[Xen-users] Xend has probably crashed! Invalid or missing HTTP status code.

[jayesh shinde <jayesha_shinde@xxxxxxxxx>]

Hi all ,

I am using the XEN  from last 1 year with below packages and with branded h/w
This is 64 bit RHEL OS  with kernel 2.6.18-92.el5xen

kernel-xen-2.6.18-92.el5
xen-libs-3.0.3-64.el5
xen-libs-3.0.3-64.el5
xen-3.0.3-64.el5

The XEN server is running with 4 Vritual machine , I am using the local HDD for xen VM image.  The sample config file is as below.

cat /etc/xen/dr-extsmtp2

name = "vm1"
uuid = "162084f2-5646-d121-9d53-f4f65ccc4e13"
maxmem = 2000
memory = 2000
vcpus = 1
bootloader = "/usr/bin/pygrub"



vfb = [ "type=vnc,vncunused=1,keymap=en-us" ]
disk = [ "tap:aio:/var/lib/xen/images/vm1.img,xvda,w" ]
vif = [ "mac=00:16:3e:1d:e5:7b,bridge=xenbr1" ]


problem :--
========
 My entire server and VM goes in read only mode.  This happen 2 times But I could not figure out way this is happening. I do Google and checked the mailling list and  Redhat support,  but actual root cause is not getting find out.  The error are as follows.

I could not figure out whether its a local HDD problem OR XEN problem ?


I have taken the below commands output with error :---
========================================
[root@basemachine~]# xm list
Xend has probably crashed!  Invalid or missing HTTP status code.

[root@basemachine ~]# touch  a
touch: cannot touch `a': Read-only file system

[root@basemachine ~]# mkdir newtestfolder
mkdir: cannot create directory `newtestfolder': Read-only file system

[root@basemachine ~]# df -kh
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda3             794G  604G  149G  81% /
/dev/sda1             487M   23M  439M   5% /boot
tmpfs                  16G     0   16G   0% /dev/shm

[root@vm1 ~]# touch  a
touch: cannot touch `a': Read-only file system

SAN and HBA connectivity output.

[root@basemachine ~]# systool -c fc_host -v
Class = "fc_host"

  Class Device = "host3"
  Class Device path = "/sys/class/fc_host/host3"
    active_fc4s         = "0x00 0x00 0x01 0x00 0x00 0x00 0x00 0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 "
    fabric_name         = "0x2002000dec20c201"
    issue_lip           = <store method only>
    maxframe_size       = "2048 bytes"
    node_name           = "0x20000000c990ed8c"
    port_id             = "0x600062"
    port_name           = "0x10000000c990ed8c"
    port_state          = "Online"
    port_type           = "NPort (fabric via point-to-point)"
    speed               = "2 Gbit"
    supported_classes   = "Class 3"
    supported_fc4s      = "0x00 0x00 0x01 0x00 0x00 0x00 0x00 0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 "
    supported_speeds    = "1 Gbit, 2 Gbit, 4 Gbit"
    tgtid_bind_type     = "wwpn (World Wide Port Name)"
    uevent              = <store method only>

    Device = "host3"
    Device path = "/sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/host3"
      uevent              = <store method only>


  Class Device = "host4"
  Class Device path = "/sys/class/fc_host/host4"
    active_fc4s         = "0x00 0x00 0x01 0x00 0x00 0x00 0x00 0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 "
    fabric_name         = "0x2002000dec1fbd41"
    issue_lip           = <store method only>
    maxframe_size       = "2048 bytes"
    node_name           = "0x20000000c990fd14"
    port_id             = "0x7a0059"
    port_name           = "0x10000000c990fd14"
    port_state          = "Online"
    port_type           = "NPort (fabric via point-to-point)"
    speed               = "2 Gbit"
    supported_classes   = "Class 3"
    supported_fc4s      = "0x00 0x00 0x01 0x00 0x00 0x00 0x00 0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 "
    supported_speeds    = "1 Gbit, 2 Gbit, 4 Gbit"
    tgtid_bind_type     = "wwpn (World Wide Port Name)"
    uevent              = <store method only>

    Device = "host4"
    Device path = "/sys/devices/pci0000:00/0000:00:06.0/0000:13:00.0/0000:14:02.0/0000:15:00.0/host4"
      uevent              = <store method only>


[root@basemachine ~]# dmesg    ( is showing below errors)


:0: rejecting I/O to offline device
sd 0:2:0:0: rejecting I/O to offline device
sd 0:2:0:0: rejecting I/O to offline device
sd 0:2:0:0: rejecting I/O to offline device
sd 0:2:0:0: rejecting I/O to offline device
sd 0:2:0:0: rejecting I/O to offline device
sd 0:2:0:0: rejecting I/O to offline device
sd 0:2:0:0: rejecting I/O to offline device
sd 0:2:0:0: rejecting I/O to offline device
sd 0:2:0:0: rejecting I/O to offline device
sd 0:2:0:0: rejecting I/O to offline device
sd 0:2:0:0: rejecting I/O to offline device
sd 0:2:0:0: rejecting I/O to offline device
sd 0:2:0:0: rejecting I/O to offline device
sd 0:2:0:0: rejecting I/O to offline device
sd 0:2:0:0: rejecting I/O to offline device
sd 0:2:0:0: rejecting I/O to offline device
sd 0:2:0:0: rejecting I/O to offline device
sd 0:2:0:0: rejecting I/O to offline device
sd 0:2:0:0: rejecting I/O to offline device
sd 0:2:0:0: rejecting I/O to offline device
sd 0:2:0:0: rejecting I/O to offline device
sd 0:2:0:0: rejecting I/O to offline device
sd 0:2:0:0: rejecting I/O to offline device
sd 0:2:0:0: rejecting I/O to offline device
sd 0:2:0:0: rejecting I/O to offline device


Please guide and help me to come out.

Regards
Jayesh Shinde

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