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HDFS-2111. Add tests for ensuring that the DN will start with a few bad data directories. Contributed by Harsh J Chouraria.

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git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1144100 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Todd Lipcon 2011-07-08 00:16:07 +00:00
parent 86236dd6c4
commit 209fd3f9fc
2 changed files with 51 additions and 1 deletions
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3
hdfs/CHANGES.txt
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@ -540,6 +540,9 @@ Trunk (unreleased changes)
HDFS-2109. Store uMask as member variable to DFSClient.Conf. (Bharath
Mundlapudi via szetszwo)
HDFS-2111. Add tests for ensuring that the DN will start with a few bad
data directories. (Harsh J Chouraria via todd)
OPTIMIZATIONS
HDFS-1458. Improve checkpoint performance by avoiding unnecessary image

49
hdfs/src/test/hdfs/org/apache/hadoop/hdfs/server/datanode/TestDataNodeVolumeFailureToleration.java
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@ -24,7 +24,6 @@
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.FileUtil;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.hdfs.DFSTestUtil;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.server.namenode.FSNamesystem;
@ -93,6 +92,54 @@ public void tearDown() throws Exception {
cluster.shutdown();
}
/**
* Test the DFS_DATANODE_FAILED_VOLUMES_TOLERATED_KEY configuration
* option, ie the DN tolerates a failed-to-use scenario during
* its start-up.
*/
@Test
public void testValidVolumesAtStartup() throws Exception {
assumeTrue(!System.getProperty("os.name").startsWith("Windows"));
// Make sure no DNs are running.
cluster.shutdownDataNodes();
// Bring up a datanode with two default data dirs, but with one bad one.
conf.setInt(DFSConfigKeys.DFS_DATANODE_FAILED_VOLUMES_TOLERATED_KEY, 1);
// We use subdirectories 0 and 1 in order to have only a single
// data dir's parent inject a failure.
File tld = new File(MiniDFSCluster.getBaseDirectory(), "badData");
File dataDir1 = new File(tld, "data1");
File dataDir1Actual = new File(dataDir1, "1");
dataDir1Actual.mkdirs();
// Force an IOE to occur on one of the dfs.data.dir.
File dataDir2 = new File(tld, "data2");
prepareDirToFail(dataDir2);
File dataDir2Actual = new File(dataDir2, "2");
// Start one DN, with manually managed DN dir
conf.set(DFSConfigKeys.DFS_DATANODE_DATA_DIR_KEY,
dataDir1Actual.getPath() + "," + dataDir2Actual.getPath());
cluster.startDataNodes(conf, 1, false, null, null);
cluster.waitActive();
try {
assertTrue("The DN should have started up fine.",
cluster.isDataNodeUp());
DataNode dn = cluster.getDataNodes().get(0);
String si = dn.getFSDataset().getStorageInfo();
assertTrue("The DN should have started with this directory",
si.contains(dataDir1Actual.getPath()));
assertFalse("The DN shouldn't have a bad directory.",
si.contains(dataDir2Actual.getPath()));
} finally {
cluster.shutdownDataNodes();
FileUtil.chmod(dataDir2.toString(), "755");
}
}
/**
* Test the DFS_DATANODE_FAILED_VOLUMES_TOLERATED_KEY configuration
* option, ie the DN shuts itself down when the number of failures