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HADOOP-9212. Potential deadlock in FileSystem.Cache/IPC/UGI. 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1433879 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Thomas White 2013-01-16 10:20:11 +00:00
parent 5b0187dcd3
commit 0d143ad723
3 changed files with 35 additions and 4 deletions
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2
hadoop-common-project/hadoop-common/CHANGES.txt
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@ -554,6 +554,8 @@ Release 2.0.3-alpha - Unreleased
HADOOP-8816. HTTP Error 413 full HEAD if using kerberos authentication.
(moritzmoeller via tucu)
HADOOP-9212. Potential deadlock in FileSystem.Cache/IPC/UGI. (tomwhite)
Release 2.0.2-alpha - 2012-09-07

29
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/Credentials.java
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@ -18,10 +18,13 @@
package org.apache.hadoop.security;
import java.io.BufferedInputStream;
import java.io.DataInput;
import java.io.DataInputStream;
import java.io.DataOutput;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Arrays;
import java.util.Collection;
@ -148,8 +151,32 @@ public class Credentials implements Writable {
in.close();
return credentials;
} catch(IOException ioe) {
IOUtils.cleanup(LOG, in);
throw new IOException("Exception reading " + filename, ioe);
} finally {
IOUtils.cleanup(LOG, in);
}
}
/**
* Convenience method for reading a token storage file, and loading the Tokens
* therein in the passed UGI
* @param filename
* @param conf
* @throws IOException
*/
public static Credentials readTokenStorageFile(File filename, Configuration conf)
throws IOException {
DataInputStream in = null;
Credentials credentials = new Credentials();
try {
in = new DataInputStream(new BufferedInputStream(
new FileInputStream(filename)));
credentials.readTokenStorageStream(in);
return credentials;
} catch(IOException ioe) {
throw new IOException("Exception reading " + filename, ioe);
} finally {
IOUtils.cleanup(LOG, in);
}
}

8
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/UserGroupInformation.java
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@ -20,6 +20,7 @@ package org.apache.hadoop.security;
import static org.apache.hadoop.fs.CommonConfigurationKeys.HADOOP_KERBEROS_MIN_SECONDS_BEFORE_RELOGIN;
import static org.apache.hadoop.fs.CommonConfigurationKeys.HADOOP_KERBEROS_MIN_SECONDS_BEFORE_RELOGIN_DEFAULT;
import java.io.File;
import java.io.IOException;
import java.lang.reflect.UndeclaredThrowableException;
import java.security.AccessControlContext;
@ -656,10 +657,11 @@ public class UserGroupInformation {
String fileLocation = System.getenv(HADOOP_TOKEN_FILE_LOCATION);
if (fileLocation != null) {
// load the token storage file and put all of the tokens into the
// user.
// Load the token storage file and put all of the tokens into the
// user. Don't use the FileSystem API for reading since it has a lock
// cycle (HADOOP-9212).
Credentials cred = Credentials.readTokenStorageFile(
new Path("file:///" + fileLocation), conf);
new File(fileLocation), conf);
loginUser.addCredentials(cred);
}
loginUser.spawnAutoRenewalThreadForUserCreds();