LibreOffice (soffice) issue while converting on Amazon ec2 - amazon-ec2

Question

This is not a repost, I am asking for the Amazon ec2 instance ! Questions that others asked worked fine on my local machine, and those were solved, but not on Amazon.
There have been several reports regarding this problem, but nothing solved this issue for me.
To post a few solutions:
https://forum.openoffice.org/en/forum/viewtopic.php?p=88088
https://forum.openoffice.org/en/forum/viewtopic.php?f=16&t=4767&p=21890&hilit=jodconverter#p21890
https://forum.openoffice.org/en/forum/viewtopic.php?f=16&t=4767&p=21948&hilit=jodconverter#p21948
These are the steps I took:
On a fresh EC2 Amazon instance, I have installed the libre office commons
$sudo apt-get install libreoffice-common
And then Maven
To run the service I am using (tried as sudo as well)
$soffice -nologo -nofirststartwizard -headless -norestore -invisible
"-accept=socket,host=localhost,port=8100,tcpNoDelay=1;urp;"
All ports and all securities are open for the ec2 instance
This is my code
import com.artofsolving.jodconverter.DocumentConverter;
import com.artofsolving.jodconverter.openoffice.connection.OpenOfficeConnection;
import com.artofsolving.jodconverter.openoffice.connection.SocketOpenOfficeConnection;
import com.artofsolving.jodconverter.openoffice.converter.OpenOfficeDocumentConverter;
import java.io.File;
/**
* soffice -headless -accept="socket,host=127.0.0.1,port=8100;urp;" -nofirststartwizard
*/
public class testrun {
public static void main(String[] args){
try {
File inputFile = new File("./test.html");
File outputFile = new File("./OK.pdf");
// connect to an OpenOffice.org instance running on port 8100
SocketOpenOfficeConnection connection = new SocketOpenOfficeConnection("127.0.0.1", 8100);
connection.connect();
// convert
DocumentConverter converter = new OpenOfficeDocumentConverter(connection);
converter.convert(inputFile, outputFile);
// close the connection
connection.disconnect();
}catch (Exception e){e.printStackTrace();}
}
}
This is my pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>izbr</groupId>
<artifactId>izbr</artifactId>
<version>1.0-SNAPSHOT</version>
<dependencies>
<!-- https://mvnrepository.com/artifact/com.artofsolving/jodconverter -->
<dependency>
<groupId>com.artofsolving</groupId>
<artifactId>jodconverter</artifactId>
<version>2.2.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-simple -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-simple</artifactId>
<version>1.4.3</version>
</dependency>
</dependencies>
My Java version is
openjdk version "1.8.0_91"
OpenJDK Runtime Environment (build 1.8.0_91-8u91-b14-0ubuntu4~14.04-b14)
OpenJDK 64-Bit Server VM (build 25.91-b14, mixed mode)
When I run
$mvn exec:java -Dexec.mainClass="testrun"
error is:
116 [testrun.main()] INFO com.artofsolving.jodconverter.openoffice.connection.SocketOpenOfficeConnection - connected
com.artofsolving.jodconverter.openoffice.connection.OpenOfficeException: conversion failed: could not save output document
at com.artofsolving.jodconverter.openoffice.converter.OpenOfficeDocumentConverter.loadAndExport(OpenOfficeDocumentConverter.java:144)
at com.artofsolving.jodconverter.openoffice.converter.OpenOfficeDocumentConverter.convertInternal(OpenOfficeDocumentConverter.java:120)
at com.artofsolving.jodconverter.openoffice.converter.AbstractOpenOfficeDocumentConverter.convert(AbstractOpenOfficeDocumentConverter.java:104)
at com.artofsolving.jodconverter.openoffice.converter.AbstractOpenOfficeDocumentConverter.convert(AbstractOpenOfficeDocumentConverter.java:74)
at com.artofsolving.jodconverter.openoffice.converter.AbstractOpenOfficeDocumentConverter.convert(AbstractOpenOfficeDocumentConverter.java:70)
at testrun.main(testrun.java:24)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:294)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.reflect.UndeclaredThrowableException
at com.sun.proxy.$Proxy26.storeToURL(Unknown Source)
at com.artofsolving.jodconverter.openoffice.converter.OpenOfficeDocumentConverter.storeDocument(OpenOfficeDocumentConverter.java:156)
at com.artofsolving.jodconverter.openoffice.converter.OpenOfficeDocumentConverter.loadAndExport(OpenOfficeDocumentConverter.java:140)
... 11 more
Caused by: com.sun.star.ucb.InteractiveAugmentedIOException: an error occurred during file opening
at com.sun.star.lib.uno.environments.remote.Job.remoteUnoRequestRaisedException(Job.java:187)
at com.sun.star.lib.uno.environments.remote.Job.execute(Job.java:153)
at com.sun.star.lib.uno.environments.remote.JobQueue.enter(JobQueue.java:349)
at com.sun.star.lib.uno.environments.remote.JobQueue.enter(JobQueue.java:318)
at com.sun.star.lib.uno.environments.remote.JavaThreadPool.enter(JavaThreadPool.java:106)
at com.sun.star.lib.uno.bridges.java_remote.java_remote_bridge.sendRequest(java_remote_bridge.java:657)
at com.sun.star.lib.uno.bridges.java_remote.ProxyFactory$Handler.request(ProxyFactory.java:159)
at com.sun.star.lib.uno.bridges.java_remote.ProxyFactory$Handler.invoke(ProxyFactory.java:141)
... 14 more
I have tried all suggestions such listing the listening ports and then changing the port number for soffice. Also running as sudo, and so on.
No solution helped. I have done a chmod 777 on /usr/bin/soffice /usr/bin/X11/soffice but that did not work.
Please note that it is working on my mahcine, but not on Amazon ec2 even if all ports and services are open!

Answer 1

EDIT: This worked for me, adjust the steps to your code. Changing the permission to folders and other answers I found were simply not helpful at all. I figured this out myself.
Upgrade/Update the instance
$ sudo apt-get upgrade
$ sudo apt-get update
Install java jdk 8
$ sudo add-apt-repository ppa:webupd8team/java
$ sudo apt-get update
$ sudo apt-get install oracle-java8-installer
$ sudo apt-get install oracle-java8-set-default
Install Maven
$ sudo add-apt-repository "deb http://ppa.launchpad.net/natecarlson/maven3/ubuntu precise main"
$ sudo apt-get update
$ sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 6DTHIS_IS_HEX_FROM_ERRORFA0101
$ sudo apt-get install maven3
$ sudo ln -s /usr/share/maven3/bin/mvn /usr/bin/mvn
$ sudo apt-get update
Install LibreOffice (full!), and then check if there is a common, ususally there is
$ sudo apt-get install libreoffice
$ sudo apt-get install libreoffice-common
Open a new tab just for testing the connection, ssh to EC2 and do
$ soffice -nologo -nofirststartwizard -headless -norestore -invisible "-accept=socket,host=localhost,port=8100,tcpNoDelay=1;urp;"
Go to a project/testing and adjust the pom.xml
$ nano pom.xml
<dependency>
<groupId>com.artofsolving</groupId>
<artifactId>jodconverter</artifactId>
<version>2.2.1</version>
</dependency>
Adjust the source code so that the line A is changed with the line B, making sure that in-file and out-file (if any) are the right paths, and that they exist
A: OpenOfficeConnection connection = new SocketOpenOfficeConnection(8100);
B: SocketOpenOfficeConnection connection = new SocketOpenOfficeConnection("127.0.0.1", 8100);
clean install the project with maven
$ mvn clean install
Run the project/test for example:
$ mvn exec:java -Dexec.mainClass="testrun"