SparkLauncher is blocked until mail process is killed.

I tried to use SparkLauncher (org.apache.spark.launcher.SparkLauncher) to submit a Spark Streaming job, however, in my test, the SparkSubmit process got stuck in the "addJar" procedure. Only when the main process (the caller of SparkLauncher) is killed, the submit procedeure continues to run. I

Re: SparkLauncher is blocked until mail process is killed.

Could you please provide the jstack output? That would help the devs identify the blocking operation more easily. On Thu, Oct 29, 2015 at 6:54 PM, 陈宇航 wrote: > I tried to use SparkLauncher (org.apache.spark.launcher.SparkLauncher) to > submit a Spark Streaming job,