export MAVEN_OPTS="-Xmx1024m -XX:MaxPermSize=512m" |
java.lang.OutOfMemoryError: PermGen space |
Increasing JUnit Test Memory in Maven
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<configuration>
<argLine>-Xms256m -Xmx512m -XX:MaxPermSize=512m</argLine>
</configuration>
</plugin>Our solution
This will expand your test memory capacity significantly, and if it’s still not enough, you can play with these numbers for your environment; however, to all you Maven users out there who’ve run into these problems, may the Force be with you, because sometimes it’s not obvious when a memory issue is the root of your problems. However, if you are using Arquillian in your test suite, chances are that you are going to run into a memory issue at some point, because the memory required to start up a container like Jetty or Tomcat in your test suite is significant. If you are using JBoss AS7 or GlassFish, then your server container will run in a different JVM and this will not typically be an issue.A very confusing example
Here is an interesting JVM core dump in the Rewrite and PrettyFaces test suites that was actually being caused by an out-of-memory error leading to native code execution failure, but nothing in the error trace would lead us to think it! (Unimportant bits omitted:)Core dump caused by Out-of-memory error
# # A fatal error has been detected by the Java Runtime Environment: # # SIGBUS (0x7) at pc=0x00007fac3c24e3bf, pid=32027, tid=140377731290880 # # JRE version: 7.0_03-b04 # Java VM: Java HotSpot(TM) 64-Bit Server VM (22.1-b02 mixed mode linux-amd64 compressed oops) # Problematic frame: # C [libc.so.6+0x1313bf] __nss_hosts_lookup+0x1117f # # Core dump written. Default location: ~/Projects/ocpsoft/prettyfaces/annotations/core or core.32027 # # If you would like to submit a bug report, please visit: # http://bugreport.sun.com/bugreport/crash.jsp # The crash happened outside the Java Virtual Machine in native code. # See problematic frame for where to report the bug. # --------------- T H R E A D --------------- Current thread (0x0000000000bef800): JavaThread "main" [_thread_in_native, id=32030, stack(0x00007fac3cbed000,0x00007fac3ccee000)] siginfo:si_signo=SIGBUS: si_errno=0, si_code=2 (BUS_ADRERR), si_addr=0x00007fac3534c000 Registers: ... Top of Stack: (sp=0x00007fac3cce7b68) ... Instructions: (pc=0x00007fac3c24e3bf) ... Register to memory mapping: ... Stack: [0x00007fac3cbed000,0x00007fac3ccee000], sp=0x00007fac3cce7b68, free space=1002k Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code) C [libc.so.6+0x1313bf] __nss_hosts_lookup+0x1117f C [libzip.so+0x5057] ZIP_GetNextEntry+0x57 j java.util.zip.ZipFile.getNextEntry(JI)J+0 j java.util.zip.ZipFile.access$500(JI)J+2 j java.util.zip.ZipFile$1.nextElement()Ljava/util/zip/ZipEntry;+54 j java.util.zip.ZipFile$1.nextElement()Ljava/lang/Object;+1 j java.util.jar.JarFile$1.nextElement()Ljava/util/jar/JarFile$JarFileEntry;+4 j java.util.jar.JarFile$1.nextElement()Ljava/lang/Object;+1 j sun.misc.URLClassPath$JarLoader.validIndex(Ljava/lang/String;)Z+42 Java frames: (J=compiled Java code, j=interpreted, Vv=VM code) j java.util.zip.ZipFile.getNextEntry(JI)J+0 j java.util.zip.ZipFile.access$500(JI)J+2 j java.util.zip.ZipFile$1.nextElement()Ljava/util/zip/ZipEntry;+54 j java.util.zip.ZipFile$1.nextElement()Ljava/lang/Object;+1 j java.util.jar.JarFile$1.nextElement()Ljava/util/jar/JarFile$JarFileEntry;+4 j java.util.jar.JarFile$1.nextElement()Ljava/lang/Object;+1 j sun.misc.URLClassPath$JarLoader.validIndex(Ljava/lang/String;)Z+42 J sun.misc.URLClassPath$JarLoader.getResource(Ljava/lang/String;ZLjava/util/Set;)Lsun/misc/Resource; J sun.misc.URLClassPath$JarLoader.getResource(Ljava/lang/String;Z)Lsun/misc/Resource; j sun.misc.URLClassPath$JarLoader.findResource(Ljava/lang/String;Z)Ljava/net/URL;+3 j sun.misc.URLClassPath.findResource(Ljava/lang/String;Z)Ljava/net/URL;+17 j java.net.URLClassLoader$2.run()Ljava/net/URL;+12 j java.net.URLClassLoader$2.run()Ljava/lang/Object;+1 v ~StubRoutines::call_stub j java.security.AccessController.doPrivileged(Ljava/security/PrivilegedAction;Ljava/security/AccessControlContext;)Ljava/lang/Object;+0 j java.net.URLClassLoader.findResource(Ljava/lang/String;)Ljava/net/URL;+13 j java.lang.ClassLoader.getResource(Ljava/lang/String;)Ljava/net/URL;+30 j java.net.URLClassLoader.getResourceAsStream(Ljava/lang/String;)Ljava/io/InputStream;+2
