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  1. MariaDB Server
  2. MDEV-8527

show slave status, show global status deadlock

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    Details

    • Type: Bug
    • Status: Closed (View Workflow)
    • Priority: Major
    • Resolution: Not a Bug
    • Affects Version/s: 10.0.19
    • Fix Version/s: N/A
    • Component/s: OTHER
    • Labels:
      None
    • Environment:
      RHEL 6.5 x86_64

      Description

      On parallel slave:

      | 16210 | system user |                     | NULL               | Connect | 1961018 | Waiting for work from SQL thread       | NULL               |    0.000 |
      | 16211 | system user |                     | NULL               | Connect | 1961148 | Waiting for work from SQL thread       | NULL               |    0.000 |
      | 16212 | system user |                     | NULL               | Connect | 1961148 | Waiting for work from SQL thread       | NULL               |    0.000 |
      | 16213 | system user |                     | NULL               | Connect | 1961148 | Waiting for work from SQL thread       | NULL               |    0.000 |
      | 16214 | system user |                     | NULL               | Connect | 1961148 | Waiting for work from SQL thread       | NULL               |    0.000 |
      | 16215 | system user |                     | NULL               | Connect | 1961018 | Waiting for work from SQL thread       | NULL               |    0.000 |
      | 16216 | system user |                     | NULL               | Connect | 1961148 | Waiting for work from SQL thread       | NULL               |    0.000 |
      | 16217 | system user |                     | NULL               | Connect | 1961019 | Waiting for work from SQL thread       | NULL               |    0.000 |
      | 21710 | munin       | localhost           | information_schema | Query   |  431112 | init                                   | SHOW SLAVE STATUS  |    0.000 |
      | 21711 | munin       | localhost           | information_schema | Query   |  431050 | Filling schema table                   | SHOW GLOBAL STATUS |    0.000 |
      | 21712 | munin       | localhost           | information_schema | Query   |  430988 | Filling schema table                   | SHOW GLOBAL STATUS |    0.000 |
      | 21713 | munin       | localhost           | information_schema | Query   |  430926 | Filling schema table                   | SHOW GLOBAL STATUS |    0.000 |
      | 21714 | munin       | localhost           | information_schema | Query   |  430864 | Filling schema table                   | SHOW GLOBAL STATUS |    0.000 |
      | 21715 | munin       | localhost           | information_schema | Query   |  430802 | Filling schema table                   | SHOW GLOBAL STATUS |    0.000 |
      | 21716 | munin       | localhost           | information_schema | Query   |  430740 | Filling schema table                   | SHOW GLOBAL STATUS |    0.000 |
      | 21717 | munin       | localhost           | information_schema | Query   |  430678 | Filling schema table                   | SHOW GLOBAL STATUS |    0.000 |
      | 21718 | munin       | localhost           | information_schema | Query   |  430616 | Filling schema table                   | SHOW GLOBAL STATUS |    0.000 |
      | 21719 | munin       | localhost           | information_schema | Query   |  430554 | Filling schema table                   | SHOW GLOBAL STATUS |    0.000 |
      | 21720 | munin       | localhost           | information_schema | Query   |  430492 | Filling schema table                   | SHOW GLOBAL STATUS |    0.000 |
      | 21721 | munin       | localhost           | information_schema | Query   |  430429 | Filling schema table                   | SHOW GLOBAL STATUS |    0.000 |
      | 21722 | munin       | localhost           | information_schema | Query   |  430367 | Filling schema table                   | SHOW GLOBAL STATUS |    0.000 |
      | 21723 | munin       | localhost           | information_schema | Query   |  430305 | Filling schema table                   | SHOW GLOBAL STATUS |    0.000 |
      | 21724 | munin       | localhost           | information_schema | Query   |  430243 | Filling schema table                   | SHOW GLOBAL STATUS |    0.000 |
      | 21725 | wpro        | 172.16.194.79:60555 | NULL               | Query   |   99373 | init                                   | SHOW SLAVE STATUS  |    0.000 |
      | 21726 | openquery   | 127.0.0.1:59505     | NULL               | Killed  |    2166 | init                                   | show slave status  |    0.000 |
      | 21731 | openquery   | localhost           | NULL               | Query   |       0 | init                                   | show processlist   |    0.000 |

      attached backtrace taken at this point. As no RPM build of debug symbols this is missing symbols still (MDEV-4646). Using an objdump analysis like MDEV-8108 will probably point to the relevant lock.

      Using MDEV-7126 as basis for test:
      no response from:

      show global variables
      show global variables like 'replicate_i%';
      show global status like 'Bytes_%';
      show global status like 'Busy_%';
      show global status like 'x%';

      response from:

      MariaDB [(none)]> show global variables like 'report%';
       
      +-----------------+-------------+
      | Variable_name   | Value       |
      +-----------------+-------------+
      | report_host     | tulwaurt009 |
      | report_password |             |
      | report_port     | 3310        |
      | report_user     |             |
      +-----------------+-------------+
      4 rows in set (0.00 sec)
       
      MariaDB [(none)]> show global variables like 'replicate_a%';
      +-------------------------------+-------+
      | Variable_name                 | Value |
      +-------------------------------+-------+
      | replicate_annotate_row_events | ON    |
      MariaDB [(none)]> show global variables like 'de%';
      +-----------------------------+----------+
      | Variable_name               | Value    |
      +-----------------------------+----------+
      | deadlock_search_depth_long  | 15       |
      | deadlock_search_depth_short | 4        |
      | deadlock_timeout_long       | 50000000 |
      | deadlock_timeout_short      | 10000    |
      | debug_no_thread_alarm       | OFF      |
      | default_regex_flags         |          |
      | default_storage_engine      | InnoDB   |
      | default_week_format         | 0        |
      | delay_key_write             | ON       |
      | delayed_insert_limit        | 100      |
      | delayed_insert_timeout      | 300      |
      | delayed_queue_size          | 1000     |
      +-----------------------------+----------+
       

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              Assignee:
              Unassigned
              Reporter:
              danblack Daniel Black
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                Dates

                Created:
                Updated:
                Resolved: