HDFS-3970. Fix bug causing rollback of HDFS upgrade to result in bad VERSION file. Contributed by Vinay and Andrew Wang.
git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1430038 13f79535-47bb-0310-9956-ffa450edef68
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@ -357,6 +357,9 @@ Release 2.0.3-alpha - Unreleased
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HDFS-4302. Fix fatal exception when starting NameNode with DEBUG logs
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(Eugene Koontz via todd)
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HDFS-3970. Fix bug causing rollback of HDFS upgrade to result in bad
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VERSION file. (Vinay and Andrew Wang via atm)
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BREAKDOWN OF HDFS-3077 SUBTASKS
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HDFS-3077. Quorum-based protocol for reading and writing edit logs.
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@ -78,6 +78,10 @@ public class BlockPoolSliceStorage extends Storage {
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this.clusterID = clusterId;
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}
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private BlockPoolSliceStorage() {
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super(NodeType.DATA_NODE);
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}
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/**
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* Analyze storage directories. Recover from previous transitions if required.
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*
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@ -378,7 +382,7 @@ public class BlockPoolSliceStorage extends Storage {
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if (!prevDir.exists())
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return;
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// read attributes out of the VERSION file of previous directory
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DataStorage prevInfo = new DataStorage();
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BlockPoolSliceStorage prevInfo = new BlockPoolSliceStorage();
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prevInfo.readPreviousVersionProperties(bpSd);
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// We allow rollback to a state, which is either consistent with
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@ -19,6 +19,7 @@ package org.apache.hadoop.hdfs;
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import static org.apache.hadoop.hdfs.server.common.HdfsServerConstants.NodeType.DATA_NODE;
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import static org.apache.hadoop.hdfs.server.common.HdfsServerConstants.NodeType.NAME_NODE;
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import static org.junit.Assert.*;
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import static org.junit.Assert.assertEquals;
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import static org.junit.Assert.assertFalse;
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import static org.junit.Assert.fail;
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@ -31,6 +32,7 @@ import java.util.List;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.apache.hadoop.conf.Configuration;
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import org.apache.hadoop.fs.Path;
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import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.NodeType;
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import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.StartupOption;
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import org.apache.hadoop.hdfs.server.common.StorageInfo;
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@ -176,6 +178,44 @@ public class TestDFSRollback {
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cluster.shutdown();
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UpgradeUtilities.createEmptyDirs(nameNodeDirs);
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UpgradeUtilities.createEmptyDirs(dataNodeDirs);
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log("Normal BlockPool rollback", numDirs);
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UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "current");
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UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "previous");
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cluster = new MiniDFSCluster.Builder(conf).numDataNodes(0)
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.format(false)
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.manageDataDfsDirs(false)
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.manageNameDfsDirs(false)
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.startupOption(StartupOption.ROLLBACK)
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.build();
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UpgradeUtilities.createDataNodeStorageDirs(dataNodeDirs, "current");
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UpgradeUtilities.createBlockPoolStorageDirs(dataNodeDirs, "current",
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UpgradeUtilities.getCurrentBlockPoolID(cluster));
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// Create a previous snapshot for the blockpool
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UpgradeUtilities.createBlockPoolStorageDirs(dataNodeDirs, "previous",
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UpgradeUtilities.getCurrentBlockPoolID(cluster));
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// Older LayoutVersion to make it rollback
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storageInfo = new StorageInfo(
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UpgradeUtilities.getCurrentLayoutVersion()+1,
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UpgradeUtilities.getCurrentNamespaceID(cluster),
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UpgradeUtilities.getCurrentClusterID(cluster),
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UpgradeUtilities.getCurrentFsscTime(cluster));
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// Create old VERSION file for each data dir
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for (int i=0; i<dataNodeDirs.length; i++) {
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Path bpPrevPath = new Path(dataNodeDirs[i] + "/current/"
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+ UpgradeUtilities.getCurrentBlockPoolID(cluster));
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UpgradeUtilities.createBlockPoolVersionFile(
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new File(bpPrevPath.toString()),
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storageInfo,
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UpgradeUtilities.getCurrentBlockPoolID(cluster));
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}
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cluster.startDataNodes(conf, 1, false, StartupOption.ROLLBACK, null);
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assertTrue(cluster.isDataNodeUp());
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cluster.shutdown();
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UpgradeUtilities.createEmptyDirs(nameNodeDirs);
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UpgradeUtilities.createEmptyDirs(dataNodeDirs);
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log("NameNode rollback without existing previous dir", numDirs);
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UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "current");
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