[MonetDB-users] Merovingian Neighbour discovery
Trying to get Merovingian to act as a front end to MonetDB cluster. When I start the Mero service this shows up in the log. 2009-07-16 11:28:10 ERR merovingian[2276]: HELO message: error while sending message: Network is unreachable 2009-07-16 11:28:10 ERR merovingian[2276]: ANNC message: error while sending message: Network is unreachable I can connect back and forth between the two Mero/Monet instances using mclient --lsql, but for some reason the instances of Mero can't discover eachother. I think Mero is using UDP which could be contributing to the issue. Any tips for troubleshooting Mero connectivity over UDP? Related to this, is there anyway I can just tell one instance of Mero about the other without auto discovery and proxy that way? Thanks! -Ross
On 16-07-2009 12:23:21 -0500, Ross Bates wrote:
Trying to get Merovingian to act as a front end to MonetDB cluster. When I start the Mero service this shows up in the log.
2009-07-16 11:28:10 ERR merovingian[2276]: HELO message: error while sending message: Network is unreachable 2009-07-16 11:28:10 ERR merovingian[2276]: ANNC message: error while sending message: Network is unreachable
I can connect back and forth between the two Mero/Monet instances using mclient --lsql, but for some reason the instances of Mero can't discover eachother.
I think Mero is using UDP which could be contributing to the issue. Any tips for troubleshooting Mero connectivity over UDP?
Indeed, discovery is done using UDP. I did change some things in the current development version of MonetDB, which might solve this problem, but I'm not sure. Normally, the "Network is unreachable" message indicates a routing table problem.
Related to this, is there anyway I can just tell one instance of Mero about the other without auto discovery and proxy that way?
There is a feature request [1] for that because some nodes may be located where normal broadcasting won't go. [1] https://sourceforge.net/tracker/?func=detail&aid=2801350&group_id=56967&atid=482471
Wonderful, glad to see it's in the pipeline. I'll keep my eye on the ticket,
let me know if there is anything you need help testing in the daily builds.
Thanks Fabian.
On Thu, Jul 16, 2009 at 2:02 PM, Fabian Groffen
On 16-07-2009 12:23:21 -0500, Ross Bates wrote:
Trying to get Merovingian to act as a front end to MonetDB cluster. When I start the Mero service this shows up in the log.
2009-07-16 11:28:10 ERR merovingian[2276]: HELO message: error while sending message: Network is unreachable 2009-07-16 11:28:10 ERR merovingian[2276]: ANNC message: error while sending message: Network is unreachable
I can connect back and forth between the two Mero/Monet instances using mclient --lsql, but for some reason the instances of Mero can't discover eachother.
I think Mero is using UDP which could be contributing to the issue. Any tips for troubleshooting Mero connectivity over UDP?
Indeed, discovery is done using UDP. I did change some things in the current development version of MonetDB, which might solve this problem, but I'm not sure. Normally, the "Network is unreachable" message indicates a routing table problem.
Related to this, is there anyway I can just tell one instance of Mero about the other without auto discovery and proxy that way?
There is a feature request [1] for that because some nodes may be located where normal broadcasting won't go.
[1] https://sourceforge.net/tracker/?func=detail&aid=2801350&group_id=56967&atid=482471
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participants (2)
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Fabian Groffen -
Ross Bates