[ADAM-1179] Improve error message when globbing a parquet file fails.

Resolves bigdatagenomics#1179.
fnothaft · Sep 20, 2016 · 8bd6c0e · 8bd6c0e
1 parent ca4d964
commit 8bd6c0e
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/adam-core/src/main/scala/org/bdgenomics/adam/rdd/ADAMContext.scala b/adam-core/src/main/scala/org/bdgenomics/adam/rdd/ADAMContext.scala
@@ -306,7 +306,10 @@ class ADAMContext private (@transient val sc: SparkContext) extends Serializable
     // the path must match at least one file
     if (paths.isEmpty) {
       throw new FileNotFoundException(
-        s"Couldn't find any files matching ${path.toUri}"
+        s"Couldn't find any files matching ${path.toUri}. If you are trying to" +
+          " glob a directory of Parquet files, you need to glob inside the" +
+          " directory as well (e.g., \"glob.me.*.adam/*\", instead of" +
+          " \"glob.me.*.adam\"."
       )
     }