[SCM] Samba Shared Repository - branch master updated

[Martin Schwenke]

The branch, master has been updated
       via  6e419dda718 ctdb: increase TasksMax limit, the systemd default is just 512
      from  393da520e43 s3: libsmbclient: Finish unifing bad iconv behavior across CORE NT1 SMB2 protocols.

https://git.samba.org/?p=samba.git;a=shortlog;h=master


- Log -----------------------------------------------------------------
commit 6e419dda718cdb931f1d7d30926ed418a169415f
Author: Ralph Boehme <slow at samba.org>
Date:   Tue May 12 15:30:05 2020 +0200

    ctdb: increase TasksMax limit, the systemd default is just 512
    
    In 2015 systemd introduced a TasksMax which limits the number of processes in a
    unit:
    
    https://lists.freedesktop.org/archives/systemd-devel/2015-November/035006.html
    
    The default of 512 may be too low in certain situations leading to vfork()
    failing with errno=EAGAIN when trying to spawn lock-helper processes.
    
    With the default for LockProcessesPerDB being 200 the increased TasksMax limit
    should cover the problematic scenario.
    
    Additional background: the failing vfork()s have been seen on production
    clusters and were tracked down to being logged in the context of ctdb calling
    tdb_repack().
    
    Links:
    
    https://github.com/systemd/systemd/commit/9ded9cd14cc03c67291b10a5c42ce5094ba0912f
    https://www.suse.com/support/kb/doc/?id=000015901
    https://success.docker.com/article/how-to-reserve-resource-temporarily-unavailable-errors-due-to-tasksmax-setting
    https://www.percona.com/blog/2019/01/02/tasksmax-another-setting-that-can-cause-mysql-error-messages/
    
    Signed-off-by: Ralph Boehme <slow at samba.org>
    Reviewed-by: Martin Schwenke <martin at meltin.net>
    
    Autobuild-User(master): Martin Schwenke <martins at samba.org>
    Autobuild-Date(master): Wed May 13 13:30:12 UTC 2020 on sn-devel-184

-----------------------------------------------------------------------

Summary of changes:
 ctdb/config/ctdb.service | 1 +
 1 file changed, 1 insertion(+)


Changeset truncated at 500 lines:

diff --git a/ctdb/config/ctdb.service b/ctdb/config/ctdb.service
index fd81c38e26d..dbe35281f56 100644
--- a/ctdb/config/ctdb.service
+++ b/ctdb/config/ctdb.service
@@ -8,6 +8,7 @@ ConditionFileNotEmpty=/etc/ctdb/nodes
 Type=forking
 LimitCORE=infinity
 LimitNOFILE=1048576
+TasksMax=4096
 PIDFile=/run/ctdb/ctdbd.pid
 ExecStart=/usr/sbin/ctdbd_wrapper start
 ExecStop=/usr/sbin/ctdbd_wrapper stop


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Samba Shared Repository