Workaround for MATLAB R2017a Installer TLS Connection Failure Issue

matlab-connerr-workaround.sh

#!/bin/bash
# 
# Attempt to run MATLAB installer using system Java installation, rather than
# that bundled inside the installer, in an attempt to work around the
# activation/download connection error:
#
# https://www.mathworks.com/matlabcentral/answers/92634-why-do-i-get-a-connection-error-when-installing-or-activating-matlab-or-another-mathworks-product#answer_797409
#
# Tested on Ubuntu 20.04.2 LTS with openjdk-8-jre:
#	openjdk version "1.8.0_292"
#	OpenJDK Runtime Environment (build 1.8.0_292-8u292-b10-0ubuntu1~20.04-b10)
#	OpenJDK 64-Bit Server VM (build 25.292-b10, mixed mode)
#
# Note: OpenJDK >= 11 will not work due to java.xml.bind deprecation.
#		See: https://stackoverflow.com/a/43574427
#									
#
# Permission to use, copy, modify, and/or distribute this software for any
# purpose with or without fee is hereby granted.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
# REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
# AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
# INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
# LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
# OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
# PERFORMANCE OF THIS SOFTWARE.
#

# CHANGE ME - Remove these two lines
echo "Please review this script and update items as needed."
exit 1 

# CHANGE ME
# Directory containing install script and other installer files
INSTALLER_DIR="${HOME}/path_to/matlab"

# CHANGE ME
# The NNNN value in shown in the mathworks_NNNN portion of JRE_LOC
# when you run `install -v`
PID="6124"

# CHANGE ME
SYSTEM_JAVA="/usr/lib/jvm/java-8-openjdk-amd64/bin/java"

#-------------- The remainder should, in theory, work as-is. ---------------

# Location that MATLAB installer unpacks to.
TMP_DIR="/tmp/mathworks_${PID}"

if [ ! -d "${TMP_DIR}" ]; then
	echo "Error: Directory does not exist. Check the path from 'install -v'" >&2
	echo " ${TMP_DIR}"
	exit 1
fi

echo "Host information:"

if [ -f /etc/lsb-release ]; then
	cat /etc/lsb-release
	echo ""
fi

if [ ! -f "${SYSTEM_JAVA}" ]; then
	echo "Error: Not found: ${SYSTEM_JAVA}" >&2
	exit 1
fi

# Class path items
INSTALLER_CLASSPATH="${TMP_DIR}/java/config/professionalinstaller/pathlist.jar"

echo "INSTALLER_DIR: ${INSTALLER_DIR}"
echo "TMP_DIR: ${TMP_DIR}"
echo "INSTALLER_CLASSPATH:"
echo -e " ${INSTALLER_CLASSPATH}\n"

echo -e "Launching installer with system's Java installation"
echo ""
set -x

${SYSTEM_JAVA} \
	-Xmx512m \
	-cp "${INSTALLER_CLASSPATH}" \
	-splash:"${INSTALLER_DIR}/java/splash.png" \
	com/mathworks/professionalinstaller/Launcher \
	-root "${INSTALLER_DIR}" \
	-libdir "${TMP_DIR}"