On Wed, Sep 14, 2016 at 4:36 PM, Ashutosh Sharma <ashu.coe...@gmail.com> wrote: > Hi All, > > Below is the backtrace for the issue reported in my earlier mail [1]. > From the callstack it looks like we are trying to release lock on a > meta page twice in _hash_expandtable(). >
Thanks for the call stack. I think below code in patch is culprit. Here we have already released the meta page lock and then again on failure, we are trying to release it. _hash_expandtable() { .. /* Release the metapage lock, before completing the split. */ _hash_chgbufaccess(rel, metabuf, HASH_READ, HASH_NOLOCK); .. if (!buf_nblkno) { _hash_relbuf(rel, buf_oblkno); goto fail; } .. fail: /* We didn't write the metapage, so just drop lock */ _hash_chgbufaccess(rel, metabuf, HASH_READ, HASH_NOLOCK); } This is a problem of concurrent hash index patch. I will send the fix in next version of the patch. -- With Regards, Amit Kapila. EnterpriseDB: http://www.enterprisedb.com -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers