geno976

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Hi,

I have a fedora 9 installation running on a Dell poweredge 1750. On two occasions it has hung or became unresponsive. When in the hung state I could still ping the box, but when I ssh into it it prompts me for the passwd, and when I type the password it hangs at the ssh login. I kill that terminal and start a new one, try to ssh into it and get the same hang after typing my password. I try to go to the actual console, but it is hung there as well. It's strange b/c although I can ping the box, it seems that the network functions are partially down b/c my VMWare VMs on that box all become unreachable.

I have another fedora 9 installation on a different dell poweredge 1750 also running VMware, same type of deployment and deployed at the same time, and this box has not had any hanging issue of sorts.

I checked /var/log/messages but there were no unusual errors in there. Can someone pls point me to the right direction on how I can go about finding the root cause?

Here's some hw info:

# cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 2
model name : Intel(R) Xeon(TM) CPU 2.80GHz
stepping : 9
cpu MHz : 2786.939
cache size : 512 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 1
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe pebs bts cid xtpr
bogomips : 5577.16
clflush size : 64

processor : 1
vendor_id : GenuineIntel
cpu family : 15
model : 2
model name : Intel(R) Xeon(TM) CPU 2.80GHz
stepping : 9
cpu MHz : 2786.939
cache size : 512 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 1
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe pebs bts cid xtpr
bogomips : 5572.69
clflush size : 64

processor : 2
vendor_id : GenuineIntel
cpu family : 15
model : 2
model name : Intel(R) Xeon(TM) CPU 2.80GHz
stepping : 9
cpu MHz : 2786.939
cache size : 512 KB
physical id : 3
siblings : 2
core id : 0
cpu cores : 1
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe pebs bts cid xtpr
bogomips : 5572.74
clflush size : 64

processor : 3
vendor_id : GenuineIntel
cpu family : 15
model : 2
model name : Intel(R) Xeon(TM) CPU 2.80GHz
stepping : 9
cpu MHz : 2786.939
cache size : 512 KB
physical id : 3
siblings : 2
core id : 0
cpu cores : 1
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe pebs bts cid xtpr
bogomips : 5573.05
clflush size : 64

# cat /proc/meminfo
MemTotal: 2074988 kB
MemFree: 56160 kB
Buffers: 11176 kB
Cached: 1607052 kB
SwapCached: 0 kB
Active: 1349556 kB
Inactive: 415304 kB
HighTotal: 1179484 kB
HighFree: 1736 kB
LowTotal: 895504 kB
LowFree: 54424 kB
SwapTotal: 2031608 kB
SwapFree: 2031608 kB
Dirty: 40428 kB
Writeback: 0 kB
AnonPages: 146644 kB
Mapped: 1202604 kB
Slab: 49940 kB
SReclaimable: 20288 kB
SUnreclaim: 29652 kB
PageTables: 5328 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
CommitLimit: 3069100 kB
Committed_AS: 699600 kB
VmallocTotal: 110584 kB
VmallocUsed: 3592 kB
VmallocChunk: 106880 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 4096 kB

Thank you,

Mr. C.

Two things come to mind:

1) duplicate IP address on the network
2) corrupted root file system, and some important directory has its inode locked

Can you check on both of these?

geno976

Thanks for the response Mr. C.

1. I confirmed that it's not a duplicate ipaddr issue.
2. How can I check for #2 ?

Regards,

Mr. C.

sudo touch /forcefsck

and reboot as normal.

alosii

Hey guys!

I have the same problem with Fedora 9 x86_64. The network will sometimes hang. Apache, tracd (a server for a ticket system) and SSH will stop responding. My SSH will sometimes hang in the middle of a session with no apparent reason. The computer has a static IP address and no collisions on the network. The disk is fine. Any other Ideas?

geno976

I ran a /forcefsck but it did not return any errors nor report that it fixed any inodes during boot. Checked dmesg afterwards as well and all looked ok. I guess I'll just monitor the box for a while to see if the problem happens again, leaving it out of production for now.