package org.apache.hadoop.hdfs;
import java.io.IOException;
import java.io.EOFException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.hdfs.protocol.ClientProtocol;
import org.apache.hadoop.hdfs.util.InjectionEvent;
import org.apache.hadoop.hdfs.util.InjectionHandler;
import org.junit.After;
import static org.junit.Assert.*;
import org.junit.Before;
import org.junit.Test;
public class TestAvatarCreateFile {
private static MiniAvatarCluster cluster;
private static Configuration conf;
private static FileSystem fs;
private static boolean pass = true;
private static Log LOG = LogFactory.getLog(TestAvatarCreateFile.class);
@Before
public void setUp() throws Exception {
MiniAvatarCluster.createAndStartZooKeeper();
conf = new Configuration();
conf.setInt("fs.avatar.failover.checkperiod", 1000);
conf.setLong("dfs.client.rpc.retry.sleep", 1000);
conf.setBoolean("fs.ha.retrywrites", true);
cluster = new MiniAvatarCluster(conf, 3, true, null, null);
fs = cluster.getFileSystem();
}
@After
public void tearDown() throws Exception {
cluster.shutDown();
MiniAvatarCluster.shutDownZooKeeper();
}
private static class FailoverThread extends Thread {
public void run() {
try {
// Wait for a few creates to fail.
Thread.sleep(20000);
cluster.failOver(true);
} catch (Exception e) {
LOG.error("Exception in failover :", e);
pass = false;
}
}
}
private class TestHandler extends InjectionHandler {
protected void _processEventIO(InjectionEvent event, Object... args)
throws IOException {
if (event == InjectionEvent.NAMENODE_AFTER_CREATE_FILE) {
InjectionHandler.clear();
throw new EOFException("FAIL create connection!");
}
}
}
@Test
public void testCreateFile() throws Exception {
InjectionHandler.set(new TestHandler());
cluster.clearZooKeeperNode(0);
ClientProtocol namenode = ((DistributedAvatarFileSystem) fs).getClient()
.getNameNodeRPC();
new FailoverThread().start();
FsPermission perm = new FsPermission((short) 0264);
namenode.create("/test", perm, ((DistributedAvatarFileSystem) fs)
.getClient().getClientName(), true, true, (short) 3, (long) 1024);
LOG.info("Done with create");
assertTrue(fs.exists(new Path("/test")));
assertTrue(pass);
}
@Test
public void testCreateFileWithoutOverwrite() throws Exception {
InjectionHandler.set(new TestHandler());
cluster.clearZooKeeperNode(0);
ClientProtocol namenode = ((DistributedAvatarFileSystem) fs).getClient()
.getNameNodeRPC();
new FailoverThread().start();
FsPermission perm = new FsPermission((short) 0264);
namenode.create("/test1", perm, ((DistributedAvatarFileSystem) fs)
.getClient().getClientName(), false, true, (short) 3, (long) 1024);
LOG.info("Done with create");
assertTrue(fs.exists(new Path("/test1")));
assertTrue(pass);
}
}