Jenkins log when docker-test1 and docker-test2 DOES NOT run in parallel:
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Nov 04, 2016 11:12:37 AM com.nirima.jenkins.plugins.docker.DockerCloud provision
INFO: Asked to provision 1 slave(s) for: docker-slave
Nov 04, 2016 11:12:37 AM com.nirima.jenkins.plugins.docker.DockerCloud provision
INFO: Will provision 'kkm', for label: 'docker-slave', in cloud: 'docker'
Nov 04, 2016 11:12:37 AM com.nirima.jenkins.plugins.docker.DockerCloud addProvisionedSlave
INFO: Provisioning 'kkm' number '0' on 'docker'; Total containers: '1'
Nov 04, 2016 11:12:37 AM hudson.slaves.NodeProvisioner$StandardStrategyImpl apply
INFO: Started provisioning Image of kkm from docker with 1 executors. Remaining excess workload: 0
Nov 04, 2016 11:12:37 AM com.nirima.jenkins.plugins.docker.DockerCloud provisionWithWait
INFO: Trying to run container for kkm
Nov 04, 2016 11:12:38 AM com.nirima.jenkins.plugins.docker.utils.PortUtils$ConnectionCheckSSH execute
INFO: SSH port is open on *.*.*.*:32789
Nov 04, 2016 11:12:38 AM com.nirima.jenkins.plugins.docker.launcher.DockerComputerSSHLauncher getSSHLauncher
INFO: Creating slave SSH launcher for /*.*.*.*:32789
Nov 04, 2016 11:12:42 AM hudson.slaves.NodeProvisioner$2 run
INFO: Image of kkm provisioning successfully completed. We have now 2 computer(s)
[11/04/16 11:12:45] SSH Launch of docker-a7fe4203298a on *.*.*.* completed in 2,759 ms
Nov 04, 2016 11:13:00 AM hudson.model.Run execute
INFO: docker-test1 #24 main build action completed: SUCCESS
Nov 04, 2016 11:13:00 AM com.nirima.jenkins.plugins.docker.DockerSlave _terminate
INFO: Disconnected computer
Nov 04, 2016 11:13:00 AM com.nirima.jenkins.plugins.docker.DockerSlave _terminate
INFO: Stopped container a7fe4203298af641df4aaca6cf0dba30d810259dcab8bf522c206b1d985a8137
Nov 04, 2016 11:13:00 AM com.nirima.jenkins.plugins.docker.DockerSlave _terminate
INFO: Shutdowned slave for a7fe4203298af641df4aaca6cf0dba30d810259dcab8bf522c206b1d985a8137
Nov 04, 2016 11:13:00 AM com.nirima.jenkins.plugins.docker.DockerSlave _terminate
INFO: Removed container a7fe4203298af641df4aaca6cf0dba30d810259dcab8bf522c206b1d985a8137
Nov 04, 2016 11:13:02 AM com.nirima.jenkins.plugins.docker.DockerCloud provision
INFO: Asked to provision 1 slave(s) for: docker-slave
Nov 04, 2016 11:13:02 AM com.nirima.jenkins.plugins.docker.DockerCloud provision
INFO: Will provision 'kkm', for label: 'docker-slave', in cloud: 'docker'
Nov 04, 2016 11:13:02 AM com.nirima.jenkins.plugins.docker.DockerCloud addProvisionedSlave
INFO: Provisioning 'kkm' number '0' on 'docker'; Total containers: '1'
Nov 04, 2016 11:13:02 AM hudson.slaves.NodeProvisioner$StandardStrategyImpl apply
INFO: Started provisioning Image of kkm from docker with 1 executors. Remaining excess workload: 0
Nov 04, 2016 11:13:02 AM com.nirima.jenkins.plugins.docker.DockerCloud provisionWithWait
INFO: Trying to run container for kkm
Nov 04, 2016 11:13:03 AM com.nirima.jenkins.plugins.docker.utils.PortUtils$ConnectionCheckSSH execute
INFO: SSH port is open on *.*.*.*:32790
Nov 04, 2016 11:13:03 AM com.nirima.jenkins.plugins.docker.launcher.DockerComputerSSHLauncher getSSHLauncher
INFO: Creating slave SSH launcher for /*.*.*.*:32790
Nov 04, 2016 11:13:12 AM hudson.slaves.NodeProvisioner$2 run
INFO: Image of kkm provisioning successfully completed. We have now 2 computer(s)
[11/04/16 11:13:15] SSH Launch of docker-2debf3177a4f on *.*.*.* completed in 2,757 ms
Nov 04, 2016 11:13:30 AM hudson.model.Run execute
INFO: docker-test2 #10 main build action completed: SUCCESS
Nov 04, 2016 11:13:30 AM com.nirima.jenkins.plugins.docker.DockerSlave _terminate
INFO: Disconnected computer
Nov 04, 2016 11:13:30 AM hudson.remoting.SynchronousCommandTransport$ReaderThread run
SEVERE: I/O error in channel docker-2debf3177a4f
java.io.IOException: Unexpected termination of the channel
	at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:73)
Caused by: java.io.EOFException
	at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2353)
	at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:2822)
	at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:804)
	at java.io.ObjectInputStream.<init>(ObjectInputStream.java:301)
	at hudson.remoting.ObjectInputStreamEx.<init>(ObjectInputStreamEx.java:48)
	at hudson.remoting.AbstractSynchronousByteArrayCommandTransport.read(AbstractSynchronousByteArrayCommandTransport.java:34)
	at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:59)

Nov 04, 2016 11:13:30 AM com.nirima.jenkins.plugins.docker.DockerSlave _terminate
INFO: Stopped container 2debf3177a4fe63dd0b5f4fd32c8c730729423e538f8540900b3f96e3e102f6e
Nov 04, 2016 11:13:30 AM com.nirima.jenkins.plugins.docker.DockerSlave _terminate
INFO: Shutdowned slave for 2debf3177a4fe63dd0b5f4fd32c8c730729423e538f8540900b3f96e3e102f6e
Nov 04, 2016 11:13:30 AM com.nirima.jenkins.plugins.docker.DockerSlave _terminate
INFO: Removed container 2debf3177a4fe63dd0b5f4fd32c8c730729423e538f8540900b3f96e3e102f6e