Hi all I found a hawq core dump issue: https://issues.apache.org/jira/browse/HAWQ-1381
Briefly: buffer overflow here: src/backend/access/external/fileam.c:2610 sprintf(extvar->GP_SEGMENT_ID, "%d", GetQEIndex()); GetQEIndex() return -10000 on master and GP_SEGMENT_ID is char[6], no more space for '\0', so it happend. There are two ways to fix it: 1. enlarge GP_SEGMENT_ID buffer, from char[6] to char[7] 2. return other short interger instead of -10000 on master I think 1 is more straight, but have some risks (some callers assume the buffer size). And 2 also seems it's a magic number, may influence many places. Any suggestions? Thanks! -- Regards, Hongxu.
