Logstash : Java HotSpot(TM) 64-Bit Server VM warning: Option UseConcMarkSweepGC was deprecated in version 9.0 and will likely be removed in a future release

Elastic Stack Logstash
1

while shashing first log it show below warning:

/usr/share/logstash# bin/logstash -e 'input { stdin { } } output { stdout {} }'
Java HotSpot(TM) 64-Bit Server VM warning: Option UseConcMarkSweepGC was deprecated in version 9.0 and will likely b e removed in a future release.
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.headius.backport9.modules.Modules (file:/usr/share/logstash/logstash-core/ lib/jars/jruby-complete-9.2.7.0.jar) to field java.io.FileDescriptor.fd
WARNING: Please consider reporting this to the maintainers of com.headius.backport9.modules.Modules
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Thread.exclusive is deprecated, use Thread::Mutex
WARNING: Could not find logstash.yml which is typically located in $LS_HOME/config or /etc/logstash. You can specify the path using --path.settings. Continuing using the defaults
Could not find log4j2 configuration at path /usr/share/logstash/config/log4j2.properties. Using default config which logs errors to the console

Can anyone help into this?

2

You could edit /etc/logstash/jvm.options to configure some GC options that your version of java likes.

3

Hi Badger,

This is my jvm.options file can you help anything ?

JVM configuration

Xms represents the initial size of total heap space

Xmx represents the maximum size of total heap space

-Xms1g
-Xmx1g

################################################################

Expert settings

################################################################

All settings below this section are considered

expert settings. Don't tamper with them unless

you understand what you are doing

################################################################

GC configuration

-XX:+UseConcMarkSweepGC
-XX:CMSInitiatingOccupancyFraction=75
-XX:+UseCMSInitiatingOccupancyOnly

Locale

Set the locale language

#-Duser.language=en

Set the locale country

#-Duser.country=US

Set the locale variant, if any

#-Duser.variant=

basic

set the I/O temp directory

#-Djava.io.tmpdir=$HOME

set to headless, just in case

-Djava.awt.headless=true

ensure UTF-8 encoding by default (e.g. filenames)

-Dfile.encoding=UTF-8

use our provided JNA always versus the system one

#-Djna.nosys=true

Turn on JRuby invokedynamic

-Djruby.compile.invokedynamic=true

4

You could try commenting out these three. The second and third have no effect if the first is not enabled.

5

Hi Badger

I comment on all these three variable
then I sop the logstash service and again stat but it gives same

systemctl status logstash.service
â logstash.service - logstash
Loaded: loaded (/etc/systemd/system/logstash.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Wed 2020-01-22 21:34:18 EST; 9h ago
Main PID: 25761 (code=exited, status=1/FAILURE)

Jan 22 21:34:18 xxxxxxx systemd[1]: logstash.service: Service hold-off time over, scheduling restart.
Jan 22 21:34:18 xxxxxxx systemd[1]: logstash.service: Scheduled restart job, restart counter is at 5.
Jan 22 21:34:18 xxxxxxx systemd[1]: Stopped logstash.
Jan 22 21:34:18 xxxxxxx systemd[1]: logstash.service: Start request repeated too quickly.
Jan 22 21:34:18 xxxxxxx systemd[1]: logstash.service: Failed with result 'exit-code'.
Jan 22 21:34:18 xxxxxxx systemd[1]: Failed to start logstash.

6

Process: 25761 ExecStart=/usr/share/logstash/bin/logstash --path.settings /etc/logstash (code=exited, status=1/FAILURE)

Is this any error?

7

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