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Posted to user@zookeeper.apache.org by rammohan ganapavarapu <ra...@gmail.com> on 2016/07/15 19:47:43 UTC
Server not running error in log but server actually running
Hi,
I see below message in zookeeper.log file but when i check process zk
process is running and i can telnet to 2181 port, why am i getting this
message and how to avoid this?
2016-07-15 19:22:14,222 - WARN [NIOServerCxn.Factory:
0.0.0.0/0.0.0.0:2181:NIOServerCnxn@354] - Exception causing close of
session 0x0 due to java.io.IOException: ZooKeeperServer not running
Thanks,
Ram
Re: Server not running error in log but server actually running
Posted by svk <sh...@gmail.com>.
This can also happen if the server ensemble has gone down. For example, if
there is no longer a quorum of servers
Thanks and regards,
Shreyas
On Fri, Jul 15, 2016 at 1:54 PM, rammohan ganapavarapu <
rammohanganap@gmail.com> wrote:
> But unfortunately i did not restart server though! i see these on the
> running server.
>
> Ram
>
> On Fri, Jul 15, 2016 at 1:48 PM, Dan Benediktson <
> dbenediktson@twitter.com.invalid> wrote:
>
> > I think you see this message when clients are trying to connect while the
> > server isn't fully up yet. For instance, if you restart the Zookeeper
> > process while clients are actively talking to it, you're likely to see a
> > lot of these, but it'll clear up as soon as the server is fully up.
> > Basically, the network layer has finished starting up before the rest of
> > the service has finished starting up, so the network layer drops the
> > incoming connections until the rest of Zookeeper is up and able to handle
> > them.
> >
> > Dan
> >
> > On Fri, Jul 15, 2016 at 12:47 PM, rammohan ganapavarapu <
> > rammohanganap@gmail.com> wrote:
> >
> > > Hi,
> > >
> > > I see below message in zookeeper.log file but when i check process zk
> > > process is running and i can telnet to 2181 port, why am i getting this
> > > message and how to avoid this?
> > >
> > > 2016-07-15 19:22:14,222 - WARN [NIOServerCxn.Factory:
> > > 0.0.0.0/0.0.0.0:2181:NIOServerCnxn@354] - Exception causing close of
> > > session 0x0 due to java.io.IOException: ZooKeeperServer not running
> > >
> > > Thanks,
> > > Ram
> > >
> >
>
Re: Server not running error in log but server actually running
Posted by rammohan ganapavarapu <ra...@gmail.com>.
But unfortunately i did not restart server though! i see these on the
running server.
Ram
On Fri, Jul 15, 2016 at 1:48 PM, Dan Benediktson <
dbenediktson@twitter.com.invalid> wrote:
> I think you see this message when clients are trying to connect while the
> server isn't fully up yet. For instance, if you restart the Zookeeper
> process while clients are actively talking to it, you're likely to see a
> lot of these, but it'll clear up as soon as the server is fully up.
> Basically, the network layer has finished starting up before the rest of
> the service has finished starting up, so the network layer drops the
> incoming connections until the rest of Zookeeper is up and able to handle
> them.
>
> Dan
>
> On Fri, Jul 15, 2016 at 12:47 PM, rammohan ganapavarapu <
> rammohanganap@gmail.com> wrote:
>
> > Hi,
> >
> > I see below message in zookeeper.log file but when i check process zk
> > process is running and i can telnet to 2181 port, why am i getting this
> > message and how to avoid this?
> >
> > 2016-07-15 19:22:14,222 - WARN [NIOServerCxn.Factory:
> > 0.0.0.0/0.0.0.0:2181:NIOServerCnxn@354] - Exception causing close of
> > session 0x0 due to java.io.IOException: ZooKeeperServer not running
> >
> > Thanks,
> > Ram
> >
>
Re: Server not running error in log but server actually running
Posted by Dan Benediktson <db...@twitter.com.INVALID>.
I think you see this message when clients are trying to connect while the
server isn't fully up yet. For instance, if you restart the Zookeeper
process while clients are actively talking to it, you're likely to see a
lot of these, but it'll clear up as soon as the server is fully up.
Basically, the network layer has finished starting up before the rest of
the service has finished starting up, so the network layer drops the
incoming connections until the rest of Zookeeper is up and able to handle
them.
Dan
On Fri, Jul 15, 2016 at 12:47 PM, rammohan ganapavarapu <
rammohanganap@gmail.com> wrote:
> Hi,
>
> I see below message in zookeeper.log file but when i check process zk
> process is running and i can telnet to 2181 port, why am i getting this
> message and how to avoid this?
>
> 2016-07-15 19:22:14,222 - WARN [NIOServerCxn.Factory:
> 0.0.0.0/0.0.0.0:2181:NIOServerCnxn@354] - Exception causing close of
> session 0x0 due to java.io.IOException: ZooKeeperServer not running
>
> Thanks,
> Ram
>