The test case covers a few bugs that were fixed by the previous
commits. The first part of the test covers the case when master
reconnection fails while session command history is being executed. The
second part of the test makes sure exceeding the session command history
will prevent master reconnections from taking place.
The test now uses standard library threads and lambda functions to make
the code simpler. Also made the test more robust by ignoring any errors
that are caused by the exhaustion of available client side TCP ports.
The hard limit of 10 seconds is too strict when taking into account the
fact that infinite refreshes was possible before the bug was fixed. This
also makes testing a lot easier where rapid reloads are necessary.
Certain MariaDB connectors will use the direct execution for batching
COM_STMT_PREPARE and COM_STMT_EXECUTE execution without waiting for the
COM_STMT_PREPARE to complete. In these cases the COM_STMT_EXECUTE (and
other COM_STMT commands as well) will use the special ID 0xffffffff. When
this is detected, it should be substituted with the ID of the latest
statement that was prepared.
By injecting messages into the maxscale.log from the test, the reader of
the log can easily see the "synchronization" with the test case. This does
affect the test timing so it can only be used to see whether non-timing
related functionality is correct.
The test appears to fail when the throttling is unable to keep the QPS
high enough for the test to pass. To reduce the likelihood of this, lower
the limit to 500 QPS.
In theory, the minimum delay of one millisecond in the delayed_call limits
the filter to a maximum QPS of 1000 as each query would wait for at least
a millisecond before being routed. This is yet to be proven but it would
explain why the tests are having a hard time approaching that level of
QPS.
Syncing the slaves should prevent replication lag from affecting the
test. The added logging will help determine what the error was that caused
the failure.
Very simple, creates 10 threads that concurrently starts making
simple INSERTs and SELECTs. The purpose is to test that the basic
router to router mechanism of smartrouter works.
