shirshanka commented on a change in pull request #2653: [GOBBLIN-787] Add an
option to include the task start time in the out…
URL: https://github.com/apache/incubator-gobblin/pull/2653#discussion_r288410363
##########
File path:
gobblin-runtime/src/main/java/org/apache/gobblin/runtime/fork/Fork.java
##########
@@ -529,9 +529,18 @@ protected void cleanup() {
*/
private DataWriter<Object> buildWriter()
throws IOException {
+ String writerId = this.taskId;
+
+ // Add the task starting time if configured.
+ // This is used to reduce file name collisions which can happen due to the
scheduling of a task on multiple workers.
+ // One case where this occurs is when a worker gets disconnected from a
Helix cluster.
+ if
(this.taskState.getPropAsBoolean(ConfigurationKeys.WRITER_ADD_TASK_TIMESTAMP,
false)) {
+ writerId = this.taskId + "_" +
this.taskState.getProp(ConfigurationKeys.TASK_START_TIME_MILLIS_KEY, "0");
Review comment:
If it is a bug to not find a set value for TASK_START_TIME_MILLIS_KEY,
choose from:
a) throw an exception and die
b) log a warning and continue with a sane default (System.currentTime)
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