Обсуждение: JServ + PostgreSQL 6.3

Hello All,
I have JDK 1.1.6 and JServ 0.9.11 on Apache 1.3.3. I am able to get the
servlets to work but I am not able to get the servlets which access
the postgresql 6.3 JDBC to work correctly.

I get the following message in the JServ error file.

Exception creating server socket: java.net.BindException: Address already
in use
/usr/local/java/bin/../bin/checkVersions: /tmp/ldd.out.363: Permission denied
/usr/local/java/bin/../bin/checkVersions: /tmp/ldd.out.363: No such file or
directory

For your information, all users have been given complete read/write access
to the /tmp directory.

By the way, the servlet runs perfectly well when executed seperately and not
as a servlet albeit with the following error messages.

/usr/local/java/bin/../bin/checkVersions: /tmp/ldd.out.363: Permission denied
/usr/local/java/bin/../bin/checkVersions: /tmp/ldd.out.363: No such file or
directory

I have given below the parts from the httpd.conf file

httpd.conf
---------------------------------------------------------------
<IfModule mod_jserv.c>
ServletProperties /usr/local/java/jserv/servlet.properties
ServletBinary     /usr/local/java/bin/java
ServletClassPath
/usr/local/java/lib/classes.zip:/usr/local/java/jserv/servclas
ses.zip:/usr/local/java/jserv/classes
ServletEnvironment NS_JAVA true

#ServletClassPath  /usr/local/java/jserv/servclasses.zip
#ServletClassPath  /usr/local/java/jserv/src
ServletAlias      /servlets /usr/local/java/jserv/servlets
ServletErrorLog   /usr/local/java/jserv/jserv_errors.log
ServletAuthExport On
        AddHandler      jhtml-parser .jhtml
        Action          jhtml-parser
/usr/local/java/jserv/servlets/org.apache.j
serv.JServSSI
</IfModule>

Any ideas ? Any help will be greatly appreciated. Do I need to make
any specific changes in the servlet.properties file ?

Regards,
Prem

On Wed, 6 Jan 1999, Prem Kurian Philip wrote:

> Hello All,
> I have JDK 1.1.6 and JServ 0.9.11 on Apache 1.3.3. I am able to get the
> servlets to work but I am not able to get the servlets which access
> the postgresql 6.3 JDBC to work correctly.
>
> I get the following message in the JServ error file.
>
> Exception creating server socket: java.net.BindException: Address already
> in use
> /usr/local/java/bin/../bin/checkVersions: /tmp/ldd.out.363: Permission denied
> /usr/local/java/bin/../bin/checkVersions: /tmp/ldd.out.363: No such file or
> directory

I've got 1.1.6 installed on my linux box, and it doesn't have a
checkVersions file.

What platform are you running the JDK on?

Any how, /tmp/ldd.out.363 looks to me like a temporary file being
generated by a script using the ldd tool to test compiled binaries,
possibly by the JDK to make sure everything is ok before starting.

> For your information, all users have been given complete read/write access
> to the /tmp directory.

The first line would have indicated a permissions problem, but as you say,
you have given everyone full access to /tmp

> By the way, the servlet runs perfectly well when executed seperately and not
> as a servlet albeit with the following error messages.
>
> /usr/local/java/bin/../bin/checkVersions: /tmp/ldd.out.363: Permission denied
> /usr/local/java/bin/../bin/checkVersions: /tmp/ldd.out.363: No such file or
> directory

What happens if you run some other java code? If you wrote a simple "Hello
World" style program in Java, do you get the same thing?

> I have given below the parts from the httpd.conf file

I don't think it's here. I think it's something to do with either your JDK
or JServ installation.

> Any ideas ? Any help will be greatly appreciated. Do I need to make
> any specific changes in the servlet.properties file ?

Let me know. Other people have told me that the JDBC driver works fine
with servlets, and I haven't seen this problem before with the JDK on any
of the platforms I've used Java on.

--
       Peter T Mount peter@retep.org.uk
      Main Homepage: http://www.retep.org.uk
PostgreSQL JDBC Faq: http://www.retep.org.uk/postgres
 Java PDF Generator: http://www.retep.org.uk/pdf

Two thoughts.

The servlet code would help a fair bit in this instance.  I've got the identical
setup running quite successfully with multiple servlets on a Linux box.  So I
know there is a solution.

Second, the socket is locked either by another process, or another previous
instance of ther servlet running.  I think the /tmp file messages may be
secondary exception traps at higher levels, depending on the code.  ie: the
exception is dropping through, and/or being rethrown after the failed bind, or
the fail to bind triggers a cascade of errors in the coding assumptions
afterwards.

The checkVersions program isn't part of the 1.1.6 distribution, so I assume you
have a class loading at runtime or some such thing.  Again, the source would
help, but the path it references on the class would *not* be permitted to be
accessed by the servlet for loading from the .conf file you included from what I
understand the setup to be.  The binary is/is in /usr/local/java/bin/java, and
the classpath for loading is in the subs of jserv, or the standard lib
classes.zip.  How is checkVersion being called/implemented?

Like I say, I know the solution is there, but I need a bit more info to help you
get to it!  :-)

Cheers,

Dallas Hockley
hockleyd@cybersurf.net



Prem Kurian Philip wrote:

> Hello All,
> I have JDK 1.1.6 and JServ 0.9.11 on Apache 1.3.3. I am able to get the
> servlets to work but I am not able to get the servlets which access
> the postgresql 6.3 JDBC to work correctly.
>
> I get the following message in the JServ error file.
>
> Exception creating server socket: java.net.BindException: Address already
> in use
> /usr/local/java/bin/../bin/checkVersions: /tmp/ldd.out.363: Permission denied
> /usr/local/java/bin/../bin/checkVersions: /tmp/ldd.out.363: No such file or
> directory
>
> For your information, all users have been given complete read/write access
> to the /tmp directory.
>
> By the way, the servlet runs perfectly well when executed seperately and not
> as a servlet albeit with the following error messages.
>
> /usr/local/java/bin/../bin/checkVersions: /tmp/ldd.out.363: Permission denied
> /usr/local/java/bin/../bin/checkVersions: /tmp/ldd.out.363: No such file or
> directory
>
> I have given below the parts from the httpd.conf file
>
> httpd.conf
> ---------------------------------------------------------------
> <IfModule mod_jserv.c>
> ServletProperties /usr/local/java/jserv/servlet.properties
> ServletBinary     /usr/local/java/bin/java
> ServletClassPath
> /usr/local/java/lib/classes.zip:/usr/local/java/jserv/servclas
> ses.zip:/usr/local/java/jserv/classes
> ServletEnvironment NS_JAVA true
>
> #ServletClassPath  /usr/local/java/jserv/servclasses.zip
> #ServletClassPath  /usr/local/java/jserv/src
> ServletAlias      /servlets /usr/local/java/jserv/servlets
> ServletErrorLog   /usr/local/java/jserv/jserv_errors.log
> ServletAuthExport On
>         AddHandler      jhtml-parser .jhtml
>         Action          jhtml-parser
> /usr/local/java/jserv/servlets/org.apache.j
> serv.JServSSI
> </IfModule>
>
> Any ideas ? Any help will be greatly appreciated. Do I need to make
> any specific changes in the servlet.properties file ?
>
> Regards,
> Prem