Oracle JDBC Driver and OC4J 9.0.2.0.0A

Where is the JDBC Driver located in OC4J 9.0.2.0.0A? In
1.0.2.2.1 it was located in j2ee\home\lib (as it should be
IMHO). In OC4J 9.0.2.0.0A there is no file classes12.zip at all
(only classes12dms.jar?)
Any hints would be very welcome.
Regards
Stefan

Oracle JDBC driver is in jdbc\lib directory
jdbc directory is in the sae level as j2ee directory

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Hi
I have some java code which uses Oracle jdbc driver.
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java.sql.SQLException: The Network Adapter could not establish the connection
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Hi
I have some java code which uses Oracle jdbc driver.
This code works with java 1.1.8, 1.2 & 1.3 but not with java 1.4 !
I have that exception :
java.sql.SQLException: The Network Adapter could not establish the connection
at oracle/jdbc/dbaccess/DBError.check_error(DBError.java)
at oracle/jdbc/driver/OracleConnection.<init>(OracleConnection.java)
at oracle/jdbc/driver/OracleDriver.getConnectionInstance(OracleDriver.java)
at oracle/jdbc/driver/OracleDriver.connect(OracleDriver.java)
at java/sql/DriverManager.getConnection(DriverManager.java:529)
at java/sql/DriverManager.getConnection(DriverManager.java:179)
at SimpleQuery.<init>(SimpleQuery.java:21)
at SimpleQuery.main(SimpleQuery.java:56)
when I try a getConnection...
I've tried all the jdbc drivers provided by Oracle, but it's still the same problem !
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Oracle JDBC driver and the object types cache

Hi there,
Oracle JDBC Developer's Guide and Reference says (version 11gR1):
Oracle JDBC drivers cache array and structure descriptors. This provides enormous performance benefits. However, it means that if you change the underlying type definition of a structure type in the database, the cached descriptor for that structure type will become stale and your application will receive a SQLException exception.http://download.oracle.com/docs/cd/B28359_01/java.111/b31224/oraoot.htm#g1104293
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Is there a workaround to disable that "feature"?
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Luis Cabral wrote:
jschell wrote:
Although if you are changing the object structure then the code to deal with it must change as well. So, especially in developement, why is restarting a problem?It is not that restarting per se is a problem. Here us developers do not have the required privileges to restart the JDBC pool and we have to ask the DBA to do it, and sometimes he is not immediately available. It is not a big thing but this can impact the development process.Your development process is hideously flawed then.
The pool exists in the JEE server. And from your first post it seems that you have permission to restart that but not to access the management console. It is ridiculous to have access the the former and not the later.
Not to mention that you should have your own JEE instance to develop on. Actually it is weird to me that a DBA would even be touching a JEE server. The competent ones I know don't even know how to do that. They know the database not the application servers.
>
In addition, having to restart a whole JDBC pool just because you changed a database object definition does not seem very flexible to me. Such issue does not exist in other connection types, for instance in OCI connections, that is why I thought there should be an option to turn it off if required.
Well specifically you have to restart the pool because you were USING the object that changed.
And I am rather certain that you can turn off the pool entirely.
Even in production, I reckon that this may have a negative impact. For instance, say that you need to deploy a hot fix for a bug in one application that involves the re-creation of one single object type. This means that the whole JDBC pool, which may be used by other applications, may have to be shut down just because of that single object.Good point.
I suggest you stop using complex objects in Oracle. I suspect that would eliminate the problem completely.

Oracle JDBC Driver 10.1.0.4.0 and IndexOutOfBounds-Exception

Hello all,
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java.lang.ArrayIndexOutOfBoundsException
at java.lang.System.arraycopy(Native Method)
at oracle.jdbc.driver.T4CDateAccessor.saveDataFromOldDefineBuffers(T4CDateAccessor.java:212)
at oracle.jdbc.driver.T4CPreparedStatement.saveDefineBuffersIfRequired(T4CPreparedStatement.java:405)
at oracle.jdbc.driver.OracleStatement.prepareAccessors(OracleStatement.java:859)
at oracle.jdbc.driver.OracleStatement.execute_maybe_describe(OracleStatement.java:949)
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at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:2905)
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at weblogic.jdbc.wrapper.PreparedStatement.executeQuery(PreparedStatement.java:124)
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Oracle 10.1.0 jdbc driver and 9i Database

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Thanks

Sorry for not including my error:
Hello all,
I am getting an error "Bigger type length than Maximum" when calling a stored procedure that returns a small result set. I am not working with BLOBs or CLOBs and cannot find anything on the web that addresses my specific situation.
I would greatly appreciate any help available in solving this problem.
Here is my data access object:
package my.app.access;
import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import oracle.jdbc.OracleTypes;
import oracle.jdbc.OracleTypes.*;
import my.app.beans.Person;
import my.app.util.Database;
public class PersonAccess {
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          Database db = new Database();
          Connection con = db.connect();
          ResultSet rs;
          CallableStatement cs = con
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               person.setLastname((String) rs.getString("last_name"));
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And here is a test object:
package my.app.access;
import my.app.beans.*;
public class testAccess {
     * @param args
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          } catch (Exception e) {
               e.printStackTrace();
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java.sql.SQLException: Bigger type length than Maximum
     at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:124)
     at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:161)
     at oracle.jdbc.driver.DatabaseError.check_error(DatabaseError.java:884)
     at oracle.jdbc.driver.T4CMAREngine.buffer2Value(T4CMAREngine.java:2230)
     at oracle.jdbc.driver.T4CMAREngine.unmarshalUB4(T4CMAREngine.java:1146)
     at oracle.jdbc.driver.T4CTTIoac.unmarshal(T4CTTIoac.java:215)
     at oracle.jdbc.driver.T4C8TTIuds.unmarshal(T4C8TTIuds.java:121)
done
     at oracle.jdbc.driver.T4CTTIdcb.receiveCommon(T4CTTIdcb.java:125)
     at oracle.jdbc.driver.T4CTTIdcb.receiveFromRefCursor(T4CTTIdcb.java:103)
     at oracle.jdbc.driver.T4CResultSetAccessor.unmarshalOneRow(T4CResultSetAccessor.java:165)
     at oracle.jdbc.driver.T4CTTIrxd.unmarshal(T4CTTIrxd.java:787)
     at oracle.jdbc.driver.T4CTTIrxd.unmarshal(T4CTTIrxd.java:704)
     at oracle.jdbc.driver.T4C8Oall.receive(T4C8Oall.java:526)
     at oracle.jdbc.driver.T4CCallableStatement.doOall8(T4CCallableStatement.java:179)
     at oracle.jdbc.driver.T4CCallableStatement.execute_for_rows(T4CCallableStatement.java:782)
     at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1027)
     at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:2887)
     at oracle.jdbc.driver.OraclePreparedStatement.execute(OraclePreparedStatement.java:2978)
     at oracle.jdbc.driver.OracleCallableStatement.execute(OracleCallableStatement.java:4102)
     at my.app.access.PersonAccess.getPerson(PersonAccess.java:68)
     at my.app.access.testAccess.main(testAccess.java:17)
I am only having this problem when using the 10g jdbc driver, 9.2.0.4 and up are fine.
Thanks again.....

Oracle JDBC Driver, SQL, and erroneous ORA-00942

We've been running the following prepared statement without trouble for several months: "SELECT ST FROM STATELT WHERE UPPER(ST)=UPPER(?) OR UPPER(STATE)=UPPER(?) OR UPPER(ABBREV)=UPPER(?) ", using the latest version of the Oracle JDBC drivers. The code that calls the statement, in this case, substitutes "ME" for the three ? characters via setString().
Yesterday, we pointed our application to an identically populated schema running on the same Oracle 8.1.6.1.0 server. The only difference was that the schema name was 11 characters long rather than six. The STATELT synonym was valid, and could be queried via SQL*PLUS. However, running the query produced an ORA-00942: "table or view does not exist" error.
Here's the really weird bit: Adding a space to the above anywhere that is legal including before SELECT, at the very end of the SQL, between SELECT and ST (so that there are 2 spaces there), on either side of any of the ='s, all make the SQL work.
We tried this with an older 8.1.6 JDBC driver and the latest version from the Oracle TechNet site (downloaded yesterday), on three separate computers, and on Windows 2000 and Linux. The problem does seem to be specific to the new schema, but we see no reason why.
I'd like to know what's up here, since it is shipping software. I'm beginning to suspect that the Oracle Server itself might be responsible, rather than the JDBC driver per se.

Luis Cabral wrote:
jschell wrote:
Although if you are changing the object structure then the code to deal with it must change as well. So, especially in developement, why is restarting a problem?It is not that restarting per se is a problem. Here us developers do not have the required privileges to restart the JDBC pool and we have to ask the DBA to do it, and sometimes he is not immediately available. It is not a big thing but this can impact the development process.Your development process is hideously flawed then.
The pool exists in the JEE server. And from your first post it seems that you have permission to restart that but not to access the management console. It is ridiculous to have access the the former and not the later.
Not to mention that you should have your own JEE instance to develop on. Actually it is weird to me that a DBA would even be touching a JEE server. The competent ones I know don't even know how to do that. They know the database not the application servers.
>
In addition, having to restart a whole JDBC pool just because you changed a database object definition does not seem very flexible to me. Such issue does not exist in other connection types, for instance in OCI connections, that is why I thought there should be an option to turn it off if required.
Well specifically you have to restart the pool because you were USING the object that changed.
And I am rather certain that you can turn off the pool entirely.
Even in production, I reckon that this may have a negative impact. For instance, say that you need to deploy a hot fix for a bug in one application that involves the re-creation of one single object type. This means that the whole JDBC pool, which may be used by other applications, may have to be shut down just because of that single object.Good point.
I suggest you stop using complex objects in Oracle. I suspect that would eliminate the problem completely.

Oracle jdbc driver: sort order between letters and numbers

Hello,
I am facing a very strange problem with sortering of data between letters and numbers.
I'am executing the following SQL request:
SELECT nummsg FROM CWD01 where nummsg = '00000001' or nummsg = 'AAAA0001' order by nummsg
When this request is executed with sqlplus or SQuirreL, I receive the expected result:
NUMMSG
00000001
AAAA0001
When I execute the following java code:
try {     String className = "oracle.jdbc.driver.OracleDriver";     Class driverObject = Class.forName(className);     Connection con = DriverManager.getConnection("myurl", "user", "pass");     Statement stmt = con.createStatement();     ResultSet rs = stmt.executeQuery(           "SELECT nummsg FROM CWD01 where nummsg = '00000001' or nummsg = 'AAAA0001' order by nummsg");     while (rs.next()) {           String x = rs.getString("nummsg");           System.out.println("nummsg " +x);     } } catch (Exception e) {     System.out.println("Failed: Driver Error: "+ e.getMessage()); }
I receive the unexpected result:
nummsg AAAA0001
nummsg 00000001
We are using the following version of Oracle:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bi
and the following jdbc driver:
Oracle Database 10g Release 2 (10.2.0.1.0) JDBC Drivers (ojdbc14.jar (1,536,979 bytes) - classes for use with JDK 1.4 and 1.5)
Any suggestion?

I checked, I'am sure of the problem:
package test;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
public class Test {
     public static void main(String[] args) {
          try {
               String className = "oracle.jdbc.driver.OracleDriver";
               Class driverObject = Class.forName(className);
               Connection con = DriverManager.getConnection("jdbc:oracle:thin:@<server>[:<1521>]:<database_name>", "user", "password");
               Statement stmt = con.createStatement();
               ResultSet rs = stmt.executeQuery(
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                    String x = rs.getString("nummsg");
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}The table CWD01 defines the column NUMMSG as VARCHAR2(8).
The output gives:
nummsg AAAA0001
nummsg 00000001

Web Server 6.1 and ClassNotFoundException: oracle.jdbc.driver.OracleDriver

I am trying to set up the Oracle jdbc on Sun ONE Web Server Enterprise Edition 6.1 but do not seem to be having any luck. It seems that OCI and thin fails.
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oracle.jdbc.driver.*,
oracle.sql.*
"%>
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<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>
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</head>
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Java Tab
JVM path Settings
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Native Lib Path Prefix = c:\j2sdk1.4.2_02\lib
Native Lib Path Suffix =
JDBC Connection Pools
Pool = jdbc-oracle-pool
DataSource Classname = oracle.jdbc.pool.Oracle.DataSource
URL = wydot-ops2
User = username
Password = password
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oracle.jdbc.driver.OracleDriver is deprecated, you may be having an issue with that. Try oracle.jdbc.OracleDriver instead.
Typically you don't need to registerDriver, just load the classes:
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Hello all,
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Hi Stefano ,
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Have no idea about timeout setting in JDBC .
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Oracle JDBC driver 10g and xMII

I have a BLS that tries inserting CLOB data into Oracle 10g database. Since Oracle 8 JDBC driver does not support that (I saw other SDN messages on the same issue), I have download and copied Oracle JDBC driver for 10g
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Are you really sure this "SetBig.." thing is the solution?
Searching for the ORA error you posted results in quite a few solutions in the way you write your SQL statement.
Maybe changing your statement might help.
If you don't mind can you post the SQL statement?
Another good test would be to see if the SQL statement goes through without any errors when used from a different SQL editor.I would suggest do that first if you haven't already.

Oracle jdbc driver class and classes12.jar whether deprecated.?

Hi All,
1. In one of the post, it has been told that oracle.jdbc.driver.OracleDriver will be deprecated and also recommended to used oracle.jdbc.OracleDriver.
According to that post, I changed the driver class name in my code as below:
Class.forName("oracle.jdbc.OracleDriver");
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Enumeration<Driver> driverEnum = DriverManager.getDrivers();
+while (driverEnum.hasMoreElements()){+
System.out.println("driver : "driverEnum.nextElement());+
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INFO : The Oracle JDBC Driver (classes12.jar) version is 10.2.0.4.0.
2. We are using classes12.jar for developing all JDBC code. In Oracle Database 11g Release 2 (11.2.0.2.0) JDBC Drivers, there is no classes12.jar. Is this deprecated? Which jar can be used instead of classes12.jar?
Thanks in advance.

In Oracle Database 11g Release 2 (11.2.0.2.0) JDBC Drivers, there is no classes12.jar. Is this deprecated? Which jar can be used instead of classes12.jar?For JDBC 4.0 features ojdbc6.jar with JDK 6.0.
For JDBC 3.0 support ojdbc 5.jar with JDK 5.0
http://www.oracle.com/technetwork/database/enterprise-edition/jdbc-112010-090769.html

Error oracle.sql.* and oracle.jdbc.driver.* not found when using oracle as a database

I am using oracle as database and weblogic 4.5. I have copied the classes12.zip file in lib directory of weblogic. I am getting the error that oracle.sql.* and oracle.jdbc.driver.* not found when i am importing these packages in a jsp file. what i need to do to import oracle driver packages?I put it in the classpath also.
Please Advice!
Thanks in advance
AnuPama

Hi Anupama,
First of all I would be surprised if you would not like to use the connection pooling feature of weblogic (in which case you might not be needing the import the classes directly), and would like to open direct connections to your database. Anyways for doing that I would recommend you to check out the readme doc that ships
along with the jdbc oracle (classes12.zip etc). I am giving an excerpt over here:
These are a few simple things that you should do in your JDBC program:
1. Import the necessary JDBC classes in your programs that use JDBC.
For example:
import java.sql.*;
import java.math.*;
2. Register the Oracle driver before before calling other JDBC APIs.
(This is not needed if you are using the JDBC Server-side Internal
Driver because registration is done automatically in the server.)
To register the Oracle driver, make sure the following statement
is executed at least once in your Java session:
DriverManager.registerDriver(
new oracle.jdbc.driver.OracleDriver());
3. Open a connection to the database with the getConnection call.
Different connection URLs should be used for different JDBC
drivers. The following examples demonstrate the different URLs.
For the JDBC OCI8 Driver:
Connection conn = DriverManager.getConnection(
"jdbc:oracle:oci8:@<database>",
"scott", "tiger");
where <database> is either an entry in tnsnames.ora or a SQL*net
name-value pair.
For the JDBC Thin Driver, or Server-side Thin Driver:
Connection conn = DriverManager.getConnection(
"jdbc:oracle:thin:@<database>",
"scott", "tiger");
where <database> is either a string of the form
<host>:<port>:<sid> or a SQL*net name-value pair.
For the JDBC Server-side Internal Driver:
Connection conn = DriverManager.getConnection(
"jdbc:oracle:kprb:");
Note that the trailing ':' character is necessary. When you use
the Server-side Internal Driver, you always connect to the
database you are executing in. You can also do this:
Connection conn
= new oracle.jdbc.driver.OracleDriver().defaultConnection();
Hope this helps,
Thanks,
Anupama wrote:
I am using oracle as database and weblogic 4.5. I have copied the classes12.zip file in lib directory of weblogic. I am getting the error that oracle.sql.* and oracle.jdbc.driver.* not found when i am importing these packages in a jsp file. what i need to do to import oracle driver packages?I put it in the classpath also.
Please Advice!
Thanks in advance
AnuPama--
Apurb Kumar

Duplicate class definition: oracle/jdbc/driver/OracleDriver

Hi
I using Jdeveloper 10.1.3.3 and I tried to add jdbc driver version 11.1.0.6.0 to Project by add Library to the project property. And I tried to run my application when step to connect database the program will occur the error.
This below is the error
500 Internal Server Error
oracle.classloader.util.AnnotatedLinkageError: duplicate class definition: oracle/jdbc/driver/OracleDriver
     Invalid class: oracle.jdbc.driver.OracleDriver
     Loader: current-workspace-app.root:0.0.0
     Code-Source: /D:/oracle/jdbc/11/ojdbc5.jar
     Configuration: <library> in /D:/Jdev10133/jdev/mywork/Trainning/Trainning-oc4j-app.xml
     Dependent class: java.sql.DriverManager
     Loader: jre.bootstrap:1.5.0_06
     Code-Source: unknown
     Configuration: jre bootstrap
     at oracle.classloader.PolicyClassLoader.findLocalClass (PolicyClassLoader.java:1462) [D:/Jdev10133/j2ee/home/lib/pcl.jar (from system property java.class.path), by sun.misc.Launcher$AppClassLoader@17332331]     at oracle.classloader.SearchPolicy$FindLocal.getClass (SearchPolicy.java:167) [D:/Jdev10133/j2ee/home/lib/pcl.jar (from system property java.class.path), by sun.misc.Launcher$AppClassLoader@17332331]     at oracle.classloader.SearchSequence.getClass (SearchSequence.java:119) [D:/Jdev10133/j2ee/home/lib/pcl.jar (from system property java.class.path), by sun.misc.Launcher$AppClassLoader@17332331]     at oracle.classloader.SearchPolicy.loadClass (SearchPolicy.java:645) [D:/Jdev10133/j2ee/home/lib/pcl.jar (from system property java.class.path), by sun.misc.Launcher$AppClassLoader@17332331]     at oracle.classloader.PolicyClassLoader.askParentForClass (PolicyClassLoader.java:1289) [D:/Jdev10133/j2ee/home/lib/pcl.jar (from system property java.class.path), by sun.misc.Launcher$AppClassLoader@17332331]     at oracle.classloader.SearchPolicy$AskParent.getClass (SearchPolicy.java:68) [D:/Jdev10133/j2ee/home/lib/pcl.jar (from system property java.class.path), by sun.misc.Launcher$AppClassLoader@17332331]     at oracle.classloader.SearchSequence.getClass (SearchSequence.java:119) [D:/Jdev10133/j2ee/home/lib/pcl.jar (from system property java.class.path), by sun.misc.Launcher$AppClassLoader@17332331]     at oracle.classloader.PolicyClassLoader.internalLoadClass (PolicyClassLoader.java:1674) [D:/Jdev10133/j2ee/home/lib/pcl.jar (from system property java.class.path), by sun.misc.Launcher$AppClassLoader@17332331]     at oracle.classloader.PolicyClassLoader.loadClass (PolicyClassLoader.java:1635) [D:/Jdev10133/j2ee/home/lib/pcl.jar (from system property java.class.path), by sun.misc.Launcher$AppClassLoader@17332331]     at oracle.classloader.PolicyClassLoader.loadClass (PolicyClassLoader.java:1620) [D:/Jdev10133/j2ee/home/lib/pcl.jar (from system property java.class.path), by sun.misc.Launcher$AppClassLoader@17332331]     at java.lang.ClassLoader.loadClassInternal (ClassLoader.java:319) [jre bootstrap, by jre.bootstrap:1.5.0_06]     at java.lang.Class.forName0 (Native method) [unknown, by unknown]     at java.lang.Class.forName (Class.java:242) [jre bootstrap, by jre.bootstrap:1.5.0_06]     at java.sql.DriverManager.getCallerClass (DriverManager.java:442) [jre bootstrap, by jre.bootstrap:1.5.0_06]     at java.sql.DriverManager.getConnection (DriverManager.java:519) [jre bootstrap, by jre.bootstrap:1.5.0_06]     at java.sql.DriverManager.getConnection (DriverManager.java:171) [jre bootstrap, by jre.bootstrap:1.5.0_06]     at com.util.Util.getConnection (Util.java:14) [D:/Jdev10133/jdev/mywork/Trainning/DBProgramming/classes/ (from <classpath> in D:\Jdev10133\jdev\mywork\Trainning\DBProgramming\public_html), by current-workspace-app.web.dbprogram:0.0.0]     at com.blob.BLOBTest.uploadFileToDB (BLOBTest.java:37) [D:/Jdev10133/jdev/mywork/Trainning/DBProgramming/classes/ (from <classpath> in D:\Jdev10133\jdev\mywork\Trainning\DBProgramming\public_html), by current-workspace-app.web.dbprogram:0.0.0]     at com.upload.doPost (upload.java:28) [D:/Jdev10133/jdev/mywork/Trainning/DBProgramming/classes/ (from <classpath> in D:\Jdev10133\jdev\mywork\Trainning\DBProgramming\public_html), by current-workspace-app.web.dbprogram:0.0.0]     at javax.servlet.http.HttpServlet.service (HttpServlet.java:763) [D:/Jdev10133/j2ee/home/lib/servlet.jar (from <code-source> (ignore manifest Class-Path) in META-INF/boot.xml in D:\Jdev10133\j2ee\home\oc4j.jar), by api:1.4.0]     at javax.servlet.http.HttpServlet.service (HttpServlet.java:856) [D:/Jdev10133/j2ee/home/lib/servlet.jar (from <code-source> (ignore manifest Class-Path) in META-INF/boot.xml in D:\Jdev10133\j2ee\home\oc4j.jar), by api:1.4.0]     at com.evermind[Oracle Containers for J2EE 10g (10.1.3.3.0) ].server.http.ServletRequestDispatcher.invoke (ServletRequestDispatcher.java:713) [D:/Jdev10133/j2ee/home/lib/oc4j-internal.jar (from <code-source> in META-INF/boot.xml in D:\Jdev10133\j2ee\home\oc4j.jar), by oc4j:10.1.3]     at com.evermind[Oracle Containers for J2EE 10g (10.1.3.3.0) ].server.http.ServletRequestDispatcher.forwardInternal (ServletRequestDispatcher.java:370) [D:/Jdev10133/j2ee/home/lib/oc4j-internal.jar (from <code-source> in META-INF/boot.xml in D:\Jdev10133\j2ee\home\oc4j.jar), by oc4j:10.1.3]     at com.evermind[Oracle Containers for J2EE 10g (10.1.3.3.0) ].server.http.HttpRequestHandler.doProcessRequest (HttpRequestHandler.java:871) [D:/Jdev10133/j2ee/home/lib/oc4j-internal.jar (from <code-source> in META-INF/boot.xml in D:\Jdev10133\j2ee\home\oc4j.jar), by oc4j:10.1.3]     at com.evermind[Oracle Containers for J2EE 10g (10.1.3.3.0) ].server.http.HttpRequestHandler.processRequest (HttpRequestHandler.java:453) [D:/Jdev10133/j2ee/home/lib/oc4j-internal.jar (from <code-source> in META-INF/boot.xml in D:\Jdev10133\j2ee\home\oc4j.jar), by oc4j:10.1.3]     at com.evermind[Oracle Containers for J2EE 10g (10.1.3.3.0) ].server.http.HttpRequestHandler.serveOneRequest (HttpRequestHandler.java:221) [D:/Jdev10133/j2ee/home/lib/oc4j-internal.jar (from <code-source> in META-INF/boot.xml in D:\Jdev10133\j2ee\home\oc4j.jar), by oc4j:10.1.3]     at com.evermind[Oracle Containers for J2EE 10g (10.1.3.3.0) ].server.http.HttpRequestHandler.run (HttpRequestHandler.java:122) [D:/Jdev10133/j2ee/home/lib/oc4j-internal.jar (from <code-source> in META-INF/boot.xml in D:\Jdev10133\j2ee\home\oc4j.jar), by oc4j:10.1.3]     at com.evermind[Oracle Containers for J2EE 10g (10.1.3.3.0) ].server.http.HttpRequestHandler.run (HttpRequestHandler.java:111) [D:/Jdev10133/j2ee/home/lib/oc4j-internal.jar (from <code-source> in META-INF/boot.xml in D:\Jdev10133\j2ee\home\oc4j.jar), by oc4j:10.1.3]     at oracle.oc4j.network.ServerSocketReadHandler$SafeRunnable.run (ServerSocketReadHandler.java:260) [D:/Jdev10133/j2ee/home/lib/oc4j-internal.jar (from <code-source> in META-INF/boot.xml in D:\Jdev10133\j2ee\home\oc4j.jar), by oc4j:10.1.3]     at com.evermind[Oracle Containers for J2EE 10g (10.1.3.3.0) ].util.ReleasableResourcePooledExecutor$MyWorker.run (ReleasableResourcePooledExecutor.java:303) [D:/Jdev10133/j2ee/home/lib/oc4j-internal.jar (from <code-source> in META-INF/boot.xml in D:\Jdev10133\j2ee\home\oc4j.jar), by oc4j:10.1.3]     at java.lang.Thread.run (Thread.java:595) [jre bootstrap, by jre.bootstrap:1.5.0_06]
Please help to suggest me. How should I do to let out this error?
Thanks

many people use the two interchangeably, though technically it can mean something different.
What you get back from a call to newInstance() is the same as what you'd get when using the new keyword and no constructor arguments, a reference to an instance of a class (there are other ways to dynamically create an instance using other constructors).
"Creating a class object" technically means loading the class which causes a Class instance (so an instance of the class Class) to be created for that particular class, making the class available to the JVM for instantiation of instances.
newInstance() and its sisters are useful for when the class to be instantiated is not known (or even doesn't exist) when compiling the class that needs to instantiate it.
This is of course the case with JDBC. The people creating the JVM can't know what driver classes will be out there at some point in the future (and if they did know and have access to all of them in the past it would still be foolish to have them all hardwired into the JVM).

HELP!!! Cannot deploy J2EE application with Oracle JDBC driver...

Hi,
I am writing a J2EE application which (in theory, at least)
connects to an Oracle 9i database.
I have written a simple Java test app utilising only the
java.sql package classes (e.g. Connection, ResultSet) to directly
connect to the database. As long as the classes12.zip is in the
CLASSPATH it works fine.
Now I have written an Enterprise application (SessionBean,
Remote and Home interface and Client) which I am attempting to
deploy via deploytool.
If I include just the client jar and EJB jar in the application
it deploys okay but when I run the application (using runclient)
it produces the following error:
java.lang.NoClassDefFoundError: oracle/jdbc/OracleDriver
(It is nested within other error output but that is the core
issue).
However if I try to include the JAR libraries into the app
(classes12.jar and nls_charset.jar from $ORACLE_HOME/jdbc/lib),
then I get the following output from deploytool when I hit the
"deploy" (or "redeploy") button:
Deployment error: invalid entry compressed size
(expected 14411 but got 14580 bytes)
Can someone please tell me what is going on???
How can I deploy the J2EE application including the Oracle
JDBC Driver???
My only other option at the moment is to place all the function-
-ality in the client and not use the J2EE framework.
Any help is greatly appreciated.
Regards,
Ben New
Leftclick Software Development
[email protected]

OK Ben,
I admit I'm a bit confused. Let me see if I understand where you're
coming from.
You have written a J2EE application that includes a session bean,
correct? If so, your session bean needs to be deployed to an EJB
container. What container are you using? The Oracle 9i database
has an embedded EJB container which (theoretically) you can use.
However, as far as I know, Oracle recommends you use OC4J as the
EJB container. So again I ask, what EJB container are you using?
If, as you say, you are new to EJB, then I think you should
immediately start working wiht OC4J as your EJB container.
Did you look at the tutorial link I gave in my previous post? It
explains -- step by step -- how to create, deploy and run a J2EE
application using OC4J as the EJB container. It also has links to
introductory material for people without little knowledge of J2EE
and EJB.
I have 9iAS Enterprise Edition and 8.1.7.1.0 database server (and
OC4J) installed on my SUN machine. I cannot find any of the
utilities you mention -- "j2eeadmin","runclient" or "deploytool".
What Oracle software have you installed? What are the versions?
What platform are you using?
A J2EE application (according to the specification from SUN)
consists of modules. A module can either be a client module or an
EJB module. A client module can either be a java application client
or a web-based client (servlet or JSP). A J2EE application usually
contains one client module and one EJB module. A J2EE application
needs to be deployed to a J2EE container.
Hopefully the J2EE picture is becoming clearer. I think you need
to read some introductory material regarding J2EE if you intend
to become proficient at it.
I feel that you are under the impression that a J2EE application
is a glorified JDBC application. It isn't (as far as I'm aware).
Good Luck,
Avi.

Oracle JDBC Driver and OC4J 9.0.2.0.0A

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