Flink HA群集JobManager问题

Question

我有一个Flink1.2集群的设置，由3个JobManagers和2个TaskManagers组成。我从JobManager1启动Zookeeper仲裁，我确认Zookeeper在另外两个JobManagers上启动，然后我在这个JobManager1上启动一个闪烁作业。

在所有5个虚拟机上，flink-conf.yaml都是相同的，这意味着jobmanager.rpc.address:指向JobManager1 everywhere。

如果我关闭了运行JobManager1的虚拟机，我希望Zookeeper会说剩下的JobManagers中的一个是领导者，TaskManagers应该重新连接到它。相反，我在TaskManagers的日志中看到了很多这样的消息

2017-03-14 14:13:21,827 INFO  org.apache.flink.runtime.taskmanager.TaskManager              - Trying to register at JobManager akka.tcp://flink@1.2.3.4:43660/user/jobmanager (attempt 11, timeout: 30 seconds)
2017-03-14 14:13:21,836 WARN  akka.remote.ReliableDeliverySupervisor                        - Association with remote system [akka.tcp://flink@1.2.3.4:43660] has failed, address is now gated for [5000] ms. Reason: [Association failed with [akka.tcp://flink@1.2.3.4:43660]] Caused by: [Connection refused: /1.2.3.4:43660]

出于保密考虑，我将原始IP修改为1.2.3.4，因为它始终是(JobManager1的)相同的IP。

更多日志：

2017-03-15 10:28:28,655 INFO  org.apache.flink.core.fs.FileSystem                           - Ensuring all FileSystem streams are closed for Async calls on Source: Custom Source -> Flat Map (1/1)
2017-03-15 10:28:38,534 WARN  akka.remote.ReliableDeliverySupervisor                        - Association with remote system [akka.tcp://flink@1.2.3.4:44779] has failed, address is now gated for [5000] ms. Reason: [Disassociated] 
2017-03-15 10:28:46,606 WARN  akka.remote.ReliableDeliverySupervisor                        - Association with remote system [akka.tcp://flink@1.2.3.4:44779] has failed, address is now gated for [5000] ms. Reason: [Association failed with [akka.tcp://flink@1.2.3.4:44779]] Caused by: [Connection refused: /1.2.3.4:44779]
2017-03-15 10:28:52,431 WARN  akka.remote.ReliableDeliverySupervisor                        - Association with remote system [akka.tcp://flink@1.2.3.4:44779] has failed, address is now gated for [5000] ms. Reason: [Association failed with [akka.tcp://flink@1.2.3.4:44779]] Caused by: [Connection refused: /1.2.3.4:44779]
2017-03-15 10:29:02,435 WARN  akka.remote.ReliableDeliverySupervisor                        - Association with remote system [akka.tcp://flink@1.2.3.4:44779] has failed, address is now gated for [5000] ms. Reason: [Association failed with [akka.tcp://flink@1.2.3.4:44779]] Caused by: [Connection refused: /1.2.3.4:44779]
2017-03-15 10:29:10,489 INFO  org.apache.flink.runtime.taskmanager.TaskManager              - TaskManager akka://flink/user/taskmanager disconnects from JobManager akka.tcp://flink@1.2.3.4:44779/user/jobmanager: Old JobManager lost its leadership.
2017-03-15 10:29:10,490 INFO  org.apache.flink.runtime.taskmanager.TaskManager              - Cancelling all computations and discarding all cached data.
2017-03-15 10:29:10,491 INFO  org.apache.flink.runtime.taskmanager.Task                     - Attempting to fail task externally Source: Custom Source -> Flat Map (1/1) (75fd495cc6acfd72fbe957e60e513223).
2017-03-15 10:29:10,491 INFO  org.apache.flink.runtime.taskmanager.Task                     - Source: Custom Source -> Flat Map (1/1) (75fd495cc6acfd72fbe957e60e513223) switched from RUNNING to FAILED.
java.lang.Exception: TaskManager akka://flink/user/taskmanager disconnects from JobManager akka.tcp://flink@1.2.3.4:44779/user/jobmanager: Old JobManager lost its leadership.
    at org.apache.flink.runtime.taskmanager.TaskManager.handleJobManagerDisconnect(TaskManager.scala:1074)
    at org.apache.flink.runtime.taskmanager.TaskManager.org$apache$flink$runtime$taskmanager$TaskManager$$handleJobManagerLeaderAddress(TaskManager.scala:1426)
    at org.apache.flink.runtime.taskmanager.TaskManager$$anonfun$handleMessage$1.applyOrElse(TaskManager.scala:286)
    at scala.runtime.AbstractPartialFunction.apply(AbstractPartialFunction.scala:36)
    at org.apache.flink.runtime.LeaderSessionMessageFilter$$anonfun$receive$1.applyOrElse(LeaderSessionMessageFilter.scala:44)
    at scala.runtime.AbstractPartialFunction.apply(AbstractPartialFunction.scala:36)
    at org.apache.flink.runtime.LogMessages$$anon$1.apply(LogMessages.scala:33)
    at org.apache.flink.runtime.LogMessages$$anon$1.apply(LogMessages.scala:28)
    at scala.PartialFunction$class.applyOrElse(PartialFunction.scala:123)
    at org.apache.flink.runtime.LogMessages$$anon$1.applyOrElse(LogMessages.scala:28)
    at akka.actor.Actor$class.aroundReceive(Actor.scala:467)
    at org.apache.flink.runtime.taskmanager.TaskManager.aroundReceive(TaskManager.scala:122)
    at akka.actor.ActorCell.receiveMessage(ActorCell.scala:516)
    at akka.actor.ActorCell.invoke(ActorCell.scala:487)
    at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:238)
    at akka.dispatch.Mailbox.run(Mailbox.scala:220)
    at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:397)
    at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
    at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
    at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
    at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
2017-03-15 10:29:10,512 INFO  org.apache.flink.runtime.taskmanager.Task                     - Triggering cancellation of task code Source: Custom Source -> Flat Map (1/1) (75fd495cc6acfd72fbe957e60e513223).
2017-03-15 10:29:10,515 INFO  org.apache.flink.runtime.taskmanager.Task                     - Attempting to fail task externally Flat Map (1/1) (dd555e0437867c3180a1ecaf0a9f4d04).
2017-03-15 10:29:10,515 INFO  org.apache.flink.runtime.taskmanager.Task                     - Flat Map (1/1) (dd555e0437867c3180a1ecaf0a9f4d04) switched from RUNNING to FAILED.
java.lang.Exception: TaskManager akka://flink/user/taskmanager disconnects from JobManager akka.tcp://flink@1.2.3.4:44779/user/jobmanager: Old JobManager lost its leadership.
    at org.apache.flink.runtime.taskmanager.TaskManager.handleJobManagerDisconnect(TaskManager.scala:1074)
    at org.apache.flink.runtime.taskmanager.TaskManager.org$apache$flink$runtime$taskmanager$TaskManager$$handleJobManagerLeaderAddress(TaskManager.scala:1426)
    at org.apache.flink.runtime.taskmanager.TaskManager$$anonfun$handleMessage$1.applyOrElse(TaskManager.scala:286)
    at scala.runtime.AbstractPartialFunction.apply(AbstractPartialFunction.scala:36)
    at org.apache.flink.runtime.LeaderSessionMessageFilter$$anonfun$receive$1.applyOrElse(LeaderSessionMessageFilter.scala:44)
    at scala.runtime.AbstractPartialFunction.apply(AbstractPartialFunction.scala:36)
    at org.apache.flink.runtime.LogMessages$$anon$1.apply(LogMessages.scala:33)
    at org.apache.flink.runtime.LogMessages$$anon$1.apply(LogMessages.scala:28)
    at scala.PartialFunction$class.applyOrElse(PartialFunction.scala:123)
    at org.apache.flink.runtime.LogMessages$$anon$1.applyOrElse(LogMessages.scala:28)
    at akka.actor.Actor$class.aroundReceive(Actor.scala:467)
    at org.apache.flink.runtime.taskmanager.TaskManager.aroundReceive(TaskManager.scala:122)
    at akka.actor.ActorCell.receiveMessage(ActorCell.scala:516)
    at akka.actor.ActorCell.invoke(ActorCell.scala:487)
    at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:238)
    at akka.dispatch.Mailbox.run(Mailbox.scala:220)
    at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:397)
    at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
    at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
    at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
    at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
2017-03-15 10:29:10,516 INFO  org.apache.flink.runtime.taskmanager.Task                     - Triggering cancellation of task code Flat Map (1/1) (dd555e0437867c3180a1ecaf0a9f4d04).
2017-03-15 10:29:10,516 INFO  org.apache.flink.runtime.taskmanager.TaskManager              - Disassociating from JobManager
2017-03-15 10:29:10,525 INFO  org.apache.flink.runtime.blob.BlobCache                       - Shutting down BlobCache
2017-03-15 10:29:10,542 WARN  akka.remote.ReliableDeliverySupervisor                        - Association with remote system [akka.tcp://flink@1.2.3.4:44779] has failed, address is now gated for [5000] ms. Reason: [Association failed with [akka.tcp://flink@1.2.3.4:44779]] Caused by: [Connection refused: /1.2.3.4:44779]
2017-03-15 10:29:10,546 INFO  org.apache.flink.runtime.taskmanager.Task                     - Freeing task resources for Source: Custom Source -> Flat Map (1/1) (75fd495cc6acfd72fbe957e60e513223).
2017-03-15 10:29:10,548 INFO  org.apache.flink.runtime.taskmanager.Task                     - Freeing task resources for Flat Map (1/1) (dd555e0437867c3180a1ecaf0a9f4d04).
2017-03-15 10:29:10,551 INFO  org.apache.flink.core.fs.FileSystem                           - Ensuring all FileSystem streams are closed for Flat Map (1/1)
2017-03-15 10:29:10,552 INFO  org.apache.flink.runtime.taskmanager.TaskManager              - Trying to register at JobManager akka.tcp://flink@1.2.3.5:43893/user/jobmanager (attempt 1, timeout: 500 milliseconds)
2017-03-15 10:29:10,567 INFO  org.apache.flink.core.fs.FileSystem                           - Ensuring all FileSystem streams are closed for Source: Custom Source -> Flat Map (1/1)
2017-03-15 10:29:10,632 INFO  org.apache.flink.runtime.taskmanager.TaskManager              - Successful registration at JobManager (akka.tcp://flink@1.2.3.5:43893/user/jobmanager), starting network stack and library cache.
2017-03-15 10:29:10,633 INFO  org.apache.flink.runtime.taskmanager.TaskManager              - Determined BLOB server address to be /1.2.3.5:42830. Starting BLOB cache.
2017-03-15 10:29:10,633 INFO  org.apache.flink.runtime.blob.BlobCache                       - Created BLOB cache storage directory /tmp/blobStore-d97e08db-d2f1-4f00-a7d1-30c2f5823934
2017-03-15 10:29:15,551 WARN  akka.remote.ReliableDeliverySupervisor                        - Association with remote system [akka.tcp://flink@1.2.3.4:44779] has failed, address is now gated for [5000] ms. Reason: [Association failed with [akka.tcp://flink@1.2.3.4:44779]] Caused by: [Connection refused: /1.2.3.4:44779]
2017-03-15 10:29:20,571 WARN  akka.remote.ReliableDeliverySupervisor                        - Association with remote system [akka.tcp://flink@1.2.3.4:44779] has failed, address is now gated for [5000] ms. Reason: [Association failed with [akka.tcp://flink@1.2.3.4:44779]] Caused by: [Connection refused: /1.2.3.4:44779]
2017-03-15 10:29:25,582 WARN  akka.remote.ReliableDeliverySupervisor                        - Association with remote system [akka.tcp://flink@1.2.3.4:44779] has failed, address is now gated for [5000] ms. Reason: [Association failed with [akka.tcp://flink@1.2.3.4:44779]] Caused by: [Connection refused: /1.2.3.4:44779]
2017-03-15 10:29:30,592 WARN  akka.remote.ReliableDeliverySupervisor                        - Association with remote system [akka.tcp://flink@1.2.3.4:44779] has failed, address is now gated for [5000] ms. Reason: [Association failed with [akka.tcp://flink@1.2.3.4:44779]] Caused by: [Connection refused: /1.2.3.4:44779]

有谁知道为什么TaskManagers不尝试重新连接到剩余的JobManagers之一(如上面的1.2.3.5 )？

谢谢!

Answer 1

对于面临相同问题的每个人，HA要求您提供可从所有节点访问的DFS位置。我让每个虚拟机上的后端状态检查点目录和zookeeper存储目录指向本地文件系统位置，当其中一个JobManagers宕机时，新的领导者无法恢复正在运行的作业，因为缺少信息/位置不可访问。

编辑:由于这个问题，我修改的文件(在Apache Flink 1.2 (https://ci.apache.org/projects/flink/flink-docs-release-1.2/setup/config.html)的情况下)是

conf/flink-conf.yaml

我设置了

state.backend.fs.checkpointdir
high-availability.zookeeper.storageDir

从TaskManagers和JobManagers到亚马逊网络服务S3路径.accessible。