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  1. Percona XtraDB Cluster
  2. PXC-2365

DDL during SST blocks Donor

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    Details

    • Type: Bug
    • Status: Done
    • Priority: Medium
    • Resolution: Invalid
    • Affects Version/s: 5.7.25-31.35, 8.x
    • Fix Version/s: None
    • Component/s: None
    • Labels:
      None

      Description

      With 5.7.22-29.26 and 5.7.24-31.33,  a ddl blocks the donor during a SST.   That wasn't the case with 5.6.  On the donor the receive queue grows very large until the SST completes.  Local writes are also blocked.

       

      here's 2 threads on the donor:

      }}{{*************************** 11. row ***************************
      {{ Id: 14}}
      {{ User: root}}
      {{ Host: localhost}}
      {{ db: test}}
      {{ Command: Query}}
      {{ Time: 305}}
      {{ State: Waiting for backup lock}}
      {{ Info: create table test2 (id int)}}
      {{ Rows_sent: 0}}
      Rows_examined: 0
      *************************** 12. row ***************************
      {{ Id: 15}}
      {{ User: root}}
      {{ Host: localhost}}
      {{ db: test}}
      {{ Command: Query}}
      {{ Time: 139}}
      {{ State: wsrep: initiating pre-commit for write set (2)}}
      {{ Info: insert into testtable (data) values (now())}}
      {{ Rows_sent: 0}}
      Rows_examined: 0

       

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                Assignee:
                zsolt.parragi Zsolt Parragi
                Reporter:
                yves@percona.com Yves Trudeau
                Votes:
                2 Vote for this issue
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                11 Start watching this issue

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                  Resolved:

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                    5h 36m