[JIRA] (JENKINS-23784) Allow parallel class loading

[jgl...@cloudbees.com (JIRA)]

Title: Message Title

Jesse Glick commented on JENKINS-23784   Re: Allow parallel class loading If I set up caching in SandboxResolvingClassLoader, I no longer get contention on UberClassLoader. But the heap still grows to multiple Gbs, and almost every build eventually freezes in "Running CpsFlowExecution[Owner[class-loading-JENKINS-23784/1958:class-loading-JENKINS-23784 #1958]]" #640 daemon prio=5 os_prio=0 tid=0x00007f1874080000 nid=0x38e9 waiting for monitor entry [0x00007f1800fec000] java.lang.Thread.State: BLOCKED (on object monitor) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:348) at com.sun.beans.finder.ClassFinder.findClass(ClassFinder.java:67) at com.sun.beans.finder.ClassFinder.findClass(ClassFinder.java:110) at java.beans.Introspector.findCustomizerClass(Introspector.java:1301) at java.beans.Introspector.getTargetBeanDescriptor(Introspector.java:1295) at java.beans.Introspector.getBeanInfo(Introspector.java:425) at java.beans.Introspector.getBeanInfo(Introspector.java:173) at groovy.lang.MetaClassImpl$15.run(MetaClassImpl.java:2956) at java.security.AccessController.doPrivileged(Native Method) at groovy.lang.MetaClassImpl.addProperties(MetaClassImpl.java:2954) at groovy.lang.MetaClassImpl.initialize(MetaClassImpl.java:2937) - locked <0x000000077d266388> (a groovy.lang.MetaClassImpl) at org.codehaus.groovy.reflection.ClassInfo.getMetaClassUnderLock(ClassInfo.java:166) at … which seems to bypass the cache—whether because it is using the Thread.getContextClassLoader, which would be from Jetty, or because of some other unidentified native lock. An unblocked build looks like "Running CpsFlowExecution[Owner[class-loading-JENKINS-23784/1990:class-loading-JENKINS-23784 #1990]]" #776 daemon prio=5 os_prio=0 tid=0x00007f1868032000 nid=0x3975 runnable [0x00007f1891605000] java.lang.Thread.State: RUNNABLE at java.util.zip.ZipFile.getEntry(Native Method) at java.util.zip.ZipFile.getEntry(ZipFile.java:310) - locked <0x00000006c915ced0> (a java.util.jar.JarFile) at java.util.jar.JarFile.getEntry(JarFile.java:240) at java.util.jar.JarFile.getJarEntry(JarFile.java:223) at sun.misc.URLClassPath$JarLoader.getResource(URLClassPath.java:1005) at sun.misc.URLClassPath.getResource(URLClassPath.java:212) at java.net.URLClassLoader$1.run(URLClassLoader.java:365) at java.net.URLClassLoader$1.run(URLClassLoader.java:362) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:361) at org.eclipse.jetty.webapp.WebAppClassLoader.findClass(WebAppClassLoader.java:510) at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:441) - locked <0x00000006c8ca63c0> (a org.jenkinsci.maven.plugins.hpi.RunMojo$2) at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:403) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:348) at com.sun.beans.finder.ClassFinder.findClass(ClassFinder.java:67) at com.sun.beans.finder.ClassFinder.findClass(ClassFinder.java:110) at com.sun.beans.finder.InstanceFinder.instantiate(InstanceFinder.java:93) at com.sun.beans.finder.InstanceFinder.find(InstanceFinder.java:66) at … Add Comment   This message was sent by Atlassian JIRA (v7.1.7#71011-sha1:2526d7c) -- You received this message because you are subscribed to the Google Groups "Jenkins Issues" group. To unsubscribe from this group and stop receiving emails from it, send an email to jenkinsci-issues+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.