Uploaded image for project: 'MariaDB ColumnStore'
  1. MariaDB ColumnStore
  2. MCOL-5279

MCS Cluster: After software update from 6.x to 22.08, queries hang on one node

    XMLWordPrintable

Details

    • Bug
    • Status: Closed (View Workflow)
    • Blocker
    • Resolution: Fixed
    • 22.08.2
    • 22.08.3
    • None
    • 2022-22

    Description

      "Where this join query hangs forever on the master node, but runs fine on the replicas"

      SELECT ff.acct_id, COUNT(1) 
      FROM ff JOIN dd  ON ff.acct_sk =dd.acct_sk 
      AND ff.db_source_sk =dd.db_source_sk 
      GROUP BY ff.acct_id LIMIT 10;
      

      mariadb -e "create database test; use test;"
       
      mariadb test -e "CREATE TABLE `dd`( `acct_sk` INT(11) UNSIGNED NOT NULL, `acct_id` VARCHAR(128) NOT NULL DEFAULT 'None', `db_source_sk` INT(11) UNSIGNED NOT NULL) ENGINE=Columnstore DEFAULT CHARSET=utf8mb4;"
      mariadb test -e "CREATE TABLE `ff` ( `db_source_sk` INT(11) UNSIGNED NOT NULL, `acct_id` VARCHAR(128) NOT NULL DEFAULT 'None', `acct_sk` INT(11) UNSIGNED NOT NULL DEFAULT 0 ) ENGINE=Columnstore DEFAULT CHARSET=utf8mb4;"
       
      mariadb test -e "INSERT INTO dd SELECT ROUND(RAND() * 10, 2), substring(MD5(RAND()),1,1), ROUND(RAND() * 100, 2) FROM seq_1_to_300000; "
      mariadb test -e "INSERT INTO ff SELECT ROUND(RAND() * 10, 2), substring(MD5(RAND()),1,1), ROUND(RAND() * 100, 2) FROM seq_1_to_300000;"
      
      

      Attachments

        Issue Links

          Activity

            People

              drrtuy Roman
              edward Edward Stoever
              Daniel Lee Daniel Lee (Inactive)
              Votes:
              1 Vote for this issue
              Watchers:
              8 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved:

                Git Integration

                  Error rendering 'com.xiplink.jira.git.jira_git_plugin:git-issue-webpanel'. Please contact your Jira administrators.