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  1. ZABBIX BUGS AND ISSUES
  2. ZBX-19324

Possible deadlock between history and configuration syncer

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    • Team:
      Team A
    • Sprint:
      Sprint 76 (May 2021)
    • Story Points:
      0.5

      Description

      Zabbix proxy processes history syncer and configuration syncer can update item_rtdata table at the same time, sometimes that behaviour leads to deadlock:

      127835 ?        S    448:03 /usr/sbin/zabbix_proxy: configuration syncer [synced config 275030365 bytes in 81.817207 sec, idle 600 sec]
      127835:20210430:052831.402 [Z3005] query failed: [0] PGRES_FATAL_ERROR:ERROR:  deadlock detected
      DETAIL:  Process 64959 waits for ShareLock on transaction 1610869401; blocked by process 35622.
      Process 35622 waits for ShareLock on transaction 1610861197; blocked by process 64959.
      HINT:  See server log for query details.
      CONTEXT:  while updating tuple (8678,47) in relation "item_rtdata"
       [update item_rtdata set lastlogsize=13215979 where itemid=4817759;
      update item_rtdata set lastlogsize=12228184 where itemid=4817853;
      update item_rtdata set lastlogsize=15520660 where itemid=4818605;
      update item_rtdata set lastlogsize=15527388 where itemid=4818699;
      update item_rtdata set lastlogsize=15550667 where itemid=4818793;
      update item_rtdata set lastlogsize=12248851 where itemid=4818887;
      update item_rtdata set lastlogsize=13073357 where itemid=4818981;
      update item_rtdata set lastlogsize=15361752 where itemid=4819075;
      update item_rtdata set lastlogsize=13887891 where itemid=4819457;
      update item_rtdata set lastlogsize=13063279 where itemid=4819551;
      update item_rtdata set lastlogsize=14095578 where itemid=4819645;
      update item_rtdata set lastlogsize=13180563 where itemid=4819739;
      ....
      
      127920 ?        S     47:22 /usr/sbin/zabbix_proxy: history syncer #5 [processed 201 values in 0.014312 sec, idle 1 sec]
      127920:20210430:052829.772 [Z3005] query failed: [0] PGRES_FATAL_ERROR:ERROR:  deadlock detected
      DETAIL:  Process 101748 waits for ShareLock on transaction 1610861197; blocked by process 64959.
      Process 64959 waits for ShareLock on transaction 1610869407; blocked by process 101748.
      HINT:  See server log for query details.
      CONTEXT:  while updating tuple (7974,72) in relation "item_rtdata"
       [update item_rtdata set lastlogsize=12379005,mtime=0 where itemid=4966526;
      update item_rtdata set lastlogsize=13169243,mtime=0 where itemid=4827071;
      update item_rtdata set lastlogsize=13207156,mtime=0 where itemid=5954656;
      update item_rtdata set lastlogsize=13173698,mtime=0 where itemid=4897443;
      update item_rtdata set lastlogsize=13218318,mtime=0 where itemid=6684365;
      update item_rtdata set lastlogsize=5586299,mtime=0 where itemid=6684366;
      update item_rtdata set lastlogsize=12274229,mtime=0 where itemid=7380422;
      update item_rtdata set lastlogsize=4965000,mtime=0 where itemid=7380423;
      ]
      

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            Assignee:
            wiper Andris Zeila
            Reporter:
            dotneft Alexey Pustovalov
            Votes:
            1 Vote for this issue
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            6 Start watching this issue

              Dates

              Created:
              Updated:
              Resolved: