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MXS-3038: Don't connect to lagging slaves

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There's no use connecting to a lagging slave if a replication lag limit
has been set.
This commit is contained in:
Markus Mäkelä
2020-07-03 08:28:33 +03:00
parent 9e91cfdded
commit 4fe71b41ed
1 changed files with 2 additions and 1 deletions
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3
server/modules/routing/readwritesplit/rwsplit_select_backends.cc
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@ -507,7 +507,8 @@ bool RWSplitSession::open_connections()
for (auto& backend : m_raw_backends) for (auto& backend : m_raw_backends)
{ {
if (!backend->in_use() && backend->can_connect() && valid_for_slave(backend, master) if (!backend->in_use() && backend->can_connect() && valid_for_slave(backend, master)
&& backend->server()->rank() == current_rank) && backend->server()->rank() == current_rank
&& rpl_lag_is_ok(backend, get_max_replication_lag()))
{ {
candidates.push_back(backend); candidates.push_back(backend);
} }