引起：org.postgresql.util.PSQLException：致命：用户“admin”的密码验证失败

Question

When I try to connect to my PostgreSQL server using my credentials using (pgadmin iii - postgres sqltool) it works fine. When I try to connect from my java application I get the below logs. It's weird

org.springframework.transaction.CannotCreateTransactionException: Could not open JDBC Connection for transaction; nested exception is org.postgresql.util.PSQLException: FATAL: password authentication failed for user "admin"
    at org.springframework.jdbc.datasource.DataSourceTransactionManager.doBegin(DataSourceTransactionManager.java:240)
    at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:371)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:335)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:105)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
    at $Proxy8.getCollegeDetails(Unknown Source)
    at com.cts.bo.HESBO.registerCourse(HESBO.java:42)
    at com.cts.facade.HESFacade.registerCourse(HESFacade.java:34)
    at com.cts.manager.HESManager.registerCourse(HESManager.java:34)
    at com.cts.presentation.Tester.registerCourse(Tester.java:66)
    at com.cts.presentation.Tester.main(Tester.java:159)
**Caused by: org.postgresql.util.PSQLException: FATAL: password authentication failed for user "admin"**
    at org.postgresql.core.v3.ConnectionFactoryImpl.doAuthentication(ConnectionFactoryImpl.java:415)
    at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:188)
    at org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:64)
    at org.postgresql.jdbc2.AbstractJdbc2Connection.<init>(AbstractJdbc2Connection.java:143)
    at org.postgresql.jdbc3.AbstractJdbc3Connection.<init>(AbstractJdbc3Connection.java:29)
    at org.postgresql.jdbc3g.AbstractJdbc3gConnection.<init>(AbstractJdbc3gConnection.java:21)
    at org.postgresql.jdbc3g.Jdbc3gConnection.<init>(Jdbc3gConnection.java:24)
    at org.postgresql.Driver.makeConnection(Driver.java:412)
    at org.postgresql.Driver.connect(Driver.java:280)
    at java.sql.DriverManager.getConnection(Unknown Source)
    at java.sql.DriverManager.getConnection(Unknown Source)
    at org.springframework.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriverManager(DriverManagerDataSource.java:173)
    at org.springframework.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriver(DriverManagerDataSource.java:164)
    at org.springframework.jdbc.datasource.AbstractDriverBasedDataSource.getConnectionFromDriver(AbstractDriverBasedDataSource.java:149)
    at org.springframework.jdbc.datasource.AbstractDriverBasedDataSource.getConnection(AbstractDriverBasedDataSource.java:119)
    at org.springframework.jdbc.datasource.DataSourceTransactionManager.doBegin(DataSourceTransactionManager.java:202)
    ... 11 more

.properties file

jdbc.driverClassName=org.postgresql.Driver
jdbc.url=jdbc:postgresql://localhost:5432/postgres

jdbc.password=admin
jdbc.username=admin

spring.xml

<bean
        class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="location">
            <value>com\cts\resource\constant.properties</value>
        </property>
    </bean>

    <bean id="dataSource"
        class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="${jdbc.driverClassName}" />
        <property name="url" value="${jdbc.url}" />
        <property name="username" value="${jdbc.username}" />
        <property name="password" value="${jdbc.password}" />
    </bean> 

    <bean id="transactionManager"
          class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>

Any help on this is much appreciated, I am just not able to progress because of this weird error.

Answer 1

If you have not tried this already, review your pg_hba.conf file. It will be named something like

/etc/postgresql/9.6/main/pg_hba.conf # Ubuntu 16.04
/var/lib/pgsql/9.3/data/pg_hba.conf # Fedora 20

You may have to use find / -name pg_hba.conf to locate it.

At the bottom of the file, change the METHOD values to trust for local testing (see postgres docs for full information). Restart postgres to ensure everything is started clean and the new params are read:

sudo systemctl restart postgresql     # ubuntu

Hopefully this will cure your woes. It solved my problems on Ubuntu/Fedora.

Answer 2

I think the problem might be that the postgres database is configured to allow the only password that are hashed with md5.

You can check if this is true by going to the configuration file pg_hba.conf . Search with the following property host all all all if you find that the property is configured like below:

host all all all md5

than the issue is that you need to hash the password to md5. You can fix this by changing the configuration to:

• trust instead of md5 -> will allow user to connect without any password
• password instead of md5 -> will allow user to connect with plain text password

Answer 3

在 Login 部分下创建一个新用户并在 application.properties 中使用它，解决了这个问题。

Answer 4

I had the same problem, although I was running the PostgreSQL server inside a Docker container. I fixed it by using a different port mapping (eg 0.0.0.0:5433->5432/tcp).

Symptoms and debugging:

• The error message was "org.postgresql.util.PSQLException: FATAL: password authentication failed for user xxx".

• Changing JDBC host, port or username resulted in a different error message.

• PgAdmin was able to connect to the database.

• PgAdmin connections were shown in the PostgreSQL log (after enabling connection logging), but nothing was shown when trying to connect with JDBC.

• tcpdump port 5432 showed nothing when trying to connect with JDBC, but showed something when connecting with PgAdmin, or when sending random data with netcat.

In the end the root cause remained unclear. But obviously it was not a password problem, so the JDBC driver shouldn't say it is.

Docker version 20.10.17 running on Windows 10. PostgreSQL driver version was 42.4.1.

Answer 5

For me, its worked when i updated the version

<dependency>
        <groupId>org.postgresql</groupId>
        <artifactId>postgresql</artifactId>
        <scope>runtime</scope>
        <version>42.5.0</version>
</dependency>