Let's try to revive this

script/init.sh

@@ -2,7 +2,7 @@
 
 # This is the core script that Heroku uses when booting up a dyno
 
-PATH="$HOME/autossh/bin/:$HOME/dtach/bin/:$HOME/java/bin/:$PATH"
+PATH="$HOME/dtach/bin/:$HOME/java/bin/:$PATH"
 
 # Set up SSH for proxy server and schematics repository
 # Load keys from environmental variables
@@ -17,9 +17,9 @@ ssh-keyscan github.com >> .ssh/known_hosts
 # checker in the background
 
 while true; do
-	dtach -n server script/server.sh > /dev/null 2>&1
-	dtach -n proxy script/proxy.sh > /dev/null 2>&1
-	dtach -n schematics script/schematics.sh > /dev/null 2>&1
+	dtach -n server ~/script/server.sh > /dev/null 2>&1
+	dtach -n proxy ~/script/proxy.sh > /dev/null 2>&1
+	# dtach -n schematics ~/script/schematics.sh > /dev/null 2>&1
 	sleep 5
 done &
 

script/server.sh

@@ -1,22 +1,47 @@
 #!/bin/sh
 
-# The alive checker and Minecraft server is started at the same time. For performance reasons, the
-# OpenJ9 JVM is used instead of Java's default Hotspot JVM.
+# The alive checker and Minecraft server is started at the same time
 
-chmod -R 500 $HOME/plugins/bStats/ $HOME/plugins/PluginMetrics/ $HOME/plugins/ProtocolLib/
-
-dtach -n alivecheck $HOME/script/alivecheck.sh
-
-# Make certain files read-only
-
-chmod 400 bukkit.yml
-chmod 400 commands.yml
-chmod 400 eula.txt
-chmod 400 permissions.yml
-chmod 400 server-icon.png
-chmod 400 wepif.yml
+# Dump classes
+java -Xshare:dump
 
 while true; do
-	java -Xmx384M -Xtune:virtualized -Xaggressive -Xcompressedrefs -Xdump:heap+java+snap:none -Xdump:tool:events=throw+systhrow,filter=java/lang/OutOfMemoryError,exec="kill -9 %pid" -Xgc:concurrentScavenge -Xgc:dnssExpectedTimeRatioMaximum=3 -Xgc:scvNoAdaptiveTenure -Xdisableexplicitgc -Xshareclasses -Xshareclasses:noPersistentDiskSpaceCheck -XX:MaxDirectMemorySize=64M -XX:+ClassRelationshipVerifier -XX:+UseContainerSupport -DPaper.IgnoreJavaVersion=true -Dpaper.playerconnection.keepalive=360 -DIReallyKnowWhatIAmDoingISwear -jar server.jar
+	# Make certain files and folders read-only
+
+	chmod -R 500 plugins/bStats/
+	chmod -R 500 plugins/PluginMetrics/
+	chmod -R 500 plugins/ProtocolLib/
+	chmod 400 bukkit.yml
+	chmod 400 commands.yml
+	chmod 400 eula.txt
+	chmod 400 paper.yml
+	chmod 400 permissions.yml
+	chmod 400 server-icon.png
+	chmod 400 server.properties
+	chmod 400 spigot.yml
+	chmod 400 wepif.yml
+
+	# Start alive checker
+
+	dtach -n alivecheck ~/script/alivecheck.sh
+
+	# Start Minecraft server
+
+	java \
+		-Xmx384M \
+		-Xshare:on \
+		-Xss8M \
+		-XX:MaxDirectMemorySize=64M \
+		-XX:+UseContainerSupport \
+		-DPaper.IgnoreJavaVersion=true \
+		-Dpaper.playerconnection.keepalive=360 \
+		-DIReallyKnowWhatIAmDoingISwear \
+		-jar server.jar nogui
+
+	# Stop alive checker (will be started again on the next run)
+
+	pkill -9 alivecheck.sh
+
+	# Ensure we don't abuse the CPU in case of failure
 	sleep 1
 done

vendor/generate_jre.sh

@@ -1,15 +1,14 @@
 #!/bin/sh
 
-# This script is used as a reference to generate a stripped-down OpenJ9 JRE for the server
+# This script is used as a reference to generate a stripped-down JRE for the server
 
 rm -rf java/
-wget https://github.com/AdoptOpenJDK/openjdk14-binaries/releases/download/jdk-14%2B36.1_openj9-0.19.0/OpenJDK14U-jdk_x64_linux_openj9_14_36_openj9-0.19.0.tar.gz
+wget https://github.com/AdoptOpenJDK/openjdk14-binaries/releases/download/jdk-14.0.2%2B12/OpenJDK14U-jdk_x64_linux_hotspot_14.0.2_12.tar.gz
 tar -zxvf OpenJDK*
 rm OpenJDK*
 mv jdk* jdk/
 jdk/bin/jlink --no-header-files --no-man-pages --compress=2 --strip-debug \
 	--exclude-files=**java_*.properties,**jrunscript,**keytool,**legal/** \
-	--add-modules \
-		java.desktop,java.logging,java.management,java.naming,java.net.http,java.scripting,java.sql,jdk.crypto.ec,jdk.unsupported,jdk.zipfs,openj9.sharedclasses \
+	--add-modules java.desktop,java.logging,java.management,java.naming,java.net.http,java.scripting,java.sql,jdk.crypto.ec,jdk.unsupported,jdk.zipfs \
 	--output java
 rm -rf jdk/

vendor/java/lib/options.default

@@ -1 +0,0 @@
-"-Xlockword:mode=default,noLockword=java/lang/String,noLockword=java/util/MapEntry,noLockword=java/util/HashMap$Entry,noLockword=org/apache/harmony/luni/util/ModifiedMap$Entry,noLockword=java/util/Hashtable$Entry,noLockword=java/lang/invoke/MethodType,noLockword=java/lang/invoke/MethodHandle,noLockword=java/lang/invoke/CollectHandle,noLockword=java/lang/invoke/ConstructorHandle,noLockword=java/lang/invoke/ConvertHandle,noLockword=java/lang/invoke/ArgumentConversionHandle,noLockword=java/lang/invoke/AsTypeHandle,noLockword=java/lang/invoke/ExplicitCastHandle,noLockword=java/lang/invoke/FilterReturnHandle,noLockword=java/lang/invoke/DirectHandle,noLockword=java/lang/invoke/ReceiverBoundHandle,noLockword=java/lang/invoke/DynamicInvokerHandle,noLockword=java/lang/invoke/FieldHandle,noLockword=java/lang/invoke/FieldGetterHandle,noLockword=java/lang/invoke/FieldSetterHandle,noLockword=java/lang/invoke/StaticFieldGetterHandle,noLockword=java/lang/invoke/StaticFieldSetterHandle,noLockword=java/lang/invoke/IndirectHandle,noLockword=java/lang/invoke/InterfaceHandle,noLockword=java/lang/invoke/VirtualHandle,noLockword=java/lang/invoke/PrimitiveHandle,noLockword=java/lang/invoke/InvokeExactHandle,noLockword=java/lang/invoke/InvokeGenericHandle,noLockword=java/lang/invoke/VarargsCollectorHandle,noLockword=java/lang/invoke/ThunkTuple"

vendor/java/lib/security/default.policy

@@ -103,19 +103,6 @@ grant codeBase "jrt:/jdk.accessibility" {
     permission java.lang.RuntimePermission "accessClassInPackage.sun.awt";
 };
 
-grant codeBase "jrt:/jdk.attach" {
-    permission java.lang.RuntimePermission "accessClassInPackage.com.ibm.oti.util";
-    permission java.lang.RuntimePermission "accessClassInPackage.openj9.internal.tools.attach.target";
-    permission java.lang.RuntimePermission "accessClassInPackage.openj9.internal.tools.attach.diagnostics.base";
-    permission java.util.PropertyPermission "com.ibm.tools.attach.*", "read";
-    // required by com.ibm.tools.attach.attacher.OpenJ9AttachProvider.listVirtualMachinesImp():commonDir.exists(),
-    // openj9.internal.tools.attach.target.Reply.writeReply():new RandomAccessFile(replyFile, "rw"),
-    // and openj9.internal.tools.attach.target.Reply.deleteReply():replyFile.delete()
-    permission java.io.FilePermission "<<ALL FILES>>", "read,write,delete";
-    // required by com.ibm.tools.attach.attacher.OpenJ9VirtualMachine.tryAttachTarget():targetServer.accept()
-    permission java.net.SocketPermission "localhost:1024-", "accept,resolve";
-};
-
 grant codeBase "jrt:/jdk.charsets" {
     permission java.util.PropertyPermission "os.name", "read";
     permission java.lang.RuntimePermission "charsetProvider";
@@ -219,20 +206,6 @@ grant codeBase "jrt:/jdk.zipfs" {
     permission java.util.PropertyPermission "user.name", "read";
 };
 
-grant codeBase "jrt:/openj9.cuda" {
-    permission java.util.PropertyPermission "com.ibm.oti.vm.library.version", "read";
-    permission java.lang.RuntimePermission "loadLibrary.cuda4j29";
-};
-
-grant codeBase "jrt:/openj9.gpu" {
-    permission java.lang.RuntimePermission "accessClassInPackage.com.ibm.gpu.spi";
-    permission com.ibm.gpu.GPUPermission "access";
-    permission java.util.PropertyPermission "com.ibm.gpu.verbose", "read";
-    permission java.util.PropertyPermission "com.ibm.gpu.enforce", "read";
-    permission java.util.PropertyPermission "com.ibm.gpu.enable", "read";
-    permission java.util.PropertyPermission "com.ibm.gpu.disable", "read";
-};
-
 // permissions needed by applications using java.desktop module
 grant {
     permission java.lang.RuntimePermission "accessClassInPackage.com.sun.beans";

vendor/java/release

@@ -1,2 +1,2 @@
-JAVA_VERSION="14"
-MODULES="java.base java.datatransfer java.xml java.prefs java.desktop java.logging java.management java.security.sasl java.naming java.net.http java.scripting java.transaction.xa java.sql jdk.crypto.ec jdk.unsupported jdk.zipfs openj9.sharedclasses"
+JAVA_VERSION="14.0.2"
+MODULES="java.base java.datatransfer java.xml java.prefs java.desktop java.logging java.management java.security.sasl java.naming java.net.http java.scripting java.transaction.xa java.sql jdk.crypto.ec jdk.unsupported jdk.zipfs"