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HADOOP-17675. LdapGroupsMapping$LdapSslSocketFactory ClassNotFoundException (#2965)

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(cherry picked from commit 0d78d73973)
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Istvan Fajth 2021-05-04 12:33:59 +02:00 committed by S O'Donnell
parent 00c3f3c42f
commit 00ba886a22
1 changed files with 23 additions and 1 deletions
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22
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/LdapGroupsMapping.java
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@ -677,7 +677,29 @@ private DirContext getDirContext() throws NamingException {
env.put("com.sun.jndi.ldap.read.timeout", conf.get(READ_TIMEOUT,
String.valueOf(READ_TIMEOUT_DEFAULT)));
// See HADOOP-17675 for details TLDR:
// From a native thread the thread's context classloader is null.
// jndi internally in the InitialDirContext specifies the context
// classloader for Class.forName, and as it is null, jndi will use the
// bootstrap classloader in this case to laod the socket factory
// implementation.
// BUT
// Bootstrap classloader does not have it in its classpath, so throws a
// ClassNotFoundException.
// This affects Impala for example when it uses LdapGroupsMapping.
ClassLoader currentContextLoader =
Thread.currentThread().getContextClassLoader();
if (currentContextLoader == null) {
try {
Thread.currentThread().setContextClassLoader(
this.getClass().getClassLoader());
ctx = new InitialDirContext(env);
} finally {
Thread.currentThread().setContextClassLoader(null);
}
} else {
ctx = new InitialDirContext(env);
}
}
return ctx;
}