Github user dragos commented on a diff in the pull request:
https://github.com/apache/spark/pull/4984#discussion_r30055487
--- Diff:
core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/CoarseMesosSchedulerBackend.scala
---
@@ -130,7 +142,7 @@ private[spark] class CoarseMesosSchedulerBackend(
command.setValue(
"%s \"%s\" org.apache.spark.executor.CoarseGrainedExecutorBackend"
.format(prefixEnv, runScript) +
- s" --driver-url $driverUrl" +
+ s" --driver-url $driverURL" +
s" --executor-id ${offer.getSlaveId.getValue}" +
--- End diff --
3 Mesos slaves in the local network, driver running on my machine. I
modified the code to use the task ID, as in your original PR.
I'm running spark-shell with something like this:
```
val rdd = sc.parallelize(1 to 10000000, 500)
val rdd1 = rdd.zipWithIndex.groupBy(_._1 / 100)
rdd1.cache()
rdd1.collect()
```
spark-defaults.conf:
```
spark.mesos.coarse true
spark.shuffle.service.enabled true
spark.dynamicAllocation.enabled true
spark.dynamicAllocation.minExecutors 1
spark.dynamicAllocation.maxExecutors 3
spark.dynamicAllocation.executorIdleTimeout 15
```
I can see the executors being shut down and coming back to life...
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