[jboss-jira] [JBoss JIRA] Commented: (JBCL-142) Investigate issue with useLoadClassForParent=false and security manager logging

[Adrian Brock (JIRA)]

    [ https://jira.jboss.org/jira/browse/JBCL-142?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12509584#action_12509584 ] 

Adrian Brock commented on JBCL-142:
-----------------------------------

The issue only occurs when there is a security manager and there is some access control logging
and only because a class in stdio needs to load java.lang.Math which is not already loaded.

It doesn't occur with useLoadClassForParent=true because loadClass() doesn't do any
access control logging.

Read the comments in the stacktrace from the bottom upwards to see what is happening.

java.lang.ClassCircularityError: java/lang/Math

<!-- Tries to load java/lang/Math again, resulting in CCE -->

	at org.jboss.stdio.WriterOutputStream.write(WriterOutputStream.java:102)
	at java.io.PrintStream.write(PrintStream.java:430)
	at sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:202)
	at sun.nio.cs.StreamEncoder.implWrite(StreamEncoder.java:263)
	at sun.nio.cs.StreamEncoder.write(StreamEncoder.java:106)
	at java.io.OutputStreamWriter.write(OutputStreamWriter.java:190)
	at java.io.BufferedWriter.flushBuffer(BufferedWriter.java:111)
	at java.io.PrintStream.write(PrintStream.java:476)
	at java.io.PrintStream.print(PrintStream.java:619)
	at java.io.PrintStream.println(PrintStream.java:756)
	at org.jboss.stdio.StdioContext$DelegatingPrintStream.println(StdioContext.java:297)

<!-- Checking for the resource leads to do more logging -->

	at sun.security.util.Debug.println(Debug.java:134)
	at java.security.AccessControlContext.checkPermission(AccessControlContext.java:329)
	at java.security.AccessController.checkPermission(AccessController.java:546)
	at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
	at sun.misc.URLClassPath.check(URLClassPath.java:410)
	at sun.misc.URLClassPath$JarLoader.checkResource(URLClassPath.java:676)
	at sun.misc.URLClassPath$JarLoader.getResource(URLClassPath.java:759)
	at sun.misc.URLClassPath.getResource(URLClassPath.java:169)
	at sun.misc.URLClassPath.getResource(URLClassPath.java:221)
	at java.lang.ClassLoader.getBootstrapResource(ClassLoader.java:1151)
	at java.lang.ClassLoader.getResource(ClassLoader.java:1000)
	at java.lang.ClassLoader.getResource(ClassLoader.java:998)
	at java.lang.ClassLoader.getResource(ClassLoader.java:998)

<!-- jboss-cl checks for java/lang/Math.class before locking the classloader -->

	at org.jboss.classloader.plugins.loader.ClassLoaderToLoaderAdapter$2.run(ClassLoaderToLoaderAdapter.java:112)
	at org.jboss.classloader.plugins.loader.ClassLoaderToLoaderAdapter$2.run(ClassLoaderToLoaderAdapter.java:1)
	at java.security.AccessController.doPrivileged(Native Method)
	at org.jboss.classloader.plugins.loader.ClassLoaderToLoaderAdapter.getResource(ClassLoaderToLoaderAdapter.java:107)
	at org.jboss.classloader.spi.ClassLoaderDomain.findLoaderFromParent(ClassLoaderDomain.java:678)
	at org.jboss.classloader.spi.ClassLoaderDomain.findBeforeLoader(ClassLoaderDomain.java:624)
	at org.jboss.classloader.spi.base.BaseClassLoaderDomain.findLoader(BaseClassLoaderDomain.java:344)
	at org.jboss.classloader.spi.base.BaseClassLoaderDomain.loadClass(BaseClassLoaderDomain.java:264)
	at org.jboss.classloader.spi.base.BaseClassLoaderDomain.loadClass(BaseClassLoaderDomain.java:1129)
	at org.jboss.classloader.spi.base.BaseClassLoader.loadClassFromDomain(BaseClassLoader.java:882)
	at org.jboss.classloader.spi.base.BaseClassLoader.doLoadClass(BaseClassLoader.java:523)
	at org.jboss.classloader.spi.base.BaseClassLoader.loadClass(BaseClassLoader.java:468)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:248)

<!-- stdio needs to load java.lang.Math -->

	at org.jboss.stdio.WriterOutputStream.write(WriterOutputStream.java:102)
	at java.io.PrintStream.write(PrintStream.java:430)
	at sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:202)
	at sun.nio.cs.StreamEncoder.implFlushBuffer(StreamEncoder.java:272)
	at sun.nio.cs.StreamEncoder.flushBuffer(StreamEncoder.java:85)
	at java.io.OutputStreamWriter.flushBuffer(OutputStreamWriter.java:168)
	at java.io.PrintStream.write(PrintStream.java:477)
	at java.io.PrintStream.print(PrintStream.java:619)
	at java.io.PrintStream.println(PrintStream.java:756)
	at org.jboss.stdio.StdioContext$DelegatingPrintStream.println(StdioContext.java:297)

<!-- First access control logging after stdio is installed -->

	at sun.security.util.Debug.println(Debug.java:134)
	at java.security.AccessControlContext.checkPermission(AccessControlContext.java:329)
	at java.security.AccessController.checkPermission(AccessController.java:546)
	at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
	at java.lang.Thread.setContextClassLoader(Thread.java:1351)


> Investigate issue with useLoadClassForParent=false and security manager logging
> -------------------------------------------------------------------------------
>
>                 Key: JBCL-142
>                 URL: https://jira.jboss.org/jira/browse/JBCL-142
>             Project: JBoss ClassLoader
>          Issue Type: Bug
>          Components: ClassLoader
>            Reporter: Adrian Brock
>            Assignee: Adrian Brock
>             Fix For: JBossCL.2.2.0.Alpha
>
>
> With the change to useLoadForParent=false by default a problem has shown up
> in jacc-security-manager tests in JBossAS.
> Need to investigate why it is failing in that mode and fix it.

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