"JVM failed to start. Make sure a firewall is not blocking inter-process communication." error message

Matthew Helmer — Thu, 30 Apr 2015 17:55:40 -0000

Hi, I'm taking a programming in school and my professor wants us to use DrJava. I'm having trouble running programs after compiling them. I got the error under the "Interactions" section that said:

"JVM failed to start. Make sure a firewall is not blocking
inter-process communication. See the console tab for details."

In the console tab, it says:

"java.io.IOException: Unable to run process; class path may need to be adjusted at edu.rice.cs.plt.concurrent.ProcessTaskController$1.run(ProcessTaskController.java:157)
at java.lang.Thread.run(Thread.java:744)"

I've read other tickets on here that have been answered with the suggestion of changing firewall settings. I've turned my firewall off completely and I'm still experiencing the issue. I'm running Java 7, update 45 and DrJava version drjava-20140826-r5761. I am using a Macbook Pro, 13-inch mid 2012 model with an i5 core. The system properties from DrJava say this:

"System Properties:
DrJava Version drjava-20140826-r5761
DrJava Build Time 20140826-0459

drjava.debug.port = 50057
java.runtime.name = Java(TM) SE Runtime Environment
sun.boot.library.path = /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/lib
java.vm.version = 24.45-b08
user.country.format = CA
gopherProxySet = false
java.vm.vendor = Oracle Corporation
java.vendor.url = http://java.oracle.com/
path.separator = :
java.vm.name = Java HotSpot(TM) 64-Bit Server VM
file.encoding.pkg = sun.io
user.country = US
sun.java.launcher = SUN_STANDARD
sun.os.patch.level = unknown
java.vm.specification.name = Java Virtual Machine Specification
user.dir = <anonymized user.home="">/Downloads
java.runtime.version = 1.7.0_45-b18
java.awt.graphicsenv = sun.awt.CGraphicsEnvironment
java.endorsed.dirs = /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/lib/endorsed
os.arch = x86_64
java.io.tmpdir = /var/folders/53/fn_1km1n75l1kkg9bm8564c00000gn/T/
line.separator = "\u000a"
java.vm.specification.vendor = Oracle Corporation
os.name = Mac OS X
apple.laf.useScreenMenuBar = true
sun.jnu.encoding = UTF-8
java.library.path = <anonymized user.home="">/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:.
sun.awt.enableExtraMouseButtons = true
java.specification.name = Java Platform API Specification
java.class.version = 51.0
sun.management.compiler = HotSpot 64-Bit Tiered Compilers
os.version = 10.10.3
http.nonProxyHosts = local|.local|169.254/16|.169.254/16
user.home = <anonymized user.home="">
user.timezone = America/Toronto
java.awt.printerjob = sun.lwawt.macosx.CPrinterJob
file.encoding = US-ASCII
java.specification.version = 1.7
java.class.path = <anonymized user.home="">/Downloads/drjava-stable-20140826-r5761.jar
user.name = <anonymized user.name="">
java.vm.specification.version = 1.7
sun.java.command = <anonymized user.home="">/Downloads/drjava-stable-20140826-r5761.jar
java.home = /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home
sun.arch.data.model = 64
user.language = en
java.specification.vendor = Oracle Corporation
awt.toolkit = sun.lwawt.macosx.LWCToolkit
java.vm.info = mixed mode
java.version = 1.7.0_45
java.ext.dirs = <anonymized user.home="">/Library/Java/Extensions:/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/lib/ext:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java
sun.boot.class.path = /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/lib/resources.jar:/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/lib/rt.jar:/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/lib/sunrsasign.jar:/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/lib/jsse.jar:/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/lib/jce.jar:/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/lib/charsets.jar:/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/lib/jfr.jar:/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/lib/JObjC.jar:/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/classes
java.vendor = Oracle Corporation
file.separator = /
java.vendor.url.bug = http://bugreport.sun.com/bugreport/
sun.font.fontmanager = sun.font.CFontManager
sun.io.unicode.encoding = UnicodeBig
sun.cpu.endian = little
java.rmi.server.hostname = 127.0.0.1
socksNonProxyHosts = local|.local|169.254/16|.169.254/16
ftp.nonProxyHosts = local|.local|169.254/16|.169.254/16
sun.cpu.isalist =

DrJava configuration file
In resource bundle edu.rice.cs.drjava.config.options:
nothing

In shadowed configuration:
right.margin.columns = 80
lineenum.enabled = true
key.delete.next = [shift DELETE]
key.delete.previous = [shift BACK_SPACE]
last.dir = <anonymized user.home="">/Documents/Acadia Files/Second Year/Summer/Computer Programming 2/Programs/Module 1/Lincoln/Lincoln.java
last.interactions.dir = <anonymized user.home="">/Documents/Acadia Files/Second Year/Summer/Computer Programming 2/Programs/Module 1/Lincoln
new.version.notification.last = 1430412338803

Used memory: about 45.58 megabytes
Free memory: about 68.92 megabytes
Total memory: about 114.50 megabytes
Total memory can expand to: about 910.50 megabytes

Number of processors/cores: 4

Compiler Discovery Log:

"
Thanks for the help!

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"JVM failed to start. Make sure a firewall is not blocking inter-process communication." error message