Trying to connect to Oracle using Web App

Question

Hi Guys, I'm hoping someone here can help. This question goes out to anyone who has tried to connect to an Oracle database via web application written using Java Server Pages and Servlets. There is a specific file called the context.xml that contains the connection parameters to Oracle. Please note thread of conversation derived from a Java forum I've posted to earlier.
The bottom line is that "orcl" is the SID value for the Oracle database. The connection pool apparently isn't able to create connection objects based on the SID value given. When I attempt to run the test.jsp page in the browser I get the error message noted below. I still don't know how to fix this and simply must get it working.
Any advise is welcome.
Alan
I'm putting together a test page test.jsp in Tomcat that attempts to access my Oracle database running on the same machine. The point here is just to make sure I have the connection parameters correctly set before proceeding too far into the web application.
In my context.xml file I have the following:
<Resource name="jdbc/myoracle" auth="Container"
              type="javax.sql.DataSource" driverClassName="oracle.jdbc.OracleDriver"
              url="jdbc:oracle:thin:@127.0.0.1:1521:orcl"
              username="BASIC_USER" password="tiger" maxActive="6" maxIdle="3"
              maxWait="10000"/> In my web.xml file I have the following:
<resource-ref>
      <description>Oracle Datasource example</description>
      <res-ref-name>jdbc/myoracle</res-ref-name>
      <res-type>javax.sql.DataSource</res-type>
      <res-auth>Container</res-auth>
</resource-ref>My test.jsp page simply attempts to open a connection with the database and to display data from one table.
When I go into the browser to open the page I get the following SQLExceptioin error:
SQL Problem: Cannot create PoolableConnectionFactory (Listener refused the connection with the following error: ORA-12505, TNS:listener does not currently know of SID given in connect descriptor )
SQL State: null
Vendor Error: 0
It refers to the SID value in the descriptor. Well...you can see from the descriptor that I've written "orcl". That is the SID. url="jdbc:oracle:thin:@127.0.0.1:1521:orcl"
At this point I'm spinning my wheels. I don't know what else to do to make this work.
Please advise.
Alan
[Dukes Earned 111] Karanjit
Posts:459
Registered: 2/28/08
Re: Tying test jsp page in Tomcat
Jul 23, 2009 12:31 AM (reply 1 of 2) (In reply to original post )
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Oracle docs say:
ORA-12505:TNS:listener does not currently know of SID given in connect descriptor
Cause: The listener received a request to establish a connection to a database or other service. The connect descriptor received by the listener specified a SID for an instance (usually a database instance) that either has not yet dynamically registered with the listener or has not been statically configured for the listener. This may be a temporary condition such as after the listener has started, but before the database instance has registered with the listener.
Action:
- Wait a moment and try to connect a second time.
- Check which instances are currently known by the listener by executing: lsnrctl services <listener name>
- Check that the SID parameter in the connect descriptor specifies an instance known by the listener.
- Check for an event in the listener.log file.
[Dukes Earned 0] ashiers
Posts:126
Registered: 12/26/01
Re: Tying test jsp page in Tomcat
Jul 23, 2009 7:40 AM (reply 2 of 2) (In reply to #1 )
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Thanks for the description for the Error message 12505. It doesn't help much. This I did find out by running this command: LSNRCTL SERVICES LISTENER
C:\>LSNRCTL SERVICES LISTENER
LSNRCTL for 32-bit Windows: Version 11.1.0.6.0 - Production on 23-JUL-2009 11:12
:00
Copyright (c) 1991, 2007, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))
Services Summary...
Service "orcl" has 1 instance(s).
Instance "orcl", status READY, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:545 refused:0 state:ready
LOCAL SERVER
Service "orclXDB" has 1 instance(s).
Instance "orcl", status READY, has 1 handler(s) for this service...
Handler(s):
"D000" established:64 refused:0 current:0 max:1022 state:ready
DISPATCHER <machine: DOHWS1911, pid: 804>
(ADDRESS=(PROTOCOL=tcp)(HOST=DOHWS1911)(PORT=1101))
Service "orcl_XPT" has 1 instance(s).
Instance "orcl", status READY, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:545 refused:0 state:ready
LOCAL SERVER
The command completed successfully
So, according to this orcl is the correct SID parameter. Please advise further.
Alan

Answer 1

sb92075 wrote:
Listener Log File c:\oracle11g\diag\tnslsnr\DOHWS1911\listener\alert\log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC1521ipc)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=DOHWS1911)(PORT=1521)))
Please note HOST=DOHWS1911.
Does DOHWS1911 map to 127.0.0.1?
post results from following command
tnsping orcl
Please post last 2 - 3 dozen lines from c:\oracle11g\diag\tnslsnr\DOHWS1911\listener\alert\log.xml
take very soon after the error is reported
Yes DOHWS1911 is the host name given to my computer and probably is mapped to 127.0.0.1.
When I ran tnspring orcl I get:
C:\>tnspring orcl
'tnspring' is not recognized as an internal or external command,
operable program or batch file.
Following is the tail end of the log.xml file after attempting to connect:
<msg time='2009-07-23T16:41:02.031-03:00' org_id='oracle' comp_id='tnslsnr'
type='UNKNOWN' level='16' host_id='DOHWS1911'
host_addr='10.1.186.192'>
<txt>23-JUL-2009 16:41:02 * service_update * orcl * 0
</txt>
</msg>
<msg time='2009-07-23T16:41:20.031-03:00' org_id='oracle' comp_id='tnslsnr'
type='UNKNOWN' level='16' host_id='DOHWS1911'
host_addr='10.1.186.192'>
<txt>23-JUL-2009 16:41:20 * service_update * orcl * 0
</txt>
</msg>
<msg time='2009-07-23T16:41:53.031-03:00' org_id='oracle' comp_id='tnslsnr'
type='UNKNOWN' level='16' host_id='DOHWS1911'
host_addr='10.1.186.192'>
<txt>23-JUL-2009 16:41:53 * service_update * orcl * 0
</txt>
</msg>
<msg time='2009-07-23T16:42:01.562-03:00' org_id='oracle' comp_id='tnslsnr'
type='UNKNOWN' level='16' host_id='DOHWS1911'
host_addr='10.1.186.192'>
<txt>23-JUL-2009 16:42:01 * (CONNECT_DATA=(CID=(PROGRAM=)(HOST=)(USER=SYSTEM))(COMMAND=services)(ARGUMENTS=64)(SERVICE=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=DOHWS1911)(PORT=1521))))(VERSION=185599488)) * services * 0
</txt>
</msg>
<msg time='2009-07-23T16:42:02.546-03:00' org_id='oracle' comp_id='tnslsnr'
type='UNKNOWN' level='16' host_id='DOHWS1911'
host_addr='10.1.186.192'>
<txt>23-JUL-2009 16:42:02 * (CONNECT_DATA=(CID=(PROGRAM=)(HOST=)(USER=SYSTEM))(COMMAND=status)(ARGUMENTS=64)(SERVICE=(ADDRESS=(PROTOCOL=TCP)(HOST=DOHWS1911)(PORT=1521)))(VERSION=185599488)) * status * 0
</txt>
</msg>
<msg time='2009-07-23T16:43:30.984-03:00' org_id='oracle' comp_id='tnslsnr'
type='UNKNOWN' level='16' host_id='DOHWS1911'
host_addr='10.1.186.192'>
<txt>23-JUL-2009 16:43:30 * (CONNECT_DATA=(SID=mysid)(CID=(PROGRAM=)(HOST=__jdbc__)(USER=SHIERSAJ))) * (ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=1594)) * establish * mysid * 12505
</txt>
</msg>
<msg time='2009-07-23T16:43:31.000-03:00' org_id='oracle' comp_id='tnslsnr'
type='UNKNOWN' level='16' host_id='DOHWS1911'
host_addr='10.1.186.192'>
<txt>TNS-12505: TNS:listener does not currently know of SID given in connect descriptor
</txt>
</msg>GOD! It doesn't get any more Greek than this!
What does it all mean? HELP!
Alan