 here.

extra/ - Contains different tools, such as tools for collecting statistics. See additional readme there.

lib/ - Contains different libraries required by OpenJSIP and OpenJSIP .jar itself.

logs/ - Contains logs.

policy/ - Contains RMI policy files.

src/ - Contains OpenJSIP source files.

6. Quick start
---------------

OpenJSIP default config files assume that Location Service, Registrar and Proxy will run
on the local machine all together. You do not need to modify anything.

Just go to OpenJSIP installation directory and run all these services.
Don't forget about rmiregistry tool. See examples at section 4 of this readme.
If every component has successfully started, you may now configure your phones to set up
correct proxy ip address and port and try to call each other.
Look at conf/users.properties file to see, add or configur subscribers profiles.

7. Development hints
---------------------

This project is shipped with the Ant build file (build.xml). To use it you should have
installed Apache Ant (http://ant.apache.org/). Apache Ant is a Java-based build tool.
To compile a project go to the directory where OpenJSIP is installed and run ant
from a command line.

Example:
> cd /tmp/openjsip
> ant

Ant by default will compile all sources located at src directory and will make openjsip.jar
and openjsip-remote.jar files under lib directory.

Note:
openjsip-remote.jar file contains only interfaces and classes for developing RMI clients and
RMI servers. And openjsip.jar file contains services implementations. So, for example, if you need
to create some client to OpenJSIP service, you create a separate project, import openjsip-remote.jar
library and start developing.
Ant build.xml file contains tasks that create these two files.

To view all available tasks, type ant -projecthelp, for example:

> cd /tmp/openjsip
> ant -projecthelp
Buildfile: build.xml

Main targets:

build.all Build all including Java API docs.
build.javadoc Build API documentaion.
build.project.library Make project library
build.remote.library Make remote interfaces library
clean.all Cleanup All
clean.output.dir Cleanup output dir (where temporary classes are stored)
compile.project.library Compile project library
compile.remote.library Compile remote interfaces library
Default target: build.all

If you wish to participate on a project, please guide the following rules:

* Do not hustle the code
* Keep things compact and clear
* Do not be lazy of commenting out the code. Quotes from official documents like RFC
are preferred.
* Do not generate a lot of functions. If some block of code is used only in one place then
don't form it as function. Less the functions the better it would be to read the code.

Hints on viewing log files:

Log viewer tool is not created yet. Because of all requests are processed simultaneously,
it is quite hard to filter messages of specific call.
For this reason, we place Call-ID value in each log message. To filter log files by specific Call-ID
use 'grep' (Unix users) or 'grep for Windows' ( http://gnuwin32.sourceforge.net/packages/grep.htm ).
To find Call-ID you want, I would suggest you to capture network traffic with sniffer and view it in
Wireshark. Wireshark can also draw charts of SIP calls.

8. Troubleshooting
-------------------

1. If you encounter a problem when some service crashes because with the following error:

Exception in thread "UDPMessageProcessorThread"
java.lang.OutOfMemoryError: unable to create new native thread
at java.lang.Thread.start0(Native Method)
at java.lang.Thread.start(Thread.java:597)
at gov.nist.javax.sip.stack.UDPMessageChannel.<init>(UDPMessageChannel.java:146)
at gov.nist.javax.sip.stack.UDPMessageProcessor.run(UDPMessageProcessor.java:182)
at java.lang.Thread.run(Thread.java:619)

this is usually means that the number of threads per process reached the limit.
Application tried to create a new thread but OS prohibited the attempt.

To fix this, you should play with the property gov.nist.javax.sip.THREAD_POOL_SIZE.
Set it to 50, 100, or 200. See description in conf/*.properties files.

P.S. In FreeBSD the max allowed number of threads per process can be viewed as:
>sysctl kern.threads.max_threads_per_proc
kern.threads.max_threads_per_proc: 1500

If nothing of above suits your case, you can report an issue.
To report an issue please visit http://code.google.com/p/openjsip/issues/list

9. Contacts
------------

Please send your comments, bugs, suggestions through Issues mechanism at project webpage
( http://code.google.com/p/openjsip/issues/list ) or send them directly to [email protected].

openjsip's People

Contributors

openjsip's Issues

static route type of SIP URI?

Is it possible without additional coding, to add a user to the user.properties 
that represents a non-expirable static type of wildcard SIP URI?

For instance, any sip invite that comes into proxy and matched a user portion 
wildcard, such as "1234*" or "555XXXX" can get routed to a static destination 
address:port.

This could add static routing to the proxy in addition to users who can send 
register requests.

Original issue reported on code.google.com by [email protected] on 4 Nov 2011 at 6:26

Cannot start location service under Ubuntu 13.04

What steps will reproduce the problem?
From readme.txt:
1. Extract the archive to some location.
2. rmiregistry &
3. cd /tmp/openjsip
4. bin/openjsip start location-service

What is the expected output? What do you see instead?
Location service does not start with the following error:
wheleph1304@wheleph1304-Lenovo-G570:/tmp/openjsip$ bin/openjsip start 
location-service
bin/openjsip/../../: Not a directory
ls: cannot access /lib/jain-sip-api*.jar: No such file or directory
ls: cannot access /lib/openjsip-remote*.jar: No such file or directory
Starting Location Service...
bin/openjsip: 119: bin/openjsip: cannot create /bin/location-service.pid: 
Permission denied
wheleph1304@wheleph1304-Lenovo-G570:/tmp/openjsip$ Error: Could not find or 
load main class openjsip.locationservice.LocationService

What version of the product are you using?
openjsip-v0.0.4.tar.gz

On what operating system?
Environment details:
wheleph1304@wheleph1304-Lenovo-G570:/tmp/openjsip$ uname -a
Linux wheleph1304-Lenovo-G570 3.8.0-29-generic #42-Ubuntu SMP Tue Aug 13 
23:12:18 UTC 2013 i686 i686 i686 GNU/Linux
wheleph1304@wheleph1304-Lenovo-G570:/tmp/openjsip$ java -version
java version "1.7.0_25"
OpenJDK Runtime Environment (IcedTea 2.3.10) (7u25-2.3.10-1ubuntu0.13.04.2)
OpenJDK Server VM (build 23.7-b01, mixed mode)
wheleph1304@wheleph1304-Lenovo-G570:/tmp/openjsip$ realpath -v
realpath version 1.17ubuntu1
wheleph1304@wheleph1304-Lenovo-G570:/tmp/openjsip$ ls -l /bin/sh
lrwxrwxrwx 1 root root 4 Jun  8 23:08 /bin/sh -> dash

When I change shebang of the script to #!/bin/bash I get the same error

Original issue reported on code.google.com by wheleph on 28 Aug 2013 at 8:02

standalone mode configuration

What steps will reproduce the problem?
1.configure the registrar.properties to be in "standalone" mode;
2.set all registrar interfaces as "registrar.interface.1.port = 5070";(if you 
get 12, for example, interfaces you have to configure 12 times on this option)
3.uncomment registrarplugin property in proxy.properties.

    # If Registrar service works in standalone mode, disable this plugin.
    proxy.method.plugin.1.classname = openjsip.proxy.plugins.RegisterPlugin
    # Separate configuration file for plugin
    proxy.method.plugin.1.properties = conf/registerplugin.properties
    #proxy.method.plugin.1.enabled = false
    proxy.method.plugin.1.enabled = true

4.start services;

What is the expected output? What do you see instead?
clients couldn't register on the service while haven't configured the domain 
suffixed with the port number 5070. but it should have been OK! 
I found that THERE SHOULD BE A registerplugin.properties in the conf\ 
directory. And I added these scripts in it:
    # Registration service connection settings
    #proxy.method.plugin.openjsip.proxy.plugins.RegisterPlugin.registrar.rmi.host = localhost
    proxy.method.plugin.openjsip.proxy.plugins.RegisterPlugin.registrar.rmi.host = (your registrar service address)
    proxy.method.plugin.openjsip.proxy.plugins.RegisterPlugin.registrar.rmi.port = 1099
    proxy.method.plugin.openjsip.proxy.plugins.RegisterPlugin.registrar.rmi.objectname = Registrar
And then IT WORKED!!!

What version of the product are you using? On what operating system?
v0.0.4
windows 8 pro.

Please provide any additional information below.

Original issue reported on code.google.com by [email protected] on 28 May 2014 at 9:42

How to include new functionality in Location servie

What steps will reproduce the problem?
1. Added a new method signature in LocationServiceInterface
2. Implement it in LocationService
3. Build and try to run

What is the expected output? What do you see instead?
Location service is not running cause new method signature Symbol not found.

What version of the product are you using? On what operating system?
v0.0.4

Please provide any additional information below.
As of in Ubuntu 14.04 and Java-8 is not working I tried in Windows-7 with Java-8

Original issue reported on code.google.com by [email protected] on 12 Jan 2015 at 9:54

location-service not starting on java version "1.7.0_65" (linux)

What steps will reproduce the problem?
1.starting location-service
2.
3.

What is the expected output? What do you see instead?
Java exception

What version of the product are you using? On what operating system?

 v0.0.4

linux
Please provide any additional information below.

Hi!
I'm running openjsip on linux with java "1.7.0_65", but when starting 
location-service it shows the exception below:
2014-10-15 20:52:33,220  [main] ERROR - 
java.rmi.ServerException: RemoteException occurred in server thread; nested 
exception is: 
    java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is: 
    java.lang.ClassNotFoundException: openjsip.remote.locationservice.LocationServiceInterface
    at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:419)
    at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:267)
    at sun.rmi.transport.Transport$1.run(Transport.java:177)

Someone has the same error?

Original issue reported on code.google.com by [email protected] on 15 Oct 2014 at 9:06

sipml5 + openjsip

HI, could I use sipml5 + openjsip to develop a p2p chat program? or need any 
other lib?

Original issue reported on code.google.com by [email protected] on 12 Mar 2013 at 3:37

Sip server running, what code can I build as client?

Hi 
I am new to JAVA. I am using openjsip to test sip protocol.I have openjsip 
service running on my machine, I want to know  which online tool ir soucecode 
for it can I use as client to registration and communication  with server?

Thanks.

Original issue reported on code.google.com by [email protected] on 16 Apr 2013 at 12:30

why rmi?

Why are the registrar, proxy and location service separate processes connected 
via RMI?  Why not have all three in the same VM?  Isn't is better for 
performance?

Original issue reported on code.google.com by [email protected] on 21 Sep 2012 at 2:09

Project homepage contains broken links to readme and changelog

What steps will reproduce the problem?
1. Navigate to https://code.google.com/p/openjsip/
2. Click "changelog" or "readme" link

What is the expected output? What do you see instead?
The web page is not available.

Original issue reported on code.google.com by wheleph on 22 Aug 2013 at 8:59

Project homepage contains broken link to JAIN-SIP

What steps will reproduce the problem?
1. Go to project homepage https://code.google.com/p/openjsip/
2. Click on link "JAIN-SIP project" (https://jain-sip.dev.java.net/)

What is the expected output? What do you see instead?
The web page is not available.

Original issue reported on code.google.com by wheleph on 22 Aug 2013 at 8:47

Question

Hello,

I have an existing (client/server) application where people have to do an
'unmanned' logon using a Java Application. Now, I've got a question from my
customer if it is possible to build a simple 'softphone' in the Java
Application. I don't need much GUI (the addresses have to be in a
configuration file). The GUI for the caller: one button for start call and
one button for stop call.

Can I use OpenJSip for this kind of application of can you guide me to a
good solution... 

Thank you very much!

Best regards,
Stijn Vandenbroucke.

Original issue reported on code.google.com by [email protected] on 31 Oct 2009 at 9:59

how to validate sip uri

Hi

Can some buddy help me to validate SIP Uri.

Thanks in advance

Original issue reported on code.google.com by [email protected] on 30 Dec 2011 at 4:00

How can Integrate mysql databse for store sip uri,

Hi

Could you please suggest how can I integrate mysql databse in location service 
for storing sip user's information like permanent sip and temporary sip uri and 
so on..

Thanks

Original issue reported on code.google.com by [email protected] on 21 Dec 2014 at 11:40

Exception: Connection timed out - via TCP

Hi,

i am developing with JAIN-SIP and i am using openjsip as a server.
Via UDP everthing works fine, but i would like to hold a tcp - Connection to 
the SIP - Proxy. When i send a register Request to the stateful proxy, the 
proxy receives it and the registrar creates a 200 OK reply, but it seems that 
the proxy does'nt get this reply. Instead of forwarding the OK reply, after 
about 20 seconds, it generates the output below.

I am using Proxy v0.0.4 on Debian-Squeeze.


....DEBUG - Exception: Connection timed out
....TRACE - Exception dump: javax.sip.SipException: Connection timed out
    at gov.nist.javax.sip.stack.SIPServerTransaction.sendResponse(SIPServerTransaction.java:1383)
    at openjsip.proxy.Proxy.processIncomingRequest(Unknown Source)
    at openjsip.proxy.Proxy.processRequest(Unknown Source)
    at gov.nist.javax.sip.EventScanner.deliverEvent(EventScanner.java:223)
    at gov.nist.javax.sip.EventScanner.run(EventScanner.java:492)
    at java.lang.Thread.run(Thread.java:722)
2013-04-15 12:49:20,062  [EventScannerThread] TRACE - Transaction terminated at 
Debian-60-squeeze-64-LAMP. CT = null  ST = 
gov.nist.javax.sip.stack.SIPServerTransaction@e0f8fca

Original issue reported on code.google.com by [email protected] on 15 Apr 2013 at 11:05

Project homepage contains invalid download instructions

The project have been migrated to Git however its homepage still contains 
instructions for Subversion

Original issue reported on code.google.com by wheleph on 22 Aug 2013 at 9:01

Error found in Proxy source code.

Hi, I downloaded source code of OPNJSIP and i was only interested in proxy. so 
I created a project in Netbeans and import all proxy related files in that 
project. But when i ran the project , it gave error.Error summary and location 
is as under.
1. Proxy.java file, at line 631
" methodPlugin.initialize(pluginProperties, this);"

2. Proxy.java file, line 2503
"transactionsMapping.getResponseContext().addFinalResponse(response);"

3.Proxy.java , line 2680
"Response bestResponse = 
transactionsMapping.getResponseContext().getBestResponse(messageFactory);"


Could anyone please help me in this regard.
Thanks in advance

Original issue reported on code.google.com by [email protected] on 29 Apr 2014 at 7:40

registered endpoints question

Hi,

Is there a way to get a view of the current registrations?  Such as a 
connection to the RMI registry?

Is there a way a SIP client can send a SIP request to the registrar to get a 
list of the current registrations?

Thanks,

Paul

Original issue reported on code.google.com by [email protected] on 4 Nov 2011 at 3:43

Can not start Location Service in Linux raspberrypi 3.10.25

Hi

Location service does not start with following errors in Linux raspberrypi 
3.10.25

pi@raspberrypi ~/openjsip $ bin/openjsip start location-service
bin/openjsip: 1: bin/openjsip: realpath: not found
ls: cannot access /lib/jain-sip-api*.jar: No such file or directory
ls: cannot access /lib/openjsip-remote*.jar: No such file or directory
Starting Location Service...
bin/openjsip: 119: bin/openjsip: cannot create /bin/location-service.pid: 
Permission denied
pi@raspberrypi ~/openjsip $ Error: Cannot open configuration file 
conf/location-service.properties

Please help if any body already solve this issues!!

Thanks

Original issue reported on code.google.com by [email protected] on 25 Dec 2014 at 4:29

record route

hi, Is there any way to disable record routing header.  I want to skip the 
proxy after the 200OK message.  Thanks.

Original issue reported on code.google.com by [email protected] on 20 Sep 2012 at 12:58

RMI security class not found exception

We had 2 different machines experience a strange issue with the location server 
starting up.  The rmiregistry is running, but the location service will abort 
at startup with a unmarshalling exception, stating that the class loader could 
not be started.  I could not figure out what the problem is.  Have you ever 
seen this?

Original issue reported on code.google.com by [email protected] on 6 Nov 2011 at 8:39

Recommend Projects

React

A declarative, efficient, and flexible JavaScript library for building user interfaces.
Vue.js

🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
Typescript

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
TensorFlow

An Open Source Machine Learning Framework for Everyone
Django

The Web framework for perfectionists with deadlines.
Laravel

A PHP framework for web artisans
D3

Bring data to life with SVG, Canvas and HTML. 📊📈🎉

Recommend Topics

javascript

JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
web

Some thing interesting about web. New door for the world.
server

A server is a program made to process requests and deliver data to clients.
Machine learning

Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
Visualization

Some thing interesting about visualization, use data art
Game

Some thing interesting about game, make everyone happy.

Recommend Org

Facebook

We are working to build community through open source technology. NB: members must have two-factor auth.
Microsoft

Open source projects and samples from Microsoft.
Google

Google ❤️ Open Source for everyone.
Alibaba

Alibaba Open Source for everyone
D3

Data-Driven Documents codes.
Tencent

China tencent open source team.