YARN-8574. Allow dot in attribute values. Contributed by Bibin A Chundatt.

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/nodelabels/NodeLabelUtil.java

@@ -38,6 +38,8 @@ public final class NodeLabelUtil {
       Pattern.compile("^[0-9a-zA-Z][0-9a-zA-Z-_]*");
   private static final Pattern PREFIX_PATTERN =
       Pattern.compile("^[0-9a-zA-Z][0-9a-zA-Z-_\\.]*");
+  private static final Pattern ATTRIBUTE_VALUE_PATTERN =
+      Pattern.compile("^[0-9a-zA-Z][0-9a-zA-Z-_.]*");
 
   public static void checkAndThrowLabelName(String label) throws IOException {
     if (label == null || label.isEmpty() || label.length() > MAX_LABEL_LENGTH) {
@@ -69,7 +71,7 @@ public final class NodeLabelUtil {
       return;
     }
 
-    boolean match = LABEL_OR_VALUE_PATTERN.matcher(value).matches();
+    boolean match = ATTRIBUTE_VALUE_PATTERN.matcher(value).matches();
 
     if (!match) {
       throw new IOException("attribute value should only contains "

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/test/java/org/apache/hadoop/yarn/nodelabels/TestNodeLabelUtil.java

@@ -0,0 +1,47 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.hadoop.yarn.nodelabels;
+
+import static org.junit.Assert.fail;
+import org.junit.Test;
+
+public class TestNodeLabelUtil {
+
+  @Test
+  public void testAttributeValueAddition() {
+    String[] values =
+        new String[] {"1_8", "1.8", "ABZ", "ABZ", "az", "a-z","a_z", "123456789"};
+    for (String val : values) {
+      try {
+        NodeLabelUtil.checkAndThrowAttributeValue(val);
+      } catch (Exception e) {
+        fail("Valid values for NodeAttributeValue :" + val);
+      }
+    }
+
+    String[] invalidVals = new String[] {"_18","1,8","1/5",".15","1\\5"};
+    for (String val : invalidVals) {
+      try {
+        NodeLabelUtil.checkAndThrowAttributeValue(val);
+        fail("Valid values for NodeAttributeValue :" + val);
+      } catch (Exception e) {
+        // IGNORE
+      }
+    }
+  }
+}