Merge pull request ClickHouse#79804 from ClickHouse/ncb/fix-flake-02935

fix flaky test 02935_http_content_type_with_http_headers_progress

Author: bharatnc

tests/queries/0_stateless/02935_http_content_type_with_http_headers_progress.sh

@@ -4,10 +4,12 @@ CURDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
 # shellcheck source=../shell_config.sh
 . "$CURDIR"/../shell_config.sh
 
-for frmt in TSV TabSeparatedWithNamesAndTypes CSV CSVWithNames Null Native RowBinary JSONStrings JSON JSONEachRow Values Vertical
+THREADS=$(nproc)
+
+for format in TSV TabSeparatedWithNamesAndTypes CSV CSVWithNames Null Native RowBinary JSONStrings JSON JSONEachRow Values Vertical
 do
-  echo $frmt
-  url="${CLICKHOUSE_URL}/?http_headers_progress_interval_ms=1&send_progress_in_http_headers=true&query=select+sleepEachRow(0.01)from+numbers(10)+FORMAT+${frmt}"
-  (seq 1 200| xargs -n1 -P0 -Ixxx curl -Ss -v -o /dev/null ${url} 2>&1|grep -Eo " Content-Type:.*$")|strings|sort -u
+  echo $format
+  url="${CLICKHOUSE_URL}/?http_headers_progress_interval_ms=1&send_progress_in_http_headers=true&query=select+sleepEachRow(0.01)from+numbers(10)+FORMAT+${format}"
+  (seq 1 ${THREADS} | xargs --max-args=1 -P"${THREADS}" -Ixxx curl -Ss -v -o /dev/null ${url} 2>&1 | grep -P -o " Content-Type:.*$") | strings | sort -u
 done