[slurm-users] slurmdbd crashes with segmentation fault following DBD_GET_ASSOCS

[Dustin Lang]

Hi,

Apparently my colleague upgraded the mysql client and server, but, as far
as I can tell, this was only 5.7.29 to 5.7.30, and checking the mysql
release notes I  don't see anything that looks suspicious there...

cheers,
--dustin


On Tue, May 5, 2020 at 1:37 PM Dustin Lang <dstndstn at gmail.com> wrote:

> Hi,
>
> We're running Slurm 17.11.12.  Everything has been working fine, and then
> suddenly slurmctld is crashing and slurmdbd is crashing.
>
> We use fair-share as part of the queuing policy, and previously set up
> accounts with sacctmgr; that has been working fine for months.
>
> If I run slurmdbd in debug mode,
>
>  slurmdbd -D -v -v -v -v -v
>
> it eventually (after being contacted by slurmctld) segfaults with:
>
> ...
> slurmdbd: debug2: DBD_NODE_STATE: NODE:cn049 STATE:UP REASON:(null)
> TIME:1588695584
> slurmdbd: debug4: got 0 commits
> slurmdbd: debug2: DBD_NODE_STATE: NODE:cn050 STATE:UP REASON:(null)
> TIME:1588695584
> slurmdbd: debug4: got 0 commits
> slurmdbd: debug4: got 0 commits
> slurmdbd: debug2: DBD_GET_TRES: called
> slurmdbd: debug4: got 0 commits
> slurmdbd: debug2: DBD_GET_QOS: called
> slurmdbd: debug4: got 0 commits
> slurmdbd: debug2: DBD_GET_USERS: called
> slurmdbd: debug4: got 0 commits
> slurmdbd: debug2: DBD_GET_ASSOCS: called
> slurmdbd: debug4: 10(as_mysql_assoc.c:2033) query
> call get_parent_limits('assoc_table', 'root', 'slurm_cluster', 0); select
> @par_id, @mj, @msj, @mwpj, @mtpj, @mtpn, @mtmpj, @mtrm, @def_qos_id, @qos,
> @delta_qos;
> Segmentation fault (core dumped)
>
>
> It looks (running slurmdbd in gdb) like that segfault is coming from
>
>
> https://github.com/SchedMD/slurm/blob/slurm-17-11-12-1/src/plugins/accounting_storage/mysql/as_mysql_assoc.c#L2073
>
> and If I connect to the mysql database directly and call that stored
> procedure, I get
>
> mysql> call get_parent_limits('assoc_table', 'root', 'slurm_cluster', 0);
>
> +---------------------+-----------------+-------------------------+----------------------+---------------------------+-------------+-----------------------------------------------------------------+-------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------+-----------------------------+
> | @par_id := id_assoc | @mj := max_jobs | @msj := max_submit_jobs | @mwpj
> := max_wall_pj | @def_qos_id := def_qos_id | @qos := qos | @delta_qos :=
> REPLACE(CONCAT(delta_qos, @delta_qos), ',,', ',') | @mtpj := CONCAT(@mtpj,
> if (@mtpj != '' && max_tres_pj != '', ',', ''), max_tres_pj) | @mtpn :=
> CONCAT(@mtpn, if (@mtpn != '' && max_tres_pn != '', ',', ''), max_tres_pn)
> | @mtmpj := CONCAT(@mtmpj, if (@mtmpj != '' && max_tres_mins_pj != '', ',',
> ''), max_tres_mins_pj) | @mtrm := CONCAT(@mtrm, if (@mtrm != '' &&
> max_tres_run_mins != '', ',', ''), max_tres_run_mins) | @my_acct_new :=
> parent_acct |
>
> +---------------------+-----------------+-------------------------+----------------------+---------------------------+-------------+-----------------------------------------------------------------+-------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------+-----------------------------+
> |                   1 |            NULL |                    NULL |
>           NULL |                      NULL | ,1,         | NULL
>                                                | NULL
>                                                          | NULL
>                                                                    | NULL
>
>               | NULL
>                                      |                             |
>
> +---------------------+-----------------+-------------------------+----------------------+---------------------------+-------------+-----------------------------------------------------------------+-------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------+-----------------------------+
>
> and if I run
>
> mysql> call get_parent_limits('assoc_table', 'root', 'slurm_cluster', 0);
> select @par_id, @mj, @msj, @mwpj, @mtpj, @mtpn, @mtmpj, @mtrm, @def_qos_id,
> @qos, @delta_qos;
>
> I get
>
>
> +---------+------+------+-------+-------+-------+--------+-------+-------------+------+------------+
> | @par_id | @mj  | @msj | @mwpj | @mtpj | @mtpn | @mtmpj | @mtrm |
> @def_qos_id | @qos | @delta_qos |
>
> +---------+------+------+-------+-------+-------+--------+-------+-------------+------+------------+
> |       1 | NULL | NULL |  NULL | NULL  | NULL  | NULL   | NULL  |
>  NULL | ,1,  | NULL       |
>
> +---------+------+------+-------+-------+-------+--------+-------+-------------+------+------------+
>
> but I don't know what to do about this.
>
> We use another product ("Bright Cluster Manager") to manage some aspects
> of the cluster and Slurm installation, so we are hesitant to just upgrade
> Slurm.
>
> I would appreciate any tips.
>
> Thanks,
> --dustin
>
>
>
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