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Fix total order BF abort

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Streaming rollback for total order BF abort used regular
BF abort codepath, which was not correct because the streaming
rollback must fully complete before total order operation executes.
Fixed this by adjusting bf_aborted_in_total_order_
before streaming_rollback() gets called.
This commit is contained in:
Teemu Ollakka
2023-03-02 08:24:44 +02:00
parent 7843345a19
commit 19eaed587c
4 changed files with 45 additions and 4 deletions
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17
src/transaction.cpp
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@ -749,6 +749,12 @@ int wsrep::transaction::after_rollback()
assert(state() == s_aborting ||
state() == s_must_replay);
// Note that it would be technically more correct to
// remove fragments after TOI BF abort in before_rollback(),
// it seems to cause deadlocks and is done here instead.
// We assume that the application does not let the TOI
// to proceed until this method returns, e.g. by holding
// MDL locks. It is not clear how to enforce that though.
if (is_streaming() && bf_aborted_in_total_order_)
{
lock.unlock();
@ -1083,10 +1089,15 @@ bool wsrep::transaction::total_order_bf_abort(
wsrep::unique_lock<wsrep::mutex>& lock WSREP_UNUSED,
wsrep::seqno bf_seqno)
{
/* We must set this flag before entering bf_abort() in order
* to streaming_rollback() work correctly. The flag will be
* unset if BF abort was not allowed. Note that we rely in
* bf_abort() not to release lock if the BF abort is not allowed. */
bf_aborted_in_total_order_ = true;
bool ret(bf_abort(lock, bf_seqno));
if (ret)
if (not ret)
{
bf_aborted_in_total_order_ = true;
bf_aborted_in_total_order_ = false;
}
return ret;
}
@ -1953,7 +1964,9 @@ void wsrep::transaction::streaming_rollback(
if (bf_aborted_in_total_order_)
{
lock.unlock();
server_service_.debug_sync("wsrep_streaming_rollback");
client_state_.server_state_.stop_streaming_client(&client_state_);
// Fragments are removed in after_rollback().
lock.lock();
}
else