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Error: Could not create the Java Virtual Machine. Spigot Minecraft

i'm trying to install spigot server on debian 10, when i run start.sh:
#!/bin/sh
while true
do
java -Xms4G -Xmx4G -XX:+UseG1GC -XX:+ParallelRefProcEnabled -XX:MaxGCPauseMillis=200 -
XX:+UnlockExperimentalVMOptions -$
echo "restarting in 10"
sleep 10
done
i've got this output:
i don't have any idea on how to fix it, any help?

The script seems to require an argument which should be the jar name.
Also, you put a wrong back to break line ("\n") which seems to break the bash.
For me, you should replace -$ by the jar file or spigot, like that:
#!/bin/sh
while true
do
java -Xms4G -Xmx4G -XX:+UseG1GC -XX:+ParallelRefProcEnabled -XX:MaxGCPauseMillis=200 -XX:+UnlockExperimentalVMOptions spigot-1.18.jar
echo "Restarting in 10 seconds"
sleep 10
done

The script is not correct.
#!/bin/sh
while true
do
java -Xms4G -Xmx4G -XX:+UseG1GC -XX:+ParallelRefProcEnabled -XX:MaxGCPauseMillis=200 -XX:+UnlockExperimentalVMOptions -XX:+DisableExplicitGC -XX:+AlwaysPreTouch -XX:G1NewSizePercent=30 - XX:G1MaxNewSizePercent=40 -XX:G1HeapRegionSize=8M -XX:G1ReservePercent=20 -XX:G1HeapWastePercent=5 -XX:G1MixedGCCountTarget=4 -XX:InitiatingHeapOccupancyPercent=15 -XX:G1MixedGCLiveThresholdPercent=90 -XX:G1RSetUpdatingPauseTimePercent=5 -XX:SurvivorRatio=32 -XX:+PerfDisableSharedMem -XX:MaxTenuringThreshold=1 -Dusing.aikars.flags=https://mcflags.emc.gs -Daikars.new.flags=true -jar spigot.jar nogui
echo "restarting in 10"
sleep 10
done
Reference: https://www.vultr.com/docs/setup-spigot-on-debian-10/

systemd for java process issue with heap dump

My application is written in java spring boot, to run the application on linux system i have written a systemd file as below.
[Unit]
Description=Service Module For microservice Service.
After=network.target auditd.service
[Install]
WantedBy=multi-user.target
[Service]
Type=idle
Environment=service_name=/home/ec2-user/test-1.0-SNAPSHOT.jar
Environment=env=dev
ExecStart=/usr/bin/java -jar ${service_name} \
--spring.profiles.active=${env} \
--Xmx=1300M \
-XX:+HeapDumpOnOutOfMemoryError \
-Xloggc:gc.log \
-XX:+PrintGCDetails \
-XX:+PrintGCTimeStamps \
-XX:+UseGCLogFileRotation \
-XX:NumberOfGCLogFiles=5 \
-XX:GCLogFileSize=10M
ExecStop=/bin/kill -s TERM $MAINPID
LimitNOFILE=30000
Restart=always
RestartSec=500
StartLimitBurst=3
StartLimitInterval=120
MemoryLimit=1300M
[Manager]
When this systemd file is started, i can see in process mentioned process is running as expected.
/usr/bin/java -jar /home/ec2-user/test-1.0-SNAPSHOT.jar --spring.profiles.active=dev --Xmx=1300M -XX:+HeapDumpOnOutOfMemoryError -Xloggc:gc.log -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=5 -XX:GCLogFileSize=10M
Issue is when the application fails with "java.lang.OutOfMemoryError: Java heap space" errors in the logs and does not export heap dump and gc logs in the location specified. Has someone used jar with systemd and faced similar issues.

Maybe if you set WorkingDirectory=/home/ec2-user/ to the directory where you want your logs/dumps to appear. Because without that I'm not sure where systemd is trying to create the gc.log you specified.
Or alternativly you could try to specifiy the whole path to the gc.log: -Xloggc:/home/ec2-user/gc.log

Well i have found out that the problem was with the new line and \ characters, If we place all the jvm arguments in the single line it works!!!.
ex:
ExecStart=/usr/bin/java -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/location/heapdump.bin -Xloggc:/location/gc.log -jar test.jar --Xms=512M --Xmx=1300M --spring.profiles.active=${env}
Note: Some of the arguments are deprecated in Java 11, so check document arguments to include as per use case.
https://docs.oracle.com/en/java/javase/11/tools/java.html#GUID-3B1CE181-CD30-4178-9602-230B800D4FAE

export huge data from elastic search

I am writing a java api (reporting Api )that is exports a huge data from elastic search, I was test the code but I found many spikes in the Gc activities I need recommendations to tune the jvm params and the Gc prams
-verbose:gc -Xloggc:/opt/jboss/standalone/log/gc.log -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=5 -XX:GCLogFileSize=3M -XX:-TraceClassUnloading -server -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:NewRatio=2 -Djava.net.preferIPv4Stack=true -Duser.timezone=GMT -XX:+CMSClassUnloadingEnabled -XX:+CMSParallelRemarkEnabled -XX:+UseCMSInitiatingOccupancyOnly -XX:CMSInitiatingOccupancyFraction=70 -XX:+CMSClassUnloadingEnabled -XX:+ExplicitGCInvokesConcurrentAndUnloadsClasses -XX:+ScavengeBeforeFullGC -XX:+CMSScavengeBeforeRemark -Djboss.modules.system.pkgs=org.jboss.byteman -Djava.awt.headless=true -Dfile.encoding=UTF-8 -Dfile.io.encoding=UTF-8 -DjavaEncoding=UTF-8 -Xms2300m -Xmx2300m -XX:MaxMetaspaceSize=512m -XX:MetaspaceSize=256m -Dspring.profiles.active=loadtest -Dhttps.proxyHost=proxy.payfort.com -Dhttps.proxyPort=80 -Dhttp.proxyHost=proxy.payfort. Dorg.jboss.boot.log.file=/opt/jboss/standalone/log/server.log -Dlogging.configuration=file:/opt/jboss/standalone/configuration/logging.properties -jar /opt/jboss/jboss-modules.jar -mp /opt/jboss/modules org.jboss.as.standalone -Djboss.home.dir=/opt/jboss -Djboss.server.base.dir=/opt/jboss/standalone -c standalone.xml

weird tomcat7 on start

My Tomcat 7 Works fine, but when i retrieve the run command, return:
# ps -ef | grep java
tomcat7 18794 1 2 09:30 ? 00:01:09 /usr/lib/jvm/default-java/bin/java
-Djava.util.logging.config.file=/var/lib/tomcat7/conf/logging.properties
-Djava.awt.headless=true -Xmx128m -XX:+UseConcMarkSweepGC -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Xms2048m -Xmx2048m -Djava.endorsed.dirs=/usr/share/tomcat7/endorsed -classpath /usr/share/tomcat7/bin/bootstrap.jar:/usr/share/tomcat7/bin/tomcat-juli.jar
-Dcatalina.base=/var/lib/tomcat7 -Dcatalina.home=/usr/share/tomcat7 -Djava.io.tmpdir=/tmp/tomcat7-tomcat7-tmp org.apache.catalina.startup.Bootstrap start root 20085 18341 0 10:13 pts/0 00:00:00 grep java
I can't remove the "-Xmx128m" parameter.
I change this files:
/usr/share/tomcat7/bin/setenv.sh
/usr/share/tomcat7/defaults.template
But the parameter persist.
The xmx & xms are assigned correctly to 2048m, but i want a correct start.

Did you search through this file ? :
/etc/default/tomcat7
Find the line with JAVA_OPTS="-Djava.awt.headless=true
and change the -Xmx128 parameter

Solved!.
Just edit /etc/default/tomca7 and change this line:
JAVA_OPTS="-Djava.awt.headless=true -Xmx128m -XX:+UseConcMarkSweepGC"
to this:
JAVA_OPTS="-Djava.awt.headless=true -Xmx2048m -XX:+UseConcMarkSweepGC"

Error Expanding Script Generated Classpath for Java in PowerShell Script

Synopsis:
I am trying to convert a shell script from UNIX to Powershell.
The script cannot "hardcode" the path, but must instead list a directory to dynamically build the path at runtime.
Also, the script must pass in 1 parameter to indicate the "type" of the run.
I am placing my "attempted" re-write of the script (after much googling/binging)
This script might be very close as the "echo" statements produced what seems to be correct.
$EXE_CLASS="com.sungard.sims.dacar.standalone.Dacar"
#$DACAR_TAG=%1
$JAVA_EXE="$ENV:JDK15\jre\bin\java"
#JAVA_EXE=\opt\java\bin\java
$JARS="dist\lib\Dacar-Engine.jar;dist\lib\Dacar-Common.jar;dist\lib\Dacar-Collector.jar;dist\lib\standalone-Dacar.jar;dist\lib\DACAR-CRG.jar;"
#dynamically append all .jar files from the jars directory.
ls jars\*.jar | % { $JARS +=";jars\"+ $_.name }
$JAVA_OPTS="-server -Xloggc:.\engine.gc.log -Xmx2048m -Xms2048m -XX:NewSize=512m -XX:MaxNewSize=512m -XX:SurvivorRatio=8 -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:MaxTenuringThreshold=8 -XX:CMSInitiatingOccupancyFraction=60 -XX:+PrintGCTimeStamps -XX:MaxPermSize=128m -XX:PermSize=128m -DinstName=${DACAR_TAG} -DprocType=ENGINE"
echo "exe: -> $JAVA_EXE"
echo "opts: -> $JAVA_OPTS"
echo "jars: -> $JARS"
echo "class: -> $EXE_CLASS"
& $JAVA_EXE $JAVA_OPTS "-classpath .\configuration;$JARS $EXE_CLASS 1> dacar.out 2> dacar.err"
please note that I have commented out the use of the DACAR_TAG which would normally be passed in as %1 in batch script containing "TEST|DEV|PROD|QA|STRESS|[CLIENT SPECIFIC VALUE]"
Here is the output:
PS C:\dacar> .\startDacar.ps1
exe: -> c:\Program Files\Java\jdk1.5.0_22\jre\bin\java
opts: -> -server -Xloggc:.\engine.gc.log -Xmx2048m -Xms2048m -XX:NewSize=512m -XX:MaxNewSize=512m -XX:SurvivorRatio=8 -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:MaxTe
nuringThreshold=8 -XX:CMSInitiatingOccupancyFraction=60 -XX:+PrintGCTimeStamps -XX:MaxPermSize=128m -XX:PermSize=128m -DinstName=TESTING -DprocType=ENGINE
jars: -> dist\lib\Dacar-Engine.jar;dist\lib\Dacar-Common.jar;dist\lib\Dacar-Collector.jar;dist\lib\standalone-Dacar.jar;dist\lib\DACAR-CRG.jar;;jars\activation.jar;jars
\commons-beanutils-1.6.jar;jars\commons-codec-1.3.jar;jars\commons-collections-3.2.jar;jars\commons-configuration-1.4.jar;jars\commons-dbcp-1.4.jar;jars\commons-digester
-1.6.jar;jars\commons-discovery-0.4.jar;jars\commons-id.jar;jars\commons-lang-2.2.jar;jars\commons-logging-1.0.3.jar;jars\commons-pool-1.5.4.jar;jars\concurrent.jar;jars
\graphics.jar;jars\ha-javamail-1.0-beta-1.jar;jars\hsqldb.jar;jars\ibatis-core-3.0.jar;jars\jcommon-1.0.6.jar;jars\jconn3.jar;jars\jdom.jar;jars\jetty-6.1.15.jar;jars\je
tty-util-6.1.15.jar;jars\jfreechart-1.0.3.jar;jars\jgroups-all.jar;jars\jmxri.jar;jars\jta.jar;jars\junit.jar;jars\log4j-1.2.9.jar;jars\mailapi.jar;jars\postgresql-8.0.3
09.jdbc2ee.jar;jars\postgresql-8.4-701.jdbc3.jar;jars\quartz-1.6.0.jar;jars\servlet-api-2.5-20081211.jar;jars\smtp.jar;jars\svnant.jar;jars\svnClientAdapter.jar;jars\svn
javahl.jar;jars\truezip-6.jar;jars\uic-optional.jar;jars\uic.jar
class: -> com.sungard.sims.dacar.standalone.Dacar
Unrecognized option: -server -Xloggc:.\engine.gc.log -Xmx2048m -Xms2048m -XX:NewSize=512m -XX:MaxNewSize=512m -XX:SurvivorRatio=8 -XX:+UseParNewGC -XX:+UseConcMarkSweepG
-XX:MaxTenuringThreshold=8 -XX:CMSInitiatingOccupancyFraction=60 -XX:+PrintGCTimeStamps -XX:MaxPermSize=128m -XX:PermSize=128m -DinstName=TESTING -DprocType=ENGINE
Could not create the Java virtual machine.
Adding the tag will be my next question if I can't figure this out.
JUST AS AN FYI, from with in a ps1 script I can start it the program with the following command successfully:
& "c:\Program Files\Java\jdk1.6.0_20\jre\bin\java" -server -Xloggc:.\engine.gc.log -Xmx2048m -Xms2048m -XX:NewSize=512m -XX:MaxNewSize=512m -XX:SurvivorRatio=8 -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:MaxTenuringThreshold=8 -XX:CMSInitiatingOccupancyFraction=60 -XX:+PrintGCTimeStamps -XX:MaxPermSize=128m -XX:PermSize=128m -DinstName=TESTING -DprocType=ENGINE -classpath ".\configuration;dist\lib\Dacar-Engine.jar;dist\lib\Dacar-Common.jar;dist\lib\Dacar-Collector.jar;dist\lib\standalone-Dacar.jar;dist\lib\DACAR-CRG.jar;;jars\activation.jar;jars\commons-beanutils-1.6.jar;jars\commons-codec-1.3.jar;jars\commons-collections-3.2.jar;jars\commons-configuration-1.4.jar;jars\commons-dbcp-1.4.jar;jars\commons-digester-1.6.jar;jars\commons-discovery-0.4.jar;jars\commons-id.jar;jars\commons-lang-2.2.jar;jars\commons-logging-1.0.3.jar;jars\commons-pool-1.5.4.jar;jars\concurrent.jar;jars\graphics.jar;jars\ha-javamail-1.0-beta-1.jar;jars\hsqldb.jar;jars\ibatis-core-3.0.jar;jars\jcommon-1.0.6.jar;jars\jconn3.jar;jars\jdom.jar;jars\jetty-6.1.15.jar;jars\jetty-util-6.1.15.jar;jars\jfreechart-1.0.3.jar;jars\jgroups-all.jar;jars\jmxri.jar;jars\jta.jar;jars\junit.jar;jars\log4j-1.2.9.jar;jars\mailapi.jar;jars\postgresql-8.0.309.jdbc2ee.jar;jars\postgresql-8.4-701.jdbc3.jar;jars\quartz-1.6.0.jar;jars\servlet-api-2.5-20081211.jar;jars\smtp.jar;jars\svnant.jar;jars\svnClientAdapter.jar;jars\svnjavahl.jar;jars\truezip-6.jar;jars\uic-optional.jar;jars\uic.jar" com.sungard.sims.dacar.standalone.Dacar
But that is not really an option, as That is just invoking the thing in a hard coded fashion.

One thing to note about PowerShell variable expansion is that if it's anything more than a simple $VARIABLE expression you typically need to escape it using curly braces or a sub-expression.
So this line:
$JAVA_EXE="$ENV:JDK15\jre\bin\java"
Could be represented as either:
$JAVA_EXE="${ENV:JDK15}\jre\bin\java"
or...
$JAVA_EXE="$($ENV:JDK15)\jre\bin\java"
EDIT: Apparently PowerShell does
correctly evaluate all 3 examples. I
seem to recall the first syntax not
working but perhaps that was in
PowerShell 1.0 or a CTP...
Another useful tip that I often suggest people do when working with external .exe commands is to map it to an alias using the Set-Alias command. This way it makes working with the command a lot more natural as you don't have to use the &"string" syntax.
Set-Alias java "$($ENV:JDK15)\jre\bin\java.exe"
java blah1 blah2 etc