Re: Security manager changing the jdbc Connection class?

The jar file should have a org/postgresql/jdbc2/AbstractJdbc2Connection
in it.  AbstractJdbc3Connection extends AbstractJdbc2Connection so both
are necessary.

--Barry


Rich Cullingford wrote:
> All,
> This bizarre behaviour occurs after I compile the jdbc jar from source
> (/usr/local/java/jdk->j2sdk1.4.1, 'configure' & 'gmake' build a JDBC3
> edition driver). I placed 'postgresql.jar' in /usr/local/java/lib, which
> is in CLASSPATH.
>
> The server has been set up to receive TCP/IP connections. Now I compile
> and run basic.java in the 'examples' directory, and (with debug 'on') get:
>
> [rculling@thriller example]$ java basic jdbc:postgresql:rculling rcu
> ng debug
> PostgreSQL basic test v6.3 rev 1
>
> DriverManager.initialize: jdbc.drivers = null
> JDBC DriverManager initialized
> registerDriver: driver[className=org.postgresql.Driver,org.postgresq
> 2e08]
> Connecting to Database URL = jdbc:postgresql:rculling
> DriverManager.getConnection("jdbc:postgresql:rculling")
>     trying driver[className=org.postgresql.Driver,org.postgresql.Dri
> Exception in thread "main" java.lang.NoClassDefFoundError: org/postg
> AbstractJdbc2Connection
>         at java.lang.ClassLoader.defineClass0(Native Method)
>         at java.lang.ClassLoader.defineClass(ClassLoader.java:502)
>         at java.security.SecureClassLoader.defineClass(SecureClassLo
> 3)
>         at java.net.URLClassLoader.defineClass(URLClassLoader.java:2
>         at java.net.URLClassLoader.access$100(URLClassLoader.java:54
>         at java.net.URLClassLoader$1.run(URLClassLoader.java:193)
>         at java.security.AccessController.doPrivileged(Native Method
>         at java.net.URLClassLoader.findClass(URLClassLoader.java:186
>         at java.lang.ClassLoader.loadClass(ClassLoader.java:299)
>         at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:
>         at java.lang.ClassLoader.loadClass(ClassLoader.java:255)
>         at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:
>         at java.lang.ClassLoader.defineClass0(Native Method)
>         at java.lang.ClassLoader.defineClass(ClassLoader.java:502)
>         at java.security.SecureClassLoader.defineClass(SecureClassLo
> 3)
>         at java.net.URLClassLoader.defineClass(URLClassLoader.java:2
>         at java.net.URLClassLoader.access$100(URLClassLoader.java:54
>         at java.net.URLClassLoader$1.run(URLClassLoader.java:193)
>         at java.security.AccessController.doPrivileged(Native Method
>         at java.net.URLClassLoader.findClass(URLClassLoader.java:186
>         at java.lang.ClassLoader.loadClass(ClassLoader.java:299)
>         at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:
>         at java.lang.ClassLoader.loadClass(ClassLoader.java:255)
>         at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:
>         at java.lang.Class.forName0(Native Method)
>         at java.lang.Class.forName(Class.java:140)
>         at org.postgresql.Driver.connect(Driver.java:121)
>         at java.sql.DriverManager.getConnection(DriverManager.java:5
>         at java.sql.DriverManager.getConnection(DriverManager.java:1
>         at basic.<init>(basic.java:37)
>         at basic.main(basic.java:212)
>
> The relevant source line in org.postgresql.Driver.connect says it's
> attempting a Class.forName("org.postgresql.jdbc3.Jdbc3Connection"), but
> by the time the error registers, the system seems to be attempting to
> load "org.postgres.jdbc2.AbstractJdbc2Cnnection."  The jar file has an
> AbstractJdbc3Connection, but not Jdbc2. Is something funny happening in
> the do.Privileged() calls by the SecurityManager?
>
> I'm stumped. Thanks for any help.
>                               Rich Cullingford
>
>
>
>
>
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