- First thing is to check your firewall authorizes you to connect to outbound port 3306. To verify this, you can runPortQryV2. (it's a free port scanner made available for free by Microsoft) with the following command line
PortQry.exe -n <server name or IP address> -e 3306.
If you firewall is correctly configured you should get an output similar to:
c:\PortQryV2>PortQry.exe -n 188.8.131.52 -e 3306 Querying target system called: 184.108.40.206 Attempting to resolve IP address to a name... IP address resolved to xqual7.xqual.com querying... TCP port 3306 (unknown service): LISTENING
Alternatively, you can also use the command
telnet <server name or IP address> 3306. If you get garbage characters it means the firewall is ok.
- Check in the
xstudio.conffile that you're using a real resolvable name or a valid IP address for the
database_serverparameter. Do NOT use
- Check that the
- Check you do not have extra leading or ending space in the parameter's values in
- If the standalone version works fine (you can start XStudio, login and use it), you can:
xstudio.confto your web server install (overwrite the default one in the
- Copy the JDBC driver you're using in the standalone version to the web server as well (in
- This can be due to one or several corrupted packages (i.e. because of a network failure during the download), so you can try to clear the Java cache to force the system to download all the resources again:
Windows start menu > Control Panel > Programs > Java > General > Temporary Internet Files > View...
Select "Applications" in the "Show" drop-down menu, select all the XStudio instances, delete them
Select "Resources"in the "Show" drop-down menu, select everything and delete
Restart XStudio normally...
- In some cases, this may be due to DNS issues. Of course the proper solution is to fix the problem on your company DNS server but a workaround is to insert the server anem into your local
/etc/hosts(on linux) or
(on Windows) file.
- It can also be due to networking issue. One thing people sometimes need to do is to change the network settings of their Java client:
Windows start menu > Control Panel > Programs > Java > General > Network Settings > Network Settings....
It may be needed to select
Direct Connectioninstead of
Use Browser Settingsor vice-versa. In some other cases, it may be necessary to set the company proxy settings manually.
- If your client computer does not have much RAM you can reduce the maximum heap size in the JNLP configuration on the server.
xstudio.jnlpand lower the
- In some computers, JNLP may prefer to use the IPv4 stack to communicate with the server. You can try to edit
xstudio.jnlpand set the
java.net.preferIPv4Stackto true. i.e. your j2se parameter may look like:
j2se version="1.7" href="http://java.sun.com/products/autodl/j2se" java-vm args="-Djava.net.preferIPv4Stack=true".
- You may also try to uninstall your jre and reinstall it from
The instructions related to
xstudio.conf are also valid for