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HADOOP-15708. Reading values from Configuration before adding deprecations make it impossible to read value with deprecated key (zsiegl via rkanter)

This commit is contained in:
Robert Kanter 2018-10-10 18:51:37 -07:00
parent 2bd000c851
commit f261c31937
2 changed files with 88 additions and 26 deletions
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24
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/conf/Configuration.java
View File

@ -709,6 +709,9 @@ public class Configuration implements Iterable<Map.Entry<String,String>>,
* deprecated key, the value of the deprecated key is set as the value for
* the provided property name.
*
* Also updates properties and overlays with deprecated keys, if the new
* key does not already exist.
*
* @param deprecations deprecation context
* @param name the property name
* @return the first property in the list of properties mapping
@ -730,6 +733,11 @@ public class Configuration implements Iterable<Map.Entry<String,String>>,
// Override return value for deprecated keys
names = keyInfo.newKeys;
}
// Update properties with deprecated key if already loaded and new
// deprecation has been added
updatePropertiesWithDeprecatedKeys(deprecations, names);
// If there are no overlay values we can return early
Properties overlayProperties = getOverlay();
if (overlayProperties.isEmpty()) {
@ -749,6 +757,19 @@ public class Configuration implements Iterable<Map.Entry<String,String>>,
return names;
}
private void updatePropertiesWithDeprecatedKeys(
DeprecationContext deprecations, String[] newNames) {
for (String newName : newNames) {
String deprecatedKey = deprecations.getReverseDeprecatedKeyMap().get(newName);
if (deprecatedKey != null && !getProps().containsKey(newName)) {
String deprecatedValue = getProps().getProperty(deprecatedKey);
if (deprecatedValue != null) {
getProps().setProperty(newName, deprecatedValue);
}
}
}
}
private void handleDeprecation() {
LOG.debug("Handling deprecation for all properties in config...");
DeprecationContext deprecations = deprecationContext.get();
@ -1189,6 +1210,9 @@ public class Configuration implements Iterable<Map.Entry<String,String>>,
* Values are processed for <a href="#VariableExpansion">variable expansion</a>
* before being returned.
*
* As a side effect get loads the properties from the sources if called for
* the first time as a lazy init.
*
* @param name the property name, will be trimmed before get value.
* @return the value of the <code>name</code> or its replacing property,
* or null if no such property exists.

88
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/conf/TestConfigurationDeprecation.java
View File

@ -38,6 +38,7 @@ import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import org.apache.hadoop.fs.CommonConfigurationKeys;
import org.junit.Assert;
import org.apache.hadoop.fs.Path;
@ -52,9 +53,14 @@ import com.google.common.util.concurrent.Uninterruptibles;
public class TestConfigurationDeprecation {
private Configuration conf;
final static String CONFIG = new File("./test-config-TestConfigurationDeprecation.xml").getAbsolutePath();
final static String CONFIG2 = new File("./test-config2-TestConfigurationDeprecation.xml").getAbsolutePath();
final static String CONFIG3 = new File("./test-config3-TestConfigurationDeprecation.xml").getAbsolutePath();
final static String CONFIG = new File("./test-config" +
"-TestConfigurationDeprecation.xml").getAbsolutePath();
final static String CONFIG2 = new File("./test-config2" +
"-TestConfigurationDeprecation.xml").getAbsolutePath();
final static String CONFIG3 = new File("./test-config3" +
"-TestConfigurationDeprecation.xml").getAbsolutePath();
final static String CONFIG4 = new File("./test-config4" +
"-TestConfigurationDeprecation.xml").getAbsolutePath();
BufferedWriter out;
static {
@ -288,14 +294,14 @@ public class TestConfigurationDeprecation {
@Test
public void testIteratorWithDeprecatedKeys() {
Configuration conf = new Configuration();
Configuration.addDeprecation("dK", new String[]{"nK"});
Configuration.addDeprecation("dK_iterator", new String[]{"nK_iterator"});
conf.set("k", "v");
conf.set("dK", "V");
assertEquals("V", conf.get("dK"));
assertEquals("V", conf.get("nK"));
conf.set("nK", "VV");
assertEquals("VV", conf.get("dK"));
assertEquals("VV", conf.get("nK"));
conf.set("dK_iterator", "V");
assertEquals("V", conf.get("dK_iterator"));
assertEquals("V", conf.get("nK_iterator"));
conf.set("nK_iterator", "VV");
assertEquals("VV", conf.get("dK_iterator"));
assertEquals("VV", conf.get("nK_iterator"));
boolean kFound = false;
boolean dKFound = false;
boolean nKFound = false;
@ -304,11 +310,11 @@ public class TestConfigurationDeprecation {
assertEquals("v", entry.getValue());
kFound = true;
}
if (entry.getKey().equals("dK")) {
if (entry.getKey().equals("dK_iterator")) {
assertEquals("VV", entry.getValue());
dKFound = true;
}
if (entry.getKey().equals("nK")) {
if (entry.getKey().equals("nK_iterator")) {
assertEquals("VV", entry.getValue());
nKFound = true;
}
@ -321,19 +327,19 @@ public class TestConfigurationDeprecation {
@Test
public void testUnsetWithDeprecatedKeys() {
Configuration conf = new Configuration();
Configuration.addDeprecation("dK", new String[]{"nK"});
conf.set("nK", "VV");
assertEquals("VV", conf.get("dK"));
assertEquals("VV", conf.get("nK"));
conf.unset("dK");
assertNull(conf.get("dK"));
assertNull(conf.get("nK"));
conf.set("nK", "VV");
assertEquals("VV", conf.get("dK"));
assertEquals("VV", conf.get("nK"));
conf.unset("nK");
assertNull(conf.get("dK"));
assertNull(conf.get("nK"));
Configuration.addDeprecation("dK_unset", new String[]{"nK_unset"});
conf.set("nK_unset", "VV");
assertEquals("VV", conf.get("dK_unset"));
assertEquals("VV", conf.get("nK_unset"));
conf.unset("dK_unset");
assertNull(conf.get("dK_unset"));
assertNull(conf.get("nK_unset"));
conf.set("nK_unset", "VV");
assertEquals("VV", conf.get("dK_unset"));
assertEquals("VV", conf.get("nK_unset"));
conf.unset("nK_unset");
assertNull(conf.get("dK_unset"));
assertNull(conf.get("nK_unset"));
}
private static String getTestKeyName(int threadIndex, int testIndex) {
@ -426,4 +432,36 @@ public class TestConfigurationDeprecation {
assertEquals(null, conf.get("Z"));
assertEquals(null, conf.get("X"));
}
@Test
public void testGetPropertyBeforeDeprecetionsAreSet() throws Exception {
// SETUP
final String oldZkAddressKey = "yarn.resourcemanager.zk-address";
final String newZkAddressKey = CommonConfigurationKeys.ZK_ADDRESS;
final String zkAddressValue = "dummyZkAddress";
try{
out = new BufferedWriter(new FileWriter(CONFIG4));
startConfig();
appendProperty(oldZkAddressKey, zkAddressValue);
endConfig();
Path fileResource = new Path(CONFIG4);
conf.addResource(fileResource);
} finally {
out.close();
}
// ACT
conf.get(oldZkAddressKey);
Configuration.addDeprecations(new Configuration.DeprecationDelta[] {
new Configuration.DeprecationDelta(oldZkAddressKey, newZkAddressKey)});
// ASSERT
assertEquals("Property should be accessible through deprecated key",
zkAddressValue, conf.get(oldZkAddressKey));
assertEquals("Property should be accessible through new key",
zkAddressValue, conf.get(newZkAddressKey));
}
}