Comments on: Supporting Oracle FCF in Tomcat

By: Kerem

Kerem — Fri, 23 Apr 2010 23:45:13 +0000

Hi, we are exactly following the Tomcat JDBC guideline for opening connections in JSP.

By: ASR

ASR — Fri, 23 Apr 2010 22:25:45 +0000

Thanks Kerem , actually i realized i was not connection oracle connection pool datasource that problem is addressed, but when the DB is shutdown its not able to failover smoothly.

Can you please share your sample JSP code.

By: Kerem

Kerem — Mon, 05 Apr 2010 05:55:26 +0000

You seem to have entered the wrong username/password combination.

By: ASR

ASR — Mon, 05 Apr 2010 00:27:10 +0000

I try to setup exactly but im getting below exception.

java.sql.SQLException: User credentials doesn't match the existing ones
        at oracle.jdbc.pool.OracleImplicitConnectionCache.validateUser(OracleImplicitConnectionCache.java:296)
        at oracle.jdbc.pool.OracleImplicitConnectionCache.defaultUserPrePopulateCache(OracleImplicitConnectionCache.java:216)
        at oracle.jdbc.pool.OracleImplicitConnectionCache.(OracleImplicitConnectionCache.java:198)
        at oracle.jdbc.pool.OracleConnectionCacheManager.createCache(OracleConnectionCacheManager.java:298)
        at oracle.jdbc.pool.OracleDataSource.cacheInitialize(OracleDataSource.java:412)
        at oracle.jdbc.pool.OracleDataSource.getConnection(OracleDataSource.java:393)
        at oracle.jdbc.pool.OracleDataSource.getConnection(OracleDataSource.java:179)
        at oracle.jdbc.pool.OracleDataSource.getConnection(OracleDataSource.java:157)
        at org.apache.jsp.Testfanpool_jsp._jspService(Testfanpool_jsp.java:73)

any help in this will be greatly appreciated.

By: Kerem

Kerem — Fri, 01 Jan 2010 15:09:25 +0000

I am glad that I could help.

Cheers.

By: Jiann

Jiann — Fri, 01 Jan 2010 12:20:14 +0000

Hi Kerem,

Thank you, I am now able to connect. Your information is definitely valuable, save me for sure the hassle. Appreciate.

Rgds,
Jiann

By: Kerem

Kerem — Fri, 01 Jan 2010 10:32:04 +0000

Hi Jiann,

I edited the post to include the ONS configuration on the client side. Please read the section starting with the creation of ons.config file.

By: Jiann

Jiann — Fri, 01 Jan 2010 08:23:10 +0000

Hi Karem,

I am unable to use due to failure to setup the ONS, and I am using tomcat similarly to yours. Can give me some pointers how do you setup the ONS? I asked my DBA and he said the ONS at the DB side has already setup, but I believe on the client side also requires this, am I right? Any help will be very much appreciated.

By: Kerem

Kerem — Thu, 26 Nov 2009 17:08:28 +0000

Hi, as far as I know, if you don’t have fastConnectionFailoverEnabled=”true”, it will default to false and you won’t be able to use FCF for this pool. Also, you must enable Implicit Caching or FCF will definitely not work. I have never worked with WebLogic, but the directives should be the same.

By: gtcol

gtcol — Thu, 26 Nov 2009 14:22:22 +0000

Hi Kerem
I read your article, it is very well described for Tomcat users. I’ve Weblogic v10.3, jdk 1.6, jdbc6_g.jar with Oracle RAC 10.2.0.4 on RHEL4. We recently had issue with production rac, App server continuously thre stack thread error. We don’t have the fastConnectionFailoverEnabled=”true”
clause in our jdbc pool file. Does it mean we haven’t enabled FCF in our RAC? Is FCF defaulted to true?
Following is our jdbc pool file element:

-
60
0
1
0
200
10
600
0
1000
0
60
jdbc:oracle:thin:@(DESCRIPTION=(ADDRESS_LIST=(LOAD_BALANCE=ON)(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.21.61)(PORT=10521))(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.21.64)(PORT=10521))(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.21.67)(PORT=10521)))(CONNECT_DATA=(SERVICE_NAME=ipServ)))
nodes=192.168.21.61:6200,192.168.21.64:6200,192.168.21.67:6200
HawkeyeLog” driver=”oracle.jdbc.driver.OracleDriver” url=”jdbc:oracle:thin:@(DESCRIPTION=(ADDRESS_LIST=(LOAD_BALANCE=ON)(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.21.61)(PORT=10521))(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.21.64)(PORT=10521))(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.21.67)(PORT=10521)))(CONNECT_DATA=(SERVICE_NAME=ipServ)))” onsConfig=”nodes=192.168.21.61:6200,192.168.21.64:6200,192.168.21.67:6200″ username=”ipServUsr” password=”" />

Thanks