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Close SR transactions when disconnecting from the group.

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Moved SR fragment removal for total order BFd SR transactions
into after_rollback() call to avoid deadlocking while trying
to access storage before rolling back the transaction.
This commit is contained in:
Teemu Ollakka
2018-07-19 15:13:27 +03:00
parent 61e0e30687
commit 5bf8ad1294
3 changed files with 46 additions and 11 deletions
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32
src/server_state.cpp
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@ -688,6 +688,11 @@ void wsrep::server_state::on_view(const wsrep::view& view,
wsrep::log_info() << "Non-primary view";
if (view.final())
{
assert(high_priority_service);
if (high_priority_service)
{
close_transactions_at_disconnect(*high_priority_service);
}
state(lock, s_disconnected);
}
else if (state_ != s_disconnecting)
@ -698,6 +703,11 @@ void wsrep::server_state::on_view(const wsrep::view& view,
else
{
assert(view.final());
assert(high_priority_service);
if (high_priority_service)
{
close_transactions_at_disconnect(*high_priority_service);
}
wsrep::unique_lock<wsrep::mutex> lock(mutex_);
state(lock, s_disconnected);
id_ = wsrep::id::undefined();
@ -1054,3 +1064,25 @@ void wsrep::server_state::close_foreign_sr_transactions(
}
}
}
void wsrep::server_state::close_transactions_at_disconnect(
wsrep::high_priority_service& high_priority_service)
{
// Close streaming applier without removing fragments
// from fragment storage. When the server is started again,
// it must be able to recover ongoing streaming transactions.
streaming_appliers_map::iterator i(streaming_appliers_.begin());
while (i != streaming_appliers_.end())
{
wsrep::high_priority_service* streaming_applier(i->second);
{
wsrep::high_priority_switch sw(high_priority_service,
*streaming_applier);
streaming_applier->rollback(
wsrep::ws_handle(), wsrep::ws_meta());
streaming_applier->after_apply();
}
streaming_appliers_.erase(i++);
server_service_.release_high_priority_service(streaming_applier);
}
}