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HADOOP-7982. UserGroupInformation fails to login if thread's context classloader can't load HadoopLoginModule. Contributed by Todd Lipcon.

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git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1233751 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Todd Lipcon 2012-01-20 03:33:50 +00:00
parent 6861560098
commit b7eb5334f5
2 changed files with 15 additions and 2 deletions
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3
hadoop-common-project/hadoop-common/CHANGES.txt
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@ -279,6 +279,9 @@ Release 0.23.1 - Unreleased
HADOOP-7971. Adding back job/pipes/queue commands to bin/hadoop for
backward compatibility. (Prashath Sharma via acmurthy)
HADOOP-7982. UserGroupInformation fails to login if thread's context
classloader can't load HadoopLoginModule. (todd)
Release 0.23.0 - 2011-11-01
INCOMPATIBLE CHANGES

14
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/UserGroupInformation.java
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@ -416,9 +416,19 @@ public AppConfigurationEntry[] getAppConfigurationEntry(String appName) {
private static LoginContext
newLoginContext(String appName, Subject subject) throws LoginException {
return new LoginContext(appName, subject, null, new HadoopConfiguration());
// Temporarily switch the thread's ContextClassLoader to match this
// class's classloader, so that we can properly load HadoopLoginModule
// from the JAAS libraries.
Thread t = Thread.currentThread();
ClassLoader oldCCL = t.getContextClassLoader();
t.setContextClassLoader(HadoopLoginModule.class.getClassLoader());
try {
return new LoginContext(appName, subject, null, new HadoopConfiguration());
} finally {
t.setContextClassLoader(oldCCL);
}
}
private LoginContext getLogin() {
return user.getLogin();
}