Percona Server moved to https://jira.percona.com/projects/PS

Test connect_debug is unstable

Bug #1622977 reported by Laurynas Biveinis
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Percona Server moved to https://jira.percona.com/projects/PS
Status tracked in 5.7
5.5
Invalid
Undecided
Unassigned
5.6
Fix Released
Low
Laurynas Biveinis
Percona Server moved to https://jira.percona.com/projects/PS 5.6.33-79.0
5.7
Invalid
Undecided
Unassigned

Bug Description

On 5.6 trunk:

main.connect_debug w3 [ fail ]
        Test ended at 2016-08-31 09:12:25

CURRENT_TEST: main.connect_debug
mysqltest: At line 63: query 'connect con_3, localhost, root' failed: 1040: Too many connections
...

A potential reason is the testcase using processlist to sync whereas the server internally uses the variable exposed as Threads_connected to make the "too many connections decision." Since the connection is removed from processlist before decrementing Threads_connected, this creates a race condition. The 5.7 version of the testcase should be backported which used wait_until_count_sessions.inc (which uses Threads_connected).

Tags: ci upstream
Laurynas Biveinis (laurynas-biveinis)
tags: added: ci upstream
Revision history for this message
Laurynas Biveinis (laurynas-biveinis) wrote :

     https://github.com/percona/percona-server/pull/1000
     https://github.com/percona/percona-server/pull/1001

Revision history for this message
Shahriyar Rzayev (rzayev-sehriyar) wrote :

Percona now uses JIRA for bug reports so this bug report is migrated to: https://jira.percona.com/browse/PS-3556

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