Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/4804#discussion_r25552927
--- Diff:
core/src/test/java/org/apache/spark/util/collection/TestTimSort.java ---
@@ -0,0 +1,133 @@
+/*
+ * 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.spark.util.collection;
+
+import java.util.*;
+
+/**
+ * This codes generates a int array which fails the standard TimSort.
+ *
+ * The blog that reported the bug
+ * http://www.envisage-project.eu/timsort-specification-and-verification/
+ *
+ * The algorithms to reproduce the bug is obtained from the reporter of
the bug
+ * https://github.com/abstools/java-timsort-bug
+ *
+ * Licensed under Apache License 2.0
+ * https://github.com/abstools/java-timsort-bug/blob/master/LICENSE
--- End diff --
If this test code is your own work, then this statement is redundant with
the license header, so would be removed.
But it's copied from the project above right? then you can't write a
license header here that says it was licensed to the ASF. If anything we would
reproduce the plain vanilla AL2 stanza from the plain AL2 license text up above
in the file's license header.
That or not copy this test code. This Java code needs a bit more style work
to match coding practices here.
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