java.net.SocketException: Network is unreachable

Hello
list,
                                                      
since I switched from a AMD Athlon based 32bit single core machine to a
64bit quad-core, a cannot run my Postgresql Java
programs.
I do everything using Debian testing. The new machine was installed from
scratch.
Here is the output of "uname
-a":
                               
Linux pcwolfgang 2.6.30-2-amd64 #1 SMP Mon Dec 7 05:21:45 UTC 2009
x86_64
GNU/Linux

                                                            
I migrated using pg_dump / psql -i without
problems.
                 
On the old machine I had postgresql 8.3, now I have 8.4. Details
below.
The old jdbc driver was called postgresql-8.3-603.jdbc4.jar, currently I
have
postgresql-8.4-701.jdbc4.jar.

                                                            
I can see and modify my data through psql (through socket as well as
tcp/ip
access).
But running a java program gives me an exception
crash.
           

                                                            
Now for the details.  I have put the statements between lines of equal
signs, their output directly
following.
================================================================
                                                            
postgres@pcwolfgang:/root
$ /usr/lib/postgresql/8.4/bin/pg_controldata
                                   
================================================================
                                                            
pg_control-Versionsnummer:
843
                  
Katalogversionsnummer:
200904091
                  
Datenbanksystemidentifikation:
5420760379678260442
                  
Datenbank-Cluster-Status:                 im
Produktionsmodus
               
pg_control zuletzt geändert:              Mo 25 Jan 2010 18:04:48
CET
Position des letzten Checkpoints:
0/9B91F8
                  
Position des vorletzten Checkpoints:
0/9B91B0
                  
REDO-Position des letzten Checkpoints:
0/9B91F8
                  
TimeLineID des letzten Checkpoints:
1
                  
NextXID des letzten Checkpoints:
0/17583
                  
NextOID des letzten Checkpoints:
16545
                  
NextMultiXactId des letzten Checkpoints:
1
                  
NextMultiOffset des letzten Checkpoints:
0
                  
Zeit des letzten Checkpoints:             So 24 Jan 2010 23:35:16
CET
Minimaler Wiederherstellungsendpunkt:
0/0
                  
Maximale Datenausrichtung (Alignment):
8
                  
Datenbankblockgröße:
8192
                  
Blöcke pro Segment:
131072
                  
WAL-Blockgröße:
8192
                  
Bytes pro WAL-Segment:
16777216
                  
Maximale Bezeichnerlänge:
64
                  
Maximale Spalten in einem Index:
32
                  
Maximale Größe eines Stücks TOAST:
1996
                  
Speicherung von Datum/Zeit-Typen:
64-Bit-Ganzzahlen
                  
Übergabe von Float4-Argumenten:
Wert
                  
Übergabe von Float8-Argumenten:
Wert
                  

================================================================
wolfgang@pcwolfgang:~$ pg_lsclusters
================================================================
Version Cluster   Port Status Owner    Data directory
Log file
8.4     main      5432 online
postgres /var/lib/postgresql/8.4/main       /var/log/postgresql/postgresql-8.4-main.log

================================================================
postgres@pcwolfgang:/root$ ps aux | grep -i post
================================================================
postgres  2115  0.0  0.3 102320  6428 ?        S    18:04
0:01 /usr/lib/postgresql/8.4/bin/postgres
-D /var/lib/postgresql/8.4/main -c
config_file=/etc/postgresql/8.4/main/postgresql.conf
                                                                                               
postgres  2120  0.0  0.0 102320  1688 ?        Ss   18:04   0:00
postgres: writer
process
postgres  2121  0.0  0.0 102320  1484 ?        Ss   18:04   0:00
postgres: wal writer
process
postgres  2122  0.0  0.1 102600  1920 ?        Ss   18:04   0:00
postgres: autovacuum launcher
process
postgres  2123  0.0  0.0  74012  1588 ?        Ss   18:04   0:00
postgres: stats collector
process
postgres  3731  0.0  0.0  49356  1568 pts/0    S    18:34   0:00 su
postgres
postgres  3739  0.0  0.1  18964  1932 pts/0    S    18:34   0:00
bash
postgres  3748  0.0  0.0  16072  1116 pts/0    R+   18:35   0:00 ps
aux
postgres  3749  0.0  0.0   9348   936 pts/0    R+   18:35   0:00 grep -i
post

This is the call to a little example java program. Its code follows
below.
Translation of the phrase in German "Der Verbindungsversuch schlug
fehl." would be "The connection attempt failed."
================================================================
wolfgang@pcwolfgang:~/programming/java/lotto$ java
jdbc_002_driverinfo
================================================================
18:13:26.852 (1) PostgreSQL 8.4 JDBC4 (build
701)
18:13:26.878 (1) Trying to establish a protocol version 3 connection to
127.0.0.1:5432
org.postgresql.util.PSQLException: Der Verbindungsversuch schlug
fehl.
        at
org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:150)
        at
org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:66)
        at
org.postgresql.jdbc2.AbstractJdbc2Connection.<init>(AbstractJdbc2Connection.java:125)
        at
org.postgresql.jdbc3.AbstractJdbc3Connection.<init>(AbstractJdbc3Connection.java:30)
        at
org.postgresql.jdbc3g.AbstractJdbc3gConnection.<init>(AbstractJdbc3gConnection.java:22)

                                                                                                    
        at
org.postgresql.jdbc4.AbstractJdbc4Connection.<init>(AbstractJdbc4Connection.java:30)

                                                                                                    
        at
org.postgresql.jdbc4.Jdbc4Connection.<init>(Jdbc4Connection.java:24)

                                                                                                    
        at
org.postgresql.Driver.makeConnection(Driver.java:393)

                                                                                                    
        at org.postgresql.Driver.access
$100(Driver.java:47)

                                                                        
        at org.postgresql.Driver
$ConnectThread.run(Driver.java:308)
                        
        at
java.lang.Thread.run(Thread.java:619)
                                             
SQLException:
SQLState(08001)
                                          
getConnection failed: org.postgresql.util.PSQLException: Der
Verbindungsversuch schlug
fehl.
Exception in thread "main" org.postgresql.util.PSQLException: Der
Verbindungsversuch schlug
fehl.
        at org.postgresql.Driver
$ConnectThread.getResult(Driver.java:348)
                        
        at
org.postgresql.Driver.connect(Driver.java:271)
                                             
        at
java.sql.DriverManager.getConnection(DriverManager.java:582)
                                             
        at
java.sql.DriverManager.getConnection(DriverManager.java:154)
                                             
        at
jdbc_002_driverinfo.main(jdbc_002_driverinfo.java:19)
                                             
Caused by: java.net.SocketException: Network is
unreachable
        
        at java.net.PlainSocketImpl.socketConnect(Native
Method)
        at
java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
                                             
        at
java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
                                             
        at
java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
                                             
        at
java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
                                             
        at
java.net.Socket.connect(Socket.java:525)
                                             
        at
java.net.Socket.connect(Socket.java:475)
                                             
        at
java.net.Socket.<init>(Socket.java:372)
                                             
        at
java.net.Socket.<init>(Socket.java:186)
                                             
        at
org.postgresql.core.PGStream.<init>(PGStream.java:62)
                                             
        at
org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:76)
                                             
        at
org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:66)
                                             
        at
org.postgresql.jdbc2.AbstractJdbc2Connection.<init>(AbstractJdbc2Connection.java:125)
                                             
        at
org.postgresql.jdbc3.AbstractJdbc3Connection.<init>(AbstractJdbc3Connection.java:30)
                                             
        at
org.postgresql.jdbc3g.AbstractJdbc3gConnection.<init>(AbstractJdbc3gConnection.java:22)
                                             
        at
org.postgresql.jdbc4.AbstractJdbc4Connection.<init>(AbstractJdbc4Connection.java:30)
                                             
        at
org.postgresql.jdbc4.Jdbc4Connection.<init>(Jdbc4Connection.java:24)
                                             
        at
org.postgresql.Driver.makeConnection(Driver.java:393)
                                             
        at org.postgresql.Driver.access
$100(Driver.java:47)
                 
        at org.postgresql.Driver
$ConnectThread.run(Driver.java:308)
                        
        at
java.lang.Thread.run(Thread.java:619)
                                             


This is my little example java program. I have tried all commented-out
versions you will see in the code.
One astounding thing is that I get the same exceptions thrown when
postmaster is not running.
To me it seems that the jdbc driver does not see the database *at
all*.
How this can be, is a complete mystery to
me.
My setup, which did not do any harm on the previous environment, may be
flawed.
But one way or the other, I do not know how to
proceed.
================================================================
wolfgang@pcwolfgang:~/programming/java/lotto$ cat
jdbc_002_driverinfo.java
================================================================
import
java.sql.*;
import
java.util.*;
public class
jdbc_002_driverinfo
{
  public static void main( String args[] ) throws
Exception

{

Class.forName( "org.postgresql.Driver" );
    //Connection conn =
DriverManager.getConnection( "jdbc:postgresql:lotto", "wolfgang",
"null" );
    //Connection conn =
DriverManager.getConnection( "jdbc:postgresql://127.0.0.1:5432/lotto",
"wolfgang", "" );
    //String url = "jdbc:postgresql://localhost:5432/lotto";
    String url = "jdbc:postgresql://127.0.0.1:5432/lotto";
    Properties props = new Properties();
    props.setProperty("user","wolfgang");
    props.setProperty("password","");
    props.setProperty("loglevel","2");
    props.setProperty("socketTimeout","10");
    props.setProperty("loginTimeout","10");
    props.setProperty("tcpKeepAlive","true");
    Connection conn = DriverManager.getConnection(url, props);
    DatabaseMetaData meta = conn.getMetaData();
    System.out.println( "Produkt: " + meta.getDatabaseProductName() );
    System.out.println( "Version: " +
meta.getDatabaseProductVersion()  );
    System.out.println( "Anzahl erlaubter Verbindungen: " +
meta.getMaxConnections() );
    System.out.println( "Version des DB-Treibers      : " +
meta.getDriverVersion() );
    System.out.println( "Update im Batchbetrieb       : " +
meta.supportsBatchUpdates() );
    System.out.println( "Gespeicherte Prozeduren      : " +
meta.supportsStoredProcedures() );
    conn.close ();
  }
}

Last, here is the extract of my postgresql configuration. Pretty much
standard.
================================================================
pcwolfgang:~# grep ^[[:alpha:]] /etc/postgresql/8.4/main/postgresql.conf
| cut -d"#" -f 1
================================================================
data_directory = '/var/lib/postgresql/8.4/main'
hba_file = '/etc/postgresql/8.4/main/pg_hba.conf'
ident_file = '/etc/postgresql/8.4/main/pg_ident.conf'
external_pid_file = '/var/run/postgresql/8.4-main.pid'
listen_addresses = 'localhost, 127.0.0.1'
port = 5432
max_connections = 100
unix_socket_directory = '/var/run/postgresql'
ssl = false
shared_buffers = 24MB
syslog_facility = 'LOCAL0'
syslog_ident = 'postgres'
client_min_messages = log
log_min_messages = info
log_min_error_statement = info
log_line_prefix = '%t '
datestyle = 'iso, dmy'
lc_messages = 'de_DE.UTF-8'
lc_monetary = 'de_DE.UTF-8'
lc_numeric = 'de_DE.UTF-8'
lc_time = 'de_DE.UTF-8'
default_text_search_config = 'pg_catalog.german'

The database and all clients accessing it are strictly local.
So, basically I have no access restrictions.
================================================================
pcwolfgang:~# grep -v ^$ /etc/postgresql/8.4/main/pg_hba.conf | grep -v
^#
================================================================
local   postgres        postgres        trust
local   all     postgres        ident
local   all     wolfgang        trust
host    all     wolfgang        127.0.0.1/32    trust
host    all     wolfgang        ::1/128         trust

Any help is very much appreciated.

Regards,
Wolfgang Rinnert