HADOOP-15402. Prevent double logout of UGI's LoginContext
Signed-off-by: Akira Ajisaka <aajisaka@apache.org>
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@ -47,6 +47,7 @@
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import java.util.Map;
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import java.util.Set;
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import java.util.concurrent.TimeUnit;
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import java.util.concurrent.atomic.AtomicBoolean;
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import java.util.concurrent.atomic.AtomicReference;
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import javax.security.auth.DestroyFailedException;
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@ -1843,6 +1844,7 @@ static LoginParams getDefaults() {
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private static class HadoopLoginContext extends LoginContext {
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private final String appName;
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private final HadoopConfiguration conf;
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private AtomicBoolean isLoggedIn = new AtomicBoolean();
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HadoopLoginContext(String appName, Subject subject,
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HadoopConfiguration conf) throws LoginException {
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@ -1875,6 +1877,7 @@ public void login() throws LoginException {
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long start = Time.monotonicNow();
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try {
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super.login();
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isLoggedIn.set(true);
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metric = metrics.loginSuccess;
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} finally {
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metric.add(Time.monotonicNow() - start);
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@ -1885,8 +1888,7 @@ public void login() throws LoginException {
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@Override
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public void logout() throws LoginException {
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synchronized(getSubjectLock()) {
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if (this.getSubject() != null
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&& !this.getSubject().getPrivateCredentials().isEmpty()) {
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if (isLoggedIn.compareAndSet(true, false)) {
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super.logout();
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}
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}
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