It was done multiple times,
even more: system was recreated  by mkfs.
Still the same behavior...


Pawel

On 2012-08-22 04:21, Sunil Mushran wrote:
You may want to run a full fsck on the fs.

fsck.ocfs2 -fy /dev/xxxx

On Tue, Aug 21, 2012 at 12:49 AM, Pawel <pzl...@mp.pl <mailto:pzl...@mp.pl>> wrote:

    Hi,
    After upgrading ocfs2 my cluster is instable.

    At least ones per week I can see:
    kernel panic: Null pointer dereference  at 00048
    o2dlm_blocking_ast_wrapper + 0x8/0x20 [ocfs2_stack_o2cb]
    stack:
    dlm_do_local_bast [ocfs2_dlm]
    dlm_lookup_lockers [ocfs2_dlm]
    dlm_proxy_ast_handler
    add_timer
    ..

    After that sometimes deadlock happens on another nodes. Entire cluster
    restart solve the issue.
    I see in log:
    (dlm_thread,7227,3):dlm_send_proxy_ast_msg:484 ERROR:
    ECB9442E19A94EAC896641BFADD55E4B: res M0000000000000001f411c900000000,
    error -107 send AST to node 4
    (dlm_thread,7227,3):dlm_flush_asts:605 ERROR: status = -107
    o2net: No connection established with node 4 after 10.0 seconds,
    giving up.
    o2net: No connection established with node 4 after 10.0 seconds,
    giving up.
    o2net: No connection established with node 4 after 10.0 seconds,
    giving up.
    (dlm_thread,7227,4):dlm_send_proxy_ast_msg:484 ERROR:
    ECB9442E19A94EAC896641BFADD55E4B: res M0000000000000001f411c900000000,
    error -107 send AST to node 4
    (dlm_thread,7227,4):dlm_flush_asts:605 ERROR: status = -107
    o2cb: o2dlm has evicted node 4 from domain
    ECB9442E19A94EAC896641BFADD55E4B
    o2cb: o2dlm has evicted node 4 from domain
    ECB9442E19A94EAC896641BFADD55E4B
    o2dlm: Begin recovery on domain ECB9442E19A94EAC896641BFADD55E4B
    for node 4
    o2dlm: Node 5 (he) is the Recovery Master for the dead node 4 in
    domain
    ECB9442E19A94EAC896641BFADD55E4B
    o2dlm: End recovery on domain ECB9442E19A94EAC896641BFADD55E4B


    Additionaly ~4 times per day I see:

    ocfs2_check_dir_for_entry:2119 ERROR: status = -17
    ocfs2_mknod:459 ERROR: status = -17
    ocfs2_create:629 ERROR: status = -17


    I currently use kernel 3.4.2
    my filesystem has been created with:
    -N 8-b 4096 -C 32768 --fs-features
    
backup-super,strict-journal-super,sparse,extended-slotmap,inline-data,metaecc,xattr,indexed-dirs,refcount,discontig-bg,unwritten,usrquota,grpquota

    Could you tell me what could make my system instable? Which feature ?

    Thanks for any  help

    Pawel


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