Hello,

When I run wget with a long list of URIs from a file, after a couple of hundered entries the URI's stop to resolve (the "wget: unable to resolve host address <...>" lines in the log), although they still do if supplied in shorter lists. It's not an issue of the timeout (it is set in the example to 10 seconds just not to wait 15 minutes for each single URI), nor the URI's themselves, which are valid.

wget \
--debug \
--spider \
--no-directories \
--timeout=10 \
--tries=2 \
--input-file="/Users/comp/wget/url-list.txt" \
--output-file="/Users/comp/wget/test-output.txt"

The input and output files are attached.

I'm on MacOS 11.5.2, M1

wget version:
GNU Wget 1.21.2 built on darwin20.6.0.

-cares +digest -gpgme +https +ipv6 +iri +large-file -metalink +nls
+ntlm +opie +psl +ssl/openssl

Wgetrc:
    /opt/homebrew/etc/wgetrc (system)
Locale:
    /opt/homebrew/Cellar/wget/1.21.2/share/locale
Compile:
    clang -DHAVE_CONFIG_H -DSYSTEM_WGETRC="/opt/homebrew/etc/wgetrc"
    -DLOCALEDIR="/opt/homebrew/Cellar/wget/1.21.2/share/locale" -I.
    -I../lib -I../lib -I/opt/homebrew/opt/openssl@1.1/include
    -I/opt/homebrew/Cellar/pcre/8.45/include
    -I/opt/homebrew/Cellar/zlib/1.2.11/include
    -I/opt/homebrew/Cellar/icu4c/69.1/include
    -I/opt/homebrew/Cellar/libpsl/0.21.1_3/include -DNDEBUG -g -O2
Link:
    clang -I/opt/homebrew/Cellar/pcre/8.45/include
    -I/opt/homebrew/Cellar/zlib/1.2.11/include
    -I/opt/homebrew/Cellar/icu4c/69.1/include
    -I/opt/homebrew/Cellar/libpsl/0.21.1_3/include -DNDEBUG -g -O2
    -L/opt/homebrew/Cellar/pcre/8.45/lib -lpcre -lidn2
    -L/opt/homebrew/opt/openssl@1.1/lib -lssl -lcrypto -ldl
    -L/opt/homebrew/Cellar/zlib/1.2.11/lib -lz
    -L/opt/homebrew/Cellar/libpsl/0.21.1_3/lib -lpsl ftp-opie.o
    openssl.o http-ntlm.o ../lib/libgnu.a -liconv -lintl -Wl,-framework
    -Wl,CoreFoundation -lunistring