If you get kernel crashes, a system dump, the system console or the
system logs would give more information about the root cause, rather
than a userland process.
On 08/23/17 16:55, Mervini, Joseph A wrote:
I just re-ran the scan using strace -f and this is the tail of the
output up until the machine rebooted:
2017/08/23 08:39:44 [13249/7] ListMgr | SQL query: COMMIT
[pid 13254] <... futex resumed> ) = -1 EAGAIN (Resource
temporarily unavailable)
[pid 13267] futex(0x7f287e59e9f0, FUTEX_WAIT_PRIVATE, 2, NULL
<unfinished ...>
[pid 13263] futex(0x7f287e59e9f0, FUTEX_WAIT_PRIVATE, 2, NULL
<unfinished ...>
[pid 13271] <... ioctl resumed> , 0x7f28351b9490) = 0
[pid 13257] <... write resumed> ) = 58
[pid 13254] futex(0x7f287e59e9f0, FUTEX_WAIT_PRIVATE, 2, NULL
<unfinished ...>
[pid 13271] newfstatat(10, "ompi-f77.pc", <unfinished ...>
[pid 13257] futex(0x7f287e59e9f0, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
[pid 13254] <... futex resumed> ) = -1 EAGAIN (Resource
temporarily unavailable)
[pid 13270] <... openat resumed> ) = 12
[pid 13257] <... futex resumed> ) = 1
[pid 13255] <... futex resumed> ) = 0
[pid 13254] futex(0x7f287e59e9f0, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
[pid 13270] ioctl(12, _IOC(_IOC_READ, 0x66, 0xad, 0x08),
0x7f284190a680 <unfinished ...>
[pid 13257] poll([{fd=15, events=POLLIN|POLLPRI}], 1, 0 <unfinished ...>
[pid 13255] futex(0x7f287e59e9f0, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
[pid 13270] <... ioctl resumed> ) = 0
[pid 13257] <... poll resumed> ) = 0 (Timeout)
[pid 13255] <... futex resumed> ) = 1
[pid 13254] <... futex resumed> ) = 1
[pid 13253] <... futex resumed> ) = 0
[pid 13268] <... futex resumed> ) = 0
[pid 13270] close(12 <unfinished ...>
[pid 13257] write(15, "\7\0\0\0\3COMMIT", 11 <unfinished ...>
[pid 13255] write(2, "2017/08/23 08:39:44 [13249/6] Li"..., 108
<unfinished ...>
2017/08/23 08:39:44 [13249/6] ListMgr | SQL query: SELECT id FROM
ENTRIES WHERE id='0x200000405:0xd5b0:0x0'
[pid 13268] futex(0x7f287e59e9f0, FUTEX_WAIT_PRIVATE, 2, NULL
<unfinished ...>
[pid 13253] futex(0x7f287e59e9f0, FUTEX_WAIT_PRIVATE, 2, NULL
<unfinished ...>
[pid 13257] <... write resumed> ) = 11
[pid 13255] <... write resumed> ) = 108
[pid 13254] futex(0x7f287e59e9f0, FUTEX_WAIT_PRIVATE, 2, NULL
<unfinished ...>
[pid 13271] <... newfstatat resumed> {st_mode=S_IFREG|0640,
st_size=665, ...}, AT_SYMLINK_NOFOLLOW) = 0
[pid 13257] read(15, <unfinished ...>
[pid 13255] futex(0x7f287e59e9f0, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
[pid 13254] <... futex resumed> ) = -1 EAGAIN (Resource
temporarily unavailable)
[pid 13271] openat(10, "ompi-f77.pc",
O_RDONLY|O_NONBLOCK|O_NOFOLLOW|O_NOATIME <unfinished ...>
[pid 13266] <... futex resumed> ) = 0
[pid 13255] <... futex resumed> ) = 1
[pid 13254] write(2, "2017/08/23 08:39:44 [13249/5] Li"...,
1082017/08/23 08:39:44 [13249/5] ListMgr | SQL query: SELECT id FROM
ENTRIES WHERE id='0x200000405:0xcc68:0x0'
<unfinished ...>
[pid 13266] futex(0x7f287e59e9f0, FUTEX_WAIT_PRIVATE, 2, NULL
<unfinished ...>
[pid 13255] futex(0x7f287e59e9f0, FUTEX_WAIT_PRIVATE, 2, NULL
<unfinished ...>
[pid 13254] <... write resumed> ) = 108
[pid 13254] futex(0x7f287e59e9f0, FUTEX_WAKE_PRIVATE, 1) = 1
[pid 13270] <... close resumed> ) = 0
[pid 13259] <... futex resumed> ) = 0
Write failed: Broken pipe
NOTE: I captured the entire output from strace in a screen log.
====
Joe Mervini
Sandia National Laboratories
High Performance Computing
505.844.6770
jame...@sandia.gov <mailto:jame...@sandia.gov>
On Aug 22, 2017, at 9:17 AM, Mervini, Joseph A <jame...@sandia.gov
<mailto:jame...@sandia.gov>> wrote:
Hello,
I have not received a response to this posting but have continued to
try and figure out why this problem persists.
Since I initially opened the request I have been able to duplicate it
on three different machines. I have also tried multiple kernel
versions and lustre 2.8 client versions. I have also completely
rebuilt my lustre file system will a newer version of 2.8 (2.8.0.9.)
The problem only presents itself when running a scan against the 2.8
lustre file system. A 2.5 lustre file system works fine.
I decided to run the simultaneous scan against both file systems
using valgrind and although (again) the 2.5 version of the file
system completed the system rebooted prior to the 2.8 version scan
completed. However in both scan valgrind’s output was similar with
output like this:
==8883== Thread 7:
==8883== Conditional jump or move depends on uninitialised value(s)
==8883== at 0x44B8E8: batch_insert_stripe_info (listmgr_stripe.c:168)
==8883== by 0x44B1F1: listmgr_batch_insert_no_tx
(listmgr_insert.c:246)
==8883== by 0x44B35D: ListMgr_Insert (listmgr_insert.c:274)
==8883== by 0x4199E4: EntryProc_db_apply (std_pipeline.c:1616)
==8883== by 0x415B5D: entry_proc_worker_thr (entry_proc_impl.c:145)
==8883== by 0x60B2DC4: start_thread (in /usr/lib64/libpthread-2.17.so)
==8883== by 0x6B0D76C: clone (in /usr/lib64/libc-2.17.so)
==8883==
==8883== Conditional jump or move depends on uninitialised value(s)
==8883== at 0x44B9C5: batch_insert_stripe_info (listmgr_stripe.c:168)
==8883== by 0x44B1F1: listmgr_batch_insert_no_tx
(listmgr_insert.c:246)
==8883== by 0x44B35D: ListMgr_Insert (listmgr_insert.c:274)
==8883== by 0x4199E4: EntryProc_db_apply (std_pipeline.c:1616)
==8883== by 0x415B5D: entry_proc_worker_thr (entry_proc_impl.c:145)
==8883== by 0x60B2DC4: start_thread (in /usr/lib64/libpthread-2.17.so)
==8883== by 0x6B0D76C: clone (in /usr/lib64/libc-2.17.so)
==8883==
==8883==
==8883== More than 10000000 total errors detected. I'm not reporting
any more.
==8883== Final error counts will be inaccurate. Go fix your program!
==8883== Rerun with --error-limit=no to disable this cutoff. Note
==8883== that errors may occur in your program without prior warning from
==8883== Valgrind, because errors are no longer being displayed.
==8883==
====
Is this considered normal?
Joe Mervini
Sandia National Laboratories
High Performance Computing
505.844.6770
jame...@sandia.gov <mailto:jame...@sandia.gov>
On Jul 11, 2017, at 10:17 AM, Mervini, Joseph A <jame...@sandia.gov
<mailto:jame...@sandia.gov>> wrote:
Hello,
I have a problem similar to
https://sourceforge.net/p/robinhood/mailman/message/35883907/ in
which the robinhood server running mariadb-5.5.52-1.el7.x86_64 and
lustre 2.8.0.8 client will reboot when the initial scan is run. I am
running this in a testbed environment prior to deployment on our
production system because I want to get a complete handle on it
before I commit to the deployment. I have 2 separate lustre file
systems that I am running against: One is a 408TB lustre 2.8 file
system with ~16M inodes, the other is a 204TB lustre 2.5.5 file
system with ~3M inodes.
The curious thing is that I had successfully scanned both file
systems independently on the system with everything working
(including web-gui) and then basically blew away the databases to
get a datapoint on how the system performed and the time it took if
I ran a scan on both file systems simultaneously. It appears that it
is only impacting the 2.8 file system database. I just ran a fresh
scan against the 2.5.5 file system without problem. I then stated a
new scan against the 2.8 file system an once again it rebooted.
Like the other support ticket above, when I ran the scan only on the
2.8 file system in debug mode it also reported messages similar to
“2017/07/10 15:44:58 [15191/6] FS_Scan | openat failed on
<parent_fd=18>/libippch.so: Too many levels of symbolic links”. I
check a large number of the files that were being reported and for
the most part they were library files with only a couple of symlinks
to the .so file in the same directory.
The only other thing of note that I was able to capture is this from
the console output:
[ 3301.937577] LustreError:
15209:0:(linux-module.c:92:obd_ioctl_getdata()) Version mismatch
kernel (10004) vs application (0)
[ 3301.950059] LustreError:
15209:0:(class_obd.c:230:class_handle_ioctl()) OBD ioctl: data error"
There was no indication of a fault in any of the log files and I was
running top and htop during the process and neither CPU or memory
was exhausted. Nor did I see anything suspicious happening on the
file system itself.
Any help or clues as to why this is failing would be greatly
appreciated. Thanks in advance.
====
Joe Mervini
Sandia National Laboratories
High Performance Computing
505.844.6770
jame...@sandia.gov <mailto:jame...@sandia.gov>
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