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https://issues.apache.org/jira/browse/CAMEL-12607?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16531081#comment-16531081
 ] 

ASF GitHub Bot commented on CAMEL-12607:
----------------------------------------

dmvolod closed pull request #2402: CAMEL-12607: When using Tokenizer skipFirst 
java.util.NoSuchElementException if only one element [will merge after 2.22.0 
release]
URL: https://github.com/apache/camel/pull/2402
 
 
   

This is a PR merged from a forked repository.
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diff --git 
a/camel-core/src/main/java/org/apache/camel/util/GroupTokenIterator.java 
b/camel-core/src/main/java/org/apache/camel/util/GroupTokenIterator.java
index 0bfd2689a4b..2f05116d8f0 100644
--- a/camel-core/src/main/java/org/apache/camel/util/GroupTokenIterator.java
+++ b/camel-core/src/main/java/org/apache/camel/util/GroupTokenIterator.java
@@ -50,7 +50,7 @@
     private final ByteArrayOutputStream bos = new ByteArrayOutputStream();
     
     /**
-     * Creates a new token based group titerator
+     * Creates a new token based group iterator
      *
      * @param camelContext  the camel context
      * @param it            the iterator to group
@@ -155,7 +155,12 @@ private Object doNext() throws IOException, 
NoTypeConversionAvailableException {
             data = it.next();
 
             if (skipFirst && hasSkipFirst.compareAndSet(false, true)) {
-                data = it.next();
+                if (it.hasNext()) {
+                    data = it.next();
+                } else {
+                    // Content with header only which is marked to skip
+                    data = "";
+                }
             }
 
             // include token in between
diff --git 
a/camel-core/src/test/java/org/apache/camel/processor/SplitGroupSkipFirstTest.java
 
b/camel-core/src/test/java/org/apache/camel/processor/SplitGroupSkipFirstTest.java
index d85cac27c21..5c09847c27e 100644
--- 
a/camel-core/src/test/java/org/apache/camel/processor/SplitGroupSkipFirstTest.java
+++ 
b/camel-core/src/test/java/org/apache/camel/processor/SplitGroupSkipFirstTest.java
@@ -31,6 +31,14 @@ public void testSplitSkipFirst() throws Exception {
 
         assertMockEndpointsSatisfied();
     }
+    
+    public void testSplitSkipFirstOnlyHeader() throws Exception {
+        getMockEndpoint("mock:group").expectedBodiesReceived("");
+
+        template.sendBody("direct:start", "##comment\n");
+
+        assertMockEndpointsSatisfied();
+    }
 
     @Override
     protected RouteBuilder createRouteBuilder() throws Exception {


 

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> When using Tokenizer skipFirst - java.util.NoSuchElementException if only one 
> element
> -------------------------------------------------------------------------------------
>
>                 Key: CAMEL-12607
>                 URL: https://issues.apache.org/jira/browse/CAMEL-12607
>             Project: Camel
>          Issue Type: Bug
>          Components: camel-core
>    Affects Versions: 2.21.1
>            Reporter: Sergey Savenko
>            Assignee: Dmitry Volodin
>            Priority: Minor
>
> I use {{.split().tokenize("\n", 10000, true).streaming()}} to stream csv file 
> with header row and skip first line.
>  When file contains ONLY header row - {{java.util.NoSuchElementException}} is 
> thrown in 
> [https://github.com/apache/camel/blob/camel-2.21.1/camel-core/src/main/java/org/apache/camel/util/GroupTokenIterator.java#L158],
>  because when it skips first line - it does not check if it has next line and 
> just calls next().



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