I have created an issue, but I am a neophyte at Jira and how to use it on projects like this. Can you review to make sure I got all the fields correct? Thanks!
https://issues.apache.org/jira/browse/ZEPPELIN-113 On Tue, Jun 16, 2015 at 10:26 PM, moon soo Lee <m...@apache.org> wrote: > Hi, > > Thanks for the feedback. > > I think it really make sense to have some kind of heartbeat to keep > connection alive in such environment. > Could you create an issue for it? > > Thanks, > moon > > > On Tue, Jun 16, 2015 at 10:16 AM John Omernik <j...@omernik.com> wrote: > >> Hello - >> >> I am playing around with Zeppelin in a mesos/docker setup and am using >> HAProxy/mesosDNS to connect to my instances. >> >> For those who want a cliff notes on this, HAProxy takes apps started in >> marathon and routes them to appropriate host on the mesos cluster, the >> mesos-DNS allows me to have hosts connect directly to the instances running >> in Docker. >> >> One thing I've noticed (and this is an issue with the HAProxy stuff in >> general, not sure Zeppelin) is if the TCP connection running through >> HAProxy is long running with not a lot of activity, HAProxy will think the >> connection is dead and terminate it. This can be a pain for say long >> running queries with a Hive Thrift server. >> >> In Zeppelin, it appears that the problem manifests itself when there is >> no activity in a notebook, and the "Connected (with a green box)" in the >> Upper right changes to "Disconnected (with a red box)" >> >> Basically HAProxy closes the connection. To fix, I just refresh, and >> things work fine, but it's annoying to say the least. Would it be possibly >> to setup HTTP keep alives on these connections? I am not an expert on web >> servers being used in Zeppelin, but having an option to be able to send >> keep alives when the notebook is open ever X seconds if no other activity >> would solve this problem well. I know this may see minor, but there may be >> others using it in an environment with HAProxy or other similar setups, and >> if the effort is low on something like, it would be greatly appreciated. >> >
