Github user mxm commented on a diff in the pull request:
https://github.com/apache/flink/pull/934#discussion_r35991266
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/executiongraph/ExecutionGraph.java
---
@@ -75,24 +78,24 @@
* The execution graph is the central data structure that coordinates the
distributed
* execution of a data flow. It keeps representations of each parallel
task, each
* intermediate result, and the communication between them.
- *
+ * <p/>
* The execution graph consists of the following constructs:
* <ul>
- * <li>The {@link ExecutionJobVertex} represents one vertex from the
JobGraph (usually one operation like
- * "map" or "join") during execution. It holds the aggregated
state of all parallel subtasks.
- * The ExecutionJobVertex is identified inside the graph by the
{@link JobVertexID}, which it takes
- * from the JobGraph's corresponding JobVertex.</li>
- * <li>The {@link ExecutionVertex} represents one parallel subtask.
For each ExecutionJobVertex, there are
- * as many ExecutionVertices as the parallelism. The
ExecutionVertex is identified by
- * the ExecutionJobVertex and the number of the parallel
subtask</li>
- * <li>The {@link Execution} is one attempt to execute a
ExecutionVertex. There may be multiple Executions
- * for the ExecutionVertex, in case of a failure, or in the case
where some data needs to be recomputed
- * because it is no longer available when requested by later
operations. An Execution is always
- * identified by an {@link ExecutionAttemptID}. All messages
between the JobManager and the TaskManager
- * about deployment of tasks and updates in the task status always
use the ExecutionAttemptID to
- * address the message receiver.</li>
+ * <li>The {@link ExecutionJobVertex} represents one vertex from the
JobGraph (usually one operation like
+ * "map" or "join") during execution. It holds the aggregated state of all
parallel subtasks.
+ * The ExecutionJobVertex is identified inside the graph by the {@link
JobVertexID}, which it takes
+ * from the JobGraph's corresponding JobVertex.</li>
+ * <li>The {@link ExecutionVertex} represents one parallel subtask. For
each ExecutionJobVertex, there are
+ * as many ExecutionVertices as the parallelism. The ExecutionVertex is
identified by
+ * the ExecutionJobVertex and the number of the parallel subtask</li>
+ * <li>The {@link Execution} is one attempt to execute a ExecutionVertex.
There may be multiple Executions
+ * for the ExecutionVertex, in case of a failure, or in the case where
some data needs to be recomputed
+ * because it is no longer available when requested by later operations.
An Execution is always
+ * identified by an {@link ExecutionAttemptID}. All messages between the
JobManager and the TaskManager
+ * about deployment of tasks and updates in the task status always use the
ExecutionAttemptID to
+ * address the message receiver.</li>
--- End diff --
This change seems unnecessary.
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