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From Eddie Bush <>
Subject Re: Null Pointer Exception - would you please take a look?
Date Tue, 18 Jun 2002 21:30:19 GMT
Yeah - it works fine except when I use it in this context.   The double //
after the host is a ... well it's like this: =)


... and because my path starts with a /, I have two of them - works super on
everything else.  I run on RHL 7.2 =)  The first one is a delimiter - the
second is necessary to indicate the path.  ... at least that's how I've
always done it.  I read it somewhere I think, but I couldn't tell you where.

I just downloaded Firebird - and upon looking at the docs I think I quite
like it.  I'm in the process of uninstalling interclient, as it wasn't an
RPM install - so I guess I get to do that part by hand =)  Ignacio tells me
I won't need interserver anymore, so ... I want to be sure everything is as
'tight' (security-wise and file-system-wise) as it can be.  I abhor needless
clutter floating around ... unless it's in my personal directory ;) lol

>From the looks/sound of things, I can either use the driver approach or I
have the option of binding a datasource into JNDI - InterBase didn't offer
that, so it's a step ahead, I think.  I figure the JDBCRealm will use the
driver approach (since the only JNDI lookup supported by TC is currently
LDAP), and then I can just have my initialization servlet bind a reference
to the appropriate POOLING datasource (I liked that part =) provided by
Firebird into JNDI and have the rest of my app get it from there.  I wish
the TC guys would let you configure a pool for the JDBCRealm.  I know ... I
know ... it's in the works.  That'll be really nice!

Thanks for your comments - I'm not sure where I'm going to turn for sure at
this point.  In the end I'll either wind up using TC stand-alone or using
mod_jk instead of mod_webapp.  I'll cross that bridge later ;)

Thanks =)


----- Original Message -----
From: "Rick Fincher" <>
To: "Tomcat Users List" <>
Sent: Tuesday, June 18, 2002 4:04 PM
Subject: Re: Null Pointer Exception - would you please take a look?

> Hi Eddie,
> I use Interbasse to do what you are trying, but directly to Tomcat, so I
> know it can be done.  My server.xml entry follows.  The only thing I see
> different is that you have two forward slashes after the host name.  Is
> a typo?  Does this work with your other JDBC apps?  I'm accessing a
> on a Solaris system so Windows would be a little different.  The error
> message you are getting is from the Interbase driver so Tomcat IS finding
> interclient.jar.  It is basically saying that it is getting a bad filename
> The only other thing I can think of with Interbase is that you have to be
> sure that "file.gdb" has granted read authorization to "username" on your
> "member" table.
> <Realm className="org.apache.catalina.realm.JDBCRealm" debug="0"
> driverName="interbase.interclient.Driver"
> gdb"
> connectionName="username"
> connectionPassword="password"
> userTable="USERS"
> userNameCol="USER_NAME"
> userCredCol="USER_PASS"
> userRoleTable="USER_ROLES"
> roleNameCol="ROLE_NAME" />
> Rick

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