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org.postgresql.util.PSQLException: Połączenie odmówiono

2013-05-22 8 views
5

Chciałem przetestować wykonanie funkcji indeksowania z innego hosta, ponieważ ta funkcja nie była absolutnie poprawnie spełniona w hasoop do programu. Ale miałem problemy z połączeniem z bazą danych z innego hosta, jak to wyjaśniono poniżej. Nie rozumiem, w czym problem.org.postgresql.util.PSQLException: Połączenie odmówiono

Napisałem następujący program java

import java.io.*; 
import java.util.*; 
import java.sql.Connection; 
import java.sql.DriverManager; 
import java.sql.ResultSet; 
import java.sql.SQLException; 
import java.sql.Statement; 
import java.util.logging.Level; 
import java.util.*; 

public class Sample { 
    public static void main (String[] args) throws IOException { 
        int CountComputers; 
      FileInputStream fstream = new FileInputStream(
        "/export/hadoop-1.0.1/bin/countcomputers.txt"); 
      BufferedReader br = new BufferedReader(new InputStreamReader(fstream)); 
      String result=br.readLine(); 
      CountComputers=Integer.parseInt(result); 
      input.close(); 
      fstream.close(); 
      Connection con = null; 
      Statement st = null; 
       ResultSet rs = null;  
       String url = "jdbc:postgresql://192.168.1.8:5432/NexentaSearch"; 
       String user = "postgres"; 
       String password = "valter89"; 
      //Class.forName("org.postgresql.Driver"); 
      ArrayList<String> paths = new ArrayList<String>(); 
      try 
      { 
       Class.forName("org.postgresql.Driver"); 
       con = DriverManager.getConnection(url, user, password); 
         st = con.createStatement(); 
         rs = st.executeQuery("select path from tasks order by id"); 
       while (rs.next()) { paths.add(rs.getString(1)); }; 
       PrintWriter zzz = null; 
        try 
        { 
          zzz = new PrintWriter(new FileOutputStream("/export/hadoop-1.0.1/bin/readwaysfromdatabase.txt")); 
        } 
        catch(FileNotFoundException e) 
        { 
          System.out.println("Error"); 
          System.exit(0); 
        } 
        for (int i=0; i<paths.size(); i++) 
       { 
        zzz.println("paths[i]=" + paths.get(i) + "\n"); 
        } 
        zzz.close(); 

      } 
      catch (SQLException e) 
      { 
       System.out.println("Connection Failed! Check output console"); 
       e.printStackTrace(); 
      } 
      catch (ClassNotFoundException e) 
      { 
       e.printStackTrace(); 
      } 
     } 
}

uruchomiłem Sample.jar za pomocą polecenia

./java -jar -Djava.library.path=/opt/jdk1.7.0_06/lib /Samplejavaprogram/Sample.jar

iw rezultacie otrzymałem następujące komunikaty

Connection Failed! Check output console 
org.postgresql.util.PSQLException: Connection refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections. 
    at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:136) 
    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.jdbc3.Jdbc3Connection.<init>(Jdbc3Connection.java:24) 
    at org.postgresql.Driver.makeConnection(Driver.java:393) 
    at org.postgresql.Driver.connect(Driver.java:267) 
    at java.sql.DriverManager.getConnection(DriverManager.java:579) 
    at java.sql.DriverManager.getConnection(DriverManager.java:221) 
    at Sample.main(Sample.java:33) 
Caused by: java.net.ConnectException: Connection timed out 
    at java.net.PlainSocketImpl.socketConnect(Native Method) 
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339) 
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200) 
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182) 
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:391) 
    at java.net.Socket.connect(Socket.java:579) 
    at java.net.Socket.connect(Socket.java:528) 
    at java.net.Socket.<init>(Socket.java:425) 
    at java.net.Socket.<init>(Socket.java:208) 
    at org.postgresql.core.PGStream.<init>(PGStream.java:62) 
    at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:76) 
    ... 9 more

Uruchomiłem plik z hosta o adresie 192.168.1.10. Pomóż wyeliminować błąd. W jakiej przyczynie błędu? Co trzeba zrobić?

netstat -a 


UDP: IPv4 
    Local Address  Remote Address  State 
-------------------- -------------------- ---------- 
     *.bootpc       Idle 
     *.dhcpv6-client      Idle 
     *.*         Unbound 
     *.*         Unbound 
     *.sunrpc       Idle 
     *.*         Unbound 
     *.38606        Idle 
     *.sunrpc       Idle 
     *.*         Unbound 
     *.40712        Idle 
     *.*         Unbound 
     *.*         Unbound 
     *.*         Unbound 
     *.54122        Idle 
     *.41742        Idle 
     *.*         Unbound 
     *.lockd        Idle 
     *.lockd        Idle 
     *.59670        Idle 
     *.42840        Idle 
     *.43065        Idle 
     *.39546        Idle 
     *.34243        Idle 
     *.35383        Idle 
     *.40746        Idle 
     *.40832        Idle 
192.168.1.2.bootpc      Idle 
     *.mdns        Idle 
     *.mdns        Idle 
192.168.1.2.ntp       Idle 
     *.snmpd        Idle 
     *.ntp        Idle 
     *.ntp        Idle 
localhost.localdomain.ntp      Idle 
myhost2.ntp        Idle 

UDP: IPv6 
    Local Address      Remote Address     State  If 
--------------------------------- --------------------------------- ---------- ----- 
     *.dhcpv6-client            Idle  
     *.*               Unbound  
localhost.44111     localhost.44111     Connected 
     *.sunrpc              Idle  
     *.*               Unbound  
     *.38606              Idle  
     *.54122              Idle  
     *.*               Unbound  
     *.lockd              Idle  
     *.42840              Idle  
     *.39546              Idle  
     *.35383              Idle  
     *.40832              Idle  
     *.ntp               Idle  
localhost.ntp              Idle  

TCP: IPv4 
    Local Address  Remote Address Swind Send-Q Rwind Recv-Q State 
-------------------- -------------------- ----- ------ ----- ------ ----------- 
localhost.localdomain.4999  *.*    0  0 128000  0 LISTEN 
     *.2001    *.*    0  0 128000  0 LISTEN 
     *.2002    *.*    0  0 128000  0 LISTEN 
     *.2003    *.*    0  0 128000  0 LISTEN 
     *.16049    *.*    0  0 128000  0 LISTEN 
     *.5432    *.*    0  0 128000  0 LISTEN 
     *.sunrpc    *.*    0  0 128000  0 LISTEN 
     *.*     *.*    0  0 128000  0 IDLE 
     *.sunrpc    *.*    0  0 128000  0 LISTEN 
     *.*     *.*    0  0 128000  0 IDLE 
     *.54002    *.*    0  0 128000  0 LISTEN 
     *.49023    *.*    0  0 128000  0 LISTEN 
     *.55493    *.*    0  0 1049200  0 LISTEN 
     *.46659    *.*    0  0 1048952  0 LISTEN 
     *.lockd    *.*    0  0 1049200  0 LISTEN 
     *.lockd    *.*    0  0 1048952  0 LISTEN 
     *.45361    *.*    0  0 128000  0 LISTEN 
localhost.localdomain.36084 localhost.localdomain.2001 65440  0 139264  0 ESTABLISHED 
     *.53943    *.*    0  0 128000  0 LISTEN 
localhost.localdomain.2001 localhost.localdomain.36084 139060  0 130880  0 ESTABLISHED 
localhost.localdomain.44644 localhost.localdomain.2012 34765  0 139264  0 ESTABLISHED 
localhost.localdomain.2012 localhost.localdomain.44644 139060  0 139060  0 ESTABLISHED 
     *.36068    *.*    0  0 128000  0 LISTEN 
     *.57055    *.*    0  0 128000  0 LISTEN 
     *.login    *.*    0  0 128000  0 LISTEN 
     *.finger    *.*    0  0 128000  0 LISTEN 
     *.telnet    *.*    0  0 128000  0 LISTEN 
     *.shell    *.*    0  0 128000  0 LISTEN 
     *.40524    *.*    0  0 128000  0 LISTEN 
     *.60838    *.*    0  0 128000  0 LISTEN 
     *.47648    *.*    0  0 128000  0 LISTEN 
     *.56894    *.*    0  0 128000  0 LISTEN 
     *.48461    *.*    0  0 128000  0 LISTEN 
     *.53672    *.*    0  0 128000  0 LISTEN 
     *.42108    *.*    0  0 128000  0 LISTEN 
     *.63720    *.*    0  0 128000  0 LISTEN 
     *.ssh    *.*    0  0 128000  0 LISTEN 
localhost.localdomain.smtp  *.*    0  0 128000  0 LISTEN 
localhost.localdomain.submission  *.*    0  0 128000  0 LISTEN 
     *.80     *.*    0  0 128000  0 LISTEN 
     *.*     *.*    0  0 128000  0 IDLE 
     *.2000    *.*    0  0 128000  0 LISTEN 
     *.*     *.*    0  0 128000  0 IDLE 
     *.443    *.*    0  0 128000  0 LISTEN 
     *.*     *.*    0  0 128000  0 IDLE 
localhost.localdomain.38137 localhost.localdomain.2003 65440  0 139264  0 ESTABLISHED 
localhost.localdomain.2003 localhost.localdomain.38137 139060  0 130880  0 ESTABLISHED 
localhost.localdomain.63918 localhost.localdomain.2001 65440  0 139264  0 ESTABLISHED 
localhost.localdomain.2001 localhost.localdomain.63918 139060  0 130880  0 ESTABLISHED 
myhost2.ssh   192.168.1.4.7431  65548  0 128480  0 ESTABLISHED 
localhost.localdomain.34057 localhost.localdomain.2001 65440  0 139264  0 ESTABLISHED 
localhost.localdomain.2001 localhost.localdomain.34057 139060  0 130880  0 ESTABLISHED 
localhost.localdomain.37015 localhost.localdomain.2001 65440  0 139264  0 ESTABLISHED 
localhost.localdomain.2001 localhost.localdomain.37015 139060  0 130880  0 ESTABLISHED 
     *.2011    *.*    0  0 131072  0 LISTEN 
localhost.localdomain.36598 localhost.localdomain.2002 65440  0 139264  0 ESTABLISHED 
localhost.localdomain.2002 localhost.localdomain.36598 139060  0 130880  0 ESTABLISHED 
localhost.localdomain.4000  *.*    0  0 131072  0 LISTEN 
localhost.localdomain.53161 localhost.localdomain.2011 34765  0 139264  0 ESTABLISHED 
localhost.localdomain.2011 localhost.localdomain.53161 139060  0 139060  0 ESTABLISHED 
localhost.localdomain.43878 localhost.localdomain.2001 65440  0 139264  0 ESTABLISHED 
localhost.localdomain.2001 localhost.localdomain.43878 139060  0 130880  0 ESTABLISHED 
localhost.localdomain.50976 localhost.localdomain.2001 65440  0 139264  0 ESTABLISHED 
localhost.localdomain.2001 localhost.localdomain.50976 139060  0 130880  0 ESTABLISHED 
localhost.localdomain.62633 localhost.localdomain.2012 34765  0 139264  0 ESTABLISHED 
localhost.localdomain.2012 localhost.localdomain.62633 139060  0 139060  0 ESTABLISHED 
     *.2012    *.*    0  0 131072  0 LISTEN 
localhost.localdomain.34418 localhost.localdomain.2012 34765  0 139264  0 ESTABLISHED 
localhost.localdomain.2012 localhost.localdomain.34418 139060  0 139060  0 ESTABLISHED 
localhost.localdomain.34356 localhost.localdomain.2011 34765  0 139264  0 ESTABLISHED 
localhost.localdomain.2011 localhost.localdomain.34356 139060  0 139060  0 ESTABLISHED 
localhost.localdomain.62884 localhost.localdomain.2001 65440  0 139264  0 ESTABLISHED 
localhost.localdomain.2001 localhost.localdomain.62884 139060  0 130880  0 ESTABLISHED 
localhost.localdomain.52603 localhost.localdomain.2011 34765  0 139264  0 ESTABLISHED 
localhost.localdomain.2011 localhost.localdomain.52603 139060  0 139060  0 ESTABLISHED 
localhost.localdomain.35345 localhost.localdomain.2001 65440  0 139264  0 ESTABLISHED 
localhost.localdomain.2001 localhost.localdomain.35345 139060  0 130880  0 ESTABLISHED 
localhost.localdomain.49022 localhost.localdomain.2001 130880  0 139264  0 TIME_WAIT 
localhost.localdomain.42797 localhost.localdomain.2001 130880  0 139264  0 TIME_WAIT 
localhost.localdomain.46312 localhost.localdomain.2001 130880  0 139264  0 TIME_WAIT 

TCP: IPv6 
    Local Address      Remote Address     Swind Send-Q Rwind Recv-Q State  If 
--------------------------------- --------------------------------- ----- ------ ----- ------ ----------- ----- 
     *.5432       *.*        0  0 128000  0 LISTEN  
     *.sunrpc       *.*        0  0 128000  0 LISTEN  
     *.*        *.*        0  0 128000  0 IDLE   
     *.54002       *.*        0  0 128000  0 LISTEN  
     *.55493       *.*        0  0 1049200  0 LISTEN  
     *.lockd       *.*        0  0 1049200  0 LISTEN  
     *.53943       *.*        0  0 128000  0 LISTEN  
     *.57055       *.*        0  0 128000  0 LISTEN  
     *.login       *.*        0  0 128000  0 LISTEN  
     *.finger       *.*        0  0 128000  0 LISTEN  
     *.telnet       *.*        0  0 128000  0 LISTEN  
     *.shell       *.*        0  0 128000  0 LISTEN  
     *.60838       *.*        0  0 128000  0 LISTEN  
     *.56894       *.*        0  0 128000  0 LISTEN  
     *.53672       *.*        0  0 128000  0 LISTEN  
     *.63720       *.*        0  0 128000  0 LISTEN  
     *.ssh        *.*        0  0 128000  0 LISTEN  
localhost.smtp       *.*        0  0 128000  0 LISTEN  
     *.80        *.*        0  0 128000  0 LISTEN  
     *.2000       *.*        0  0 128000  0 LISTEN  
     *.443        *.*        0  0 128000  0 LISTEN  

Active UNIX domain sockets 
Address Type   Vnode  Conn Local Addr  Remote Addr 
ffffff0119f107b8 stream-ord 00000000  00000000         
ffffff0119f10b68 stream-ord 00000000  00000000         
ffffff0119214050 stream-ord 00000000  00000000         
ffffff0119214400 stream-ord 00000000  00000000         
ffffff0119214b60 stream-ord 00000000  00000000         
ffffff0114119048 stream-ord 00000000  00000000         
ffffff01141193f8 stream-ord ffffff011950e580 00000000 /tmp/dbus-3YiNfXlgwn     
ffffff01141197a8 stream-ord ffffff0119217e40 00000000 /tmp/dbus-7BNzAEnmYY     
ffffff0114119b58 stream-ord ffffff0114118e40 00000000 /var/run/mDNSResponder     
ffffff01138b2040 stream-ord 00000000  00000000 /var/run/dbus/system_bus_socket     
ffffff01138b23f0 stream-ord 00000000  ffffff0111d0e780    /var/run/dbus/system_bus_socket 
ffffff01138b27a0 stream-ord 00000000  00000000 /var/run/dbus/system_bus_socket     
ffffff01138b2b50 stream-ord 00000000  ffffff0111d0e780    /var/run/dbus/system_bus_socket 
ffffff0113059038 stream-ord ffffff0113835140 00000000 /var/run/.inetd.uds     
ffffff01130593e8 stream-ord 00000000  ffffff0112c5f880    /var/run/hald/dbus-9g2E5zdff9 
ffffff0113059798 stream-ord 00000000  00000000 /var/run/hald/dbus-9g2E5zdff9     
ffffff0113059b48 dgram  ffffff01130b2e00 00000000 /var/run/in.ndpd_mib     
ffffff011306d030 stream-ord ffffff0112bb5280 00000000 /var/run/in.ndpd_ipadm     
ffffff011306d3e0 stream-ord 00000000  00000000 /var/run/hald/dbus-9g2E5zdff9     
ffffff011306d790 stream-ord 00000000  00000000 /var/run/hald/dbus-9g2E5zdff9     
ffffff011306db40 stream-ord 00000000  ffffff0112c5f880    /var/run/hald/dbus-9g2E5zdff9 
ffffff0112fcb028 stream-ord 00000000  ffffff0112c5f880    /var/run/hald/dbus-9g2E5zdff9 
ffffff0112fcb3d8 stream-ord 00000000  00000000 /var/run/hald/dbus-9g2E5zdff9     
ffffff0112fcb788 stream-ord 00000000  ffffff0112c5f880    /var/run/hald/dbus-9g2E5zdff9 
ffffff0112fcbb38 stream-ord ffffff0112fd4080 00000000 /tmp/.s.PGSQL.5432     
ffffff01122c4020 stream-ord 00000000  00000000 /var/run/hald/dbus-F83hT9CGSX     
ffffff01122c43d0 stream-ord 00000000  ffffff0112c5f280    /var/run/hald/dbus-F83hT9CGSX 
ffffff01122c4780 stream-ord ffffff0112c5f280 00000000 /var/run/hald/dbus-F83hT9CGSX     
ffffff01122c4b30 stream-ord 00000000  00000000         
ffffff0112294018 stream-ord 00000000  00000000         
ffffff01122943c8 stream-ord ffffff0112c5f880 00000000 /var/run/hald/dbus-9g2E5zdff9     
ffffff0112294778 stream-ord 00000000  00000000         
ffffff0112294b28 stream-ord 00000000  00000000         
ffffff0112278010 stream-ord ffffff01122c7880 00000000 /tmp/dbus-PuCCfO9I4C     
ffffff01122783c0 stream-ord 00000000  00000000         
ffffff0112278770 stream-ord 00000000  00000000         
ffffff0112278b20 stream-ord ffffff01122a0b40 00000000 /tmp/dbus-tfcmjjMClq     
ffffff0111d08008 stream-ord 00000000  00000000         
ffffff0111d083b8 stream-ord 00000000  00000000         
ffffff0111d08768 stream-ord ffffff01121a2b40 00000000 /tmp/dbus-cEAGQX2WDo     
ffffff0111d08b18 stream-ord ffffff0111d0e780 00000000 /var/run/dbus/system_bus_socket

Zostaje uruchomiony PostgreSQL?

Źródło

2013-05-22 user2328488

+3

Czy Twoja usługa psql działa? –

+0

Proszę nie używać DataInputStream do czytania tekstu, należy również usunąć go z przykładu i ten zły pomysł jest często kopiowany. http://vanillajava.blogspot.co.uk/2012/08/java-memes-which-refuse-to-die.html –

Odpowiedz

5

Błąd "Sprawdź, czy nazwa hosta i port są poprawne, a postmaster akceptuje połączenia TCP/IP." sugeruje:

  1. Postgres nie jest uruchomiona, aby sprawdzić ten bieg netstat -a i sprawdzić, czy Postgres czeka na połączenia na porcie

  2. niewłaściwy login/hasło 5432 - spróbuj połączyć się Postgres przy użyciu konsoli lub PG Admin przy użyciu tych poświadczeń może się zdarzyć, szczególnie jeśli Postgres jest w systemie Linux, to nie zezwala na połączenia TCP/IP ze względów bezpieczeństwa. Musisz to włączyć. Wyszukaj w sieci "włącz zdalne połączenie PostgreSQL" lub "włącz połączenie TCP/IP Postgres", jest planty informacji.

Źródło

2013-05-22 18:54:57

+0

Ta wiadomość w pytaniu nie została wygenerowana z powodu niewłaściwej nazwy użytkownika/hasła (w wyniku tego pojawi się komunikat "_FATAL : uwierzytelnianie hasła nie powiodło się dla użytkownika "xyz" _ " –

+0

@PiotrKochanski Dodałem wynik polecenia' netstat -a' .Wyjaś mi to (bez względu na przyczynę w pierwszym punkcie twojej odpowiedzi) – user2328488

+0

@SotiriosDelimanolis Dodałem wynik polecenia 'netstat -a', czy uruchamiany jest postgresql (jak ogólnie go się nauczyć)? – user2328488

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