Hello! As far as my understanding goes, ZookeeperClusterNode is not a Zookeeper daemon but a cluster node (i.e. Apache Ignite) which is managed by Zookeeper discovery. So it's natural that a connection will be initiated to such node.
Modern TCP firewalls usually null route connection attempts to closed ports, hence you can not see communication problems for a long time and yet the connection won't be established. Regards, -- Ilya Kasnacheev 2018-07-25 17:30 GMT+03:00 Larry Mark <larry.m...@principled.io>: > The logs do not indicate any connectivity problem, unless I am missing it, > in which case please point it out to me. > > The messages seem to be getting through fine, but the server thinks there > is a connection which does not exist, so it rejects it. This seems to > happen because the communication SPI has opened a connection to zookeeper. > Why would the communications SPI ( not discovery ) be initiating a > connection to zookeeper? > it seems like the connection to zookeeper is making an entry in the array > of GridCommunicationClient that is causing the communications SPI to think > a client is connected when it is not, and to reject the connections. > > If this is off base, please tell me what I am missing. > > > > > > On Wed, Jul 25, 2018 at 6:25 AM, Ilya Kasnacheev < > ilya.kasnach...@gmail.com> wrote: > >> Hello! >> >> This might happen when there's connectivity problems, i.e. when node A >> can connect to node B but not vice versa. >> >> You can also try increasing socketWriteTimeout on communicationSpi if >> communication connections die mid-flight. >> >> >> Regards, >> >> -- >> Ilya Kasnacheev >> >> 2018-07-25 0:16 GMT+03:00 lmark58 <larry.m...@principled.io>: >> >>> When using zoo keeper discovery I am getting intermittent errors with >>> clients >>> connecting. >>> >>> Scenario - I have one ignite server running, try to connect with 4 >>> clients. >>> >>> For one of the connecting clients the socket between the client and >>> server >>> is never established and the log repeats the message >>> o.a.i.s.c.tcp.TcpCommunicationSpi - Received incoming connection from >>> remote >>> node while connecting to this node, rejecting >>> >>> The problem is intermittent, but whenever it happens, I see a log entry >>> that >>> the server is initiating a connection to zoo keeper. >>> o.a.i.s.c.tcp.TcpCommunicationSpi - Creating NIO client to node: >>> ZookeeperClusterNode [id=8b66ad54-0357-43a5-8d6e-0d11eda90b10, >>> addrs=[10.2.91.45, 127.0.0.1], order=2, loc=false, client=true] >>> >>> Attached is a section of the log that shows the clients connecting. I >>> cannot post a full log to a public forum, but if the attached is not >>> enough, >>> once a contributor picks this up and replies I can send a longer log to >>> them >>> directly. >>> >>> Thanks >>> mini.log >>> <http://apache-ignite-users.70518.x6.nabble.com/file/t1285/mini.log> >>> >>> >>> >>> -- >>> Sent from: http://apache-ignite-users.70518.x6.nabble.com/ >>> >> >> >
