void
FtsHandleNetFailure(SegmentDatabaseDescriptor ** segDB, int numOfFailed)
{
elog(LOG, "FtsHandleNetFailure: numOfFailed %d", numOfFailed);
FtsReConfigureMPP(true);
ereport(ERROR, (errmsg_internal("MPP detected %d segment failures, system is reconnected", numOfFailed),
errSendAlert(true)));
}
/*
* Reads the GP catalog tables and build a CdbComponentDatabases structure.
* It then converts this to a Gang structure and initializes all the non-connection related fields.
*
* Call this function in GangContext.
* Returns a not-null pointer.
*/
Gang *
buildGangDefinition(GangType type, int gang_id, int size, int content)
{
Gang *newGangDefinition = NULL;
CdbComponentDatabaseInfo *cdbinfo = NULL;
CdbComponentDatabaseInfo *cdbInfoCopy = NULL;
SegmentDatabaseDescriptor *segdbDesc = NULL;
MemoryContext perGangContext = NULL;
int segCount = 0;
int i = 0;
ELOG_DISPATCHER_DEBUG("buildGangDefinition:Starting %d qExec processes for %s gang",
size, gangTypeToString(type));
Assert(CurrentMemoryContext == GangContext);
Assert(size == 1 || size == getgpsegmentCount());
/* read gp_segment_configuration and build CdbComponentDatabases */
cdb_component_dbs = getComponentDatabases();
if (cdb_component_dbs == NULL ||
cdb_component_dbs->total_segments <= 0 ||
cdb_component_dbs->total_segment_dbs <= 0)
insist_log(false, "schema not populated while building segworker group");
/* if mirroring is not configured */
if (cdb_component_dbs->total_segment_dbs == cdb_component_dbs->total_segments)
{
ELOG_DISPATCHER_DEBUG("building Gang: mirroring not configured");
disableFTS();
}
perGangContext = AllocSetContextCreate(GangContext, "Per Gang Context",
ALLOCSET_DEFAULT_MINSIZE,
ALLOCSET_DEFAULT_INITSIZE,
ALLOCSET_DEFAULT_MAXSIZE);
Assert(perGangContext != NULL);
MemoryContextSwitchTo(perGangContext);
/* allocate a gang */
newGangDefinition = (Gang *) palloc0(sizeof(Gang));
newGangDefinition->type = type;
newGangDefinition->size = size;
newGangDefinition->gang_id = gang_id;
newGangDefinition->allocated = false;
newGangDefinition->noReuse = false;
newGangDefinition->dispatcherActive = false;
newGangDefinition->portal_name = NULL;
newGangDefinition->perGangContext = perGangContext;
newGangDefinition->db_descriptors =
(SegmentDatabaseDescriptor *) palloc0(size * sizeof(SegmentDatabaseDescriptor));
/* initialize db_descriptors */
switch (type)
{
case GANGTYPE_ENTRYDB_READER:
cdbinfo = &cdb_component_dbs->entry_db_info[0];
cdbInfoCopy = copyCdbComponentDatabaseInfo(cdbinfo);
segdbDesc = &newGangDefinition->db_descriptors[0];
cdbconn_initSegmentDescriptor(segdbDesc, cdbInfoCopy);
setQEIdentifier(segdbDesc, -1, perGangContext);
break;
case GANGTYPE_SINGLETON_READER:
cdbinfo = findDatabaseInfoBySegIndex(cdb_component_dbs, content);
cdbInfoCopy = copyCdbComponentDatabaseInfo(cdbinfo);
segdbDesc = &newGangDefinition->db_descriptors[0];
cdbconn_initSegmentDescriptor(segdbDesc, cdbInfoCopy);
setQEIdentifier(segdbDesc, -1, perGangContext);
break;
case GANGTYPE_PRIMARY_READER:
case GANGTYPE_PRIMARY_WRITER:
/*
* We loop through the segment_db_info. Each item has a segindex.
* They are sorted by segindex, and there can be > 1 segment_db_info for
* a given segindex (currently, there can be 1 or 2)
*/
for (i = 0; i < cdb_component_dbs->total_segment_dbs; i++)
{
cdbinfo = &cdb_component_dbs->segment_db_info[i];
if (SEGMENT_IS_ACTIVE_PRIMARY(cdbinfo))
{
segdbDesc = &newGangDefinition->db_descriptors[segCount];
cdbInfoCopy = copyCdbComponentDatabaseInfo(cdbinfo);
cdbconn_initSegmentDescriptor(segdbDesc, cdbInfoCopy);
setQEIdentifier(segdbDesc, -1, perGangContext);
segCount++;
}
}
if (size != segCount)
{
FtsReConfigureMPP(false);
elog(ERROR, "Not all primary segment instances are active and connected");
}
break;
default:
Assert(false);
}
ELOG_DISPATCHER_DEBUG("buildGangDefinition done");
MemoryContextSwitchTo(GangContext);
return newGangDefinition;
}
