SDC-12918: JDBC Origins: Log multiple keys if the table is not partit…

…ionable

Change-Id: I4d8424022edd90cfbbb5a14488b98c2824189a53
Reviewed-on: https://review.streamsets.net/c/datacollector/+/27638
Tested-by: StreamSets CI <streamsets-ci-spam@streamsets.com>
Reviewed-by: Keith Burns <keith@streamsets.com>

jdbc-protolib/src/main/java/com/streamsets/pipeline/lib/jdbc/multithread/TableContext.java

@@ -250,8 +250,9 @@ public static boolean isPartitionable(TableContext sourceTableContext, List<Stri
 
     if (sourceTableContext.getOffsetColumns().size() > 1) {
       reasons.add(String.format(
-          "Table %s is not partitionable because it has more than one offset column",
-          tableName
+          "Table %s is not partitionable because it has more than one offset column: %s",
+          tableName,
+          String.join(", ", sourceTableContext.getOffsetColumns())
       ));
     }