fix Logstash error "logstash load error: ffi/ffi -- java.lang.NullPointerException: null" on Raspbian

fix.sh

#!/bin/bash

# based on https://github.com/mew2057/CAST/blob/6c7f7d514b7af3c512635ec145aa829c535467dc/csm_big_data/config-scripts/logstashFixupScript.sh
# see: https://github.com/elastic/logstash/issues/10755

apt-get update
apt-get install -f zip unzip

STARTDIR=$(pwd)
JARDIR="/usr/share/logstash/logstash-core/lib/jars"
JAR="jruby-complete-9.2.9.0.jar"
JRUBYDIR="${JAR}-dir"
PLATDIR="META-INF/jruby.home/lib/ruby/stdlib/ffi/platform/arm-linux"

cd ${JARDIR}
unzip -d ${JRUBYDIR} ${JAR}
cd "${JRUBYDIR}/${PLATDIR}"
cp -n types.conf platform.conf
cd "${JARDIR}/${JRUBYDIR}"

zip -r ${JAR} *
mv  -f ${JAR} ..
cd ${JARDIR}
rm -rf ${JRUBYDIR}

chown logstash:logstash ${JAR}

sync
sync
cd ${STARTDIR}

Getting an error:
unzip: cannot find or open jruby-complete-9.2.7.0.jar, jruby-complete-9.2.7.0.jar.zip or jruby-complete-9.2.7.0.jar.ZIP.

current jruby in JARDIR is jruby-complete-9.2.9.0.jar

May also want to add a way to use the version var in lines 21, 22, and 26 so you only have to change this in one place.

Many thanks for this! Helped me build my own Logstash image for my PI4

Thank you very much.

I ran the fix but still have the load error. Fix runs successfully and adds a platform.conf
What am I missing? Please assist.
PI4 with Ubuntu.

@osuide check the version or checkout this fix.sh that can help you with with newer versions (9.2.9.0+) for jruby / logstash:
https://gist.github.com/gwsales/5a27e6282063f902014d851247c5f448. There has been recent logstash releases that could be using a different version of jruby.

@gwsales I did manually update my script to ~11.1
It ran successfully and I have confirmed by unzipping the jar file that platfom.conf was actually added to the .jar.

Current release for jruby included in logstash: jruby-complete-9.2.11.1.jar

This script should be updated to auto discover jruby version with a find. I'll get around to it when I have time.

This should work:

JAR=$(basename $(find /usr/share/logstash/logstash-core/lib/jars/ -name "jruby-complete*.jar"))

Thanks, working also for jruby-complete-9.2.11.1.jar