Logstash re-open logfile with SIGHUP

Elastic Stack Logstash
1

I'm running logstash via the apt installed package on Ubuntu.

I am sending a SIGHUP to the process and it's not re-opening its logfiles.

dpkg -l | grep logstash
ii logstash 1:2.3.4-1 all An extensible logging pipeline

If I do

ps -ef | grep logstash

I get

logstash 11786 1 12 11:54 pts/6 00:00:16 /usr/bin/java -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -Djava.awt.headless=true -XX:CMSInitiatingOccupancyFraction=75 -XX:+UseCMSInitiatingOccupancyOnly -XX:+HeapDumpOnOutOfMemoryError -Djava.io.tmpdir=/var/lib/logstash -Xmx1g -Xss2048k -Djffi.boot.library.path=/opt/logstash/vendor/jruby/lib/jni -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -Djava.awt.headless=true -XX:CMSInitiatingOccupancyFraction=75 -XX:+UseCMSInitiatingOccupancyOnly -XX:+HeapDumpOnOutOfMemoryError -Djava.io.tmpdir=/var/lib/logstash -XX:HeapDumpPath=/opt/logstash/heapdump.hprof -Xbootclasspath/a:/opt/logstash/vendor/jruby/lib/jruby.jar -classpath : -Djruby.home=/opt/logstash/vendor/jruby -Djruby.lib=/opt/logstash/vendor/jruby/lib -Djruby.script=jruby -Djruby.shell=/bin/sh org.jruby.Main --1.9 /opt/logstash/lib/bootstrap/environment.rb logstash/runner.rb agent -f /etc/logstash/conf.d -l /var/log/logstash/logstash.log --quiet

And if I do kill -1 11786 nothing happens. Any ideas?

2

I'm not sure SIGHUP is supposed to make it reopen its log files. The only documented behavior AFAIK is that the config files should be reloaded.