Github user bhupeshchawda commented on a diff in the pull request:
https://github.com/apache/incubator-apex-malhar/pull/215#discussion_r62800802
--- Diff:
library/src/main/java/com/datatorrent/lib/db/AbstractTransactionableStoreOutputOperator.java
---
@@ -67,6 +68,8 @@ public void process(T t)
};
+ public final transient DefaultOutputPort<T> error = new
DefaultOutputPort<>();
--- End diff --
This was added to track the error tuples which fail to be processed /
inserted into database. It made sense to add it at the same place where the
input port was declared.
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