Sdk 偶尔出现错误o.k.k.s.common.zk.ControlNodeTracker-KAA服务器上出现未知错误

为了让您了解背景，我们正在ubuntu上运行kaa服务器，并将MongoDB与之结合，并将端点连接到它（最多10个）。显然，我在我们的服务器上经常看到以下错误，这使得我们的Kaa客户机（C客户机）抛出一个段错误

我们发现的解决方法是在服务器上重新启动kaa节点服务。 我们正计划推出具有物联网功能的产品，对此我们感到担忧

有人能告诉我们可能出了什么问题吗

我知道问题出在zookeeper上，看起来它找不到操作服务器

2017-05-11 12:31:23,808 [EPS-core-dispatcher-208419] DEBUG o.k.k.s.o.s.a.a.core.TenantActor - [f8d64123-6861-446f-b937-1e1d398159c8] Processing status request
2017-05-11 12:31:23,808 [EPS-core-dispatcher-208419] TRACE o.k.k.s.o.s.a.a.c.ApplicationActor - [26309946599256320307] Received: org.kaaproject.kaa.server.operations.service.akka.messages.core.stats.StatusRequestMessage@fb460fe
2017-05-11 12:31:23,808 [EPS-core-dispatcher-208419] DEBUG o.k.k.s.o.s.a.a.c.ApplicationActor - [f8d64123-6861-446f-b937-1e1d398159c8] Processing status request
2017-05-11 12:31:23,808 [EPS-core-dispatcher-208419] TRACE o.k.k.s.o.s.a.a.core.TenantActor - [1] Received: org.kaaproject.kaa.server.operations.service.akka.messages.core.stats.ApplicationActorStatusResponse@4ab6ff6c
2017-05-11 12:31:23,808 [EPS-core-dispatcher-208419] DEBUG o.k.k.s.o.s.a.a.c.OperationsServerActor - Received: org.kaaproject.kaa.server.operations.service.akka.messages.core.stats.TenantActorStatusResponse@2fc38dcf
2017-05-11 12:31:23,813 [pool-5-thread-1] ERROR o.k.k.s.common.zk.ControlNodeTracker - Unknown Error
org.apache.zookeeper.KeeperException$NoNodeException: KeeperErrorCode = NoNode for /operationsServerNodes/operationsServerNodes0000000021
        at org.apache.zookeeper.KeeperException.create(KeeperException.java:111) ~[zookeeper-3.4.6.jar:3.4.6-1569965]
        at org.apache.zookeeper.KeeperException.create(KeeperException.java:51) ~[zookeeper-3.4.6.jar:3.4.6-1569965]
        at org.apache.zookeeper.ZooKeeper.setData(ZooKeeper.java:1270) ~[zookeeper-3.4.6.jar:3.4.6-1569965]
        at org.apache.curator.framework.imps.SetDataBuilderImpl$4.call(SetDataBuilderImpl.java:274) ~[curator-framework-2.9.0.jar:na]
        at org.apache.curator.framework.imps.SetDataBuilderImpl$4.call(SetDataBuilderImpl.java:270) ~[curator-framework-2.9.0.jar:na]
        at org.apache.curator.RetryLoop.callWithRetry(RetryLoop.java:107) ~[curator-client-2.9.0.jar:na]
        at org.apache.curator.framework.imps.SetDataBuilderImpl.pathInForeground(SetDataBuilderImpl.java:267) ~[curator-framework-2.9.0.jar:na]
        at org.apache.curator.framework.imps.SetDataBuilderImpl.forPath(SetDataBuilderImpl.java:253) ~[curator-framework-2.9.0.jar:na]
        at org.apache.curator.framework.imps.SetDataBuilderImpl.forPath(SetDataBuilderImpl.java:41) ~[curator-framework-2.9.0.jar:na]
        at org.kaaproject.kaa.server.common.zk.operations.OperationsNode$1.doWithZkClient(OperationsNode.java:78) ~[zk-0.10.0.jar:na]
        at org.kaaproject.kaa.server.common.zk.ControlNodeTracker.doZkClientAction(ControlNodeTracker.java:294) [zk-0.10.0.jar:na]
        at org.kaaproject.kaa.server.common.zk.ControlNodeTracker.doZkClientAction(ControlNodeTracker.java:280) [zk-0.10.0.jar:na]
        at org.kaaproject.kaa.server.common.zk.operations.OperationsNode.updateNodeData(OperationsNode.java:75) [zk-0.10.0.jar:na]
        at org.kaaproject.kaa.server.operations.service.loadbalance.DefaultLoadBalancingService.onStatusUpdate(DefaultLoadBalancingService.java:98) [kaa-node-0.10.0.jar:na]
        at org.kaaproject.kaa.server.operations.service.loadbalance.DefaultLoadBalancingService$1$1.run(DefaultLoadBalancingService.java:72) [kaa-node-0.10.0.jar:na]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_60]

以下是此特定错误的频率（文件名：错误发生次数）

---

请注意：“紧急”只会让用户放弃投票，继续前进。这里没有人关心你的优先事项：（哦，对不起。我在google group上发布它只是为了意识到它需要发布在StackOverflow上。我无意以任何方式提出要求。我应该小心！注意：'紧急'只会让用户投下否决票并继续前进。这里没有人关心你的优先事项：（哦，对不起。我把它贴在谷歌集团上只是为了意识到它需要贴在StackOverflow上。我无意以任何方式提出要求。我应该小心！

kaa-node-2017-05-10.0.log:0
kaa-node-2017-05-10.1.log:0
kaa-node-2017-05-10.2.log:0
kaa-node-2017-05-10.3.log:0
kaa-node-2017-05-10.4.log:0
kaa-node-2017-05-10.5.log:0
kaa-node-2017-05-10.6.log:0
kaa-node-2017-05-10.7.log:0
kaa-node-2017-05-11.0.log:0
kaa-node-2017-05-11.1.log:0
kaa-node-2017-05-11.2.log:0
kaa-node-2017-05-11.3.log:0
kaa-node-2017-05-11.4.log:520
kaa-node-2017-05-11.5.log:0
kaa-node-2017-05-11.6.log:0
kaa-node-2017-05-11.7.log:0
kaa-node-2017-05-11.8.log:0
kaa-node-2017-05-12.0.log:0
kaa-node-2017-05-12.1.log:0
kaa-node-2017-05-12.2.log:0
kaa-node-2017-05-12.3.log:0
kaa-node-2017-05-12.4.log:0
kaa-node-2017-05-12.5.log:0
kaa-node-2017-05-12.6.log:0
kaa-node-2017-05-13.0.log:0
kaa-node-2017-05-13.1.log:0
kaa-node-2017-05-13.2.log:0
kaa-node-2017-05-13.3.log:0
kaa-node-2017-05-13.4.log:0
kaa-node-2017-05-13.5.log:0
kaa-node-2017-05-13.6.log:0
kaa-node-2017-05-13.7.log:0
kaa-node-2017-05-14.0.log:0
kaa-node-2017-05-14.1.log:0
kaa-node-2017-05-14.2.log:0
kaa-node-2017-05-14.3.log:0
kaa-node-2017-05-14.4.log:0
kaa-node-2017-05-14.5.log:0
kaa-node-2017-05-14.6.log:0
kaa-node-2017-05-14.7.log:0
kaa-node-2017-05-14.8.log:0
kaa-node-2017-05-14.9.log:0
kaa-node-2017-05-15.0.log:0
kaa-node-2017-05-15.1.log:0
kaa-node-2017-05-15.2.log:0
kaa-node-2017-05-15.3.log:0
kaa-node-2017-05-15.4.log:0
kaa-node-2017-05-15.5.log:0
kaa-node-2017-05-15.6.log:276
kaa-node-2017-05-15.7.log:875
kaa-node-2017-05-15.8.log:873
kaa-node-2017-05-15.9.log:539
kaa-node-2017-05-16.0.log:879
kaa-node-2017-05-16.1.log:878
kaa-node-2017-05-16.2.log:878
kaa-node-2017-05-16.3.log:878
kaa-node-2017-05-16.4.log:879
kaa-node-2017-05-16.5.log:880
kaa-node-2017-05-16.6.log:877
kaa-node-2017-05-16.7.log:878
kaa-node-2017-05-16.8.log:878
kaa-node-2017-05-16.9.log:735
kaa-node-2017-05-17.0.log:877
kaa-node-2017-05-17.1.log:878
kaa-node-2017-05-17.2.log:878
kaa-node-2017-05-17.3.log:878
kaa-node-2017-05-17.4.log:877
kaa-node-2017-05-17.5.log:876
kaa-node-2017-05-17.6.log:871
kaa-node-2017-05-17.7.log:868
kaa-node-2017-05-17.8.log:877
kaa-node-2017-05-17.9.log:760
kaa-node-2017-05-18.0.log:876
kaa-node-2017-05-18.1.log:876
kaa-node-2017-05-18.2.log:876
kaa-node-2017-05-18.3.log:876
kaa-node-2017-05-18.4.log:877
kaa-node-2017-05-18.5.log:880
kaa-node-2017-05-18.6.log:879
kaa-node-2017-05-18.7.log:878
kaa-node-2017-05-18.8.log:876
kaa-node-2017-05-18.9.log:746
kaa-node-2017-05-19.0.log:876
kaa-node-2017-05-19.1.log:877
kaa-node-2017-05-19.2.log:877
kaa-node-2017-05-19.3.log:879
kaa-node-2017-05-19.4.log:878
kaa-node-2017-05-19.5.log:879
kaa-node-2017-05-19.6.log:1037
kaa-node-2017-05-19.7.log:1285
kaa-node-2017-05-19.8.log:1051
kaa-node-2017-05-20.0.log:1887
kaa-node-2017-05-20.1.log:2400
kaa-node-2017-05-20.2.log:2396
kaa-node-2017-05-20.3.log:1957
kaa-node-2017-05-21.0.log:8640
kaa-node-2017-05-22.0.log:5326
kaa-node-2017-05-22.1.log:0
kaa-node-2017-05-22.2.log:0
kaa-node-2017-05-22.3.log:0
kaa-node-2017-05-22.4.log:0
kaa-node-2017-05-23.0.log:0
kaa-node-2017-05-23.1.log:0