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Read recovered position from sst_received() after initialization

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In general the position where the storage recovers after a SST
cannot be known untile the recovery process is over. This in turn
means that the position cannot be known when the server_state
sst_received() method is called. Worked around the problem by
introducing get_position() method into server service which
can be used to get the position from stable storage after SST
has completed and the state has been recovered.
This commit is contained in:
Teemu Ollakka
2019-01-14 13:11:57 +02:00
parent 17fc8c16de
commit 89b3561ad8
8 changed files with 43 additions and 13 deletions
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8
src/server_state.cpp
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@ -524,16 +524,16 @@ void wsrep::server_state::sst_sent(const wsrep::gtid& gtid, int error)
}
void wsrep::server_state::sst_received(wsrep::client_service& cs,
const wsrep::gtid& gtid,
int const error)
{
wsrep::log_info() << "SST received: " << gtid;
wsrep::log_info() << "SST received";
wsrep::gtid gtid(wsrep::gtid::undefined());
wsrep::unique_lock<wsrep::mutex> lock(mutex_);
assert(state_ == s_joiner || state_ == s_initialized);
// Run initialization only if the SST was successful.
// In case of SST failure the system is in undefined state
// may not be recoverable.
// may not be recoverable.
if (error == 0)
{
if (server_service_.sst_before_init())
@ -558,6 +558,8 @@ void wsrep::server_state::sst_received(wsrep::client_service& cs,
"wsrep::sst_received() called before connection to cluster");
}
gtid = server_service_.get_position(cs);
wsrep::log_info() << "Recovered position from storage: " << gtid;
wsrep::view const v(server_service_.get_view(cs, id_));
wsrep::log_info() << "Recovered view from SST:\n" << v;