Revision c6ba647935e9108d139cc8914091790917567ad7 authored by IngoSchuster on 30 June 2017, 03:16:09 UTC, committed by Wenchen Fan on 30 June 2017, 03:16:19 UTC
## What changes were proposed in this pull request? Please see also https://issues.apache.org/jira/browse/SPARK-21176 This change limits the number of selector threads that jetty creates to maximum 8 per proxy servlet (Jetty default is number of processors / 2). The newHttpClient for Jettys ProxyServlet class is overwritten to avoid the Jetty defaults (which are designed for high-performance http servers). Once https://github.com/eclipse/jetty.project/issues/1643 is available, the code could be cleaned up to avoid the method override. I really need this on v2.1.1 - what is the best way for a backport automatic merge works fine)? Shall I create another PR? ## How was this patch tested? (Please explain how this patch was tested. E.g. unit tests, integration tests, manual tests) The patch was tested manually on a Spark cluster with a head node that has 88 processors using JMX to verify that the number of selector threads is now limited to 8 per proxy. gurvindersingh zsxwing can you please review the change? Author: IngoSchuster <ingo.schuster@de.ibm.com> Author: Ingo Schuster <ingo.schuster@de.ibm.com> Closes #18437 from IngoSchuster/master. (cherry picked from commit 88a536babf119b7e331d02aac5d52b57658803bf) Signed-off-by: Wenchen Fan <wenchen@databricks.com>
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