Set as Default for Postgres Databases fails

System information:

• Windows 10 Pro Version 2004 (Build 19041.84)
• 6.3.5.202002151353

Connection specification:

• PostgreSql 9.6
• PostgreSQL standard driver
• Do you use tunnels or proxies (SSH, SOCKS, etc) : SSH

Describe the problem you’re observing:

Switching to another database is clumsy and fails most of the time with error below:

SQL Error [08001]: Connection to 127.0.0.1:15045 refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections.

However, there is no connection issue and it was working fine on previous version. That was 6.2.4 or something.

Steps to reproduce, if exist:

Include any warning/errors/backtraces from the logs

org.postgresql.util.PSQLException: Connection to 127.0.0.1:16042 refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections.
	at org.postgresql.Driver$ConnectThread.getResult(Driver.java:403)
	at org.postgresql.Driver.connect(Driver.java:261)
	at org.jkiss.dbeaver.model.impl.jdbc.JDBCDataSource.lambda$0(JDBCDataSource.java:157)
	at org.jkiss.dbeaver.model.impl.jdbc.JDBCDataSource.openConnection(JDBCDataSource.java:174)
	at org.jkiss.dbeaver.ext.postgresql.model.PostgreDataSource.openConnection(PostgreDataSource.java:311)
	at org.jkiss.dbeaver.model.impl.jdbc.JDBCExecutionContext.connect(JDBCExecutionContext.java:91)
	at org.jkiss.dbeaver.model.impl.jdbc.JDBCExecutionContext.connect(JDBCExecutionContext.java:80)
	at org.jkiss.dbeaver.model.impl.jdbc.JDBCExecutionContext.getConnection(JDBCExecutionContext.java:181)
	at org.jkiss.dbeaver.model.impl.jdbc.exec.JDBCConnectionImpl.getOriginal(JDBCConnectionImpl.java:60)
	at org.jkiss.dbeaver.model.impl.jdbc.exec.JDBCConnectionImpl.cancelBlock(JDBCConnectionImpl.java:693)
	at org.jkiss.dbeaver.model.runtime.BlockCanceler.cancelBlock(BlockCanceler.java:36)
	at org.jkiss.dbeaver.model.runtime.AbstractJob$JobCanceler.run(AbstractJob.java:221)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
Caused by: java.net.ConnectException: Connection refused: connect
	at java.base/java.net.PlainSocketImpl.waitForConnect(Native Method)
	at java.base/java.net.PlainSocketImpl.socketConnect(Unknown Source)
	at java.base/java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
	at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
	at java.base/java.net.AbstractPlainSocketImpl.connect(Unknown Source)
	at java.base/java.net.SocksSocketImpl.connect(Unknown Source)
	at java.base/java.net.Socket.connect(Unknown Source)
	at org.postgresql.core.PGStream.<init>(PGStream.java:69)
	at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:158)
	at org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:49)
	at org.postgresql.jdbc.PgConnection.<init>(PgConnection.java:195)
	at org.postgresql.Driver.makeConnection(Driver.java:452)
	at org.postgresql.Driver.access$100(Driver.java:61)
	at org.postgresql.Driver$ConnectThread.run(Driver.java:362)
	at java.base/java.lang.Thread.run(Unknown Source)
!SUBENTRY 3 org.jkiss.dbeaver.model 4 0 2020-02-19 11:41:40.873
!MESSAGE Connection refused: connect
!STACK 0
java.net.ConnectException: Connection refused: connect
	at java.base/java.net.PlainSocketImpl.waitForConnect(Native Method)
	at java.base/java.net.PlainSocketImpl.socketConnect(Unknown Source)
	at java.base/java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
	at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
	at java.base/java.net.AbstractPlainSocketImpl.connect(Unknown Source)
	at java.base/java.net.SocksSocketImpl.connect(Unknown Source)
	at java.base/java.net.Socket.connect(Unknown Source)
	at org.postgresql.core.PGStream.<init>(PGStream.java:69)
	at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:158)
	at org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:49)
	at org.postgresql.jdbc.PgConnection.<init>(PgConnection.java:195)
	at org.postgresql.Driver.makeConnection(Driver.java:452)
	at org.postgresql.Driver.access$100(Driver.java:61)
	at org.postgresql.Driver$ConnectThread.run(Driver.java:362)
	at java.base/java.lang.Thread.run(Unknown Source)
!SESSION 2020-02-19 11:43:06.566 -----------------------------------------------
eclipse.buildId=unknown
java.version=11.0.5
java.vendor=AdoptOpenJDK
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_US
Command-line arguments:  -os win32 -ws win32 -arch x86_64

!ENTRY org.eclipse.jface 2 0 2020-02-19 11:43:22.529
!MESSAGE Keybinding conflicts occurred.  They may interfere with normal accelerator operation.
!SUBENTRY 1 org.eclipse.jface 2 0 2020-02-19 11:43:22.529
!MESSAGE A conflict occurred for CTRL+N:
Binding(CTRL+N,
	ParameterizedCommand(Command(org.eclipse.ui.newWizard,New,
		Open the New item wizard,
		Category(org.eclipse.ui.category.file,File,null,true),
		org.eclipse.ui.internal.WorkbenchHandlerServiceHandler@3da55998,
		[Parameter(newWizardId,New Wizard,null,true)],,true),null),
	org.eclipse.ui.defaultAcceleratorConfiguration,
	org.eclipse.ui.contexts.window,,,system)
Binding(CTRL+N,
	ParameterizedCommand(Command(org.jkiss.dbeaver.core.sql.editor.open,SQL Editor,
		Open SQL editor (existing or new),
		Category(org.jkiss.dbeaver.core.database,Connection,Database Connection Commands,true),
		org.eclipse.ui.internal.WorkbenchHandlerServiceHandler@40ebb56,
		,,true),null),
	org.jkiss.dbeaver.defaultKeyScheme,
	org.jkiss.dbeaver.ui.perspective,,,user)
Binding(CTRL+N,
	ParameterizedCommand(Command(org.jkiss.dbeaver.core.sql.editor.create,New SQL Editor,
		Open new SQL editor (create new script),
		Category(org.jkiss.dbeaver.core.database,Connection,Database Connection Commands,true),
		org.eclipse.ui.internal.WorkbenchHandlerServiceHandler@5b2fc2c0,
		,,true),null),
	org.jkiss.dbeaver.defaultKeyScheme,
	org.jkiss.dbeaver.ui.perspective,,,user)

[serge-rider]

@uslss please try to reproduce it by putting your machine in sleep mode or by switching to another wifi or by plugging off the network.

[uslss]

Probably it is completely broken, invalidate doesn’t help, only disconnect and then connect to db does