[MADLIB-1291] madlib.dist_jaccard abnormal for not releasing the memory

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: v1.16
• Component/s: Module: Linear-Algebra Functions
• Assignee: Unassigned
• Reporter: astronee jin
• Created: 08/Jan/19 09:18
• Updated: 25/Jun/19 16:59
• Resolved: 25/Jun/19 16:59

Description

the bug was found by: http://www.wotung.com   or http://www.china-para.com

when running the following test

/usr/local/madlib/bin/madpack -s madlib -p hawq -c gpadmin@localhost:5432/postgres -t linalg install-check

the programe will quit abnoramlly, 

the case fails even by manual inputing:
postgres=# select madlib.dist_jaccard('{1,-2,3}','{4,-5,6}');
server closed the connection unexpectedly
        This probably means the server terminated abnormally
        before or while processing the request.
The connection to the server was lost. Attempting reset: Failed.

after the Analysis, we think the servingp process received the abormal SIGNAL and quit, it's from abort() function. the client connection is lost too.

 

when debugging into function Dist.Jaccard, the memory is not released explicitly, after add the following and recomplie:
 

x_set.clear();
y_set.clear();
 
we can execute the following and not abormal from the function of distJaccard：
postgres=# select madlib.dist_jaccard('{1,-2,3}','{4,-5,6}');
 dist_jaccard
--------------
            1
(1 row)