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  1. MariaDB MaxScale
  2. MXS-6150

Better error messages for Async Rebuild Server

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Details

    • New Feature
    • Status: Open (View Workflow)
    • Major
    • Resolution: Unresolved
    • 25.10.1
    • None
    • None
    • None

    Description

      I have been working on Async Rebuild Server for 2 days now, and I cannot get it to work. I have excellent notes from previous installs, but now on 25.10.1 on cloud machines something has changed and I cannot tell what it is.

      I have completely disabled the firewall on every host. The only thing that maxscale tells me is:

      2026-02-03 20:30:35   error  : [mariadbmon] Could not parse pid from text 'Agent pid 119188'.
      2026-02-03 20:30:35   error  : [mariadbmon] Could not parse pid from text 'Agent pid 119188 killed'.
      

      From that error, I cannot understand what is causing the failure.

      From the ssh logs on the master (/var/log/auth.log), I see this:

      2026-02-03T20:30:34.591742+00:00 dbc002 sshd[119151]: Accepted publickey for root from 10.6.96.7 port 33104 ssh2: RSA SHA256:I4L8PZ4pRC0apLn43GHPUiFSwTPMNQ2ZvBmB2IsqqyY
      2026-02-03T20:30:34.594160+00:00 dbc002 sshd[119151]: pam_unix(sshd:session): session opened for user root(uid=0) by (uid=0)
      2026-02-03T20:30:34.604881+00:00 dbc002 systemd-logind[837]: New session 1139 of user root.
      2026-02-03T20:30:34.617066+00:00 dbc002 sshd[119151]: pam_env(sshd:session): deprecated reading of user environment enabled
      2026-02-03T20:30:35.093435+00:00 dbc002 sudo:     root : PWD=/root ; USER=root ; COMMAND=/usr/bin/lsof -n -P -i TCP:4444 -s TCP:LISTEN
      2026-02-03T20:30:35.094099+00:00 dbc002 sudo: pam_unix(sudo:session): session opened for user root(uid=0) by (uid=0)
      2026-02-03T20:30:35.115265+00:00 dbc002 sudo: pam_unix(sudo:session): session closed for user root
      2026-02-03T20:30:35.126280+00:00 dbc002 sshd[119151]: pam_unix(sshd:session): session closed for user root
      2026-02-03T20:30:35.131056+00:00 dbc002 systemd-logind[837]: Session 1139 logged out. Waiting for processes to exit.
      2026-02-03T20:30:35.134090+00:00 dbc002 systemd-logind[837]: Removed session 1139.
      

      It appears the command root is running is:

      /usr/bin/lsof -n -P -i TCP:4444 -s TCP:LISTEN
      

      When I run that as root, I get no output, and no error.

      What failed? Why can't the error message in maxscale explain the problem better?

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            Unassigned Unassigned
            edward Edward Stoever
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              Updated:

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