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Flush logical mapping files with fd opened for read/write at checkpoint 

The file descriptor was opened with read-only to fsync a regular file,
which would cause EBADFD errors on some platforms.

This is similar to the recent fix done by a586cc4b (which was broken by
me with 82a5649), except that I noticed this issue while monitoring the
backend code for similar mistakes.  Backpatch to 9.4, as this has been
introduced since logical decoding exists as of b89e151.

Author: Michael Paquier
Reviewed-by: Andres Freund
Discussion: https://postgr.es/m/20191006045548.GA14532@paquier.xyz
Backpatch-through: 9.4
This commit is contained in:
Michael Paquier 2019-10-09 13:30:43 +09:00
parent 1634d36157
commit b8e19b932a
1 changed files with 2 additions and 1 deletions
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3
src/backend/access/heap/rewriteheap.c
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@ -1280,7 +1280,8 @@ CheckPointLogicalRewriteHeap(void)
}
else
{
int fd = OpenTransientFile(path, O_RDONLY | PG_BINARY);
/* on some operating systems fsyncing a file requires O_RDWR */
int fd = OpenTransientFile(path, O_RDWR | PG_BINARY);
/*
* The file cannot vanish due to concurrency since this function