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HDFS-6031. Add back the "-rollingUpgrade started" namenode startup option; otherwise, namenode cannot start when the layout version is changed. 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-5535@1573040 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Tsz-wo Sze 2014-02-28 19:33:08 +00:00
parent 5409908026
commit 1bab14bb49
4 changed files with 35 additions and 11 deletions
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6
hadoop-hdfs-project/hadoop-hdfs/CHANGES_HDFS-5535.txt
View File

@ -33,7 +33,7 @@ HDFS-5535 subtasks:
so that the standby namenode can create checkpoints during upgrade.
(szetszwo & jing9)
HDFS-5535. Add BlockPoolSliceStorage 'trash' to handle block deletions
HDFS-5907. Add BlockPoolSliceStorage 'trash' to handle block deletions
during rolling upgrades. (Arpit Agarwal)
HDFS-5494. Merge Protobuf-based-FSImage code from trunk - fix build
@ -123,3 +123,7 @@ HDFS-5535 subtasks:
HDFS-6032. -rollingUpgrade query hits NPE after the NN restarts. (Haohui Mai
via jing9)
HDFS-6031. Add back the "-rollingUpgrade started" namenode startup option;
otherwise, namenode cannot start when the layout version is changed.
(szetszwo)

8
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/common/HdfsServerConstants.java
View File

@ -49,7 +49,7 @@ public final class HdfsServerConstants {
/** Startup options for rolling upgrade. */
public static enum RollingUpgradeStartupOption{
ROLLBACK, DOWNGRADE;
ROLLBACK, DOWNGRADE, STARTED;
private static final RollingUpgradeStartupOption[] VALUES = values();
@ -99,6 +99,12 @@ public final class HdfsServerConstants {
== RollingUpgradeStartupOption.DOWNGRADE;
}
public static boolean isRollingUpgradeStarted(StartupOption option) {
return option == ROLLINGUPGRADE
&& option.getRollingUpgradeStartupOption()
== RollingUpgradeStartupOption.STARTED;
}
private final String name;
// Used only with format and upgrade options

1
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSImage.java
View File

@ -217,6 +217,7 @@ public class FSImage implements Closeable {
NNStorage.checkVersionUpgradable(storage.getLayoutVersion());
}
if (startOpt != StartupOption.UPGRADE
&& !StartupOption.isRollingUpgradeStarted(startOpt)
&& layoutVersion < Storage.LAST_PRE_UPGRADE_LAYOUT_VERSION
&& layoutVersion != HdfsConstants.NAMENODE_LAYOUT_VERSION) {
throw new IOException(

23
hadoop-hdfs-project/hadoop-hdfs/src/site/xdoc/HdfsRollingUpgrade.xml
View File

@ -75,10 +75,14 @@
</li>
</ul></li>
<li>Upgrade Active and Standby <em>NNs</em><ol>
<li>Shutdown, upgrade and restart <em>NN2</em> as standby.</li>
<li>Shutdown and upgrade <em>NN2</em>.</li>
<li>Start <em>NN2</em> as standby with the
"<a href="#namenode_-rollingUpgrade"><code>-rollingUpgrade started</code></a>" option.</li>
<li>Failover from <em>NN1</em> to <em>NN2</em>
so that <em>NN2</em> becomes active and <em>NN1</em> becomes standby.</li>
<li>Shutdown, upgrade and restart <em>NN1</em> as standby.</li>
<li>Shutdown and upgrade <em>NN1</em>.</li>
<li>Start <em>NN1</em> as standby with the
"<a href="#namenode_-rollingUpgrade"><code>-rollingUpgrade started</code></a>" option.</li>
</ol></li>
<li>Upgrade <em>DNs</em><ol>
<li>Choose a small subset of datanodes (e.g. all datanodes under a particular rack).</li>
@ -132,7 +136,9 @@
<ul>
<li>Upgrade <em>NN</em> and <em>SNN</em><ol>
<li>Shutdown <em>SNN</em></li>
<li>Shutdown, upgrade and restart <em>NN</em></li>
<li>Shutdown and upgrade <em>NN</em>.</li>
<li>Start <em>NN</em> as standby with the
"<a href="#namenode_-rollingUpgrade"><code>-rollingUpgrade started</code></a>" option.</li>
<li>Upgrade and restart <em>SNN</em></li>
</ol></li>
</ul>
@ -248,9 +254,11 @@
<subsection name="NameNode Startup Options" id="dfsadminCommands">
<h4><code>namenode -rollingUpgrade</code></h4>
<source>hdfs namenode -rollingUpgrade &lt;downgrade|rollback&gt;</source>
<source>hdfs namenode -rollingUpgrade &lt;downgrade|rollback|started&gt;</source>
<p>
Downgrade or rollback an ongoing rolling upgrade.
When a rolling upgrade is in progress,
the <code>-rollingUpgrade</code> namenode startup option is used to specify
various rolling upgrade options.
</p>
<ul><li>Options:<table>
<tr><td><code>downgrade</code></td>
@ -261,6 +269,11 @@
<td>Restores the namenode back to the pre-upgrade release
but also reverts the user data back to the pre-upgrade state.</td>
</tr>
<tr><td><code>started</code></td>
<td>Specifies a rolling upgrade already started
so that the namenode should allow image directories
with different layout versions during startup.</td>
</tr>
</table></li></ul>
</subsection>