sort-merge-fdlimit.log ( failed)

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

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