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When using docker slaves on Amazon EC2 Container Service, the slave tasks aren't being cleaned up properly.
It says the referenced task was not found but when looking at the AWS Console, the tasks are shown with the correct UUIDs.
The following stack trace occurs when a project completes building on a docker slave:
INFO: Slave ecs-cloud-93f834832c1 - Slave Task Started : arn:aws:ecs:eu-west-1:xxxxxxxxxxxx:task/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
Feb 11, 2016 2:29:49 PM hudson.TcpSlaveAgentListener$ConnectionHandler run
INFO: Accepted connection #13 from /10.0.0.219:35968
Feb 11, 2016 2:29:51 PM com.cloudbees.jenkins.plugins.amazonecs.ECSCloud$ProvisioningCallback call
INFO: ECS Slave ecs-cloud-93f834832c1 (ecs task arn:aws:ecs:eu-west-1:xxxxxxxxxxxx:task/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx) connected
Feb 11, 2016 2:29:52 PM hudson.model.Run execute
INFO: ecs-test #3 main build action completed: SUCCESS
Feb 11, 2016 2:29:52 PM com.cloudbees.jenkins.plugins.amazonecs.ECSCloud deleteTask
INFO: Delete ECS Slave task: arn:aws:ecs:eu-west-1:xxxxxxxxxxxx:task/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
Feb 11, 2016 2:29:52 PM com.cloudbees.jenkins.plugins.amazonecs.ECSCloud deleteTask
SEVERE: Couldn't stop task arn arn:aws:ecs:eu-west-1:xxxxxxxxxxxx:task/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx caught exception: The referenced task was not found. (Service: AmazonECS; Status Code: 400; Error Code: ClientException; Request ID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx)
com.amazonaws.services.ecs.model.ClientException: The referenced task was not found. (Service: AmazonECS; Status Code: 400; Error Code: ClientException; Request ID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx)
at com.amazonaws.http.AmazonHttpClient.handleErrorResponse(AmazonHttpClient.java:1275)
at com.amazonaws.http.AmazonHttpClient.executeOneRequest(AmazonHttpClient.java:873)
at com.amazonaws.http.AmazonHttpClient.executeHelper(AmazonHttpClient.java:576)
at com.amazonaws.http.AmazonHttpClient.doExecute(AmazonHttpClient.java:362)
at com.amazonaws.http.AmazonHttpClient.executeWithTimer(AmazonHttpClient.java:328)
at com.amazonaws.http.AmazonHttpClient.execute(AmazonHttpClient.java:307)
at com.amazonaws.services.ecs.AmazonECSClient.invoke(AmazonECSClient.java:2220)
at com.amazonaws.services.ecs.AmazonECSClient.stopTask(AmazonECSClient.java:1807)
at com.cloudbees.jenkins.plugins.amazonecs.ECSCloud.deleteTask(ECSCloud.java:212)
at com.cloudbees.jenkins.plugins.amazonecs.ECSSlave._terminate(ECSSlave.java:90)
at hudson.slaves.AbstractCloudSlave.terminate(AbstractCloudSlave.java:67)
at com.cloudbees.jenkins.plugins.amazonecs.ECSComputer.terminate(ECSComputer.java:62)
at com.cloudbees.jenkins.plugins.amazonecs.ECSComputer.taskCompleted(ECSComputer.java:47)
at hudson.model.queue.WorkUnitContext.synchronizeEnd(WorkUnitContext.java:145)
at hudson.model.Executor.finish1(Executor.java:460)
at hudson.model.Executor.run(Executor.java:430)
Feb 11, 2016 2:29:52 PM hudson.remoting.AbstractByteArrayCommandTransport$1 handle
WARNING: Failed to construct Command
java.io.EOFException
at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2335)
at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:2804)
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:802)
at java.io.ObjectInputStream.<init>(ObjectInputStream.java:299)
at hudson.remoting.ObjectInputStreamEx.<init>(ObjectInputStreamEx.java:48)
at hudson.remoting.AbstractByteArrayCommandTransport$1.handle(AbstractByteArrayCommandTransport.java:61)
at org.jenkinsci.remoting.nio.NioChannelHub$2.run(NioChannelHub.java:594)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at hudson.remoting.SingleLaneExecutorService$1.run(SingleLaneExecutorService.java:112)
at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
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