I am currently testing a product by the name of dspace (http://www.dspace.org) and require installing java since dspace is completely java based. The problem is that during its installation it needs to talk to pgsql via jdbc and I am getting the error: Exception occurred:org.apache.commons.dbcp.DbcpException: java.sql.SQLException: Driver not found for URL: jdbcostgresql://dspace.library.dal.ca:5432/dspace org.apache.commons.dbcp.DbcpException: java.sql.SQLException: Driver not found for URL: jdbcostgresql://dspace.library.dal.ca:5432/dspace
I cannot ofcourse go beyond this since they have to talk to each other and if that doesnt happen nothing else is going to work. In terms of the system and the env var's; here goes:
I do realise that support from the developers from DSPACE should be available but it has not been so far. As long as I get JDBC to work with PGSQL, it would at the very least get me started.
Any help would be greatly appreciated.
Thanks.
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Ashwin Kutty 23 October 2003 16:20:42 [ permanent link ]
Hi all,
I sent this message to the jdbc list and received no response there and so am posting to this list hoping I could get some help here.
Thanks in advance.
---------- Forwarded message ---------- Date: Fri, 17 Oct 2003 11:54:19 -0300 (ADT) From: Ashwin Kutty <akutty@dal.ca> Reply-To: Ashwin Kutty <Ashwin.Kutty@Dal.Ca> To: pgsql-jdbc@postgresql.org Subject: Setting up DSPACE for Postgres access
I am currently testing a product by the name of dspace (http://www.dspace.org) and require installing java since dspace is completely java based. The problem is that during its installation it needs to talk to pgsql via jdbc and I am getting the error: Exception occurred:org.apache.commons.dbcp.DbcpException: java.sql.SQLException: Driver not found for URL: jdbcostgresql://dspace.library.dal.ca:5432/dspace org.apache.commons.dbcp.DbcpException: java.sql.SQLException: Driver not found for URL: jdbcostgresql://dspace.library.dal.ca:5432/dspace
I cannot ofcourse go beyond this since they have to talk to each other and if that doesnt happen nothing else is going to work. In terms of the system and the env var's; here goes:
Richard Huxton 23 October 2003 17:39:57 [ permanent link ]
On Thursday 23 October 2003 14:20, Ashwin Kutty wrote:>
I am currently testing a product by the name of dspace> (http://www.dspace.org) and require installing java since dspace is> completely java based. The problem is that during its installation it> needs to talk to pgsql via jdbc and I am getting the error:> Exception occurred:org.apache.commons.dbcp.DbcpException:> java.sql.SQLException: Driver not found for URL:> jdbcostgresql://dspace.library.dal.ca:5432/dspace> org.apache.commons.dbcp.DbcpException: java.sql.SQLException: Driver not> found for URL: jdbcostgresql://dspace.library.dal.ca:5432/dspace
It's complaining that it cannot find a driver. The obvious steps are: 1. Check you have your JDBC driver installed and configured. 2. Check you can connect using it. 3. Check it is in the relevant PATH How far along this process have you got?
If you've done all those, we'll have to figure out why it can't find the driver. -- Richard Huxton Archonet Ltd
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Ashwin Kutty 23 October 2003 17:52:29 [ permanent link ]
It's complaining that it cannot find a driver. The obvious steps are:> 1. Check you have your JDBC driver installed and configured.
Yes. I have done so. Included in the Classpath env var as well. I have gone so far as to downloading it from jdbc.postgresql.org rather than using the compiled one I have. Still no luck.
2. Check you can connect using it.
Via a test program? Done, no luck.. Same ol same ol..
3. Check it is in the relevant PATH
Besides the Classpath, does it need to be in the Path as well? If so, no I havent added it in, but will do so if its required.
How far along this process have you got?
I am actually to the point of pulling teeth, cause I have added every jar file I can think of and find in the classpath, re-installed everything and still the case remains the same. I am guessing its just not finding it due to some foolish little quirk I am missing some place. I even have tcp_ip turned on btw in postgres to accept connections both from the box itself and another machine through which I am using pgadmin and connecting fine.
If you've done all those, we'll have to figure out why it can't find the> driver.
I thought and still under the impression that its looking in the classpath for this and I have edited /etc/profile to include it, checked env before running the program and it according to it the jar file is included fine and the classpath does have it; but still nothing. Checked file permissions on the jar file and its fine as well. I have made changes to the user's bash_profile as well to see if its a user related issue and still nothing. Su'ed in as root and tried it out and yet nothing. Its like for some reason the file just cant be found.
Any ideas and assistance would be greatly appreciated.
Thanks.
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Dardo D Kleiner 23 October 2003 18:08:22 [ permanent link ]
Whenever I need to use the postgresql JDBC driver in my programs, I have to manually include the line:
Class.forName("org.postgresql.Driver");
somewhere *before* I call DriverManager.getConnection.
Try this in your test program and see if it works. Unfortunately, you may not be able to modify the installer to support this, but there might be another way?
HTH!
-- Dardo D. Kleiner Connection Machine Facility, Center for Computational Sciences Naval Research Laboratory (Washington, DC) dkleiner@cmf.nrl.navy.mil -- 202.404.7019
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Richard Huxton 23 October 2003 18:32:05 [ permanent link ]
On Thursday 23 October 2003 15:52, Ashwin Kutty wrote:>
I thought and still under the impression that its looking in the classpath> for this and I have edited /etc/profile to include it, checked env before> running the program and it according to it the jar file is included fine> and the classpath does have it; but still nothing. Checked file> permissions on the jar file and its fine as well. I have made changes to> the user's bash_profile as well to see if its a user related issue and> still nothing. Su'ed in as root and tried it out and yet nothing. Its> like for some reason the file just cant be found.
Looking at the dspace docs (system prerequisites): "Then when PostgreSQL has compiled, copy the new postgresql.jar to dspace-1.1/lib."
Strikes me as a bit strange it won't just use the classpath, but have you got the jar in there too?
-- Richard Huxton Archonet Ltd
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Ashwin Kutty 23 October 2003 20:07:15 [ permanent link ]
Agreed, however if its working fine on someone else's end then the problem is local to my environment. People do have difficulties setting up DSPACE but I currently have the front-end running fine. The dependencies are just crazy along with third party apps for DSPACE. However, all that is done, its working and the front-end is up. I have what most others dont and dont have what most others do. The jar part of it really gets me cause all it needs is the CLASSPATH env var pointing to the appropriate jar as I have done so many times in the past.
I know Java is on ok cause I have Tomcat running on the server fine as well which is required for DSPACE as well. I just dont get why the program cannot find the jar var. The create-administrator script runs the script such that the call tends to be: java -Xmx256m -classpath $FULLPATH "org.dspace.administer.CreateAdministrator"
Where, $FULLPATH=$CLASSPATHJARSDSPACEDIR/config Where $JARS=`echo $DSPACEDIR/lib/*.jar | sed 's/ /\:/g'`
Now, the postgresql.jar gets pointed to twice; once from the script with the JARS var and the second with the pointing to it from the $CLASSPATH var set by me. I even echo the $FULLPATH var right before it hits the java command and the echo brings up the huge PATH created by the script that contains the jar files and the directories. I dont get however how the script can have it in the $FULLPATH var but not use it when sent to the command line?
On Thu, 23 Oct 2003, Dardo D Kleiner wrote:
Whenever I need to use the postgresql JDBC driver in my programs, I> have to manually include the line:>
Class.forName("org.postgresql.Driver");>
somewhere *before* I call DriverManager.getConnection.>
Try this in your test program and see if it works. Unfortunately,> you may not be able to modify the installer to support this, but> there might be another way?>
HTH!>
--> Dardo D. Kleiner> Connection Machine Facility, Center for Computational Sciences> Naval Research Laboratory (Washington, DC)> dkleiner@cmf.nrl.navy.mil -- 202.404.7019>
--- "The difference between genius and stupidity is that genius has its limits." - Albert Einstein
Ashwin kutty.. Systems Administrator Dalhousie University Libraries (902) 494-2694
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Richard Huxton 23 October 2003 20:52:46 [ permanent link ]
On Thursday 23 October 2003 18:07, Ashwin Kutty wrote:>
Now, the postgresql.jar gets pointed to twice; once from the script with> the JARS var and the second with the pointing to it from the $CLASSPATH> var set by me. I even echo the $FULLPATH var right before it hits the> java command and the echo brings up the huge PATH created by the script> that contains the jar files and the directories. I dont get however how> the script can have it in the $FULLPATH var but not use it when sent to> the command line?
Given everything else you've tried, I think you might be on the right track here and somehow your environment variables are getting clobbered. How or why I couldn't say (I'd suspect Tomcat, but you say you can't even run the create-administator app).
The only other thing I can think of is that for some reason it's looking for the wrong class. If dspace comes with the source, it might be worth checking whether there isn't a mistake in the Class.forname() call.
I must admit, I don't know much java - can you use "strace" to track system calls, or is there a similar utility that would let you see what files it is searching for? -- Richard Huxton Archonet Ltd
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Andrew Rawnsley 24 October 2003 07:41:46 [ permanent link ]
Have you tried placing the jars in the $JAVA_HOME/jre/lib/ext directory? Jars there are automatically searched by the JVM.
On Thursday, October 23, 2003, at 01:52 PM, Richard Huxton wrote:
On Thursday 23 October 2003 18:07, Ashwin Kutty wrote:>>
Now, the postgresql.jar gets pointed to twice; once from the script >> with>> the JARS var and the second with the pointing to it from the >> $CLASSPATH>> var set by me. I even echo the $FULLPATH var right before it hits the>> java command and the echo brings up the huge PATH created by the >> script>> that contains the jar files and the directories. I dont get however >> how>> the script can have it in the $FULLPATH var but not use it when sent >> to>> the command line?>
Given everything else you've tried, I think you might be on the right > track> here and somehow your environment variables are getting clobbered. How > or why> I couldn't say (I'd suspect Tomcat, but you say you can't even run the> create-administator app).>
The only other thing I can think of is that for some reason it's > looking for> the wrong class. If dspace comes with the source, it might be worth > checking> whether there isn't a mistake in the Class.forname() call.>
I must admit, I don't know much java - can you use "strace" to track > system> calls, or is there a similar utility that would let you see what files > it is> searching for?> -- > Richard Huxton> Archonet Ltd>
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Andrew Rawnsley President The Ravensfield Digital Resource Group, Ltd. (740) 587-0114 www.ravensfield.com
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Ashwin Kutty 24 October 2003 22:09:32 [ permanent link ]
Given everything else you've tried, I think you might be on the right track> here and somehow your environment variables are getting clobbered. How or why> I couldn't say (I'd suspect Tomcat, but you say you can't even run the> create-administator app).
Tomcat only uses the minor few and runs like a charm. It doesnt seem to be only the create-administrator app. As I mentioned earlier, this occurs with any app trying to connect to pgsql via jdbc. I used the psql.java file to compile and test that comes bundled in the postgres source. The error I received was as follows:
Exception in thread "main" java.lang.NoClassDefFoundError: loaded class psql was in fact named example.psql at 0x40268e17: java.lang.Throwable.Throwable(java.lang.String) (/usr/lib/./libgcj.so.3) at 0x4025bc8e: java.lang.Error.Error(java.lang.String) (/usr/lib/./libgcj.so.3) at 0x4025d6b6: java.lang.LinkageError.LinkageError(java.lang.String) (/usr/lib/./libgcj.so.3) at 0x4025eb36: java.lang.NoClassDefFoundError.NoClassDefFoundError(java.lang.String) (/usr/lib/./libgcj.so.3) at 0x4022d555: ?? (??:0) at 0x4022c96e: _Jv_ClassReader.handleClassBegin(int, int, int) (/usr/lib/./libgcj.so.3) at 0x4022ab61: _Jv_ClassReader.parse() (/usr/lib/./libgcj.so.3) at 0x4022a97f: _Jv_DefineClass(java.lang.Class, byte[], int, int) (/usr/lib/./libgcj.so.3) at 0x40247e6f: java.lang.ClassLoader.defineClass0(java.lang.String, byte[], int, int, java.security.ProtectionDomain) (/usr/lib/./libgcj.so.3) at 0x4025aaa3: java.lang.ClassLoader.defineClass(java.lang.String, byte[], int, int, java.security.ProtectionDomain) (/usr/lib/./libgcj.so.3) at 0x4025aa13: java.lang.ClassLoader.defineClass(java.lang.String, byte[], int, int) (/usr/lib/./libgcj.so.3) at 0x402f1f2e: java.net.URLClassLoader.findClass(java.lang.String) (/usr/lib/./libgcj.so.3) at 0x40248197: gnu.gcj.runtime.VMClassLoader.findClass(java.lang.String) (/usr/lib/./libgcj.so.3) at 0x4025a904: java.lang.ClassLoader.loadClass(java.lang.String, boolean) (/usr/lib/./libgcj.so.3) at 0x402488d9: _Jv_FindClass(_Jv_Utf8Const, java.lang.ClassLoader) (/usr/lib/./libgcj.so.3) at 0x40244cdd: java.lang.Class.forName(java.lang.String, boolean, java.lang.ClassLoader) (/usr/lib/./libgcj.so.3) at 0x40244d9f: java.lang.Class.forName(java.lang.String) (/usr/lib/./libgcj.so.3) at 0x402ad01d: gnu.gcj.runtime.FirstThread.run() (/usr/lib/./libgcj.so.3) at 0x4024fc4c: _Jv_ThreadRun(java.lang.Thread) (/usr/lib/./libgcj.so.3) at 0x4021c8ac: _Jv_RunMain(java.lang.Class, byte const, int, byte const, boolean) (/usr/lib/./libgcj.so.3) at 0x08048910: ?? (??:0) at 0x420156a4: __libc_start_main (/lib/tls/libc.so.6) at 0x080486c1: ?? (??:0)
The only other thing I can think of is that for some reason it's looking for> the wrong class. If dspace comes with the source, it might be worth checking> whether there isn't a mistake in the Class.forname() call.
Put it this way, the build works for the rest and after some testing found that outside of create-admin I cant connect to it.
I must admit, I don't know much java - can you use "strace" to track system> calls, or is there a similar utility that would let you see what files it is> searching for?
strace revealed nothing really that could explain this behaviour.
Thanks a lot for all the assistance btw, I really appreciate it.
Hope you have some more ideas to help out.
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I want to Install D-Space using a platform named Xampp. Xampp has the apache server and uses a Java Compiler. But can i use Xampp's MySQL instead of postgre or Oracle?
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