Comments on: Supporting Oracle FCF in Tomcat

By: Kerem

Kerem — Fri, 02 Dec 2011 16:16:19 +0000

Hi Johnny,

I also get this problem time to time. It seems to be an Oracle 10g issue. 11g does not have this problem.

By: Johnny Redbeard

Johnny Redbeard — Wed, 30 Nov 2011 17:02:04 +0000

Kerem:
Great article, the connection pool has been favorable to me, yet recently I have been running into this error.

java.sql.SQLException: Invalid or Stale Connection found in the Connection Cache
at oracle.jdbc.driver.SQLStateMapping.newSQLException(SQLStateMapping.java:70)
at oracle.jdbc.driver.DatabaseError.newSQLException(DatabaseError.java:131)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:197)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:261)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:269)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:490)
at oracle.jdbc.pool.OracleImplicitConnectionCache.getConnection(OracleImplicitConnectionCache.java:403)
at oracle.jdbc.pool.OracleDataSource.getConnection(OracleDataSource.java:374)
at oracle.jdbc.pool.OracleDataSource.getConnection(OracleDataSource.java:178)
at oracle.jdbc.pool.OracleDataSource.getConnection(OracleDataSource.java:156)

My Resource attributes are as such:
connectionCacheName=”CXCACHE-pb_28″
connectionCacheProperties=”{MaxStatementsLimit=5, MinLimit=1, MaxLimit=100, ValidateConnection=true, InactivityTimeout=10, ConnectionWaitTimeout=10}”
connectionCachingEnabled=”true”
maxActive=”10″
maxIdle=”1″
minIdle=”1″
removeAbandoned=”true”
validationQuery = “select 1 from dual”
testOnBorrow = “true”

Any idea on why this is happening?

Thanks,
Johnny

By: srinivasan

srinivasan — Thu, 12 May 2011 22:29:42 +0000

It is a very good article. Will let you know, after, i tiry it out.

Thanks Again,

Sri

By: Kerem

Kerem — Wed, 11 Aug 2010 20:35:29 +0000

Hello Ken,

Unfortunately no, I have no experience with DataGuard.

By: Ken

Ken — Wed, 11 Aug 2010 16:45:18 +0000

Before I go home-brewing from your examples, I’d like to ask if you’ve had any experience applying this (or a similar) approach against an Oracle DataGuard 10g environment…no load-balancing, fast connection failover enabled?

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.