Lianhui Wang created SPARK-4195:
-----------------------------------
Summary: retry to fetch blocks's result when fetchfailed's reason
is connection timeout
Key: SPARK-4195
URL: https://issues.apache.org/jira/browse/SPARK-4195
Project: Spark
Issue Type: Improvement
Components: Spark Core
Reporter: Lianhui Wang
when there are many executors in a application(example:1000),Connection timeout
often occure.Exception is:
WARN nio.SendingConnection: Error finishing connection
java.net.ConnectException: Connection timed out
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at
sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:739)
at
org.apache.spark.network.nio.SendingConnection.finishConnect(Connection.scala:342)
at
org.apache.spark.network.nio.ConnectionManager$$anon$11.run(ConnectionManager.scala:273)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:744)
that will make driver as these executors are lost,but in fact these executors
are alive.so add retry mechanism to reduce the probability of the occurrence of
this problem.
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