Application cannot be terminated when in loop trying to connect to external zookeeper

[szpak]

When in the loop end application with micro-infra is trying to connect external zookeeper it is impossible to kill it with CTRL-C or SIGTERM. The ultimate solution in the form of SIGKILL is needed.

2015-05-06 21:45:14.190  INFO 13562 --- [caldomain:2181)] org.apache.zookeeper.ClientCnxn          : Opening socket connection to server localhost.localdomain/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)
2015-05-06 21:45:14.191  WARN 13562 --- [caldomain:2181)] org.apache.zookeeper.ClientCnxn          : Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect

java.net.ConnectException: Connection refused
    at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
    at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
    at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)
    at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1081)

2015-05-06 21:45:15.291  INFO 13562 --- [caldomain:2181)] org.apache.zookeeper.ClientCnxn          : Opening socket connection to server localhost.localdomain/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)
2015-05-06 21:45:15.293  WARN 13562 --- [caldomain:2181)] org.apache.zookeeper.ClientCnxn          : Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect

java.net.ConnectException: Connection refused
    at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
    at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
    at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)
    at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1081)