tomcat-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Martin Dubuc <>
Subject Re: IPv6 Issue with Tomcat
Date Sat, 12 Feb 2011 13:31:51 GMT
Thanks for all your response guys. Chuck's recommendation did fix my
problem. I also liked the loopback recommendation.


On Fri, Feb 11, 2011 at 10:17 AM, Martin Dubuc <>wrote:

> On my Tomcat server (currently running version 6.x), I have set up a
> firewall rule to drop all IPv6 traffic. It seems that this is causing some
> issue on startup, because the startup delay is noticeable (takes around 3
> minutes) when the IPv6 firewall rule is on. If the IPv6 rule is not on, the
> server usually starts in a few seconds. By looking more closely at the
> problem, my understanding is that the delay is caused by the server trying
> to access the database realm. It is using JDBC to connect to the database.
> The driver is likely trying to communicate first using IPv6 and when a
> timeout occurs (because all IPv6 packets are dropped by the firewall), the
> driver switches back to IPv4 and then the startup is able to complete. To
> me, this seems to be a JDBC driver issue, but I am wondering if there is
> configuration within Tomcat to force the driver not to use IPv6.
> Martin

  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message