[PVFS2-developers] Determining meaning of error code on I/O

[Dean Hildebrand]

Hello,

I've hacked up PVFS2 quite a bit now for my pNFS work and I'm receiving an
error in io_datafile_complete_msgpairs when submitting a write request
(similar with read).

The full trace is below, but the main lines are:
all msgpairs complete.
  matched response from 0.
  error 0 with status -1073741828 related to response from 0; not
submitting flow.

Can anyone tell me what error -1073741828 means (-0x40000004)?  The first
time I write to a new file it works fine, but the second time I get this
error.  I can't seem to find this error in a table anywhere.  It is always
the same error though, so I don't think it is just garbage.

Thanks,
Dean
ps: The trace may look a little wierd since I'm not getting the file
attributes directly from the PVFS2 server, but instead injecting them from
the NFSv4 client.

PVFS_sys_io entered
PVFS_isys_io entered
PVFS_isys_io fsid:925967295 handle:2147483649
io state: init
PINT_sm_common_object_getattr_setup_msgpair
setup fsid:925967295 handle:2147483649
getattr_acache state: lookup
getattr_acache state: fs_id:925967295 handle:2147483649
PINT_acache_lookup entered
PINT_acache_lookup exiting
getattr_acache state: Found!
PINT_acache_status called
pinode_status entered
PINODE STATUS IS PINODE STATUS VALID
pinode_status exited
getattr_acache state: Valid!
acache: acache hit
PINT_sm_common_getattr_object_comp_fn
PINT_acache_release entered
PINT_acache_release exited
(0x80c2b08) io state: io_datafile_setup_msgpairs
Searching for dist simple_stripe
PINT_New_request_state
PINT_New_request_state
PINT_Process_request
        size request - copying state, hold on to your hat! dp 1
        tiling 8 copies
        Do seq of 0 ne 1 st 1 nb 0 ub 1 lb 0 as 1 co 0
                lvl 0 el 0 blk 0 by 0
                to 0 ta 0 fi 7
        basic type or contiguous data
        calling distribute
        PINT_Distribute
                of 0 sz 7 ix 0 sm 1 by 0 bm 1 fsz 0 exfl 1
                begin iteration loff: 0
                segment exceeds byte limit
                file being extended
        process a segment
                        of 0 sz 1
        count segment in checksize
                end iteration
                done with segments or bytes
                finished
                        of 1 sz 6 sg 1 sm 1 by 1 bm 1
                        next loff: 1 next poff: 1
                        return value 1
        exiting distribute returned less than expected
        done sg 1 sm 1 by 1 bm 1 ta 0 to 1 fo 7 eof 0
        tiling 8 copies
        Do seq of 0 ne 1 st 1 nb 0 ub 1 lb 0 as 1 co 0
                lvl 0 el 0 blk 0 by 0
                to 0 ta 0 fi 7
        basic type or contiguous data
        calling distribute
        PINT_Distribute
                of 0 sz 7 ix 0 sm 1 by 0 bm 1 fsz 0 exfl 1
                begin iteration loff: 0
                segment exceeds byte limit
                file being extended
                segment exceeds byte limit
                file being extended
        process a segment
                        of 0 sz 1
        count segment in checksize
                end iteration
                done with segments or bytes
                finished
                        of 1 sz 6 sg 1 sm 1 by 1 bm 1
                        next loff: 1 next poff: 1
                        return value 1
        exiting distribute returned less than expected
        done sg 1 sm 1 by 1 bm 1 ta 0 to 1 fo 7 eof 0
io_find_target_dfiles: datafile 0 might have some data.
  datafile_setup_msgpairs: 1 datafiles might have data
  sending I/O request for 135047520
io_datafile_post_msgpairs state: post (1 message(s))
PINT_Do_Request_commit: commit node 0x809a6c0
node stored at 0
clearing tree
  io_datafile_post_msgpairs: send completed immediately.
PVFS_isys_io calling PINT_client_state_machine_test()
REQ SCHED SCHEDULING, queue_element: 0x80c2500
REQ SCHED POSTING, queue_element: 0x80c2500
PVFS_isys_io calling PINT_client_state_machine_test()
io state: datafile_complete_msgpairs
all msgpairs complete.
  matched response from 0.
  error 0 with status -1073741828 related to response from 0; not
submitting flow.
io state: datafile_complete_msgpairs
  trying to match to a flow or ack.
  all msgpairs, flows, ack completed.
(0x80c2b08) io state: analyze_results