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Use Backend::write for all writes in schemarouter

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The schemarouter should always use Backend::write for communication with
the backend servers. This keeps the backends in the correct state.

This fix solves some of the random test failures in the `sharding` test.
This commit is contained in:
Markus Mäkelä
2017-07-12 07:41:41 +03:00
parent 62fdda8534
commit c7a45466fb
2 changed files with 15 additions and 11 deletions
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11
server/modules/routing/schemarouter/schemaroutersession.cc
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@ -473,10 +473,10 @@ void SchemaRouterSession::handle_mapping_reply(SSRBackend& bref, GWBUF** pPacket
rc = -1;
}
}
if (m_queue.size() && rc != -1)
else if (m_queue.size() && rc != -1)
{
ss_dassert(m_state == INIT_READY || m_state == INIT_USE_DB);
MXS_INFO("Routing stored query");
route_queued_query();
}
}
@ -943,11 +943,13 @@ bool SchemaRouterSession::handle_default_db()
data[3] = 0x0;
data[4] = 0x2;
memcpy(data + 5, m_connect_db.c_str(), qlen);
SSRBackend backend;
DCB* dcb = NULL;
if (get_shard_dcb(&dcb, target->unique_name))
if (get_shard_dcb(&dcb, target->unique_name) &&
(backend = get_bref_from_dcb(dcb)))
{
dcb->func.write(dcb, buffer);
backend->write(buffer);
MXS_DEBUG("USE '%s' sent to %s for session %p",
m_connect_db.c_str(),
target->unique_name,
@ -1020,6 +1022,7 @@ int SchemaRouterSession::inspect_mapping_states(SSRBackend& bref,
if (rc == SHOWDB_FULL_RESPONSE)
{
(*it)->set_mapped(true);
(*it)->ack_write();
MXS_DEBUG("Received SHOW DATABASES reply from %s for session %p",
(*it)->backend()->server->unique_name,
m_client->session);