If I understand correctly the problem is somewhere near line 757 of /usr/src/usr.sbin/portsnap/portsnap.sh script:

```
# Update metadata without patches
    join -t '|' -v 2 tINDEX tINDEX.new |
        cut -f 2 -d '|' /dev/stdin patchlist |
        while read Y; do
            if [ ! -f "files/${Y}.gz" ]; then 
                echo ${Y};
            fi
        done > filelist
    echo -n "Fetching `wc -l < filelist | tr -d ' '` "
    echo ${NDEBUG} "metadata files... "
    lam -s "f/" - -s ".gz" < filelist |
        xargs ${XARGST} ${PHTTPGET} ${SERVERNAME}   \
        2>${QUIETREDIR}
```

Frankly I don't see anything suspicious. Just in case I added `sleep 1` before `lam ...` line. I let you know whether it helps shortly.

Well, so far there is no such issue with patched portsnap: http://afiskon.ru/s/45/221bf5393f_log.txt I will keep you informed.

So far so good. Patched version works as expected.

Comment 4 Colin Percival 2016-12-26 22:44:09 UTC

Should be fixed by ports r423733, which eliminates the potential for two index files to be identical.