Обсуждение: web-app not working after upgrade 7.4 to 8.1
Hello experts,
I have recently upgraded my database from 7.4 to 8.1 and migrated all data.
In order to be able to use my web-app, I replaced the old jdbc.jar with
postgresql-8.1-407.jdbc3.jar in WEB-INF/lib/.
Restarted Tomcat (4.1.31) - and later even redeployed the webapp.
I keep getting no database connection - as if the postmaster were not
started.
Apparently I have ignored something basic - but no idea what to look at.
This is actually my first fully working webapp using Struts and Tomcat
on Linux - so maybe my problem is really a Tomcat issue.
I have attached part of my coding of the Struts-Action, the exception
occurs with the message "Presumably database is down."
Any hint is apreciated.
-----------------------------------
public ActionForward execute( ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response )
throws Exception
{
HttpSession sitzg = request.getSession();
ConnectionPool pool = (ConnectionPool) sitzg.getAttribute( JDBC );
if (pool == null)
{
try
{
pool = new ConnectionPool( driver, dburl, username, password,
initConn );
sitzg.setAttribute( JDBC, pool );
}
catch ( SQLException e )
{
System.out.println( e.getMessage() );
System.out.println( "Cannot connect to database " + database );
e.printStackTrace();
}
catch ( ClassNotFoundException e )
{
System.out.println( e.getMessage() );
System.out.println( "Falscher Treibername in den Properties: "
+ driver );
e.printStackTrace();
}
if (pool == null)
{
throw new SQLException( "ERROR: NULL pool created! Presumably
database is down." );
}
-----------------------------------
Regards,
Wolfgang Rinnert
wrinnert@web.de
Its possible that your upgrade missed up the postgres configuration.
Verifiy if the postgres is waiting for connections at port 5342.
As root try:
netstat -ntlp | grep 5432
You should see somenting like:
tcp 0 0 0.0.0.0:5432
0.0.0.0:* LISTEN 3668/postmaster
tcp 0 0 :::5432
:::* LISTEN 3668/postmaster
If not, postgres is not waiting for connections and you'll get the "no
database connection" error.
JP
Wolfgang Rinnert wrote:
> Hello experts,
>
> I have recently upgraded my database from 7.4 to 8.1 and migrated all
> data.
>
> In order to be able to use my web-app, I replaced the old jdbc.jar
> with postgresql-8.1-407.jdbc3.jar in WEB-INF/lib/.
>
> Restarted Tomcat (4.1.31) - and later even redeployed the webapp.
>
> I keep getting no database connection - as if the postmaster were not
> started.
>
> Apparently I have ignored something basic - but no idea what to look at.
> This is actually my first fully working webapp using Struts and Tomcat
> on Linux - so maybe my problem is really a Tomcat issue.
>
> I have attached part of my coding of the Struts-Action, the exception
> occurs with the message "Presumably database is down."
>
> Any hint is apreciated.
>
> -----------------------------------
>
>
> public ActionForward execute( ActionMapping mapping,
> ActionForm form,
> HttpServletRequest request,
> HttpServletResponse response )
> throws Exception
> {
> HttpSession sitzg = request.getSession();
> ConnectionPool pool = (ConnectionPool) sitzg.getAttribute( JDBC );
> if (pool == null)
> {
> try
> {
> pool = new ConnectionPool( driver, dburl, username, password,
> initConn );
> sitzg.setAttribute( JDBC, pool );
> }
> catch ( SQLException e )
> {
> System.out.println( e.getMessage() );
> System.out.println( "Cannot connect to database " + database );
> e.printStackTrace();
> }
> catch ( ClassNotFoundException e )
> {
> System.out.println( e.getMessage() );
> System.out.println( "Falscher Treibername in den Properties:
> " + driver );
> e.printStackTrace();
> }
> if (pool == null)
> {
> throw new SQLException( "ERROR: NULL pool created!
> Presumably database is down." );
> }
>
> -----------------------------------
>
> Regards,
>
> Wolfgang Rinnert
> wrinnert@web.de
>
> ---------------------------(end of broadcast)---------------------------
> TIP 9: In versions below 8.0, the planner will ignore your desire to
> choose an index scan if your joining column's datatypes do not
> match
>
--
João Paulo Ribeiro | Senior Software Engineer
jp@mobicomp.com
PHONE: + 351 253 305 250
FAX : + 351 253 305 250
www.mobicomp.com
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Hello Joao, João Paulo Ribeiro wrote: > Its possible that your upgrade missed up the postgres configuration. > Verifiy if the postgres is waiting for connections at port 5342. > As root try: > netstat -ntlp | grep 5432 > Thanks for your tip. I tried it - that is not the problem. What I am going to do, is write a minimal web application that connects to the database, and see if I can get to the core of the problem. Since this is a hobby and I have to do it in the evening besides professional work and family affairs, it will take me some time. Thanks anyways. Wolfgang ... > JP > > > Wolfgang Rinnert wrote: >> Hello experts, >> >> I have recently upgraded my database from 7.4 to 8.1 and migrated all >> data. >> >> In order to be able to use my web-app, I replaced the old jdbc.jar >> with postgresql-8.1-407.jdbc3.jar in WEB-INF/lib/. >> >> Restarted Tomcat (4.1.31) - and later even redeployed the webapp. >> >> I keep getting no database connection - as if the postmaster were not >> started. >> >>... >> Any hint is apreciated. >>
On 04/12/2006 18:46 Wolfgang Rinnert wrote: > Hello Joao, > > João Paulo Ribeiro wrote: >> Its possible that your upgrade missed up the postgres configuration. >> Verifiy if the postgres is waiting for connections at port 5342. >> As root try: >> netstat -ntlp | grep 5432 >> > Thanks for your tip. I tried it - that is not the problem. > > What I am going to do, is write a minimal web application that connects > to the database, and see if I can get to the core of the problem. > Since this is a hobby and I have to do it in the evening besides > professional work and family affairs, it will take me some time. > > Thanks anyways. > > Wolfgang pg_hba.conf? -- Paul Thomas +------------------------------+-------------------------------------------+ | Thomas Micro Systems Limited | Software Solutions for Business | | Computer Consultants | http://www.thomas-micro-systems-ltd.co.uk | +------------------------------+-------------------------------------------+