Hi,
I am not able to use the logstash-codec-gzip_lines plugin because it tells me that .gz files are not in gzip format, but if I check the file I find no specific issue:
gunzip -tv sl_trace.trace.gz
sl_trace.trace.gz: OK
gunzip --version
gunzip (gzip) 1.5
Copyright (C) 2007, 2011-2012 Free Software Foundation, Inc.
This is free software. You may redistribute copies of it under the terms of
the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.
There is NO WARRANTY, to the extent permitted by law.
Written by Paul Eggert.
With the following config:
file {
path => "/tmp/traces/sl_*.gz"
codec => "gzip_lines"
type => "sl"
}