retrun -1 when tgt has remaining and src expired first in Text.find

Author: xinqiu.hu

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/Text.java

@@ -199,10 +199,9 @@ public int find(String what, int start) {
           int pos = src.position()-1;
           while (tgt.hasRemaining()) {
             if (!src.hasRemaining()) { // src expired first
-              tgt.reset();
-              src.reset();
-              found = false;
-              break;
+              // the remaining bytes in src will always smaller than tgt,
+              // so we can return -1 directory
+              return -1;
             }
             if (!(tgt.get() == src.get())) {
               tgt.reset();

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/TestText.java

@@ -238,6 +238,7 @@ public void testFind() throws Exception {
     assertThat(text.find("ac")).isEqualTo(-1);
     assertThat(text.find("\u20ac")).isEqualTo(4);
     assertThat(text.find("\u20ac", 5)).isEqualTo(11);
+    assertThat(text.find("cd\u20acq")).isEqualTo(-1);
   }
 
   @Test