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Editorial Team
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Asked: 2026-05-14T21:18:45+00:00

I am using jdbc to connect to a postgresql database in a java application

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I am using jdbc to connect to a postgresql database in a java application (actually the app is written in Groovy). I have postgresql set up to use the ‘trust’ authentication method. Is it possible to open a jdbc connection without specifying a password? When I try to use the normal constructor with a blank password, it fails with 

Exception in thread "Thread-2" org.postgresql.util.PSQLException: FATAL: password authentication failed for user "myuser"

Even though, from the command line, this works fine

psql -U myuser mydatabase
Welcome to psql 8.3.5, the PostgreSQL interactive terminal.

Type:  \copyright for distribution terms
      \h for help with SQL commands
      \? for help with psql commands
      \g or terminate with semicolon to execute query
      \q to quit
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1 Answer

  1. Editorial Team

    Yes, you can.

    Note that Postres JDBC driver always uses IP sockets (host in pg_hba.conf), even if database is on the local machine, then psql can use local sockets (local in pg_hba.conf). So, if psql works with trust authentication and JDBC doesn’t, you probably should configure trust authentication for IP sockets, see documentation.

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