tomcat启动完了之后，一直不停的打印这种错误信息，看表面上，应该是zk节点下的数据是空的，连接不上服务，所以一直在尝试连接，然后一直又连不上；
完整的错误信息：
407662 [usf-ZooKeeper:dsf_default-Registry-SendThread(127.0.0.1:2181)] INFO org.apache.zookeeper.ClientCnxn - Opening socket connection to server 127.0.0.1/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error) 407662 [usf-ZooKeeper:dsf_default-Registry-SendThread(127.0.0.1:2181)] WARN org.apache.zookeeper.ClientCnxn - Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect java.net.ConnectException: 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$SendThread.run(ClientCnxn.java:1081) 408763 [usf-ZooKeeper:dsf_default-Registry-SendThread(127.0.0.1:2181)] INFO org.apache.zookeeper.ClientCnxn - Opening socket connection to server 127.0.0.1/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error) 408763 [usf-ZooKeeper:dsf_default-Registry-SendThread(127.0.0.1:2181)] WARN org.apache.zookeeper.ClientCnxn - Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect java.net.ConnectException: at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717) at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361) at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1081) 409864 [usf-ZooKeeper:dsf_default-Registry-SendThread(127.0.0.1:2181)] INFO org.apache.zookeeper.ClientCnxn - Opening socket connection to server 127.0.0.1/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error) 409864 [usf-ZooKeeper:dsf_default-Registry-SendThread(127.0.0.1:2181)] WARN org.apache.zookeeper.ClientCnxn - Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect java.net.ConnectException: 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$SendThread.run(ClientCnxn.java:1081) 410965 [usf-ZooKeeper:dsf_default-Registry-SendThread(127.0.0.1:2181)] INFO org.apache.zookeeper.ClientCnxn - Opening socket connection to server 127.0.0.1/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error) 410965 [usf-ZooKeeper:dsf_default-Registry-SendThread(127.0.0.1:2181)] WARN org.apache.zookeeper.ClientCnxn - Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect java.net.ConnectException: at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717) at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361) at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1081) 412066 [usf-ZooKeeper:dsf_default-Registry-SendThread(127.0.0.1:2181)] INFO org.apache.zookeeper.ClientCnxn - Opening socket connection to server 127.0.0.1/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error) 412066 [usf-ZooKeeper:dsf_default-Registry-SendThread(127.0.0.1:2181)] WARN org.apache.zookeeper.ClientCnxn - Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect java.net.ConnectException: 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$SendThread.run(ClientCnxn.java:1081) 413167 [usf-ZooKeeper:dsf_default-Registry-SendThread(127.0.0.1:2181)] INFO org.apache.zookeeper.ClientCnxn - Opening socket connection to server 127.0.0.1/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error) 413167 [usf-ZooKeeper:dsf_default-Registry-SendThread(127.0.0.1:2181)] WARN org.apache.zookeeper.ClientCnxn - Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect java.net.ConnectException: at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717) at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361) at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1081)
原因：又是为了一己之私，省事儿，把服务上的WEB-INFO无情删除，然后用jenkins打包后，就一直有这个问题了，很无奈，找了个大牛给瞅了瞅，说zk一直在尝试连我本地的zk，说明服务上是不是少了一些zk的配置文件呢？大牛给了我提示，我就去classes下看配置文件，和本地的对比了下，果然，少了一个dsf.properties的配置文件，里面就有zk的一些配置，然后手动把这个配置文件给添加到服务上，重启了下，启动成功了！原来这个配置文件是通过提交checklist手动添加的，jenkins不会自动的给打进去，导致了这个尴尬的问题，不过好歹解决了，心里还是松了一口气的！
配置文件内容如下，应该都是一些dsf的配置项：
############################################ # DSF Core Configuration ############################################ # dsf app name, keep unique in distributed system dsf.appname=duiba # dsf global service timeout in millis dsf.service.timeout=10000 # core size for dsf handle service request thread pool dsf.worker.core.size=20 # max size for dsf handle service request thread pool dsf.worker.max.size=40 # queue size for dsf handler service request thread pool dsf.worker.queues=1000 logTraceSwitch=true ############################################ # DSF Default trace switch ############################################ dsf.trace.switch=true dsf.sampleRate=1 ############################################ # DSF Fail Policy Configuration ############################################ # dsf request fail policy dsf.service.failpolicy=failover ############################################ # DSF Fail Over Policy Configuration ############################################ dsf.resend.times=3 # dsf timeout configuraion dsf.client.request.resend.interval=5 dsf.client.request.resend.times=0 ############################################ # DSF Registry Configuration ############################################ dsf.registry.name=zk dsf.registry.default=zk ############################################ # DSF ZK Registry Configuration ############################################ dsf.registry.zk.type=zookeeper dsf.registry.zk.connector=DsfZKClient ############################################ # DSF Protocol Configuration ############################################ dsf.protocol.name=dsf dsf.protocol.default=dsf ############################################ #dsf statistics center switch #default: false dsf.statistics.switch=false ############################################ # DSF TCP Protocol Configuration ############################################ # dsf tcp protocol type dsf.protocol.tcp.type=dsf # dsf tcp protocol listen address,this address must be server address dsf.protocol.tcp.address=192.168.177.66:22206 #dsf.protocol.tcp.address=10.73.158.171:22106 # max size for dsf tcp protocol acceptor thread pool dsf.protocol.tcp.threads=1 # queue size for dsf tcp protocol acceptor thread pool dsf.protocol.tcp.accepts=100 # max size for dsf tcp protocol io thread pool dsf.protocol.tcp.iothreads=20 # queue size for dsf tcp protocol io thread pool dsf.protocol.tcp.queues=1000000 # async request waiting quque size for dsf tcp protocol dsf.protocol.tcp.async.queues=800000 # determine whether dsf tcp protocol iplimit enabled dsf.protocol.tcp.iplimit.enable=false # dsf tcp protocol iplimit whiltelist #dsf.protocol.tcp.iplimit.whitelist=* # dsf tcp protocol iplimit blacklist #dsf.protocol.tcp.iplimit.blacklist= # dsf tcp protocol heartbeat interval in seconds dsf.protocol.tcp.heartbeat.interval=5 # dsf tcp protocol heartbeat lost count dsf.protocol.tcp.heartbeat.lostcount=5 # max size for dsf tcp protocol client io thread pool dsf.protocol.tcp.client.iothreads=1 # queue size for dsf tcp protocol client io thread pool dsf.protocol.tcp.client.queues=100000 # dsf tcp protocol client reconnect interval in seconds dsf.protocol.tcp.client.reconnect.interval=3 # dsf tcp protocol client first connect wait time in millis dsf.protocol.tcp.client.connect.firstwait=2000 ############################################ # DSF Statistic Configuration ############################################ dsf.statistic.delay.enable=false ############################################ # DSF Monitor Configuration ############################################ # dsf time delay monitor time interval in seconds dsf.monitor.time.interval=30 ############################################ # DSF Default Route Policy ############################################ # dsf global route policy, available: poll, random, serviceDelayTimeRouter dsf.router.default=poll dsf.router.poll.localpriority=false ##USF config zk.server.url=10.211.95.114:6830 zk.session.timeout=50000 rpc.address=192.168.177.66:28914 shutdown.graceful.wait.timeout=60000 slow.service.open=true slow.service.client.time=500 slow.service.server.time=400 ##updata to dsf3.0 add begin # DSF threadpool monitor config threadpool.monitor.switch=true # unit(s) threadpool.monitor.interval=30 dsf.application=duiba #is need auth when zk client connect zk server,on|off zk.auth.switch=off zk.auth.dir= #is need auth when dsf client connect dsf server,true|false dsf.authentication.enable=false dsf.rpc.login.identity= ##updata to dsf3.0 add end