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Junit Out Of Memory Error Eclipse

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Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like eclipse junit memory settings you, helping each other. Join them; it only takes a minute: Sign up Why does heap space run out only when running JUnit tests? up vote 21 down vote favorite 1 When running JUnit tests, I always seem

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to run into this error: eclipse outOfMemoryError: heap space I have monitored Eclipse with JConsole and heap memory peaks at about 150MB. I have set heap memory to 1GB. I am using the following arguments when starting Eclipse: -vm "C:\Program Files\Java\jre1.5.0_08\bin\javaw.exe" -vmargs -Xmx1024M -XX:MaxPermSize=128M -Dcom.sun.management.jmxremote.port=8999 -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false Does anyone know what may be causing this issue? It happens only when running JUnit tests. java eclipse junit out-of-memory share|improve this question edited Feb 23 '11 at 21:14 eclipse junit outofmemory Pops♦ 14.6k21100135 asked Mar 25 '09 at 11:15 smauel 70651223 May you please provide further details? Which version of Eclipse? Which version of JUnit? Any mock-objects framework? A code snippet which rises the exception? Any framework behind the curtain? –Manrico Corazzi Mar 25 '09 at 11:19 add a comment| 5 Answers 5 active oldest votes up vote 36 down vote accepted Junit tests are run in a different vm as the Eclipse IDE. So it is that vm that is out of memory and not the Eclipse one. You can change the settings of the test vm in the run configurations of the test. You go to the run configurations and then under arguments, you can set the vm arguments. share|improve this answer edited Mar 25 '09 at 12:30 answered Mar 25 '09 at 11:23 Thijs Wouters 706615 add a comment| up vote 13 down vote Further to @Thijs Wouters response, to fix this issue in eclipse I did the following: Added a new Run configuration under JUnit (Run>Run configuration>JUnit>New) Within the arguments tab set VM arguments to "-Xms64m -Xmx256m" or higher if needs be share|improve this answer edited Sep 23 '10 at 15:26 answered Sep 17 '10 at 10:29 Nigel_V_Thomas 499820 add a comment| up vote 9 down vote You probably have a memory leak in your JUnit tests. A common

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Java.lang.outofmemoryerror Permgen Space Eclipse

the site Help Center Detailed answers to any questions you might error occurred during initialization of vm could not reserve enough space for object heap have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company http://stackoverflow.com/questions/681133/why-does-heap-space-run-out-only-when-running-junit-tests Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, http://stackoverflow.com/questions/15069286/outofmemoryerror-when-running-junit-test-case just like you, helping each other. Join them; it only takes a minute: Sign up OutofMemoryError when running Junit Test case [closed] up vote -2 down vote favorite I am running Junit test case in Jenkins through build.xml. When I run a particular test case I get the below error. Error 500 Java heap space


Problem accessing /url. Reason:

 Java heap space

Caused by:

java.lang.OutOfMemoryError: Java heap space at java.util.Arrays.copyOf(Arrays.java:2882) at java.lang.AbstractStringBuilder.expandCapacity(AbstractStringBuilder.java:100) at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:390) at java.lang.StringBuilder.append(StringBuilder.java:119) at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48) at java.lang.Long.parseLong(Long.java:410) at java.lang.Long.valueOf(Long.java:525) at org.codehaus.jettison.mapped.DefaultConverter.convertToJSONPrimitive(DefaultConverter.java:39) at org.codehaus.jettison.mapped.MappedNamespaceConvention.convertToJSONPrimitive(MappedNamespaceConvention.java:282) at org.codehaus.jettison.mapped.MappedXMLStreamWriter$JSONPropertyObject.withProperty(MappedXMLStreamWriter.java:153) at org.codehaus.jettison.mapped.MappedXMLStreamWriter$JSONProperty.withProperty(MappedXMLStreamWriter.java:66) at org.codehaus.jettison.mapped.MappedXMLStreamWriter.writeEndElement(MappedXMLStreamWriter.java:247) at com.sun.xml.bind.v2.runtime.output.XMLStreamWriterOutput.endTag(XMLStreamWriterOutput.java:144) at com.sun.xml.bind.v2.runtime.output.XmlOutputAbstractImpl.endTag(XmlOutputAbstractImpl.java:120) at com.sun.xml.bind.v2.runtime.XMLSerializer.leafElement(XMLSerializer.java:326) at com.sun.xml.bind.v2.model.impl.RuntimeBuiltinLeafInfoImpl$StringImplImpl.writeLeafElement(RuntimeBuilti

Certification Databases Caching Books Engineering Languages Frameworks Products This Site Careers Other all forums Forum: Testing OutOfMemoryError while executing JUnit Test https://coderanch.com/t/488488/Testing/OutOfMemoryError-executing-JUnit-Test-cases cases with maven install Pratik Surti Greenhorn Posts: 21 posted 6 years ago Hi All, I am executing more than 1,000 Junit test cases using TestSuits together http://blog.justinmiranda.com/2008/07/junit-test-outofmemoryerror-running-in.html in one shot. In order to execute these test cases as Junit, it is working fine but when executing it as the maven install, it is throwing OutOfMemoryError junit out at almost after the count of 150. I tried to maximize jvm heap size but the problem persisted. After I found another solution updating the configuration details in POM.xml as below: org.apache.maven.plugins maven-surefire-plugin pertest -Xms512m -Xmx1024m false After doing this I am able to execute all the JUnit test cases without having and outofmemoryerror permgen space OutOfMemoryError but performance got degraded. I want to know: 1) How can I improve the performance ? 1) Is changes mentioned above in POM.xml are OK ? 2) Can we mentioned the memory allocation in POM.xml like the way mentioned above ? Best Regards, Pratik Pratik Surti SCJP 5.0 David Newton Author Rancher Posts: 12617 I like... posted 6 years ago I don't see anything wrong with what you did (although I've always just specified the args on the command line). Still, if you're running out of memory after 150 tests, I'd make sure your tests are releasing whatever they're using, because that seems kind of extreme. As a counter-example, I have a project that has thousands of tests, and it makes it through the bulk of them before throwing an OOME. Karl Heinz Marbaise Greenhorn Posts: 19 posted 6 years ago Hi, have you checked the Maven settings for the JVM itself ? Kind regards Karl Heinz Marbaise Software Configuration Management (Subversion, CVS, SVK etc.) http://www.skmwiki.d

memory to the JVM. This issue was a little trySo first of all, I figured JUnit would be running inside the Eclipse JVM, so I increased the memory settings in eclipse.ini to 1 Gig (from 512m).-vmargs-Xms1024m-Xmx1024m-XX:PermSize=256m-XX:MaxPermSize=256mI restarted Eclipse and reran the JUnit test. Same result.I then decided to try to execute the same code in our webapp (running in Tomcat 5.5 configured with 512m of heap) and it completed successfully. This made me realize that the JUnit tests must be running in a separate JVM (either spawned or forked). The critical piece is that the JUnit JVM was not using the Eclipse memory settings from eclipse.ini. Instead, it must be using the default JVM memory settings (i.e. 64m). I searched a bit for how one might allocate more memory to a JUnit test in Eclipse and didn't find anything conclusive, so I went in and played around with the JUnit settings myself.I started by opening up the Eclipse page that allows a user to manage JUnit configuration settings (right click a JUnit class file and select Run As > Open Run Dialog). From this dialog, click on the "Arguments" tab and paste the following settings into the "VM arguments" field:-Xms512m-Xmx512mApply the settings and Close the dialog. Rerun your test and reconfigure these settings if necessary. Posted by Justin Miranda at 1:18 PM Labels: junit, openmrs 6 comments: Burke said... Nice tip! Thanks for this blog. :-) July 15, 2008 at 11:53 PM B-rizzle said... Yeah, nice tip. I'm wondering if there is any way to make this the default configuration when running all unit tests so I don't have to customize this for every Unit Test that I run in Eclipse. January 14, 2009 at 6:49 PM psable said... Thanks! May 5, 2010 at 8:47 AM Unknown said... Thanks !!! that was really helpful December 7, 2011 at 1:55 AM Mike Coleman said... I ran into the same issue recently. Here's another option that does basically the same thing but a little quicker.In window preferences, go to Java -> Installed JREs. Choose your default and duplicate it. Click on the duplicate, give it a name of "JRE for Junit" and set the memory settings on the Default VM Arguments.Now, next time you run a JUnit, choose the new JRE. It saves a few key strokes instead of having to enter the JVM arguments every time, just choose the JRE from the choices presented in the debug configurations for JUnit March 19, 2012 at 9:07 AM Justin Miranda said... Thanks for your comment, Mike (sorry for the delay in publishing it). July 23, 2012 at 1:17 PM Post a

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