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xsan panic and recurring errors

1092 Views 7 Replies Latest reply: Apr 10, 2012 2:13 PM by etblack RSS
etblack Calculating status...
Currently Being Moderated
Apr 3, 2012 11:02 AM

I had the volume go down in a panic last week. We were able to restart and get everything running but now have a persistent error which appears to be related. Both reference gethostbyname. I have dns setup for all of the systems on both the regular network and the metadata. One of the issues is that there is no secondary mdc, a problem the client refuses to rectify.





Process:         fsm [189]

Path:            /Library/Filesystems/Xsan/bin/fsm

Identifier:      fsm

Version:         ??? (???)

Code Type:       X86-64 (Native)

Parent Process:  fsmpm [179]



Date/Time:       2012-03-26 13:58:00.591 -0700

OS Version:      Mac OS X Server 10.6.8 (10K549)

Report Version:  6



Exception Type:  EXC_CRASH (SIGABRT)

Exception Codes: 0x0000000000000000, 0x0000000000000000

Crashed Thread:  0  Dispatch queue:



Application Specific Information:

PANIC: /Library/Filesystems/Xsan/bin/fsm "Server_comm_init GetHostByName failed" file server_comm.c, line 3455




Thread 0 Crashed:  Dispatch queue:

0   libSystem.B.dylib                       0x00007fff848529da __pthread_kill + 10

1   libSystem.B.dylib                       0x00007fff848522fe pthread_kill + 83

2   fsm                                     0x00000001000ac22c 0x100000000 + 705068

3   fsm                                     0x00000001000ac787 0x100000000 + 706439

4   fsm                                     0x00000001000ea56a 0x100000000 + 959850

5   fsm                                     0x00000001000767f9 0x100000000 + 485369

6   fsm                                     0x0000000100030aa4 0x100000000 + 199332

7   fsm                                     0x0000000100000d94 0x100000000 + 3476



This error keeps cropping up in the current logs:



prod servermgrd[16235]: xsan: [16235/2112B0] ERROR: get_fsmvol_at_index: Could not connect to FSM because Cannot get host by name - No such file or directory

  • Julius.J Calculating status...
    Currently Being Moderated
    Apr 3, 2012 5:04 PM (in response to etblack)

    This is the log form the MDC?
    Can you look at the fsnameservers file in the xsan preferences directory and see if the mdc's ip is the only one on the list.
    library/filesystems/xsan/fsnameservers (I think I'm on 10.7 now and they moved it).
    Can you run sudo changeip -checkhostname on the MDC and post the output (it should just be the ip address of the MDC and its dns name/hostname).


    *Edit oh this is the same post~

  • Blaidd Drwg Level 1 Level 1 (70 points)
    Currently Being Moderated
    Apr 4, 2012 8:14 PM (in response to etblack)

    Verify your MDC gets an answer when doing a reverse lookup on each of its IPs. All DNS servers should respond with the same answer for each IP address. If they don't provide an answer or there's a mismatch, fix that in the DNS server.


    Alternatively, you could simply add lines in /etc/hosts on the MDC, like this for the metadata IP address:


  • Blaidd Drwg Level 1 Level 1 (70 points)
    Currently Being Moderated
    Apr 6, 2012 12:29 AM (in response to etblack)

    Hmm... that crash should only occur when there's a DNS failure of some kind. Try contacting AppleCare.

  • Julius.J Level 1 Level 1 (0 points)
    Currently Being Moderated
    Apr 6, 2012 3:31 PM (in response to etblack)

    It might be worth while to clear your dns cache on the mdc if its also the dns.


    ~dscacheutil -flushcache


    Is there anything else in the logs that seem relevent?

    Have you run a permissions fix on the mdc anytime recently?


    In your dns setting you have one host name for the public and one for the private?

    internet - mdc01."yourdomain"."internal"

    private net - mdc01-san."yourdomain"."internal"


    Do you have any crostalk? (if only the private network is pluged in does it get a dhcp address? If you add the dns address to your static private port it can you get online?)

  • Blaidd Drwg Level 1 Level 1 (70 points)
    Currently Being Moderated
    Apr 9, 2012 10:39 AM (in response to Julius.J)

    I know you said DNS looks good. But try adding the /etc/hosts entries for the MDC's public and private IPs anyway as a test. Do the GetHostByName panics continue? I bet they stop.


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