I've run into a problem with Riak freezing completely on one node running
on Ubuntu 12.04 LTS on a XEN VM (EC2). If I ssh into the node and run "ps
ax" that shell session also freezes. I also tried another ssh session with
"netstat -lnp" to see if I could find the process ID to kill, but that also
Any chance you are overflowing into swap? Or in the case of XEN have you
exceeded the guaranteed RAM for the VM memory and moved into the disk backed
portion of "ram"?
What backend do you use within riak? Do you have memory statistics from before
and after the seizure/freeze?
Matthew
On M
We are using AMazon EC2 m3.x2large nodes and while the freeze is occurring
free reports
total used free sharedbuffers cached
Mem: 306232328818792 21804440 0 880924411832
-/+ buffers/cache:4318868 26304364
Swap:0
I thought I knew the cause of this problem. I do not. We need to await input
from others.
My apologies.
Other basic questions will be: what version of Riak, what is your app.config,
how many servers/nodes, any reason this one node is "different"?
Matthew
On Mar 19, 2014, at 5:30 PM, Micha
I'm running Riak2.0pre11 but I keep mentioning Erlang because I have seen a
similar situation with hanging a couple of years ago with RabbitMQ. I
suspect that even if there is a Riak bug involved, there is probably also
some Erlang problem as well.
Now I have discovered that by using "pstree -p" I
I'm trying to remember some of the pain points of Riak in production on EC2
back 2.5 years ago. Riak is a different product now, but EC2 is still a
challenging environment.
Do you have any monitoring on the state of network interfaces? Is it
possible the IP of one of the nodes changed from underne
On 19/03/14 20:56, Michael Dillon wrote:
> I've run into a problem with Riak freezing completely on one node
> running on Ubuntu 12.04 LTS on a XEN VM (EC2). If I ssh into the node
> and run "ps ax" that shell session also freezes. I also tried another
> ssh session with "netstat -lnp" to see if I
