Database connectivity problem..! Help..!

Hi,
I have an application running on Windows platform deployed on Weblogic. This application is trying to access a Database which is configured on Redhat Linux 4 -I configure it as a JDBC connection pool in the weblogic, now if i test the connectivity it fails..!! Any suggestions or help?
Thanks

can you please ellaborate more on that -how do you do:
1. Connection pool in DB
2, Configure the dispatcher paramater.
I have two connection pool configured in my weblogic pointing to two different DB (One to Windows and the other to Linux)
Thanks

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Hi,
I failed to connect Tomcat 5.0.24 with Postgresql
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<Context path="/database"
docBase="${catalina.home}/webapps/database" debug="0"
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Immediate HELP in Tomcat 5 to Postgresql 7.4 database connectivity problem (cont.)
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hi
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Hello Friends .
I am facing problem in database connectivity with JSP . Following is the code .
<%
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---------------------------------------------------------------------------------------------------------------------------------------------------------------------

Please use CODE tags when posting code. You are losing some of the plus signs of string concatenation to the forum's formatting beast.
Preferred solution: Don't use Access as a database. The JDBC-ODBC bridge is always troublesome.
If you must use Access...
Well the message is easy enough to understand: it can't find the database db1.mdb.
You say you put db1.mdb in the web directory. Obviously the computer is not looking there (silly computer for not looking where you put the file)
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Using application.getRealPath("/db1.mdb") in place of "db1.mdb" will probably work in a JSP.
String databaseURL = accessDBURLPrefix + application.getRealPath("/db1.mdb") + accessDBURLSuffix;cheers,
evnafets

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Edited by: gokhangulgezen on May 31, 2011 6:38 AM

It's the DBMS. Oracle particularly can react this way when there are too many connection requests
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Hi,
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Thanks in advance
Manjunath
Edited by: 814259 on 2010/11/21 23:47
Edited by: 814259 on 2010/11/21 23:49

Thank you for the replies
The problem got solved. Problem was older version of Oracle driver was placed in WEB-INF/lib and a directory called lbrary(we created it) above WEB-INF, we were placed newer version of driver in oracle's jdbc/lib directory and specified that path in classpath. But by default the older version was prioritized and used by application so we were getting the exception mentioned. When we deleted older version of driver everything got working. This explation may help for those who have similar type of problems.
Thanks

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ODP.NET 9.2.0.700
Oracle 9i PatchSet 11
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Hope that helps,
Greg

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MySQL server: 123.123.123.123
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Password: *******
Database: databaseName
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I think you should implement a Singleton class.
something like this....
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public static Connection getDB(String arg1, String arg2) {
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:D

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1.
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/f3f93ee7-0c01-0010-2593-d7c28b5377c2
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Reward points if find useful.
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Then I have startet the SQL Server 5.0 with mysqld --console from the command line.
Furthermore I have added under Project-Properties-Java Build Path - Libraries - Add External JARs in Eclipse the mysql-connector-java-3.1.11-bin.jar to my Struts WebProject.
To test the whole thing I have added to the existing test-database from mysql a table named owner and wanted to test the database connection in the Action-class with the following statements - I quote the whole execute method of the OwnerAction class:
public ActionForward execute(
                 ActionMapping mapping,
                 ActionForm form,
                 HttpServletRequest request,
                 HttpServletResponse response)
                 throws Exception {
               OwnerForm ownerForm = (OwnerForm) form;
               String greet = ownerForm.getGreet();
               String name = ownerForm.getName();
               request.setAttribute("name", name);
               request.setAttribute("greet", greet);
               String address = ownerForm.getAddress();
               String email = ownerForm.getEmail();
               int tel = ownerForm.getTel();
               Connection conn = null;
               Statement stmt = null;
               ResultSet rs = null;
               DriverManager.registerDriver(new org.gjt.mm.mysql.Driver());
               conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/test","root","sa");
               try {
                     //conn = dataSource.getConnection();
                     stmt = conn.createStatement();
                     int id = 0;
                     rs = stmt.executeQuery("select max(id) as counter from owner");
                     while(rs.next()){
                        id = rs.getInt("counter");
                     id += 1;
                     stmt.executeUpdate("insert into owner values("+id+", '"+greet+"', '"+name+"', '"+email+"', '"+address+"', "+tel+")");
                     rs.close();
                     stmt.close();
                     conn.close();
                  catch(SQLException e){
                     throw new SQLException("database error");
                  // Forward control to the specified success target
                  return (mapping.findForward("success"));
      }But when I execute the WebApplication and the Action will be called the following error message appears in the browser:
HTTP Status 500 -
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
javax.servlet.ServletException: Servlet execution threw an exception
     org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81)
root cause
java.lang.NoClassDefFoundError: org/gjt/mm/mysql/Driver
     com.asprise.struts.action.OwnerAction.execute(OwnerAction.java:72)
     org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484)
     org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)
     org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
     org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
     org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5 logs.
It must depend with anything that the driver was not found but I have defined it in the CLASSPATH variable and added it to the Web-Project in eclispe.
Has anybody an idea what I have else made wrong or have forgotten??:(:(:(
thanks in advance
lg
pat

One thing I have forgotten - I have also copied the mysql-connector-java-3.1.11-bin.jar in the WebRoot\WEB-INF\lib directory of my EasyStruts WebApplication.
Can anything else be wrong??:(:((
regards

Database Connection Problem in Oracle9i Lite Web-to-Go

Hi
I am having problem in the Database Connectivity. I am using the OracleDriver class for the connection and have defined the DataSource in the struts-config.xml as
<data-sources>
<data-source>
<set-property property="driverClass"
value="oracle.jdbc.driver.OracleDriver" />
<set-property property="url"
value="jdbc:oracle:thin:@192.50.200.201:1521:WEBTOGO.WORLD" />
<set-property property="maxCount"
value="5"/>
<set-property property="minCount"
value="1"/>
<set-property property="user"
value="master"/>
<set-property property="password"
value="ramchow"/>
</data-source>
</data-sources>
But when I am trying to do any database transaction it is throwing the following exception..
log9: [ERROR] ActionServlet - -Initializing application data source org.apache.s
truts.action.DATA_SOURCE <java.sql.SQLException: Io exception: Connection refuse
d(DESCRIPTION=(TMP=)(VSNNUM=153093120)(ERR=12505)(ERROR_STACK=(ERROR=(CODE=12505
)(EMFI=4))))>java.sql.SQLException: Io exception: Connection refused(DESCRIPTION
=(TMP=)(VSNNUM=153093120)(ERR=12505)(ERROR_STACK=(ERROR=(CODE=12505)(EMFI=4))))
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:180)
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:222)
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:335)
at oracle.jdbc.driver.OracleConnection.<init>(OracleConnection.java:361)
at oracle.jdbc.driver.OracleDriver.getConnectionInstance(OracleDriver.ja
va:442)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:321)
at org.apache.struts.legacy.GenericDataSource.createConnection(GenericDa
taSource.java:805)
at org.apache.struts.legacy.GenericDataSource.open(GenericDataSource.jav
a:741)
at org.apache.struts.action.ActionServlet.initModuleDataSources(ActionSe
rvlet.java:1085)
at org.apache.struts.action.ActionServlet.init(ActionServlet.java:472)
at javax.servlet.GenericServlet.init(GenericServlet.java:258)
at oracle.lite.web.JupServlet.createInstance(JupServlet.java:349)
at oracle.lite.web.JupServlet.getServlet(JupServlet.java:322)
at oracle.lite.web.JupServlet.service(JupServlet.java:216)
at oracle.lite.web.AppServletHandler.handle(AppServletHandler.java:297)
at oracle.lite.web.JupApplication.service(JupApplication.java:550)
at oracle.lite.web.JupHandler.handle(JupHandler.java:109)
at oracle.lite.web.HTTPServer.process(HTTPServer.java:306)
at oracle.lite.web.HTTPServer.handleRequest(HTTPServer.java:162)
at oracle.lite.web.JupServer.handle(JupServer.java:310)
at oracle.lite.web.SocketListener.process(SocketListener.java:172)
at oracle.lite.web.SocketListener$ReqHandler.run(SocketListener.java:226
log9: javax.servlet.UnavailableException: Initializing application data source o
rg.apache.struts.action.DATA_SOURCE
log9: at org.apache.struts.action.ActionServlet.initModuleDataSources(ActionSe
rvlet.java:1091)
log9: at org.apache.struts.action.ActionServlet.init(ActionServlet.java:472)
log9: at javax.servlet.GenericServlet.init(GenericServlet.java:258)
log9: at oracle.lite.web.JupServlet.createInstance(JupServlet.java:349)
log9: at oracle.lite.web.JupServlet.getServlet(JupServlet.java:322)
log9: at oracle.lite.web.JupServlet.service(JupServlet.java:216)
log9: at oracle.lite.web.AppServletHandler.handle(AppServletHandler.java:297)
log9: at oracle.lite.web.JupApplication.service(JupApplication.java:550)
log9: at oracle.lite.web.JupHandler.handle(JupHandler.java:109)
log9: at oracle.lite.web.HTTPServer.process(HTTPServer.java:306)
log9: at oracle.lite.web.HTTPServer.handleRequest(HTTPServer.java:162)
log9: at oracle.lite.web.JupServer.handle(JupServer.java:310)
log9: at oracle.lite.web.SocketListener.process(SocketListener.java:172)
log9: at oracle.lite.web.SocketListener$ReqHandler.run(SocketListener.java:226.
Can anybody guide me what can be the problem asap.
regards
ramchow

Ramesh,
This looks like it might be a Java class mismatch error. Do you have multiple versions of Java installed on your machine? If so, you may want to keep one version and remove the rest.
If you're already running just one version, you may want to check the registry and classpath for references to multiple Java versions, or version that no longer exist.
Please let me know if you have additional questions.
Junius

Database connectivity problem with instant client.

Guys,
I've installed the Oracle instant client basic and ODBC files in my system.
But when I create a system DSN and test the connectivity my database connectivity,it fails with
ORA-12637:Packet receive failed error
My TNSNAMES reads below:
ONDSP101.DIGITALINDIASW.NET =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = namesrv1.xy.zz.com)(PORT = 1522))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = ONDSP101)
and my SQLNET as below:
AUTOMATIC_IPC = OFF
TRACE_LEVEL_CLIENT = ON
SQLNET.INBOUND_CONNECT_TIMEOUT=20
NAMES.DEFAULT_DOMAIN = na.pg.com
NAME.DEFAULT_ZONE = na.pg.com
SQLNET.CRYPTO_SEED = "kdg:9yv2$-plo*u6b2x!"
NAMES.DIRECTORY_PATH = (ONAMES,TNSNAMES)
NAMES.PREFERRED_SERVERS =
(ADDRESS_LIST =
(ADDRESS =
(COMMUNITY = TCP.xy.zz.com)
(PROTOCOL = TCP)
(Host = namesrv1.xy.zz.com)
(Port = 1522)
(ADDRESS =
(COMMUNITY = TCP.xy.zz.com)
(PROTOCOL = TCP)
(Host = namesrv2.xy.zz.com)
(Port = 1522)
I've placed my TNSNAMES and SQLNET file in the same folder having the instant client files and I've set my TNSADMIN,LD_LIBRARY_PATH and PATH environmental variable to the folder location.
Note:I'm able to connect to the database using SQLplus.
Thanks,
Bhagat

12637, 00000, "Packet receive failed"
// *Cause: A process was unable to receive a packet from another process.
// Possible causes are:
// 1. The other process was terminated.
// 2. The machine on which the other process is running went down.
// 3. Some other communications error occurred.
// *Action: If the cause is not obvious, contact Oracle Customer Support.
These days I very seldom use ODBC for Oracle - most recently it was simply to get Enterprise Architect to "talk" to Oracle. I never used it for my client applications (unlike in the fast distant past), so what I know about ODBC is seriously outdated.
Even so, a few comments. :-)
Have you tried creating a user DSN, in case a system DSN somehow works different environment wise?
The above error description sounds like the original TCP connection was successful (i.e. it is not a host unknown or not reachable error). Subsequent packets seem to fails.
To confirm, run the listener on namesrv1.xy.zz.com with logging enabled and have a look at the listener.log - does it show a connection being accepted/handled from your PC when you use the ODBC DSN?
Have you tried the Oracle ODBC drivers? When getting EA connected I had problems (also with Instant Client) and Microsoft ODBC driver for Oracle. Downloaded and installed the Oracle ODBC driver and it worked just fine first time around.
PS. You should raise this topic on the Instant Client Forum instead.

Database connectivity problem..! Help..!

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