Im using Logstash 5.6 and it is continuously restarting the process after every 12 sec, while starting with "systemctl start logstash". if im starting "bin/logstash --path.settings /etc/logstash" it is working properly.
[2019-01-20T22:42:54,335][INFO ][logstash.modules.scaffold] Initializing module {:module_name=>"netflow", :directory=>"/usr/share/logstash/modules/netflow/configuration"}
[2019-01-20T22:42:54,345][FATAL][logstash.runner ] An unexpected error occurred! {:error=>#<ArgumentError: Path "/var/lib/logstash/queue" must be a writable directory. It is not writable.>, :backtrace=>["/usr/share/logstash/logstash-core/lib/logstash/settings.rb:439:in validate'", "/usr/share/logstash/logstash-core/lib/logstash/settings.rb:222:invalidate_value'", "/usr/share/logstash/logstash-core/lib/logstash/settings.rb:138:in validate_all'", "org/jruby/RubyHash.java:1342:ineach'", "/usr/share/logstash/logstash-core/lib/logstash/settings.rb:137:in validate_all'", "/usr/share/logstash/logstash-core/lib/logstash/runner.rb:243:inexecute'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/clamp-0.6.5/lib/clamp/command.rb:67:in run'", "/usr/share/logstash/logstash-core/lib/logstash/runner.rb:204:inrun'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/clamp-0.6.5/lib/clamp/command.rb:132:in run'", "/usr/share/logstash/lib/bootstrap/environment.rb:71:in(root)'"]}
[2019-01-20T22:43:06,001][INFO ][logstash.modules.scaffold] Initializing module {:module_name=>"fb_apache", :directory=>"/usr/share/logstash/modules/fb_apache/configuration"}
[2019-01-20T22:43:06,005][INFO ][logstash.modules.scaffold] Initializing module {:module_name=>"netflow", :directory=>"/usr/share/logstash/modules/netflow/configuration"}
[2019-01-20T22:43:06,014][FATAL][logstash.runner ] An unexpected error occurred! {:error=>#<ArgumentError: Path "/var/lib/logstash/queue" must be a writable directory. It is not writable.>, :backtrace=>["/usr/share/logstash/logstash-core/lib/logstash/settings.rb:439:in validate'", "/usr/share/logstash/logstash-core/lib/logstash/settings.rb:222:invalidate_value'", "/usr/share/logstash/logstash-core/lib/logstash/settings.rb:138:in validate_all'", "org/jruby/RubyHash.java:1342:ineach'", "/usr/share/logstash/logstash-core/lib/logstash/settings.rb:137:in validate_all'", "/usr/share/logstash/logstash-core/lib/logstash/runner.rb:243:inexecute'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/clamp-0.6.5/lib/clamp/command.rb:67:in run'", "/usr/share/logstash/logstash-core/lib/logstash/runner.rb:204:inrun'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/clamp-0.6.5/lib/clamp/command.rb:132:in run'", "/usr/share/logstash/lib/bootstrap/environment.rb:71:in(root)'"]}
[2019-01-20T22:43:17,887][INFO ][logstash.modules.scaffold] Initializing module {:module_name=>"fb_apache", :directory=>"/usr/share/logstash/modules/fb_apache/configuration"}
[2019-01-20T22:43:17,891][INFO ][logstash.modules.scaffold] Initializing module {:module_name=>"netflow", :directory=>"/usr/share/logstash/modules/netflow/configuration"}
[2019-01-20T22:43:17,900][FATAL][logstash.runner ] An unexpected error occurred! {:error=>#<ArgumentError: Path "/var/lib/logstash/queue" must be a writable directory. It is not writable.>, :backtrace=>["/usr/share/logstash/logstash-core/lib/logstash/settings.rb:439:in validate'", "/usr/share/logstash/logstash-core/lib/logstash/settings.rb:222:invalidate_value'", "/usr/share/logstash/logstash-core/lib/logstash/settings.rb:138:in validate_all'", "org/jruby/RubyHash.java:1342:ineach'", "/usr/share/logstash/logstash-core/lib/logstash/settings.rb:137:in validate_all'", "/usr/share/logstash/logstash-core/lib/logstash/runner.rb:243:inexecute'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/clamp-0.6.5/lib/clamp/command.rb:67:in run'", "/usr/share/logstash/logstash-core/lib/logstash/runner.rb:204:inrun'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/clamp-0.6.5/lib/clamp/command.rb:132:in run'", "/usr/share/logstash/lib/bootstrap/environment.rb:71:in(root)'"]}
Please help me on this.