This change is needed for custom provider implementations to
have a way to access the victim in the application context.
Helper interface operation_context to pass caller context for
service/provider callbacks in more type safe way.
Provider position is needed in coordinated recovery
between application and provider. Pass the position
info from provider to application to allow making
it durable.
This allows injecting an application allocated provider into
server_state.
After this virtual provider getter is unnecessary. Made the getter
normal method and fixed unit tests accordingly.
Attempt to append keys while transaction is not active results in
creating a transaction handle with id -1 (undefined).
Assert that the transaction is `active()` before appending keys.
Same for appending data.
for SYNCED event as expected.
2. Fix transition to `s_joined` only after we have a complete state.
Complete state is reached in the following 3 cases:
- SST seqno exceeds connected seqno
- view seqno equals connected seqno (view processed == view connected)
- current state is `s_donor`
Refs codership/wsrep-lib#175
The fallthrough comment is not enough to silence the warning
with -Wimplicit-fallthrough=5.
This commit also fixes submodule handling in github actions.
This patch introduces a queue to store ids of transactions that failed
to send a rollback fragment in streaming_rollback(). This is to avoid
potentially missed rollback fragments when a cluster splits and then
later reforms. Rollback fragments would be missing if a node rolled
back a transaction locally (either BFed or voluntary rollback) while
non-primary, and the attempt to send rollback fragment failed in
transaction::streaming_rollback().
Transaction that fail to send rollback fragment can proceed to
rollback locally. However we must ensure that rollback fragments for
those transactions are eventually delivered by the cluster. This must
be done before a potentially conflicting writeset causes BF-BF
conflicts in the rest of the cluster.
Handle the case were prepare is bf aborted after it has replicated a
fragment, and before the command finishes in
after_command_before_result() and after_command_after_result() hooks.
Assertion is_streaming() fires in transaction::adopt() when a
transaction is BF aborted, while it is in s_executing state, and it
manages to complete rollback and cleanup while the BF aborter is
executing streaming_rollback() with client_state lock is unlocked.
In this case method transaction::adopt() finds a transaction that is
no longer marked as streaming, triggering the assertion.
A condition variable and flag streaming_rollback_in_progress_ now
prevents a client thread to finish rollback, even if the BF aborter
has temporarily unlocked the client_state lock.
Remove the method as it does nothing, except for calling
`streaming_context_.clear()`. This led to a situation where we have
two ways to do the same thing, and it is annoying, if one wants to search
for all places where streaming_context is cleaned up.
Remove `flags` local variable and use flags_ member in
transaction::commit_or_rollback_by_xid(). This avoids a case where the
pa_unsafe flag was not passed to provider.
The new feature which allows application to set transaction as PA unsafe
caused problems for streaming replication use cases. In apply_write_set(),
it is assumed that write set flags must be 0 for existing streaming
replication transaction. However, if SR transaction modifies non PK table,
the replicated fragment may have pa_unsafe flag.
Fixed by changing the condition detecting SR transactions to accept pa_unsafe
flag. This avoids the apply_write_set() execution from falling down to assert(0)
in the "condition tree"
Resetting pa_unsafe flag after fragment certification. If the flag is not reset,
it would remain in effect until the end of the transaction. However, the PA safety
should be inspected only during fragment applying time.
* Removed transaction::p_unsafe_ member
* Changed transaction::pa_unsafe(bool) to modify flags member directly
* Modified transaction.cpp to use transaction.pa_unsafe(bool) rather than
directly changing transaction's flag
* added method mark_transaction_pa_unsafe() for client_state,
application will use this
Client state end_rsu() didn't reset toi_mode to m_undefined,
which caused an assertion when NBO was started after RSU.
As a fix, reset toi_mode to m_undefined in end_rsu() after
changing mode.
This commit defines a TLS service interface. If the implementation is
provided by the application when the provider is loaded, appropriate
hooks are probed from the provider and the provider side hooks are
initialized after the provider is loaded.
A sample implementation to demostrate the use of TLS interface
is provided in dbsim/db_tls.cpp.
Also contains a change to thread service interface: The
thread exit virtual method was changed to function pointer
to allow thread exit path which does not involve C++.
The method takes already locked lock object as an argument.
The caller must ensure that the lock object owns the underlying mutex.
Replaced homegrown wsrep::unique_lock with type alias from
std::unique_lock.
This patch adds the possibility to have client commands that do not
return results from DBMS. While processing such commands we must be
able to preserve errors until the next interaction with client.
Specifically if the transaction is bf aborted while processing such
a non-returning command, then we have to keep the deadlock error until
the client issues a command that may return the error.
To handle such cases, client_state::before_command() now takes
parameter keep_command_error. The DBMS is supposed set
keep_command_error true to instruct wsrep-lib to preserve errors (if
any) until the next command which sets keep_command_error false.
Dealing with a case where current client command does not return result.
Work in progress.
Fix typo and add assertions in keep_command_error()
Make keep_command_error a parameter to before_commit()
Fix comment about keep_command_error
Handle keep_command_error with s_must_abort in wsrep_before_command()
Fix unit test
* Added unit tests for transaction::xa_detach() and
transaction::xa_replay()
* Added unit tests for wsrep::xid
* Fixed minor issues pointed out by reviewer
