sort-merge-fdlimit.log ( failed)

FAIL: tests/sort/sort-merge-fdlimit
===================================

10
5
3
1
13
17
6
12
9
15
16
4
8
7
14
11
2
sort: failed to open temporary file: Too many open files
FAIL tests/sort/sort-merge-fdlimit.sh (exit status: 1)