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HDFS-14193. RBF: Inconsistency with the Default Namespace. Contributed by Ayush Saxena.

This commit is contained in:
Vinayakumar B 2019-01-16 18:06:17 +05:30 committed by Brahma Reddy Battula
parent 7b61cbf672
commit c012b09fb6
2 changed files with 16 additions and 43 deletions
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27
hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/resolver/MountTableResolver.java
View File

@ -17,8 +17,6 @@
*/
package org.apache.hadoop.hdfs.server.federation.resolver;
import static org.apache.hadoop.hdfs.client.HdfsClientConfigKeys.DFS_NAMESERVICES;
import static org.apache.hadoop.hdfs.client.HdfsClientConfigKeys.DeprecatedKeys.DFS_NAMESERVICE_ID;
import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.DFS_ROUTER_DEFAULT_NAMESERVICE;
import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.DFS_ROUTER_DEFAULT_NAMESERVICE_ENABLE;
import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.DFS_ROUTER_DEFAULT_NAMESERVICE_ENABLE_DEFAULT;
@ -50,8 +48,6 @@
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hdfs.DFSUtil;
import org.apache.hadoop.hdfs.DFSUtilClient;
import org.apache.hadoop.hdfs.server.federation.resolver.order.DestinationOrder;
import org.apache.hadoop.hdfs.server.federation.router.Router;
import org.apache.hadoop.hdfs.server.federation.store.MountTableStore;
@ -163,33 +159,22 @@ private void registerCacheExternal() {
* @param conf Configuration for this resolver.
*/
private void initDefaultNameService(Configuration conf) {
this.defaultNameService = conf.get(
DFS_ROUTER_DEFAULT_NAMESERVICE,
DFSUtil.getNamenodeNameServiceId(conf));
this.defaultNSEnable = conf.getBoolean(
DFS_ROUTER_DEFAULT_NAMESERVICE_ENABLE,
DFS_ROUTER_DEFAULT_NAMESERVICE_ENABLE_DEFAULT);
if (defaultNameService == null) {
LOG.warn(
"{} and {} is not set. Fallback to {} as the default name service.",
DFS_ROUTER_DEFAULT_NAMESERVICE, DFS_NAMESERVICE_ID, DFS_NAMESERVICES);
Collection<String> nsIds = DFSUtilClient.getNameServiceIds(conf);
if (nsIds.isEmpty()) {
this.defaultNameService = "";
} else {
this.defaultNameService = nsIds.iterator().next();
}
if (!this.defaultNSEnable) {
LOG.warn("Default name service is disabled.");
return;
}
this.defaultNameService = conf.get(DFS_ROUTER_DEFAULT_NAMESERVICE, "");
if (this.defaultNameService.equals("")) {
this.defaultNSEnable = false;
LOG.warn("Default name service is not set.");
} else {
String enable = this.defaultNSEnable ? "enabled" : "disabled";
LOG.info("Default name service: {}, {} to read or write",
this.defaultNameService, enable);
LOG.info("Default name service: {}, enabled to read or write",
this.defaultNameService);
}
}

32
hadoop-hdfs-project/hadoop-hdfs-rbf/src/test/java/org/apache/hadoop/hdfs/server/federation/resolver/TestInitializeMountTableResolver.java
View File

@ -23,7 +23,9 @@
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMESERVICE_ID;
import static org.apache.hadoop.hdfs.client.HdfsClientConfigKeys.DFS_NAMESERVICES;
import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.DFS_ROUTER_DEFAULT_NAMESERVICE;
import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.DFS_ROUTER_DEFAULT_NAMESERVICE_ENABLE;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
/**
* Test {@link MountTableResolver} initialization.
@ -43,40 +45,26 @@ public void testDefaultNameserviceWithEmptyString() {
conf.set(DFS_ROUTER_DEFAULT_NAMESERVICE, "");
MountTableResolver mountTable = new MountTableResolver(conf);
assertEquals("", mountTable.getDefaultNamespace());
assertFalse("Default NS should be disabled if default NS is set empty",
mountTable.isDefaultNSEnable());
}
@Test
public void testRouterDefaultNameservice() {
Configuration conf = new Configuration();
conf.set(DFS_ROUTER_DEFAULT_NAMESERVICE, "router_ns"); // this is priority
conf.set(DFS_NAMESERVICE_ID, "ns_id");
conf.set(DFS_NAMESERVICES, "nss");
conf.set(DFS_ROUTER_DEFAULT_NAMESERVICE, "router_ns");
MountTableResolver mountTable = new MountTableResolver(conf);
assertEquals("router_ns", mountTable.getDefaultNamespace());
}
// Default NS should be empty if configured false.
@Test
public void testNameserviceID() {
public void testRouterDefaultNameserviceDisabled() {
Configuration conf = new Configuration();
conf.set(DFS_NAMESERVICE_ID, "ns_id"); // this is priority
conf.setBoolean(DFS_ROUTER_DEFAULT_NAMESERVICE_ENABLE, false);
conf.set(DFS_NAMESERVICE_ID, "ns_id");
conf.set(DFS_NAMESERVICES, "nss");
MountTableResolver mountTable = new MountTableResolver(conf);
assertEquals("ns_id", mountTable.getDefaultNamespace());
}
@Test
public void testSingleNameservices() {
Configuration conf = new Configuration();
conf.set(DFS_NAMESERVICES, "ns1");
MountTableResolver mountTable = new MountTableResolver(conf);
assertEquals("ns1", mountTable.getDefaultNamespace());
}
@Test
public void testMultipleNameservices() {
Configuration conf = new Configuration();
conf.set(DFS_NAMESERVICES, "ns1,ns2");
MountTableResolver mountTable = new MountTableResolver(conf);
assertEquals("ns1", mountTable.getDefaultNamespace());
assertEquals("", mountTable.getDefaultNamespace());
}
}