Could not open windows registry node… Windows RegOpenKey(...) returned error code 2 message

Catherine Wong

When I run an OMM consumer application on Windows machine,
the application prints the messages below. Please advice.

Aug 15, 2017 2:00:06 PM java.util.prefs.WindowsPreferences
openKey

WARNING: Could not open windows registry node
Software\JavaSoft\Prefs\com\reuter

s\rfa\_/System at root 0x80000002. Windows RegOpenKey(...)
returned error code 2.

BackingStoreException during checkForLink for path:
/com/reuters/rfa/_System

Aug 15, 2017 2:00:06 PM java.util.prefs.WindowsPreferences
WindowsRegOpenKey1

WARNING: Trying to recreate Windows registry node Software\JavaSoft\Prefs\com\re

uters\rfa\_/System\/Event/Queue at root 0x80000002.

Aug 15, 2017 2:00:06 PM java.util.prefs.WindowsPreferences
openKey

WARNING: Could not open windows registry node
Software\JavaSoft\Prefs\com\reuter

s\rfa\_/System\/Event/Queue at root 0x80000002. Windows
RegOpenKey(...) returned

error code 2.

BackingStoreException during checkForLink for path:
/com/reuters/rfa/_System/Eve

ntQueue

…

pimchaya.wongrukun01

According to the given warning/error messages,RFA Java fails to read some nodes in the
registry while RFA is trying to load the configuration from the registry. It is
possible that Windows OS does not allow the application to access the nodes
in the registry because the user running the application does not have the permission.

I suggest you use one of the following ways to protect/fix the
problem:

A. Login as Administrator which is allowed to access all
nodes in the registry then run the application by Administrator.

or

B. Create RFA Java configuration under the User node which the user running the application can access.
The client can initialize RFA Java configuration from the file as the steps
below:

1) Login as the user running
the application

2) Set serverList and portNumber parameter of consConnection node in <RFAJ package>\QuickStart\quickstart.xml to be host and port of the server. For example: to connect to
the server name adsserver at port 14002, the configuration is:

<node name="consConnection">
   <map>
        < entry key="connectionType" value="RSSL"/>
        < entry key="serverList" value="adsserver"/>
        < entry key="portNumber" value="14002"/>
   </map>
</node>

3) Save the file.

4) Import the file to the
registry. Open cmd and go to <RFAJ package>\Tools\. Then, type the following
command:

java -jar config_loader.jar -file ..\QuickStart\quickstart.xml

5)The client can see the
configuration is under the User node by running config_editor.bat in <RFAJ package>\Tools\ as the example shown below:

Note:

- config_editor.bat can be used to modify the
RFA configuration as well.

- the client
needs to run the application to read the session named myNamespace::consSession

or

C. Modify the application to read RFA Java configuration
from ConfigDb setting in the application.
Hence, the application does not read RFA Java configuration from the registry;
there is no error from accessing registry failure. By using this way, the
client does not have to setup RFA Java configuration in the registry on every
machine where he would like to run the application. Please see the example
source code below:

import com.reuters.rfa.config.ConfigDb;
…
void initializeConfigDb(ConfigDb configDb)
{
 configDb.addVariable("myNamespace.Sessions.consSession.connectionList","consConnection");
 configDb.addVariable("myNamespace.Connections.consConnection.connectionType","RSSL");
 configDb.addVariable("myNamespace.Connections.consConnection.serverList","adsserver");
 configDb.addVariable("myNamespace.Connections.consConnection.portNumber","14002");
}
…
public void init()
{
  …
//Context.initialize();
 ConfigDb configDb = new ConfigDb();
 initializeConfigDb(configDb);
 Context.initialize(configDb);

 // Create a Session
 String sessionName = CommandLine.variable("session");
 //_session = Session.acquire(sessionName);
 _session = Session.acquire("myNamespace::consSession");
 …
}