ONS configuration failed

System information:

• Operating system (distribution) and version: Windows Server 2016 Datacenter
• DBeaver version: 7.1.0.202005311732
• Java version: Version 8 Update 251

Connection specification:

• Database name and version: Oracle
• Driver name: Oracle, 12.2.0.1
• Do you use tunnels or proxies (SSH, SOCKS, etc)? no

Describe the problem you’re observing:

After latest update I can’t connect to Oracle database anymore. After trying to connect for ~30sec connection failing with error:

Unexpected driver error occurred while connecting  to the database
    ONS configuration failed
    ONS configuration failed
        Subscription time out

Oracle SQL Developer portable works completely fine on this machine without any problems.

Include any warning/errors/backtraces from the logs

Debug log:

> Start Eclipse IDE UI Application [org.eclipse.ui.ide.application 1.3.600.v20200116-2127]
> Start Eclipse e4 Workbench SWT [org.eclipse.e4.ui.workbench.swt 0.14.900.v20200213-1442]
> Start Eclipse Application Services [org.eclipse.e4.core.services 2.2.200.v20200127-0814]
> Start Eclipse Contexts [org.eclipse.e4.core.contexts 1.8.400.v20191217-1710]
> Start Eclipse UI Application Services [org.eclipse.e4.ui.services 1.3.700.v20190930-1643]
> Start ICU4J Base [com.ibm.icu.base 58.2.0.v20170418-1837]
> Start EMF Common [org.eclipse.emf.common 2.18.0.v20191225-1014]
> Start EMF Ecore [org.eclipse.emf.ecore 2.21.0.v20200127-1342]
> Start EMF XML/XMI Persistence [org.eclipse.emf.ecore.xmi 2.16.0.v20190528-0725]
> Start Eclipse UI Dependency Injection [org.eclipse.e4.ui.di 1.2.800.v20200128-0855]
> Start Eclipse e4 Workbench Add-ons [org.eclipse.e4.ui.workbench.addons.swt 1.3.800.v20191212-1231]
> Start Expression Language [org.eclipse.core.expressions 3.6.700.v20200212-1751]
> Start Eclipse e4 Workbench SWT Renderer [org.eclipse.e4.ui.workbench.renderers.swt 0.14.1100.v20200217-1217]
> Start Eclipse Bindings Support [org.eclipse.e4.ui.bindings 0.12.800.v20191216-0805]
> Start Eclipse Dependency Injection Extensions [org.eclipse.e4.core.di.extensions 0.15.500.v20200106-1259]
> Start Eclipse CSS SWT Support [org.eclipse.e4.ui.css.swt 0.13.900.v20200203-0840]
> Start Eclipse CSS SWT Theme Support [org.eclipse.e4.ui.css.swt.theme 0.12.600.v20200124-0005]
> Start DBeaver UI [org.jkiss.dbeaver.ui 5.1.49.202005311732]
> Start Help System Core [org.eclipse.help 3.8.700.v20191212-1123]
> Start Equinox Provisioning Core [org.eclipse.equinox.p2.core 2.6.300.v20200211-1504]
> Start Equinox Provisioning Operations API [org.eclipse.equinox.p2.operations 2.5.700.v20191211-1713]
> Start Equinox Provisioning Platform Automatic Update Support [org.eclipse.equinox.p2.ui.sdk.scheduler 1.4.600.v20200221-0754]
> Start Equinox Provisioning Update Checker [org.eclipse.equinox.p2.updatechecker 1.2.300.v20200222-1600]
> Start Equinox Provisioning Metadata [org.eclipse.equinox.p2.metadata 2.4.700.v20191213-1911]
> Start Equinox Provisioning Engine [org.eclipse.equinox.p2.engine 2.6.600.v20200110-2121]
> Start Equinox Provisioning Metadata Repository [org.eclipse.equinox.p2.metadata.repository 1.3.400.v20191211-1528]
> Start Equinox Provisioning Repository [org.eclipse.equinox.p2.repository 2.4.700.v20200110-2121]
> Start DBeaver SQL Model [org.jkiss.dbeaver.model.sql 1.0.24.202005311732]
> Start Equinox Provisioning UI Support [org.eclipse.equinox.p2.ui 2.5.800.v20200213-1530]
> Start Default Text Editor [org.eclipse.ui.editors 3.13.100.v20200130-1507]
> Start Text Editor Framework [org.eclipse.ui.workbench.texteditor 3.14.100.v20200212-1049]
> Start DBeaver UI Editors - Base [org.jkiss.dbeaver.ui.editors.base 1.0.34.202005311732]
> Start DBeaver UI Editors - SQL [org.jkiss.dbeaver.ui.editors.sql 1.0.34.202005311732]
> Start DBeaver UI Editors - Data [org.jkiss.dbeaver.ui.editors.data 1.0.34.202005311732]
> Start DBeaver Sample Database [org.jkiss.dbeaver.ext.sample.database 1.0.71.202005311732]
> Start DBeaver Tip of the day [org.jkiss.dbeaver.ext.ui.tipoftheday 1.0.40.202005311732]
> Start DBeaver ER Diagram [org.jkiss.dbeaver.ext.erd 2.0.136.202005311732]
> Start File Buffers [org.eclipse.core.filebuffers 3.6.900.v20200117-0616]
> Start DBeaver UI Editors - Connections [org.jkiss.dbeaver.ui.editors.connection 1.0.25.202005311732]
> Start DBeaver Oracle UI [org.jkiss.dbeaver.ext.oracle.ui 1.0.21.202005311732]
> Start DBeaver Oracle Support [org.jkiss.dbeaver.ext.oracle 2.1.119.202005311732]
> Start Java Native Access [com.sun.jna 4.5.1.v20190425-1842]
> Start DBeaver SSH tunnels [org.jkiss.dbeaver.net.ssh.ui 1.0.55.202005311732]
> Start DBeaver SSH tunnels [org.jkiss.dbeaver.net.ssh 1.0.55.202005311732]
> Start Team Support Core [org.eclipse.team.core 3.8.900.v20200211-0946]
> Start Equinox Java Authentication and Authorization Service (JAAS) [org.eclipse.equinox.security 1.3.500.v20200114-1637]
Jun 17, 2020 5:09:08 PM oracle.simplefan.impl.FanManager configure
SEVERE: attempt to configure ONS in FanManager failed with oracle.ons.NoServersAvailable: Subscription time out
Jun 17, 2020 5:20:11 PM oracle.simplefan.impl.FanManager configure
SEVERE: attempt to configure ONS in FanManager failed with oracle.ons.NoServersAvailable: Subscription time out

[p91paul]

This happens to me every now and then with a specific server. I’m able to fix it with those steps:

1. Open connection properties
2. Click “Test connection”
3. Stop the test before it times out
4. Test again
5. It works!

It then continues to work for weeks. When the problem happens again, I just repeat the steps above.

[lorenzomartinelli]

Set: -Doracle.jdbc.fanEnabled=false

https://support.oracle.com/epmos/faces/DocumentDisplay?_afrLoop=99525057147918&parent=EXTERNAL_SEARCH&sourceId=PROBLEM&id=2308193.1&_afrWindowMode=0&_adf.ctrl-state=g3tq88y1z_53

In dbeaver Database / Driver Manager select Oracle and define the connection properties oracle.jdbc.fanEnabled and set to false