diff --git a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
index e0fdbc1f49f..0a8c079cd19 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
+++ b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
@@ -127,6 +127,8 @@ Release 2.0.1-alpha - UNRELEASED
HDFS-3474. Cleanup Exception handling in BookKeeper journal manager.
(Ivan Kelly via umamahesh)
+ HDFS-3468. Make BKJM-ZK session timeout configurable. (umamahesh)
+
Release 2.0.0-alpha - UNRELEASED
INCOMPATIBLE CHANGES
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/contrib/bkjournal/src/main/java/org/apache/hadoop/contrib/bkjournal/BookKeeperJournalManager.java b/hadoop-hdfs-project/hadoop-hdfs/src/contrib/bkjournal/src/main/java/org/apache/hadoop/contrib/bkjournal/BookKeeperJournalManager.java
index e3a83e07473..97553172fea 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/contrib/bkjournal/src/main/java/org/apache/hadoop/contrib/bkjournal/BookKeeperJournalManager.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/contrib/bkjournal/src/main/java/org/apache/hadoop/contrib/bkjournal/BookKeeperJournalManager.java
@@ -91,6 +91,10 @@ import org.apache.commons.logging.LogFactory;
* Default is 2.
*
dfs.namenode.bookkeeperjournal.digestPw
* Password to use when creating ledgers.
+ * dfs.namenode.bookkeeperjournal.zk.session.timeout
+ * Session timeout for Zookeeper client from BookKeeper Journal Manager.
+ * Hadoop recommends that, this value should be less than the ZKFC
+ * session timeout value. Default value is 3000.
*
*/
public class BookKeeperJournalManager implements JournalManager {
@@ -113,6 +117,10 @@ public class BookKeeperJournalManager implements JournalManager {
public static final String BKJM_BOOKKEEPER_DIGEST_PW_DEFAULT = "";
private static final int BKJM_LAYOUT_VERSION = -1;
+
+ public static final String BKJM_ZK_SESSION_TIMEOUT
+ = "dfs.namenode.bookkeeperjournal.zk.session.timeout";
+ public static final int BKJM_ZK_SESSION_TIMEOUT_DEFAULT = 3000;
private final ZooKeeper zkc;
private final Configuration conf;
@@ -162,7 +170,8 @@ public class BookKeeperJournalManager implements JournalManager {
try {
zkConnectLatch = new CountDownLatch(1);
- zkc = new ZooKeeper(zkConnect, 3000, new ZkConnectionWatcher());
+ zkc = new ZooKeeper(zkConnect, conf.getInt(BKJM_ZK_SESSION_TIMEOUT,
+ BKJM_ZK_SESSION_TIMEOUT_DEFAULT), new ZkConnectionWatcher());
if (!zkConnectLatch.await(6000, TimeUnit.MILLISECONDS)) {
throw new IOException("Error connecting to zookeeper");
}