Hi,
are you sure that you have put the jdbc drivers for oracle in
the common/lib directory of tomcat .... somehitng tells me that there is
an issue with the JDBC driver jars .... but I may be totally wrong ....
Regards
Guru
------------------------------------------------------------------------
-----------
Gurumoorthy Raghupathy
Email : [EMAIL PROTECTED]
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-----Original Message-----
From: Natasha N Wright [mailto:[EMAIL PROTECTED]
Sent: 08 March 2007 15:39
To: Tomcat Users List
Subject: Re: Cannot create resource instance
Thanks, but i followed the examples on the tomcat site. I have removed
the factory declaration from server.xml but this still doesnt help I'm
still getting a Cannot create resource instance error, i have pasted the
stack dump to offer more clarity.
Cheers,
Natasha
STACK DUMP
-----------
Error naming exception:
javax.naming.NamingException: Cannot create resource instance
at
org.apache.naming.factory.ResourceFactory.getObjectInstance(ResourceFact
ory.java:142)
at
javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:304)
at
org.apache.naming.NamingContext.lookup(NamingContext.java:787)
at
org.apache.naming.NamingContext.lookup(NamingContext.java:134)
at
org.apache.naming.NamingContext.lookup(NamingContext.java:775)
at
org.apache.naming.NamingContext.lookup(NamingContext.java:147)
at servlet.openConnection(Unknown Source)
at servlet.init(Unknown Source)
at
org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.jav
a:888)
at
org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:6
21)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValv
e.java:163)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:596)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:4
33)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValv
e.java:144)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:596)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:4
33)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:235
8)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java
:133)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:596)
at
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherVa
lve.java:118)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:594)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java
:116)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:594)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:4
33)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.
java:127)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nvokeNext(StandardPipeline.java:596)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:4
33)
at
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
at
org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:152)
at
org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:300)
at
org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:374)
at
org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:743)
at
org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:
675)
at
org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:866)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool
.java:683)
at java.lang.Thread.run(Thread.java:539)
Cannot create resource instance
David Smith wrote:
> Then I would point you to
>
> http://tomcat.apache.org/tomcat-4.1-doc/jndi-resources-howto.html
> and
>
http://tomcat.apache.org/tomcat-4.1-doc/jndi-datasource-examples-howto.h
tml
>
> for some excellent information on setting up this stuff. I don't
think
> you have to spec a resource factory as the built-in one for
datasources
> is a slightly refactored (package rename only) version of DBCP. Also,
> the JDBC driver needs to be stored in common/lib of the tomcat
> installation. Lastly, unless you are directly using the commons-dbcp
> package or the commons-pool package in your code, the
> commons-dbcp-xx.xx.jar and commons-pool.jar are not necessary in
WEB-INF.
>
> --David
>
> Natasha N Wright wrote:
>
>> I am using Tomcat version 4. with JDK 1.4 (quite old i know!)
>>
>> David Smith wrote:
>>
>>> Before we can offer any relevant advice, please let us know which
>>> version of tomcat you are working with. There are configuration
>>> differences between 5.0.x and 5.5.x.
>>>
>>> --David
>>>
>>> Natasha N Wright wrote:
>>>
>>>> Hi,
>>>>
>>>> I am trying to create a servlet which connects to a oracle
>>>> database. My servlet is called from an HTML form. When it is
>>>> called i recieve a
>>>> javax naming exception Cannot create resource instance error.
>>>> Please can someone advise me what I need to configure? I get no
>>>> tomcat errors on startup.
>>>> Thankyou
>>>>
>>>> i am calling the db connection with the following java:
>>>> ---------------------------------
>>>> Context initial = new InitialContext();
>>>> Context envContext = (Context)initial.lookup("java:/comp/env");
>>>> DataSource ds = (DataSource)envContext.lookup("jdbc/maindb");
>>>> tcon = ds.getConnection();
>>>>
>>>> server.xml (within <context>)
>>>> --------------------------
>>>> <Resource name="jdbc/maindb" auth="Container"
>>>> type="javax.sql.DataSource" />
>>>> <ResourceParams name="jdbc/maindb">
>>>> <parameter>
>>>> <name>driverClassName</name>
>>>> <value>oracle.jdbc.driver.OracleDriver</value>
>>>> </parameter>
>>>> <parameter>
>>>> <name>factory</name>
>>>> <value>org.apache.commons.dbcp.BasicDataSourceFactory</value>
>>>> </parameter>
>>>> <parameter>
>>>> <name>url</name>
>>>>
<value>jdbc:oracle:[EMAIL PROTECTED]:1512:maindb</value>
>>>> </parameter>
>>>> <parameter>
>>>> <name>user</name>
>>>> <value>nnw03u</value>
>>>> </parameter>
>>>> <parameter>
>>>> <name>password</name>
>>>> <value>******</value>
>>>> </parameter>
>>>> <parameter>
>>>> <name>maxActive</name>
>>>> <value>20</value>
>>>> </parameter>
>>>> <parameter>
>>>> <name>maxIdle</name>
>>>> <value>10</value>
>>>> </parameter>
>>>> <parameter>
>>>> <name>maxWait</name>
>>>> <value>-1</value>
>>>> </parameter>
>>>> </ResourceParams>
>>>>
>>>> web.xml
>>>> ------------------
>>>> <resource-ref>
>>>> <res-ref-name>jdbc/maindb</res-ref-name>
>>>> <res-type>javax.sql.DataSource</res-type>
>>>> <res-auth>Container</res-auth>
>>>> </resource-ref>
>>>>
>>>> Jar files in WEB-INF/lib
>>>> ---------------------------
>>>> classes12.jar
>>>> jasper-compiler.jar
>>>> commons-collections-3.1.jar
>>>> jasper-runtime.jar
>>>> commons-dbcp-1.2.1.jar
>>>> jsp-api.jar
>>>> commons-dbcp-1.2.jar
>>>> mysql-connector-java-3.1.8-bin.jar
>>>> commons-el.jar
>>>> naming-factory-dbcp.jar
>>>> commons-pool-1.3.jar
>>>> naming-java.jar
>>>> jasper-compiler-jdt.jar
>>>>
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>>>> legislation.
>>>>
>>>>
>
>
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