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From "Knut Anders Hatlen (JIRA)" <j...@apache.org>
Subject [jira] Created: (DERBY-4859) Missing doPrivileged in DatabaseClasses.WriteClassFile()
Date Wed, 20 Oct 2010 17:10:24 GMT
Missing doPrivileged in DatabaseClasses.WriteClassFile()
--------------------------------------------------------

                 Key: DERBY-4859
                 URL: https://issues.apache.org/jira/browse/DERBY-4859
             Project: Derby
          Issue Type: Bug
          Components: Services
    Affects Versions: 10.7.0.0
            Reporter: Knut Anders Hatlen
            Priority: Minor


One of my test runs failed with the following error:

1) testAllUncommittedReclaim(org.apache.derbyTesting.functionTests.tests.store.AccessTest)java.sql.SQLException:
Java exception: 'access denied (java.io.FilePermission /export/home/tmp/kh160127/derbyall/system/ac72985692x012bxc9d4x9594xffffa08cb27a0.class
write): java.security.AccessControlException'.
        at org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(Unknown Source)
(...)
Caused by: java.security.AccessControlException: access denied (java.io.FilePermission /export/home/tmp/kh160127/derbyall/system/ac72985692x012bxc9d4x9594xffffa08cb27a0.class
write)
        at java.security.AccessControlContext.checkPermission(AccessControlContext.java:323)
        at java.security.AccessController.checkPermission(AccessController.java:546)
        at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
        at java.lang.SecurityManager.checkWrite(SecurityManager.java:962)
        at java.io.FileOutputStream.<init>(FileOutputStream.java:169)
        at java.io.FileOutputStream.<init>(FileOutputStream.java:131)
        at org.apache.derby.impl.services.reflect.DatabaseClasses.WriteClassFile(Unknown Source)
        at org.apache.derby.impl.services.reflect.DatabaseClasses.loadGeneratedClass(Unknown
Source)
(...)

I think the underlying error is an OutOfMemoryError, because I have seen tests running out
of permgen space with the same configuration lately. But that error never gets all the way
out to the test framework because of the above file permission error.

When DatabaseClasses.loadGeneratedClass() fails with a LinkageError or a VirtualMachineError
(the super-class of OutOfMemoryError), it attempts to dump the generated class to disk. But
since the tests run under a security manager, and the code writes the class to disk isn't
wrapped in a privileged block, the dumping of extra debug info fails and hides the original
error.

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