[120] | 1 | package org.apache.hadoop.hdfs.server.namenode; |
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| 2 | |
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| 3 | import org.apache.hadoop.conf.Configuration; |
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| 4 | import org.apache.hadoop.fs.FileSystem; |
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| 5 | import org.apache.hadoop.fs.FsShell; |
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| 6 | import org.apache.hadoop.fs.Path; |
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| 7 | import org.apache.hadoop.hdfs.DFSTestUtil; |
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| 8 | import org.apache.hadoop.hdfs.MiniDFSCluster; |
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| 9 | import org.apache.hadoop.hdfs.protocol.Block; |
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| 10 | |
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| 11 | import junit.framework.TestCase; |
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| 12 | |
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| 13 | public class TestUnderReplicatedBlocks extends TestCase { |
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| 14 | public void testSetrepIncWithUnderReplicatedBlocks() throws Exception { |
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| 15 | Configuration conf = new Configuration(); |
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| 16 | final short REPLICATION_FACTOR = 2; |
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| 17 | final String FILE_NAME = "/testFile"; |
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| 18 | final Path FILE_PATH = new Path(FILE_NAME); |
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| 19 | MiniDFSCluster cluster = new MiniDFSCluster(conf, REPLICATION_FACTOR+1, true, null); |
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| 20 | try { |
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| 21 | // create a file with one block with a replication factor of 2 |
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| 22 | final FileSystem fs = cluster.getFileSystem(); |
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| 23 | DFSTestUtil.createFile(fs, FILE_PATH, 1L, REPLICATION_FACTOR, 1L); |
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| 24 | DFSTestUtil.waitReplication(fs, FILE_PATH, REPLICATION_FACTOR); |
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| 25 | |
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| 26 | // remove one replica from the blocksMap so block becomes under-replicated |
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| 27 | // but the block does not get put into the under-replicated blocks queue |
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| 28 | FSNamesystem namesystem = cluster.getNameNode().namesystem; |
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| 29 | Block b = DFSTestUtil.getFirstBlock(fs, FILE_PATH); |
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| 30 | DatanodeDescriptor dn = namesystem.blocksMap.nodeIterator(b).next(); |
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| 31 | namesystem.addToInvalidates(b, dn); |
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| 32 | namesystem.blocksMap.removeNode(b, dn); |
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| 33 | |
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| 34 | // increment this file's replication factor |
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| 35 | FsShell shell = new FsShell(conf); |
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| 36 | assertEquals(0, shell.run(new String[]{ |
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| 37 | "-setrep", "-w", Integer.toString(1+REPLICATION_FACTOR), FILE_NAME})); |
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| 38 | } finally { |
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| 39 | cluster.shutdown(); |
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| 40 | } |
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| 41 | |
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| 42 | } |
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| 43 | |
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| 44 | } |
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