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[Bug 1325560] Re: kvm virtio netdevs lose network connectivity under "enough" load


I believe this is a duplicate of bug 1346917.
A test kernel has been built in comment #1 of that bug. 
Please test with this, if it fixes your issue mark this bug as a duplicate of 1346917.
This fix will make it most likely into linux 3.13.0-33.

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  kvm virtio netdevs lose network connectivity under "enough" load

Status in libvirt virtualization API:
Status in The Linux Kernel:
Status in “linux” package in Ubuntu:
Status in “qemu-kvm” package in Ubuntu:

Bug description:
  Networking breaks after awhile in kvm guests using virtio networking.
  We run data intensive jobs on our virtual cluster (OpenStack Grizzly
  Installed on Ubuntu 12.04 Server).  The job runs fine on a single
  worker VM (no data transfer involved). As soon as I add more nodes
  where the workers need to exchange some data, one of the worker VM
  goes down. Ping responds with 'host unreachable'. Logging in via the
  serial console shows no problems: eth0 is up, can ping the local host,
  but no outside connectivity. Restart the network
  (/etc/init.d/networking restart) does nothing. Reboot the machine and
  it comes alive again.

  14/06/01 18:30:06 INFO YarnClientClusterScheduler: YarnClientClusterScheduler.postStartHook done
  14/06/01 18:30:06 INFO MemoryStore: ensureFreeSpace(190758) called with curMem=0, maxMem=308713881
  14/06/01 18:30:06 INFO MemoryStore: Block broadcast_0 stored as values to memory (estimated size 186.3 KB, free 294.2 MB)
  14/06/01 18:30:06 INFO FileInputFormat: Total input paths to process : 1
  14/06/01 18:30:06 INFO NetworkTopology: Adding a new node: /default-rack/
  14/06/01 18:30:06 INFO NetworkTopology: Adding a new node: /default-rack/
  14/06/01 18:30:06 INFO SparkContext: Starting job: count at hello_spark.py:15
  14/06/01 18:30:06 INFO DAGScheduler: Got job 0 (count at hello_spark.py:15) with 2 output partitions (allowLocal=false)
  14/06/01 18:30:06 INFO DAGScheduler: Final stage: Stage 0 (count at hello_spark.py:15)
  14/06/01 18:30:06 INFO DAGScheduler: Parents of final stage: List()
  14/06/01 18:30:06 INFO DAGScheduler: Missing parents: List()
  14/06/01 18:30:06 INFO DAGScheduler: Submitting Stage 0 (PythonRDD[2] at count at hello_spark.py:15), which has no missing parents
  14/06/01 18:30:07 INFO DAGScheduler: Submitting 2 missing tasks from Stage 0 (PythonRDD[2] at count at hello_spark.py:15)
  14/06/01 18:30:07 INFO YarnClientClusterScheduler: Adding task set 0.0 with 2 tasks
  14/06/01 18:30:08 INFO YarnClientSchedulerBackend: Registered executor: Actor[akka.tcp://sparkExecutor@host-10-20-20-28.novalocal:44417/user/Executor#-1352071582] with ID 1
  14/06/01 18:30:08 INFO TaskSetManager: Starting task 0.0:0 as TID 0 on executor 1: host-10-20-20-28.novalocal (PROCESS_LOCAL)
  14/06/01 18:30:08 INFO TaskSetManager: Serialized task 0.0:0 as 3123 bytes in 14 ms
  14/06/01 18:30:09 INFO BlockManagerMasterActor$BlockManagerInfo: Registering block manager host-10-20-20-28.novalocal:42960 with 588.8 MB RAM
  14/06/01 18:30:16 INFO BlockManagerMasterActor$BlockManagerInfo: Added rdd_1_0 in memory on host-10-20-20-28.novalocal:42960 (size: 308.2 MB, free: 280.7 MB)
  14/06/01 18:30:17 INFO YarnClientSchedulerBackend: Registered executor: Actor[akka.tcp://sparkExecutor@host-10-20-20-23.novalocal:58126/user/Executor#1079893974] with ID 2
  14/06/01 18:30:17 INFO TaskSetManager: Starting task 0.0:1 as TID 1 on executor 2: host-10-20-20-23.novalocal (PROCESS_LOCAL)
  14/06/01 18:30:17 INFO TaskSetManager: Serialized task 0.0:1 as 3123 bytes in 1 ms
  14/06/01 18:30:17 INFO BlockManagerMasterActor$BlockManagerInfo: Registering block manager host-10-20-20-23.novalocal:56776 with 588.8 MB RAM
  fj14/06/01 18:31:20 WARN BlockManagerMasterActor: Removing BlockManager BlockManagerId(1, host-10-20-20-28.novalocal, 42960, 0) with no recent heart beats: 55828ms exceeds 45000ms
  14/06/01 18:42:23 INFO YarnClientSchedulerBackend: Executor 2 disconnected, so removing it
  14/06/01 18:42:23 ERROR YarnClientClusterScheduler: Lost executor 2 on host-10-20-20-23.novalocal: remote Akka client disassociated

  The same job finishes flawlessly on a single worker.

  System Information:

  Description: Ubuntu 12.04.4 LTS
  Release: 12.04

  Linux 3.8.0-35-generic #52~precise1-Ubuntu SMP Thu Jan 30 17:24:40 UTC
  2014 x86_64

    Installed: 1.1.1-0ubuntu8~cloud2
    Candidate: 1.1.1-0ubuntu8.7~cloud1
    Version table:
       1.1.1-0ubuntu8.7~cloud1 0
          500 http://ubuntu-cloud.archive.canonical.com/ubuntu/ precise-updates/havana/main amd64 Packages
   *** 1.1.1-0ubuntu8~cloud2 0
          100 /var/lib/dpkg/status
       0.9.8-2ubuntu17.19 0
          500 http://se.archive.ubuntu.com/ubuntu/ precise-updates/main amd64 Packages
       0.9.8-2ubuntu17.17 0
          500 http://security.ubuntu.com/ubuntu/ precise-security/main amd64 Packages
       0.9.8-2ubuntu17 0
          500 http://se.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages

    Installed: 1.5.0+dfsg-3ubuntu5~cloud0
    Candidate: 1.5.0+dfsg-3ubuntu5.4~cloud0
    Version table:
       1.5.0+dfsg-3ubuntu5.4~cloud0 0
          500 http://ubuntu-cloud.archive.canonical.com/ubuntu/ precise-updates/havana/main amd64 Packages
   *** 1.5.0+dfsg-3ubuntu5~cloud0 0
          100 /var/lib/dpkg/status
       1.0+noroms-0ubuntu14.15 0
          500 http://se.archive.ubuntu.com/ubuntu/ precise-updates/main amd64 Packages
       1.0+noroms-0ubuntu14.14 0
          500 http://security.ubuntu.com/ubuntu/ precise-security/main amd64 Packages
       1.0+noroms-0ubuntu13 0
          500 http://se.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages

  XML DUMP for a VM
  <domain type='kvm' id='7'>
    <memory unit='KiB'>8388608</memory>
    <currentMemory unit='KiB'>8388608</currentMemory>
    <vcpu placement='static'>4</vcpu>
    <sysinfo type='smbios'>
        <entry name='manufacturer'>OpenStack Foundation</entry>
        <entry name='product'>OpenStack Nova</entry>
        <entry name='version'>2013.2.3</entry>
        <entry name='serial'>01d3d524-32eb-e011-8574-441ea15e3971</entry>
        <entry name='uuid'>731c2191-fa82-4a38-9f52-e48fb37e92c8</entry>
      <type arch='x86_64' machine='pc-i440fx-1.5'>hvm</type>
      <boot dev='hd'/>
      <smbios mode='sysinfo'/>
    <cpu mode='host-model'>
      <model fallback='allow'/>
    <clock offset='utc'>
      <timer name='pit' tickpolicy='delay'/>
      <timer name='rtc' tickpolicy='catchup'/>
      <disk type='file' device='disk'>
        <driver name='qemu' type='qcow2' cache='none'/>
        <source file='/var/lib/nova/instances/731c2191-fa82-4a38-9f52-e48fb37e92c8/disk'/>
        <target dev='vda' bus='virtio'/>
        <alias name='virtio-disk0'/>
        <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
      <controller type='usb' index='0'>
        <alias name='usb0'/>
        <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
      <controller type='pci' index='0' model='pci-root'>
        <alias name='pci0'/>
      <interface type='bridge'>
        <mac address='fa:16:3e:a7:de:97'/>
        <source bridge='qbr43f8d3a5-e4'/>
        <target dev='tap43f8d3a5-e4'/>
        <model type='virtio'/>
        <alias name='net0'/>
        <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
      <serial type='file'>
        <source path='/var/lib/nova/instances/731c2191-fa82-4a38-9f52-e48fb37e92c8/console.log'/>
        <target port='0'/>
        <alias name='serial0'/>
      <serial type='pty'>
        <source path='/dev/pts/6'/>
        <target port='1'/>
        <alias name='serial1'/>
      <console type='file'>
        <source path='/var/lib/nova/instances/731c2191-fa82-4a38-9f52-e48fb37e92c8/console.log'/>
        <target type='serial' port='0'/>
        <alias name='serial0'/>
      <input type='tablet' bus='usb'>
        <alias name='input0'/>
      <input type='mouse' bus='ps2'/>
      <graphics type='vnc' port='5904' autoport='yes' listen='' keymap='en-us'>
        <listen type='address' address=''/>
        <model type='cirrus' vram='9216' heads='1'/>
        <alias name='video0'/>
        <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
      <memballoon model='virtio'>
        <alias name='balloon0'/>
        <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
    <seclabel type='dynamic' model='apparmor' relabel='yes'>

  I am reporting this for spark but this should be valid for any
  applications that involve fast data transfer between VMs. The bug has
  been reported in centos forums as well.


  and an older bug report on launchpad:
  ApportVersion: 2.0.1-0ubuntu17.6
  Architecture: amd64
  DistroRelease: Ubuntu 12.04
  InstallationMedia: Ubuntu-Server 12.04.3 LTS "Precise Pangolin" - Release amd64 (20130820.2)
  MarkForUpload: True
  Package: qemu-kvm 1.5.0+dfsg-3ubuntu5~cloud0
  PackageArchitecture: amd64
  ProcVersionSignature: Ubuntu 3.8.0-29.42~precise1-generic
  Tags: precise third-party-packages
  Uname: Linux 3.8.0-29-generic x86_64
  UnreportableReason: This is not an official Ubuntu package. Please remove any third party package and try again.
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip libvirtd lpadmin plugdev sambashare sudo

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