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From su...@apache.org
Subject [28/50] [abbrv] hadoop git commit: YARN-5601. Make the RM epoch base value configurable. Contributed by Subru Krishnan
Date Tue, 11 Apr 2017 19:11:06 GMT
YARN-5601. Make the RM epoch base value configurable. Contributed by Subru Krishnan


Project: http://git-wip-us.apache.org/repos/asf/hadoop/repo
Commit: http://git-wip-us.apache.org/repos/asf/hadoop/commit/a682194b
Tree: http://git-wip-us.apache.org/repos/asf/hadoop/tree/a682194b
Diff: http://git-wip-us.apache.org/repos/asf/hadoop/diff/a682194b

Branch: refs/heads/YARN-2915
Commit: a682194b57ea3ee008aa02e3349ca87d5fb0dbc5
Parents: e94d600
Author: Jian He <jianhe@apache.org>
Authored: Fri Sep 2 12:23:57 2016 +0800
Committer: Subru Krishnan <subru@apache.org>
Committed: Tue Apr 11 12:08:36 2017 -0700

----------------------------------------------------------------------
 .../hadoop-yarn/dev-support/findbugs-exclude.xml             | 5 ++++-
 .../java/org/apache/hadoop/yarn/conf/YarnConfiguration.java  | 3 +++
 .../apache/hadoop/yarn/conf/TestYarnConfigurationFields.java | 2 ++
 .../hadoop/yarn/server/resourcemanager/ResourceManager.java  | 7 +++++++
 .../resourcemanager/recovery/FileSystemRMStateStore.java     | 2 +-
 .../server/resourcemanager/recovery/LeveldbRMStateStore.java | 2 +-
 .../server/resourcemanager/recovery/MemoryRMStateStore.java  | 1 +
 .../yarn/server/resourcemanager/recovery/RMStateStore.java   | 4 ++++
 .../yarn/server/resourcemanager/recovery/ZKRMStateStore.java | 2 +-
 .../resourcemanager/recovery/RMStateStoreTestBase.java       | 8 +++++---
 .../server/resourcemanager/recovery/TestFSRMStateStore.java  | 1 +
 .../resourcemanager/recovery/TestLeveldbRMStateStore.java    | 1 +
 .../server/resourcemanager/recovery/TestZKRMStateStore.java  | 1 +
 13 files changed, 32 insertions(+), 7 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/hadoop/blob/a682194b/hadoop-yarn-project/hadoop-yarn/dev-support/findbugs-exclude.xml
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/dev-support/findbugs-exclude.xml b/hadoop-yarn-project/hadoop-yarn/dev-support/findbugs-exclude.xml
index 2f5451d..bbd03a9 100644
--- a/hadoop-yarn-project/hadoop-yarn/dev-support/findbugs-exclude.xml
+++ b/hadoop-yarn-project/hadoop-yarn/dev-support/findbugs-exclude.xml
@@ -293,7 +293,10 @@
   </Match>
   <Match>
     <Class name="org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore"
/>
-    <Field name="resourceManager"/>
+    <Or>
+      <Field name="resourceManager"/>
+      <Field name="baseEpoch"/>
+    </Or>
     <Bug pattern="IS2_INCONSISTENT_SYNC" />
   </Match>
   <Match>

http://git-wip-us.apache.org/repos/asf/hadoop/blob/a682194b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/conf/YarnConfiguration.java
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/conf/YarnConfiguration.java
b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/conf/YarnConfiguration.java
index 482eb95..6bc21fd 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/conf/YarnConfiguration.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/conf/YarnConfiguration.java
@@ -143,6 +143,9 @@ public class YarnConfiguration extends Configuration {
 
   public static final String RM_HOSTNAME = RM_PREFIX + "hostname";
 
+  public static final String RM_EPOCH = RM_PREFIX + "epoch";
+  public static final long DEFAULT_RM_EPOCH = 0L;
+
   /** The address of the applications manager interface in the RM.*/
   public static final String RM_ADDRESS = 
     RM_PREFIX + "address";

http://git-wip-us.apache.org/repos/asf/hadoop/blob/a682194b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/test/java/org/apache/hadoop/yarn/conf/TestYarnConfigurationFields.java
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/test/java/org/apache/hadoop/yarn/conf/TestYarnConfigurationFields.java
b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/test/java/org/apache/hadoop/yarn/conf/TestYarnConfigurationFields.java
index 5e0876f..3f3a06c 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/test/java/org/apache/hadoop/yarn/conf/TestYarnConfigurationFields.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/test/java/org/apache/hadoop/yarn/conf/TestYarnConfigurationFields.java
@@ -75,6 +75,8 @@ public class TestYarnConfigurationFields extends TestConfigurationFieldsBase
{
         .add(YarnConfiguration.FEDERATION_FAILOVER_ENABLED);
     configurationPropsToSkipCompare
         .add(YarnConfiguration.FEDERATION_STATESTORE_HEARTBEAT_INTERVAL_SECS);
+    configurationPropsToSkipCompare
+        .add(YarnConfiguration.RM_EPOCH);
 
     // Ignore blacklisting nodes for AM failures feature since it is still a
     // "work in progress"

http://git-wip-us.apache.org/repos/asf/hadoop/blob/a682194b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/ResourceManager.java
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/ResourceManager.java
b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/ResourceManager.java
index 97ecc0d..2c3162c 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/ResourceManager.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/ResourceManager.java
@@ -781,6 +781,13 @@ public class ResourceManager extends CompositeService implements Recoverable
{
           LOG.error("Failed to load/recover state", e);
           throw e;
         }
+      } else {
+        if (HAUtil.isFederationEnabled(conf)) {
+          long epoch = conf.getLong(YarnConfiguration.RM_EPOCH,
+              YarnConfiguration.DEFAULT_RM_EPOCH);
+          rmContext.setEpoch(epoch);
+          LOG.info("Epoch set for Federation: " + epoch);
+        }
       }
 
       super.serviceStart();

http://git-wip-us.apache.org/repos/asf/hadoop/blob/a682194b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/FileSystemRMStateStore.java
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/FileSystemRMStateStore.java
b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/FileSystemRMStateStore.java
index 9591945..7cbeda3 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/FileSystemRMStateStore.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/FileSystemRMStateStore.java
@@ -197,7 +197,7 @@ public class FileSystemRMStateStore extends RMStateStore {
   @Override
   public synchronized long getAndIncrementEpoch() throws Exception {
     Path epochNodePath = getNodePath(rootDirPath, EPOCH_NODE);
-    long currentEpoch = 0;
+    long currentEpoch = baseEpoch;
     FileStatus status = getFileStatusWithRetries(epochNodePath);
     if (status != null) {
       // load current epoch

http://git-wip-us.apache.org/repos/asf/hadoop/blob/a682194b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/LeveldbRMStateStore.java
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/LeveldbRMStateStore.java
b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/LeveldbRMStateStore.java
index 2ca53db..16ae1d3 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/LeveldbRMStateStore.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/LeveldbRMStateStore.java
@@ -255,7 +255,7 @@ public class LeveldbRMStateStore extends RMStateStore {
 
   @Override
   public synchronized long getAndIncrementEpoch() throws Exception {
-    long currentEpoch = 0;
+    long currentEpoch = baseEpoch;
     byte[] dbKeyBytes = bytes(EPOCH_NODE);
     try {
       byte[] data = db.get(dbKeyBytes);

http://git-wip-us.apache.org/repos/asf/hadoop/blob/a682194b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/MemoryRMStateStore.java
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/MemoryRMStateStore.java
b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/MemoryRMStateStore.java
index 5f3328b..5041000 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/MemoryRMStateStore.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/MemoryRMStateStore.java
@@ -83,6 +83,7 @@ public class MemoryRMStateStore extends RMStateStore {
   
   @Override
   public synchronized void initInternal(Configuration conf) {
+    epoch = baseEpoch;
   }
 
   @Override

http://git-wip-us.apache.org/repos/asf/hadoop/blob/a682194b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/RMStateStore.java
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/RMStateStore.java
b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/RMStateStore.java
index 5e3cf22..2a1948a 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/RMStateStore.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/RMStateStore.java
@@ -99,6 +99,7 @@ public abstract class RMStateStore extends AbstractService {
       "ReservationSystemRoot";
   protected static final String VERSION_NODE = "RMVersionNode";
   protected static final String EPOCH_NODE = "EpochNode";
+  protected long baseEpoch;
   protected ResourceManager resourceManager;
   private final ReadLock readLock;
   private final WriteLock writeLock;
@@ -684,6 +685,9 @@ public abstract class RMStateStore extends AbstractService {
     dispatcher.register(RMStateStoreEventType.class, 
                         rmStateStoreEventHandler);
     dispatcher.setDrainEventsOnStop();
+    // read the base epoch value from conf
+    baseEpoch = conf.getLong(YarnConfiguration.RM_EPOCH,
+        YarnConfiguration.DEFAULT_RM_EPOCH);
     initInternal(conf);
   }
 

http://git-wip-us.apache.org/repos/asf/hadoop/blob/a682194b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/ZKRMStateStore.java
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/ZKRMStateStore.java
b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/ZKRMStateStore.java
index 1212a91..3cc7faa 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/ZKRMStateStore.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/ZKRMStateStore.java
@@ -353,7 +353,7 @@ public class ZKRMStateStore extends RMStateStore {
   @Override
   public synchronized long getAndIncrementEpoch() throws Exception {
     String epochNodePath = getNodePath(zkRootNodePath, EPOCH_NODE);
-    long currentEpoch = 0;
+    long currentEpoch = baseEpoch;
 
     if (exists(epochNodePath)) {
       // load current epoch

http://git-wip-us.apache.org/repos/asf/hadoop/blob/a682194b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/RMStateStoreTestBase.java
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/RMStateStoreTestBase.java
b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/RMStateStoreTestBase.java
index 514e9a0..771c16e 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/RMStateStoreTestBase.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/RMStateStoreTestBase.java
@@ -91,6 +91,8 @@ public class RMStateStoreTestBase {
 
   public static final Log LOG = LogFactory.getLog(RMStateStoreTestBase.class);
 
+  protected final long epoch = 10L;
+
   static class TestDispatcher implements Dispatcher, EventHandler<Event> {
 
     ApplicationAttemptId attemptId;
@@ -558,13 +560,13 @@ public class RMStateStoreTestBase {
     store.setRMDispatcher(new TestDispatcher());
     
     long firstTimeEpoch = store.getAndIncrementEpoch();
-    Assert.assertEquals(0, firstTimeEpoch);
+    Assert.assertEquals(epoch, firstTimeEpoch);
     
     long secondTimeEpoch = store.getAndIncrementEpoch();
-    Assert.assertEquals(1, secondTimeEpoch);
+    Assert.assertEquals(epoch + 1, secondTimeEpoch);
     
     long thirdTimeEpoch = store.getAndIncrementEpoch();
-    Assert.assertEquals(2, thirdTimeEpoch);
+    Assert.assertEquals(epoch + 2, thirdTimeEpoch);
   }
 
   public void testAppDeletion(RMStateStoreHelper stateStoreHelper)

http://git-wip-us.apache.org/repos/asf/hadoop/blob/a682194b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/TestFSRMStateStore.java
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/TestFSRMStateStore.java
b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/TestFSRMStateStore.java
index 6f0d53f..8c968cc 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/TestFSRMStateStore.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/TestFSRMStateStore.java
@@ -116,6 +116,7 @@ public class TestFSRMStateStore extends RMStateStoreTestBase {
       conf.setInt(YarnConfiguration.FS_RM_STATE_STORE_NUM_RETRIES, 8);
       conf.setLong(YarnConfiguration.FS_RM_STATE_STORE_RETRY_INTERVAL_MS,
               900L);
+      conf.setLong(YarnConfiguration.RM_EPOCH, epoch);
       if (adminCheckEnable) {
         conf.setBoolean(
           YarnConfiguration.YARN_INTERMEDIATE_DATA_ENCRYPTION, true);

http://git-wip-us.apache.org/repos/asf/hadoop/blob/a682194b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/TestLeveldbRMStateStore.java
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/TestLeveldbRMStateStore.java
b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/TestLeveldbRMStateStore.java
index 51adbe1..02ce9a6 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/TestLeveldbRMStateStore.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/TestLeveldbRMStateStore.java
@@ -82,6 +82,7 @@ public class TestLeveldbRMStateStore extends RMStateStoreTestBase {
 
   @Test(timeout = 60000)
   public void testEpoch() throws Exception {
+    conf.setLong(YarnConfiguration.RM_EPOCH, epoch);
     LeveldbStateStoreTester tester = new LeveldbStateStoreTester();
     testEpoch(tester);
   }

http://git-wip-us.apache.org/repos/asf/hadoop/blob/a682194b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/TestZKRMStateStore.java
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/TestZKRMStateStore.java
b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/TestZKRMStateStore.java
index f71cf25..22eadea 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/TestZKRMStateStore.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/TestZKRMStateStore.java
@@ -155,6 +155,7 @@ public class TestZKRMStateStore extends RMStateStoreTestBase {
       conf.set(YarnConfiguration.RM_ZK_ADDRESS,
           curatorTestingServer.getConnectString());
       conf.set(YarnConfiguration.ZK_RM_STATE_STORE_PARENT_PATH, workingZnode);
+      conf.setLong(YarnConfiguration.RM_EPOCH, epoch);
       this.store = new TestZKRMStateStoreInternal(conf, workingZnode);
       return this.store;
     }


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