wynot12 commented on a change in pull request #73: [Nemo-62] Support Multiple
Jobs Submission in a Single User Program
URL: https://github.com/apache/incubator-nemo/pull/73#discussion_r201415610
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File path: runtime/driver/src/main/java/edu/snu/nemo/driver/NemoDriver.java
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@@ -154,9 +161,14 @@ public void onNext(final ActiveContext activeContext) {
*/
public void startSchedulingUserApplication(final String dagString) {
// Launch user application (with a new thread)
- final ExecutorService userApplicationRunnerThread =
Executors.newSingleThreadExecutor();
+ if (userApplicationRunnerThread == null) {
+ userApplicationRunnerThread = Executors.newSingleThreadExecutor();
+ }
+ // This should be able to run multiple times.
userApplicationRunnerThread.execute(() ->
userApplicationRunner.run(dagString));
Review comment:
What happens here?
Did you intended multiple dag submissions go through this method
concurrently?
`userApplicationRunner.run` is a blocking call that waits for the dag to
complete.
Then why did you use `Executors.newSingleThreadExecutor()` for
userApplicationRunnerThread?
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