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Merge branch '2.3' into develop

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This commit is contained in:
Markus Mäkelä
2019-01-16 16:26:00 +02:00
parent d4674faa7d ba393dbfb2
commit a3fa2f8111
13 changed files with 141 additions and 94 deletions
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47
server/core/dcb.cc
View File

@ -65,6 +65,12 @@ using std::string;
#define DCB_EH_NOTICE(s, p)
#endif
#ifdef EPOLLRDHUP
constexpr uint32_t poll_events = EPOLLIN | EPOLLOUT | EPOLLRDHUP | EPOLLHUP | EPOLLET;
#else
constexpr uint32_t poll_events = EPOLLIN | EPOLLOUT | EPOLLHUP | EPOLLET;
#endif
namespace
{
@ -2364,6 +2370,7 @@ static void dcb_add_to_list(DCB* dcb)
}
else
{
mxb_assert(this_unit.all_dcbs[id]->thread.tail->thread.next != dcb);
this_unit.all_dcbs[id]->thread.tail->thread.next = dcb;
this_unit.all_dcbs[id]->thread.tail = dcb;
}
@ -2530,6 +2537,8 @@ void dcb_foreach_local(bool (* func)(DCB* dcb, void* data), void* data)
{
if (dcb->session)
{
mxb_assert(dcb->thread.next != dcb);
if (!func(dcb, data))
{
break;
@ -3052,13 +3061,7 @@ int poll_add_dcb(DCB* dcb)
{
dcb_sanity_check(dcb);
uint32_t events = 0;
#ifdef EPOLLRDHUP
events = EPOLLIN | EPOLLOUT | EPOLLRDHUP | EPOLLHUP | EPOLLET;
#else
events = EPOLLIN | EPOLLOUT | EPOLLHUP | EPOLLET;
#endif
uint32_t events = poll_events;
/** Choose new state and worker thread ID according to the role of DCB. */
dcb_state_t new_state;
@ -3190,13 +3193,23 @@ DCB* dcb_get_current()
static int upstream_throttle_callback(DCB* dcb, DCB_REASON reason, void* userdata)
{
DCB* client_dcb = dcb->session->client_dcb;
mxb::Worker* worker = static_cast<mxb::Worker*>(client_dcb->owner);
// The fd is removed manually here due to the fact that poll_add_dcb causes the DCB to be added to the
// worker's list of DCBs but poll_remove_dcb doesn't remove it from it. This is due to the fact that the
// DCBs are only removed from the list when they are closed.
if (reason == DCB_REASON_HIGH_WATER)
{
poll_remove_dcb(client_dcb);
MXS_INFO("High water mark hit for '%s'@'%s', not reading data until low water mark is hit",
client_dcb->user, client_dcb->remote);
worker->remove_fd(client_dcb->fd);
client_dcb->state = DCB_STATE_NOPOLLING;
}
else if (reason == DCB_REASON_LOW_WATER)
{
poll_add_dcb(client_dcb);
MXS_INFO("Low water mark hit for '%s'@'%s', accepting new data", client_dcb->user, client_dcb->remote);
worker->add_fd(client_dcb->fd, poll_events, (MXB_POLL_DATA*)client_dcb);
client_dcb->state = DCB_STATE_POLLING;
}
return 0;
@ -3208,7 +3221,13 @@ bool backend_dcb_remove_func(DCB* dcb, void* data)
if (dcb->session == session && dcb->role == DCB::Role::BACKEND)
{
poll_remove_dcb(dcb);
DCB* client_dcb = dcb->session->client_dcb;
MXS_INFO("High water mark hit for connection to '%s' from %s'@'%s', not reading data until low water "
"mark is hit", dcb->server->name(), client_dcb->user, client_dcb->remote);
mxb::Worker* worker = static_cast<mxb::Worker*>(dcb->owner);
worker->remove_fd(dcb->fd);
dcb->state = DCB_STATE_NOPOLLING;
}
return true;
@ -3220,7 +3239,13 @@ bool backend_dcb_add_func(DCB* dcb, void* data)
if (dcb->session == session && dcb->role == DCB::Role::BACKEND)
{
poll_add_dcb(dcb);
DCB* client_dcb = dcb->session->client_dcb;
MXS_INFO("Low water mark hit for connection to '%s' from '%s'@'%s', accepting new data",
dcb->server->name(), client_dcb->user, client_dcb->remote);
mxb::Worker* worker = static_cast<mxb::Worker*>(dcb->owner);
worker->add_fd(dcb->fd, poll_events, (MXB_POLL_DATA*)dcb);
dcb->state = DCB_STATE_POLLING;
}
return true;

14
server/core/queryclassifier.cc
View File

@ -390,8 +390,18 @@ uint32_t QueryClassifier::ps_get_type(std::string id) const
void QueryClassifier::ps_erase(GWBUF* buffer)
{
m_ps_handles.erase(qc_mysql_extract_ps_id(buffer));
m_sPs_manager->erase(buffer);
if (qc_mysql_is_ps_command(mxs_mysql_get_command(buffer)))
{
// Erase the type of the statement stored with the internal ID
m_sPs_manager->erase(ps_id_internal_get(buffer));
// ... and then erase the external to internal ID mapping
m_ps_handles.erase(qc_mysql_extract_ps_id(buffer));
}
else
{
// Not a PS command, we don't need the ID mapping
m_sPs_manager->erase(buffer);
}
}
bool QueryClassifier::query_type_is_read_only(uint32_t qtype) const

3
server/modules/protocol/MySQL/mariadbbackend/mysql_backend.cc
View File

@ -1441,7 +1441,8 @@ static int backend_write_delayqueue(DCB* dcb, GWBUF* buffer)
if (rc == 0)
{
do_handle_error(dcb, ERRACT_NEW_CONNECTION, "Lost connection to backend server.");
do_handle_error(dcb, ERRACT_NEW_CONNECTION,
"Lost connection to backend server while writing delay queue.");
}
return rc;

9
server/modules/routing/readwritesplit/readwritesplit.hh
View File

@ -417,3 +417,12 @@ mxs::PRWBackends::iterator find_best_backend(mxs::PRWBackends& backends,
* The following are implemented in rwsplit_tmp_table_multi.c
*/
void close_all_connections(mxs::PRWBackends& backends);
/**
* Utility function for extracting error messages from buffers
*
* @param buffer Buffer containing an error
*
* @return String representation of the error
*/
std::string extract_error(GWBUF* buffer);

1
server/modules/routing/readwritesplit/rwsplit_route_stmt.cc
View File

@ -449,6 +449,7 @@ bool RWSplitSession::route_session_write(GWBUF* querybuf, uint8_t command, uint3
}
else if (qc_query_is_type(type, QUERY_TYPE_DEALLOC_PREPARE))
{
mxb_assert(!mxs_mysql_is_ps_command(m_qc.current_route_info().command()));
m_qc.ps_erase(querybuf);
}

13
server/modules/routing/readwritesplit/rwsplit_session_cmd.cc
View File

@ -29,19 +29,24 @@ using namespace maxscale;
*/
static std::string extract_error(GWBUF* buffer)
std::string extract_error(GWBUF* buffer)
{
std::string rval;
if (MYSQL_IS_ERROR_PACKET(((uint8_t*)GWBUF_DATA(buffer))))
{
size_t replylen = MYSQL_GET_PAYLOAD_LEN(GWBUF_DATA(buffer));
size_t replylen = MYSQL_GET_PAYLOAD_LEN(GWBUF_DATA(buffer)) + MYSQL_HEADER_LEN;
char replybuf[replylen];
gwbuf_copy_data(buffer, 0, sizeof(replybuf), (uint8_t*)replybuf);
std::string err;
std::string msg;
err.append(replybuf + 8, 5);
msg.append(replybuf + 13, replylen - 4 - 5);
/**
* The payload starts with a one byte command followed by a two byte error code, a six byte state and
* a human-readable string that spans the rest of the packet.
*/
err.append(replybuf + MYSQL_HEADER_LEN + 3, 6);
msg.append(replybuf + MYSQL_HEADER_LEN + 3 + 6, replylen - MYSQL_HEADER_LEN - 3 - 6);
rval = err + ": " + msg;
}

5
server/modules/routing/readwritesplit/rwsplitsession.cc
View File

@ -941,7 +941,10 @@ void RWSplitSession::handleError(GWBUF* errmsgbuf,
}
else
{
MXS_ERROR("Lost connection to the master server, closing session.%s", errmsg.c_str());
int64_t idle = mxs_clock() - backend->dcb()->last_read;
MXS_ERROR("Lost connection to the master server, closing session.%s "
"Connection has been idle for %.1f seconds. Error caused by: %s",
errmsg.c_str(), (float)idle / 10.f, extract_error(errmsgbuf).c_str());
}
}