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Code Activity

Refactored checks for transaction state before certification

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Moved the check for transaction state before certification step
into separate method abort_or_interrupted() which will check the state
and adjust state and client_state error status accordingly.

Moved the check for abort_or_interrupted() to happen before
the state is changed to certifying and write set data is appended.
This makes the check atomic and reduces the probability of race
conditions. After this check we rely on provider side transaction
state management and error reporting until the certification step
is over.

Change to public API: Pass client_state mutex wrappend in unique_lock
object to client_service::interrupted() call. This way the DBMS side
has a control to the lock object in case it needs to unlock it
temporarily. The underlying mutex will always be locked when the lock
object is passed via interrupted() call.

Other: Allow server_state change from donor to connected. This may
happen if the joiner crashes during SST and the provider reports
it before the DBMS side SST mechanism detects the error.
This commit is contained in:
Teemu Ollakka
2019-02-19 22:26:45 +02:00
parent ab0e5f5d77
commit 49deb7da98
6 changed files with 56 additions and 41 deletions
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2
src/server_state.cpp
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@ -1153,7 +1153,7 @@ void wsrep::server_state::state(
{ 1, 0, 0, 1, 1, 0, 0, 1, 1}, /* cted */
{ 1, 1, 0, 0, 0, 1, 0, 0, 1}, /* jer */
{ 1, 0, 0, 1, 0, 0, 1, 1, 1}, /* jed */
{ 1, 0, 0, 0, 0, 1, 0, 0, 1}, /* dor */
{ 1, 0, 0, 1, 0, 1, 0, 0, 1}, /* dor */
{ 1, 0, 0, 1, 0, 1, 1, 0, 1}, /* sed */
{ 1, 0, 0, 0, 0, 0, 0, 0, 0} /* ding */
};